FN Thomson Reuters Web of Science™
VR 1.0
PT J
AU Hoyer, S
Lopez-Morales, M
Rojo, P
Nascimbeni, V
Hidalgo, S
Astudillo-Defru, N
Concha, F
Contreras, Y
Servajean, E
Hinse, TC
AF Hoyer, S.
Lopez-Morales, M.
Rojo, P.
Nascimbeni, V.
Hidalgo, S.
Astudillo-Defru, N.
Concha, F.
Contreras, Y.
Servajean, E.
Hinse, T. C.
TI TraMoS project - III. Improved physical parameters, timing analysis and
starspot modelling of the WASP-4b exoplanet system from 38 transit
observations
SO MONTHLY NOTICES OF THE ROYAL ASTRONOMICAL SOCIETY
LA English
DT Article
DE methods: data analysis; techniques: photometric; planets and satellites:
individual: WASP-4b; stars: individual: WASP-4; planetary systems;
starspots
ID PLANETARY SYSTEM; GLOBAL DYNAMICS; LIGHT CURVES; PHASE-SPACE;
PHOTOMETRY; JUPITER
AB We report 12 new transit observations of the exoplanet WASP-4b from the Transit Monitoring in the South (TraMoS) project. These transits are combined with all previously published transit data for this planet to provide an improved radius measurement of R-p = 1.395 +/- 0.022R(jup) and improved transit ephemerides. In a new homogeneous analysis in search for transit timing variations (TTVs) we find no evidence of those with rms amplitudes larger than 20 s over a 4-yr time span. This lack of TTVs rules out the presence of additional planets in the system with masses larger than about 2.5, 2.0 and 1.0 M-circle plus around the 1:2, 5:3 and 2:1 orbital resonances. Our search for the variation of other parameters, such as orbital inclination and transit depth, also yields negative results over the total time span of the transit observations. Finally, we perform a simple study of stellar spots configurations of the system and conclude that the star rotational period is about 34 d.
C1 [Hoyer, S.; Rojo, P.; Astudillo-Defru, N.; Concha, F.; Contreras, Y.; Servajean, E.] Univ Chile, Dept Astron, Santiago, Chile.
[Hoyer, S.; Hidalgo, S.] Inst Astrofis Canarias, E-38200 Tenerife, Canary Islands, Spain.
[Hoyer, S.; Hidalgo, S.] Univ La Laguna, Dept Astrophys, E-38200 Tenerife, Canary Islands, Spain.
[Lopez-Morales, M.] Harvard Smithsonian Ctr Astrophys, Cambridge, MA 02138 USA.
[Nascimbeni, V.] Univ Padua, Dipartimento Fis & Astron, I-35122 Padua, Italy.
[Nascimbeni, V.] INAF Osservatorio Astron Padova, I-35122 Padua, Italy.
[Astudillo-Defru, N.] UJF Grenoble 1 CNRS INSU, IPAG, UMR 5274, F-38041 Grenoble, France.
[Hinse, T. C.] Korea Astron & Space Sci Inst, Taejon 305348, South Korea.
[Hinse, T. C.] Armagh Observ, Armagh BT61 9DG, North Ireland.
RP Hoyer, S (reprint author), Univ Chile, Dept Astron, Casilla 36-D, Santiago, Chile.
EM shoyer@das.uchile.cl
RI Rojo, Patricio/I-5765-2016;
OI Astudillo-Defru, Nicola/0000-0002-8462-515X; Hidalgo,
Sebastian/0000-0002-0002-9298; Contreras, Yanett/0000-0002-6388-3635
FU Basal [PFB06]; Fondap [15010003]; Fondecyt [11080271, 1120299];
ALMA-CONICYT FUND [31090030]; Spanish Ministry of Economy and
Competitiveness (MINECO) under the Severo Ochoa Excellence Program
MINECO at the IAC [SEV-2011-0187]; KRCF via the KRCF Young Scientist
Fellowship program; KASI [2013-9-400-00]; SFI/HEA Irish Centre for
High-End Computing (ICHEC); Universita a di Padova through the 'progetto
di Ateneo' [CPDA103591]; SOAR Telescope at Cerro Pachon Observatory
[CNTAC-08B-046, CNTAC-09A-089, CNTAC-09B-050, CNTAC-10A-089,
CNTAC-10B-066]
FX The authors would like thank D. Dragomir and S. Kane for providing TERMS
light curves, M. Gillon for the VLT data and the anonymous referee for
the useful and accurate comments which helped to improve this
manuscript. SH and PR acknowledge support from Basal PFB06, Fondap
#15010003 and Fondecyt #11080271 and #1120299. SH received support from
ALMA-CONICYT FUND #31090030 and from the Spanish Ministry of Economy and
Competitiveness (MINECO) under the 2011 Severo Ochoa Excellence Program
MINECO SEV-2011-0187 at the IAC. TCH acknowledges support from KRCF via
the KRCF Young Scientist Fellowship program and financial support from
KASI grant number 2013-9-400-00. TCH wish to acknowledge the SFI/HEA
Irish Centre for High-End Computing (ICHEC) for the provision of
computational facilities and support. VN acknowledges partial support by
the Universita a di Padova through the 'progetto di Ateneo' #CPDA103591.
We thank the staff of CTIO and SOAR for the help and continuous support
during the numerous observing nights, and R. Sanchis-Ojeda for helpful
comments and discussions. Based on observations made with the SMARTS 1-m
telescope at CTIO and the SOAR Telescope at Cerro Pachon Observatory
under programmes ID CNTAC-08B-046, -09A-089, -09B-050, -10A-089 and
-10B-066.
NR 28
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PU OXFORD UNIV PRESS
PI OXFORD
PA GREAT CLARENDON ST, OXFORD OX2 6DP, ENGLAND
SN 0035-8711
EI 1365-2966
J9 MON NOT R ASTRON SOC
JI Mon. Not. Roy. Astron. Soc.
PD SEP
PY 2013
VL 434
IS 1
BP 46
EP 58
DI 10.1093/mnras/stt962
PG 13
WC Astronomy & Astrophysics
SC Astronomy & Astrophysics
GA 207XA
UT WOS:000323636800004
ER
PT J
AU Ting, YS
Rix, HW
Bovy, J
van de Ven, G
AF Ting, Yuan-Sen
Rix, Hans-Walter
Bovy, Jo
van de Ven, Glenn
TI Constraining the Galactic potential via action-based distribution
functions for mono-abundance stellar populations
SO MONTHLY NOTICES OF THE ROYAL ASTRONOMICAL SOCIETY
LA English
DT Article
DE Galaxy: disc; Galaxy: fundamental parameters; Galaxy: halo; Galaxy:
kinematics and dynamics; Galaxy: structure
ID MILKY-WAY DISK; BLACK-HOLE; RADIAL MIGRATION; MASS MODELS; GALAXY;
SUBPOPULATIONS; KINEMATICS; DENSITY; ORBITS; STARS
AB We present a rigorous and practical way of constraining the Galactic potential based on the phase-space information for many individual stars. Such an approach is needed to dynamically model the data from ongoing spectroscopic surveys of the Galaxy and in the future Gaia. This approach describes the orbit distribution of stars by a family of parametrized distribution function (DF) proposed by McMillan and Binney, which are based on actions. We find that these parametrized DFs are flexible enough to capture well the observed phase-space distributions of individual abundance-selected Galactic subpopulations of stars ('mono-abundance populations') for a disc-like gravitational potential, which enables independent dynamical constraints from each of the Galactic mono-abundance populations.
We lay out a statistically rigorous way to constrain the Galactic potential parameters by constructing the joint likelihood of potential and DF parameters, and subsequently marginalizing over the DF parameters. This approach explicitly incorporates the spatial selection function inherent to all Galactic surveys, and can account for the uncertainties of the individual position-velocity observations.
On that basis, we study the precision of the parameters of the Galactic potential that can be reached with various sample sizes and realistic spatial selection functions. By creating mock samples from the DF, we show that, even under a restrictive and realistic spatial selection function, given a two-parameter gravitational potential, one can recover the true potential parameters to a few per cent with sample sizes of a few thousands. The assumptions of axisymmetry, of DFs that are smooth in the actions and of no time variation remain important limitations in our current study.
C1 [Ting, Yuan-Sen] Harvard Smithsonian Ctr Astrophys, Cambridge, MA 02139 USA.
[Ting, Yuan-Sen; Rix, Hans-Walter; van de Ven, Glenn] Max Planck Inst Astron, D-69117 Heidelberg, Germany.
[Bovy, Jo] Inst Adv Study, Princeton, NJ 08540 USA.
RP Ting, YS (reprint author), Harvard Smithsonian Ctr Astrophys, 60 Garden St, Cambridge, MA 02139 USA.
EM yuan-sen.ting@cfa.harvard.edu
OI Ting, Yuan-Sen/0000-0001-5082-9536; Bovy, Jo/0000-0001-6855-442X
FU Max-Planck-Institut fur Astronomie; NASA through Space Telescope Science
Institute [HST-HF-51285.01]; NASA [NAS5-26555]; German Research
Foundation DFG; [SFB 881]
FX We thank the anonymous referee for helpful comments. We also thank Elena
D'Onghia for providing data from the simulation in D'Onghia et al.
(2013). YST and JB are grateful to the Max-Planck-Institut fur
Astronomie for its hospitality and financial support during the period
in which this research was performed. JB was supported by NASA through
the Hubble Fellowship grant HST-HF-51285.01 from the Space Telescope
Science Institute, which is operated by the Association of Universities
for Research in Astronomy, Incorporated, under the NASA contract
NAS5-26555. JB was also partially supported by SFB 881 funded by the
German Research Foundation DFG.
NR 33
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PU OXFORD UNIV PRESS
PI OXFORD
PA GREAT CLARENDON ST, OXFORD OX2 6DP, ENGLAND
SN 0035-8711
EI 1365-2966
J9 MON NOT R ASTRON SOC
JI Mon. Not. Roy. Astron. Soc.
PD SEP
PY 2013
VL 434
IS 1
BP 652
EP 660
DI 10.1093/mnras/stt1053
PG 9
WC Astronomy & Astrophysics
SC Astronomy & Astrophysics
GA 207XA
UT WOS:000323636800046
ER
PT J
AU Postigo, AD
Campana, S
Thone, CC
D'Avanzo, P
Sanchez-Ramirez, R
Melandri, A
Gorosabel, J
Ghirlanda, G
Veres, P
Martin, S
Petitpas, G
Covino, S
Fynbo, JPU
Levan, AJ
AF de Ugarte Postigo, A.
Campana, S.
Thoene, C. C.
D'Avanzo, P.
Sanchez-Ramirez, R.
Melandri, A.
Gorosabel, J.
Ghirlanda, G.
Veres, P.
Martin, S.
Petitpas, G.
Covino, S.
Fynbo, J. P. U.
Levan, A. J.
TI The obscured hyper-energetic GRB 120624B hosted by a luminous compact
galaxy at z=2.20
SO ASTRONOMY & ASTROPHYSICS
LA English
DT Article
DE gamma-ray burst: individual: GRB 120624B
ID GAMMA-RAY BURST; STAR-FORMATION; IMAGE SUBTRACTION; SPECTROSCOPY;
METALLICITY; AFTERGLOWS; RESOLUTION; REDSHIFTS; SPECTRA; MASS
AB Context. Gamma-ray bursts (GRBs) are the most luminous explosions that we can witness in the Universe. Studying the most extreme cases of these phenomena allows us to constrain the limits for the progenitor models.
Aims. In this Letter, we study the prompt emission, afterglow, and host galaxy of GRB 120624B, one of the brightest GRBs detected by Fermi, to derive the energetics of the event and characterise the host galaxy in which it was produced.
Methods. Following the high-energy detection we conducted a multi-wavelength follow-up campaign, including near-infrared imaging from HAWKI/VLT, optical from OSIRIS/GTC, X-ray observations from the Chandra X-ray Observatory and at submillimetre/millimetre wavelengths from SMA. Optical/NIR spectroscopy was performed with X-shooter/VLT.
Results. We detect the X-ray and NIR afterglow of the burst and determine a redshift of z = 2.1974 +/- 0.0002 through identification of emission lines of [O II], [O III] and H-alpha from the host galaxy of the GRB. This implies an energy release of E-iso,E-gamma = (3.0 +/- 0.2)x10(54) erg, amongst the most luminous ever detected. The observations of the afterglow indicate high obscuration with A(V) > 1.5. The host galaxy is compact, with R-1/2 < 1.6 kpc, but luminous, at L similar to 1.5 L* and has a star formation rate of 91 +/- 6 M-circle dot/yr as derived from Ha.
Conclusions. As for other highly obscured GRBs, GRB 120624B is hosted by a luminous galaxy, which we also prove to be compact, with very intense star formation. It is one of the most luminous host galaxies associated with a GRB, showing that the host galaxies of long GRBs are not always blue dwarf galaxies, as previously thought.
C1 [de Ugarte Postigo, A.; Thoene, C. C.; Sanchez-Ramirez, R.; Gorosabel, J.] Inst Astrofis Andalucia IAA CSIC, Granada 18008, Spain.
[de Ugarte Postigo, A.; Fynbo, J. P. U.] Niels Bohr Inst, Dark Cosmol Ctr, DK-2100 Copenhagen O, Denmark.
[Campana, S.; D'Avanzo, P.; Melandri, A.; Ghirlanda, G.; Covino, S.] INAF Osservatorio Astron Brera, I-23807 Merate, LC, Italy.
[Gorosabel, J.] Univ Pais Vasco UPV EHU, Unidad Asociada Grp Ciencia Planetarias UPV EHU I, Dept Fis Aplicada 1, ETS Ingn, Bilbao 48013, Spain.
[Gorosabel, J.] Basque Fdn Sci, Bilbao 48008, Spain.
[Veres, P.] Penn State Univ, Dept Astron & Astrophys, Dept Phys, University Pk, PA 16802 USA.
[Veres, P.] Penn State Univ, Ctr Particle & Gravitat Astrophys, University Pk, PA 16802 USA.
[Martin, S.] European So Observ, Santiago De Compostela, Spain.
[Petitpas, G.] Harvard Smithsonian Ctr Astrophys, Hilo, HI 96720 USA.
[Levan, A. J.] Univ Warwick, Dept Phys, Coventry CV4 7AL, W Midlands, England.
RP Postigo, AD (reprint author), Inst Astrofis Andalucia IAA CSIC, Glorieta Astron S-N, Granada 18008, Spain.
EM adeugartepostigo@gmail.com
RI Fynbo, Johan/L-8496-2014;
OI Ghirlanda, Giancarlo/0000-0001-5876-9259; Fynbo,
Johan/0000-0002-8149-8298; Campana, Sergio/0000-0001-6278-1576; Thone,
Christina/0000-0002-7978-7648; de Ugarte Postigo,
Antonio/0000-0001-7717-5085; Covino, Stefano/0000-0001-9078-5507;
Sanchez-Ramirez, Ruben/0000-0002-7158-5099
FU Spanish research project [AYA2012-39362-C02-02]; European Commission
under the Marie Curie Career Integration Grant programme
[FP7-PEOPLE-2012-CIG 322307]; Unidad Asociada IAA-CSIC_ETSI-UPV/EHU;
Ikerbasque Foundation for Science; DNRF; ASI [I/011/07/0]; PRIN-MIUR
[2009ERC3HT]
FX We thank the anonymous referee for the careful and constructive revision
of our manuscript. We thank Thomas Kruhler for his help with the SED
fitting and Lise Christensen for fruitful discussions. Based on
observations made with the Gran Telescopio Canarias (GTC) at the Roque
de los Muchachos Observatory (La Palma). The research activity of A.d.
U. P., C. T., and J.G. is supported by Spanish research project
AYA2012-39362-C02-02. AdUP acknowledges support by the European
Commission under the Marie Curie Career Integration Grant programme
(FP7-PEOPLE-2012-CIG 322307). J.G. is supported by the Unidad Asociada
IAA-CSIC_ETSI-UPV/EHU and the Ikerbasque Foundation for Science. P. V.
acknowledges NASA NNX13AH50G and OTKA K077795. The Dark Cosmology Centre
is funded by the DNRF. S. C. acknowledges support by ASI grant
I/011/07/0 and PRIN-MIUR grant 2009ERC3HT. We thank H. Tananbaum for
granting the Chandra DDT.
NR 45
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PU EDP SCIENCES S A
PI LES ULIS CEDEX A
PA 17, AVE DU HOGGAR, PA COURTABOEUF, BP 112, F-91944 LES ULIS CEDEX A,
FRANCE
SN 1432-0746
J9 ASTRON ASTROPHYS
JI Astron. Astrophys.
PD SEP
PY 2013
VL 557
AR L18
DI 10.1051/0004-6361/201322065
PG 6
WC Astronomy & Astrophysics
SC Astronomy & Astrophysics
GA 228TC
UT WOS:000325211900146
ER
PT J
AU Kristensen, LE
van Dishoeck, EF
Benz, AO
Bruderer, S
Visser, R
Wampfler, SF
AF Kristensen, L. E.
van Dishoeck, E. F.
Benz, A. O.
Bruderer, S.
Visser, R.
Wampfler, S. F.
TI Observational evidence for dissociative shocks in the inner 100 AU of
low-mass protostars using Herschel-HIFI
SO ASTRONOMY & ASTROPHYSICS
LA English
DT Article
DE astrochemistry; stars: formation; ISM: molecules; ISM: jets and outflows
ID YOUNG STELLAR OBJECTS; STAR-FORMING REGIONS; J CO OBSERVATIONS; NGC
1333; SUBMILLIMETER ARRAY; EMBEDDED PROTOSTARS; PACS SPECTROSCOPY; LINE
SPECTRA; KEY PROGRAM; HH 46
AB Aims. Herschel-HIFI spectra of H2O towards low-mass protostars show a distinct velocity component not seen in observations from the ground of CO or other species. The aim is to characterise this component in terms of excitation conditions and physical origin.
Methods. A velocity component with an offset of similar to 10 km s(-1) detected in spectra of the H2O 1(10)-1(01) 557 GHz transition towards six low-mass protostars in the "Water in star-forming regions with Herschel" (WISH) programme is also seen in higher-excited H2O lines. The emission from this component is quantified and local excitation conditions are inferred using 1D slab models. Data are compared to observations of hydrides (high-J CO, OH+, CH+, C+, OH) where the same component is uniquely detected.
Results. The velocity component is detected in all six targeted H2O transitions (E-up similar to 50-250 K), as well as in CO 16-15 towards one source, Ser SMM1. Inferred excitation conditions imply that the emission arises in dense (n similar to 5 x 10(6)-10(8) cm(-3)) and hot (T similar to 750 K) gas. The H2O and CO column densities are greater than or similar to 10(16) and 10(18) cm(-2), respectively, implying a low H2O abundance of similar to 10(-2) with respect to CO. The high column densities of ions such as OH+ and CH+ (both greater than or similar to 10(13) cm(-2)) indicate an origin close to the protostar where the UV field is strong enough that these species are abundant. The estimated radius of the emitting region is 100 AU. This component likely arises in dissociative shocks close to the protostar, an interpretation corroborated by a comparison with models of such shocks. Furthermore, one of the sources, IRAS 4A, shows temporal variability in the offset component over a period of two years which is expected from shocks in dense media. High-J CO gas detected with Herschel-PACS with T-rot similar to 700 K is identified as arising in the same component and traces the part of the shock where H-2 reforms. Thus, H2O reveals new dynamical components, even on small spatial scales in low-mass protostars.
C1 [Kristensen, L. E.; van Dishoeck, E. F.] Leiden Univ, Leiden Observ, NL-2300 RA Leiden, Netherlands.
[Kristensen, L. E.] Harvard Smithsonian Ctr Astrophys, Cambridge, MA 02138 USA.
[van Dishoeck, E. F.; Bruderer, S.] Max Planck Inst Extraterr Phys, D-85748 Garching, Germany.
[Benz, A. O.] ETH, Inst Astron, CH-8093 Zurich, Switzerland.
[Visser, R.] Univ Michigan, Dept Astron, Ann Arbor, MI 48109 USA.
[Wampfler, S. F.] Univ Copenhagen, Nat Hist Museum Denmark, Ctr Star & Planet Format, DK-1350 Copenhagen K, Denmark.
[Wampfler, S. F.] Univ Copenhagen, Niels Bohr Inst, DK-2100 Copenhagen O, Denmark.
RP Kristensen, LE (reprint author), Leiden Univ, Leiden Observ, POB 9513, NL-2300 RA Leiden, Netherlands.
EM lkristensen@cfa.harvard.edu
RI Wampfler, Susanne/D-2270-2015; Kristensen, Lars/F-4774-2011
OI Wampfler, Susanne/0000-0002-3151-7657; Kristensen,
Lars/0000-0003-1159-3721
FU Netherlands Research School for Astronomy (NOVA); Spinoza grant;
Netherlands Organisation for Scientific Research (NWO) [614.001.008];
European Community [238258]
FX The authors would like to thank the entire WISH team for many, many
stimulating discussions. HIFI has been designed and built by a
consortium of institutes and university departments from across Europe,
Canada and the US under the leadership of SRON Netherlands Institute for
Space Research, Groningen, The Netherlands with major contributions from
Germany, France and the US. Consortium members are: Canada: CSA, U.
Waterloo; France: CESR, LAB, LERMA, IRAM; Germany: KOSMA, MPIfR, MPS;
Ireland, NUI Maynooth; Italy: ASI, IFSI-INAF, Arcetri-INAF; Netherlands:
SRON, TUD; Poland: CAMK, CBK; Spain: Observatorio Astronomico Nacional
(IGN), Centro de Astrobiologia (CSIC-INTA); Sweden: Chalmers University
of Technology - MC2, RSS & GARD, Onsala Space Observatory, Swedish
National Space Board, Stockholm University - Stockholm Observatory;
Switzerland: ETH Zurich, FHNW; USA: Caltech, JPL, NHSC. Astrochemistry
in Leiden is supported by the Netherlands Research School for Astronomy
(NOVA), by a Spinoza grant and grant 614.001.008 from the Netherlands
Organisation for Scientific Research (NWO), and by the European
Community's Seventh Framework Programme FP7/2007-2013 under grant
agreement 238258 (LASSIE).
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PI LES ULIS CEDEX A
PA 17, AVE DU HOGGAR, PA COURTABOEUF, BP 112, F-91944 LES ULIS CEDEX A,
FRANCE
SN 0004-6361
EI 1432-0746
J9 ASTRON ASTROPHYS
JI Astron. Astrophys.
PD SEP
PY 2013
VL 557
AR A23
DI 10.1051/0004-6361/201321619
PG 13
WC Astronomy & Astrophysics
SC Astronomy & Astrophysics
GA 228TC
UT WOS:000325211900084
ER
PT J
AU Santerne, A
Fressin, F
Diaz, RF
Figueira, P
Almenara, JM
Santos, NC
AF Santerne, A.
Fressin, F.
Diaz, R. F.
Figueira, P.
Almenara, J. -M.
Santos, N. C.
TI The contribution of secondary eclipses as astrophysical false positives
to exoplanet transit surveys
SO ASTRONOMY & ASTROPHYSICS
LA English
DT Article
DE planetary systems; techniques: photometric; binaries: eclipsing
ID SOLAR-TYPE STARS; CLOSE BINARY STARS; SOPHIE VELOCIMETRY; EXTRASOLAR
PLANETS; MODEL ATMOSPHERES; LIGHT CURVES; KEPLER; CANDIDATES; STELLAR;
CATALOG
AB investigate the astrophysical false-positive configuration in exoplanet-transit surveys. It involves eclipsing binaries and giant planets that present only a secondary eclipse, as seen from the Earth. To test how an eclipsing binary configuration can mimic a planetary transit, we generated synthetic light curves of three examples of secondary-only eclipsing binary systems that we fit with a circular planetary model. Then, to evaluate its occurrence we modeled a population of binaries in double and triple systems based on binary statistics and occurrence. We find that 0.061% +/- 0.017% of main-sequence binary stars are secondary-only eclipsing binaries that mimics a planetary transit candidate with a size down to the size of the Earth. We then evaluate the occurrence that an occulting only giant planet can mimic an Earth-like planet or even a smaller one. We find that 0.009% +/- 0.002% of stars harbor a giant planet that only presents the secondary transit. Occulting-only giant planets mimic planets that are smaller than the Earth, and they are in the scope of space missions like Kepler and PLATO. We estimate that up to 43.1 +/- 5.6 Kepler objects of interest can be mimicked by this configuration of false positives, thereby re-evaluating the global false-positive rate of the Kepler mission from 9.4 +/- 0.9% to 11.3 +/- 1.1%. We note, however, that this new false positive scenario occurs at relatively long orbital periods compared with the median period of Kepler candidates.
C1 [Santerne, A.; Figueira, P.; Santos, N. C.] Univ Porto, Ctr Astrofis, P-4150762 Oporto, Portugal.
[Fressin, F.] Harvard Smithsonian Ctr Astrophys, Cambridge, MA 02138 USA.
[Diaz, R. F.; Almenara, J. -M.] Aix Marseille Univ, CNRS, LAM, UMR 7326, F-13388 Marseille, France.
[Santos, N. C.] Univ Porto, Fac Ciencias, Dept Fis & Astron, P-4100 Oporto, Portugal.
RP Santerne, A (reprint author), Univ Porto, Ctr Astrofis, Rua Estrelas, P-4150762 Oporto, Portugal.
EM alexandre.santerne@astro.up.pt
RI Santos, Nuno/E-9957-2011; Figueira, Pedro/J-4916-2013; Santerne,
Alexandre/M-9265-2013
OI Diaz, Rodrigo/0000-0001-9289-5160; Santos, Nuno/0000-0003-4422-2919;
Figueira, Pedro/0000-0001-8504-283X; Santerne,
Alexandre/0000-0002-3586-1316
FU European Research Council/European Community [239953]; Fundacao para a
Ciencia e a Tecnologia (FCT) [PTDC/CTE-AST/098528/2008]; CNES
FX We thank the anonymous referee for fruitful comments that helped us to
substantially improve the quality of this paper. We also thank J.
Johnson and T. Morton for their constructive comments about this paper.
A. S., P. F., and N.C.S. acknowledge the support by the European
Research Council/European Community under the FP7 through Starting Grant
agreement number 239953. NCS also acknowledges the support from Fundacao
para a Ciencia e a Tecnologia (FCT) in the form of grant reference
PTDC/CTE-AST/098528/2008. RFD is supported by the CNES.
NR 64
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PU EDP SCIENCES S A
PI LES ULIS CEDEX A
PA 17, AVE DU HOGGAR, PA COURTABOEUF, BP 112, F-91944 LES ULIS CEDEX A,
FRANCE
SN 0004-6361
EI 1432-0746
J9 ASTRON ASTROPHYS
JI Astron. Astrophys.
PD SEP
PY 2013
VL 557
AR A139
DI 10.1051/0004-631/201321475
PG 8
WC Astronomy & Astrophysics
SC Astronomy & Astrophysics
GA 228TC
UT WOS:000325211900066
ER
PT J
AU Saulder, C
Mieske, S
Zeilinger, WW
Chilingarian, I
AF Saulder, Christoph
Mieske, Steffen
Zeilinger, Werner W.
Chilingarian, Igor
TI Calibrating the fundamental plane with SDSS DR8 data
SO ASTRONOMY & ASTROPHYSICS
LA English
DT Article
DE galaxies: distances and redshifts; galaxies: elliptical and lenticular,
cD; galaxies: fundamental parameters; galaxies: statistics; galaxies:
structure
ID EARLY-TYPE GALAXIES; DIGITAL-SKY-SURVEY; SURFACE BRIGHTNESS TEST;
TO-LIGHT RATIO; ELLIPTIC GALAXIES; DATA RELEASE; VELOCITY DISPERSIONS;
PECULIAR VELOCITIES; STELLAR POPULATION; DISTANT CLUSTERS
AB We present a calibration of the fundamental plane using SDSS Data Release 8. We analysed about 93 000 elliptical galaxies up to z < 0.2, the largest sample used for the calibration of the fundamental plane so far. We incorporated up-to-date K-corrections and used GalaxyZoo data to classify the galaxies in our sample. We derived independent fundamental plane fits in all five Sloan filters u, g, r, i, and z. A direct fit using a volume-weighted least-squares method was applied to obtain the coefficients of the fundamental plane, which implicitly corrects for the Malmquist bias. We achieved an accuracy of 15% for the fundamental plane as a distance indicator. We provide a detailed discussion on the calibrations and their influence on the resulting fits. These re-calibrated fundamental plane relations form a well-suited anchor for large-scale peculiar-velocity studies in the nearby universe. In addition to the fundamental plane, we discuss the redshift distribution of the elliptical galaxies and their global parameters.
C1 [Saulder, Christoph; Mieske, Steffen] European So Observ, Santiago, Chile.
[Saulder, Christoph; Zeilinger, Werner W.] Univ Vienna, Dept Astrophys, A-1180 Vienna, Austria.
[Chilingarian, Igor] Harvard Smithsonian Ctr Astrophys, Smithsonian Astrophys Observ, Cambridge, MA 02138 USA.
[Chilingarian, Igor] Moscow MV Lomonosov State Univ, Sternberg Astron Inst, Moscow 119992, Russia.
RP Saulder, C (reprint author), European So Observ, Alonso Cordova 3107,Casilla 19001, Santiago, Chile.
EM csaulder@eso.org; smieske@eso.org; werner.zeilinger@univie.ac.at;
igor.chilingarian@cfa.harvard.edu
RI Chilingarian, Igor/N-5117-2016;
OI Chilingarian, Igor/0000-0002-7924-3253; Saulder,
Christoph/0000-0002-0408-5633
FU Alfred P. Sloan Foundation
FX Funding for SDSS-III has been provided by the Alfred P. Sloan
Foundation, the Participating Institutions, the National Science
Foundation, and the US Department of Energy Office of Science. The
SDSS-III web site is http://www.sdss3.org/.SDSS-III is managed by the
Astrophysical Research Consortium for the Participating Institutions of
the SDSS-III Collaboration including the University of Arizona, the
Brazilian Participation Group, Brookhaven National Laboratory,
University of Cambridge, Carnegie Mellon University, University of
Florida, the French Participation Group, the German Participation Group,
Harvard University, the Instituto de Astrofisica de Canarias, the
Michigan State/Notre Dame/JINA Participation Group, Johns Hopkins
University, Lawrence Berkeley National Laboratory, Max Planck Institute
for Astrophysics, Max Planck Institute for Extraterrestrial Physics, New
Mexico State University, New York University, Ohio State University,
Pennsylvania State University, University of Portsmouth, Princeton
University, the Spanish Participation Group, University of Tokyo,
University of Utah, Vanderbilt University, University of Virginia,
University of Washington, and Yale University. C. S. acknowledges the
support from an ESO studentship. I. C. acknowledges the support from the
Russian Federation President's grant MD-3288.2012.2. This research made
use of the "K-corrections calculator" service available at
http://kcor.sai.msu.ru/. I. C. acknowledges kind support from the ESO
Visitor Program. The publication is supported by the Austrian Science
Fund (FWF).
NR 67
TC 13
Z9 13
U1 0
U2 2
PU EDP SCIENCES S A
PI LES ULIS CEDEX A
PA 17, AVE DU HOGGAR, PA COURTABOEUF, BP 112, F-91944 LES ULIS CEDEX A,
FRANCE
SN 1432-0746
J9 ASTRON ASTROPHYS
JI Astron. Astrophys.
PD SEP
PY 2013
VL 557
AR A21
DI 10.1051/0004-6361/201321466
PG 36
WC Astronomy & Astrophysics
SC Astronomy & Astrophysics
GA 228TC
UT WOS:000325211900065
ER
PT J
AU Schneider, PC
Eisloffel, J
Gudel, M
Gunther, HM
Herczeg, G
Robrade, J
Schmitt, JHMM
AF Schneider, P. C.
Eisloeffel, J.
Guedel, M.
Guenther, H. M.
Herczeg, G.
Robrade, J.
Schmitt, J. H. M. M.
TI HST far-ultraviolet imaging of DG Tauri Fluorescent molecular hydrogen
emission from the wide opening-angle outflow
SO ASTRONOMY & ASTROPHYSICS
LA English
DT Article
DE stars: individual: DG Tauri; Herbig-Haro objects; ISM: jets and
outflows; stars: variables: T Tauri; Herbig Ae/Be; stars: formation
ID HUBBLE-SPACE-TELESCOPE; YOUNG STELLAR OBJECTS; HERBIG-HARO OBJECTS;
X-RAY JET; T-TAURI; H-2 EMISSION; CIRCUMSTELLAR ENVIRONMENTS; LAUNCHING
REGION; OPTICAL OUTFLOW; BOW SHOCK
AB One of the most thoroughly studied jets from all young stellar objects is the jet of DG Tau, which we imaged in the far-ultraviolet with the Hubble Space Telescope for the first time. These high spatial resolution images were obtained with long-pass filters and allow us to construct images tracing mainly H-2 and C IV emission. We find that the H-2 emission appears as a limb-brightened cone with additional emission close to the jet axis. The length of the rims is about 0 ''.3 or 42 AU before their brightness strongly drops, and the opening angle is about 90 degrees. Comparing our far-ultraviolet data with near-infrared data we find that the fluorescent H-2 emission probably traces the outer, cooler part of the disk wind while an origin of the H-2 emission in the surface layers (atmosphere) of the (flared) disk is unlikely. Furthermore, the spatial shape of the H-2 emission shows little variation over six years which suggests that the outer part of the disk wind is rather stable and probably not associated with the formation of individual knots. The C IV image shows that the emission is concentrated towards the jet axis. We find no indications for additional C IV emission at larger distances, which strengthens the association with the X-ray emission observed to originate within the DG Tau jet.
C1 [Schneider, P. C.; Robrade, J.; Schmitt, J. H. M. M.] Hamburger Sternwarte, D-21029 Hamburg, Germany.
[Eisloeffel, J.] Thuringer Landessternwarte Tautenburg, D-07778 Tautenburg, Germany.
[Guedel, M.] Univ Vienna, Dept Astrophys, A-1180 Vienna, Austria.
[Guenther, H. M.] Harvard Smithsonian Ctr Astrophys, Cambridge, MA 02138 USA.
[Herczeg, G.] Peking Univ, Kavli Inst Astron & Astrophys, Beijing 100871, Peoples R China.
RP Schneider, PC (reprint author), Hamburger Sternwarte, Gojenbergsweg 112, D-21029 Hamburg, Germany.
EM cschneider@hs.uni-hamburg.de
RI Guedel, Manuel/C-8486-2015;
OI Guedel, Manuel/0000-0001-9818-0588; Gunther, Hans
Moritz/0000-0003-4243-2840
FU DLR [50 OR 1112]; NASA [NAS5-26555]; NASA Office of Space Science
[NAG5-7584]; Austrian Science Fund (FWF)
FX We thank Francesca Bacciotti and Lorenzo Maurri for providing the [S II]
image. P. C. S was supported by the DLR under grant 50 OR 1112. The
paper is based on observations obtained by the Hubble Space Telescope.
Some of the data presented in this paper were obtained from the
Multimission Archive at the Space Telescope Science Institute (MAST).
STScI is operated by the Association of Universities for Research in
Astronomy, Inc., under NASA contract NAS5-26555. Support for MAST for
non-HST data is provided by the NASA Office of Space Science via grant
NAG5-7584 and by other grants and contracts. The publication is
supported by the Austrian Science Fund (FWF).
NR 50
TC 7
Z9 7
U1 0
U2 1
PU EDP SCIENCES S A
PI LES ULIS CEDEX A
PA 17, AVE DU HOGGAR, PA COURTABOEUF, BP 112, F-91944 LES ULIS CEDEX A,
FRANCE
SN 0004-6361
EI 1432-0746
J9 ASTRON ASTROPHYS
JI Astron. Astrophys.
PD SEP
PY 2013
VL 557
AR A110
DI 10.1051/0004-6361/201321564
PG 9
WC Astronomy & Astrophysics
SC Astronomy & Astrophysics
GA 228TC
UT WOS:000325211900076
ER
PT J
AU Wang, X
McIntosh, SW
Curdt, W
Tian, H
Peter, H
Xia, LD
AF Wang, X.
McIntosh, S. W.
Curdt, W.
Tian, H.
Peter, H.
Xia, L. -D.
TI Temperature dependence of ultraviolet line parameters in network and
internetwork regions of the quiet Sun and coronal holes
SO ASTRONOMY & ASTROPHYSICS
LA English
DT Article
DE Sun: atmosphere; Sun: UV radiation; line: profiles
ID FAST SOLAR-WIND; DOPPLER WAVELENGTH SHIFTS; EUV IMAGING SPECTROMETER;
TRANSITION-REGION; EMISSION-LINES; ACTIVE-REGION; SPECTROSCOPIC
OBSERVATIONS; SUMER TELESCOPE; SOHO; CHROMOSPHERE
AB Aims. We study the temperature dependence of the average Doppler shift and the non-thermal line width in network and internetwork regions for both the quiet Sun (QS) and the coronal hole (CH), by using observations of the Solar Ultraviolet Measurements of Emitted Radiation instrument onboard the Solar and Heliospheric Observatory spacecraft.
Methods. We obtain the average Doppler shift and non-thermal line width in the network regions of QS, internetwork regions of QS, network regions of CH, and internetwork regions of CH by applying a single-Gaussian fit to the line profiles averaged in each of the four regions. The formation temperatures of the lines we use cover the range from 10(4) to 1.2 x 10(6) K. Two simple scenarios are proposed to explain the temperature dependence of the line parameters in the network regions. In one of the scenarios, the spectral line consists of three components: a rapid, weak upflow generated in the lower atmosphere, a nearly static background, and a slow cooling downflow. In the other scenario, there are just two components, which include a bright core component and a faint wide tail one.
Results. An enhancement of the Doppler shift magnitude and the non-thermal line width in network regions compared to the internetwork regions is reported. We also report that most transition region lines are less redshifted (by 0-8 km s(-1)) and broader (by 0-5 km s(-1)) in CH compared to the counterparts of QS. In internetwork regions, the difference in the Doppler shifts between the coronal hole and the QS is slightly smaller, especially for the lines with formation temperatures lower than 2 x 10(5) K. And the two simple scenarios can reproduce the variation in the line parameters with the temperature very well.
Conclusions. Our results suggest that the physical processes in network and internetwork regions are different and that one needs to separate network and internetwork when discussing dynamics and physical properties of the solar atmosphere. The agreement between the results of the observation and our scenarios suggests that the temperature dependence of Doppler shifts and line widths might be caused by the different relative contributions of the three components at different temperatures. The results may shed new light on our understanding of the complex chromosphere-corona mass cycle. However, the existing observational results do not allow us to distinguish between the two scenarios. At this stage, a high-resolution instrument Interface Region Imaging Spectrograph is highly desirable.
C1 [Wang, X.] Peking Univ, Sch Earth & Space Sci, Beijing 100871, Peoples R China.
[Wang, X.; McIntosh, S. W.] Natl Ctr Atmospher Res, High Altitude Observ, Boulder, CO 80307 USA.
[Curdt, W.; Peter, H.] Max Planck Inst Sonnensyst Forsch, D-37191 Katlenburg Lindau, Germany.
[Tian, H.] Harvard Smithsonian Ctr Astrophys, Cambridge, MA 02138 USA.
[Xia, L. -D.] Shandong Univ Weihai, Sch Space Sci & Phys, Weihai 264209, Peoples R China.
RP Wang, X (reprint author), Peking Univ, Sch Earth & Space Sci, Beijing 100871, Peoples R China.
EM wangxinpku0209@gmail.com
RI Xia, Lidong/B-8836-2011
OI Xia, Lidong/0000-0001-8938-1038
FU China Scholarship Council; NSFC [41174148, 40931055, 41231069,
41222032]; NSF [ATM-0925177]; NASA [NNG06GC89G]; IRIS mission grant
[NNG08FD61C]; ASP Postdoctoral Fellow-ship Program of NCAR; National
Natural Science Foundation of China (NSFC) [40974105]; DLR; CNES; NASA;
ESA PRODEX program (Swiss contribution)
FX X. W. is supported by China Scholarship Council for her stay at HAO. X.
W. is also supported by NSFC under contract Nos. 41174148, 40931055,
41231069, and 41222032. S. W. M. and H. T. are supported by NSF
ATM-0925177 and NASA NNG06GC89G. SWM is partially supported by IRIS
mission grant NNG08FD61C. H. T. is also supported by the ASP
Postdoctoral Fellow-ship Program of NCAR. L. D. X. is supported by the
National Natural Science Foundation of China (NSFC) under contract No.
40974105. The SUMER project is financially supported by DLR, CNES, NASA,
and the ESA PRODEX program (Swiss contribution). SUMER is part of SOHO,
the Solar and Heliospheric Observatory, of ESA and NASA.
NR 60
TC 5
Z9 5
U1 0
U2 5
PU EDP SCIENCES S A
PI LES ULIS CEDEX A
PA 17, AVE DU HOGGAR, PA COURTABOEUF, BP 112, F-91944 LES ULIS CEDEX A,
FRANCE
SN 0004-6361
EI 1432-0746
J9 ASTRON ASTROPHYS
JI Astron. Astrophys.
PD SEP
PY 2013
VL 557
AR A126
DI 10.1051/0004-6361/201220197
PG 13
WC Astronomy & Astrophysics
SC Astronomy & Astrophysics
GA 228TC
UT WOS:000325211900013
ER
PT J
AU Zaninoni, E
Bernardini, MG
Margutti, R
Oates, S
Chincarini, G
AF Zaninoni, E.
Bernardini, M. G.
Margutti, R.
Oates, S.
Chincarini, G.
TI Gamma-ray burst optical light-curve zoo: comparison with X-ray
observations
SO ASTRONOMY & ASTROPHYSICS
LA English
DT Article
DE gamma-ray burst: general; radiation mechanisms: non-thermal
ID SWIFT ULTRAVIOLET/OPTICAL TELESCOPE; CONTINUOUS ENERGY INJECTION;
FOLLOW-UP OBSERVATIONS; SMALL-MAGELLANIC-CLOUD; CENTRAL ENGINE; HOST
GALAXIES; PROMPT EMISSION; MULTIWAVELENGTH OBSERVATIONS; AFTERGLOW
OBSERVATIONS; SHALLOW-DECAY
AB Aims. We present a comprehensive analysis of the optical and X-ray light curves (LCs) and spectral energy distributions (SEDs) of a large sample of gamma-ray burst (GRB) afterglows to investigate the relationship between the optical and X-ray emission after the prompt phase. We consider all data available in the literature, which where obtained with different instruments.
Methods. We collected the optical data from the literature and determined the shapes of the optical LCs. Then, using previously presented X-ray data, we modeled the optical/X-ray SEDs. We studied the SED parameter distributions and compared the optical and X-ray LC slopes and shapes.
Results. The optical and X-ray spectra become softer as a function of time while the gas-to-dust ratios of GRBs are higher than the values calculated for the Milky Way and the Large and Small Magellanic Clouds. For 20% of the GRBs the difference between the optical and X-ray slopes is consistent with 0 or 1/4 within the uncertainties (we did it not consider the steep decay phase), while in the remaining 80% the optical and X-ray afterglows show significantly different temporal behaviors. Interestingly, we find an indication that the onset of the forward shock in the optical LCs (initial peaks or shallow phases) could be linked to the presence of the X-ray flares. Indeed, when X-ray flares are present during the steep decay, the optical LC initial peak or end plateau occurs during the steep decay; if instead the X-ray flares are absent or occur during the plateau, the optical initial peak or end plateau takes place during the X-ray plateau.
Conclusions. The forward-shock model cannot explain all features of the optical (e. g. bumps, late re-brightenings) and X-ray (e. g. flares) LCs. However, the synchrotron model is a viable mechanism for GRBs at late times. In particular, we found a relationship between the presence of the X-ray flares and the shape of the optical LC that indicates a link between the prompt emission and the optical afterglow.
C1 [Zaninoni, E.; Bernardini, M. G.; Chincarini, G.] INAF Osservatorio Astron Brera, I-23807 Merate, Italy.
[Zaninoni, E.] Univ Padua, Phys & Astron Dept Galileo Galilei, I-35131 Padua, Italy.
[Margutti, R.] Harvard Smithsonian Ctr Astrophys, Cambridge, MA 02138 USA.
[Oates, S.] Univ Coll London, Mullard Space Sci Lab, Dorking RH5 6NT, Surrey, England.
[Chincarini, G.] Univ Milano Bicocca, Dip Fis G Occhialini, I-20126 Milan, Italy.
RP Zaninoni, E (reprint author), INAF Osservatorio Astron Brera, Via Bianchi 46, I-23807 Merate, Italy.
EM elena.zaninoni@brera.inaf.it
FU ASI [Swift I/011/07/0]; Ministero degli Affari Esteri [I/004/11/0];
University of Milano - Bicocca
FX We thank the anonymous referee for the helpful comments that have
improved this paper. E.Z. thanks Daniele Malesani for the useful
discussions, suggestions and support during the preparation of the
paper; Paolo D'Avanzo and Andrea Melandri for the useful advices; Thomas
Kruler for sharing the data of GRB 070802 and Fang Yuang for the data of
GRB 081008; Craig B. Markwardt for the help with the MPFIT routine. This
research has made use of the XRT Data Analysis Software (XRTDAS)
developed under the responsibility of the ASI Science Data Center
(ASDC), Italy. This work was supported by ASI grant Swift I/011/07/0 and
in part by I/004/11/0, by Ministero degli Affari Esteri and the
University of Milano - Bicocca.
NR 336
TC 12
Z9 13
U1 0
U2 4
PU EDP SCIENCES S A
PI LES ULIS CEDEX A
PA 17, AVE DU HOGGAR, PA COURTABOEUF, BP 112, F-91944 LES ULIS CEDEX A,
FRANCE
SN 1432-0746
J9 ASTRON ASTROPHYS
JI Astron. Astrophys.
PD SEP
PY 2013
VL 557
AR A12
DI 10.1051/0004-6361/201321221
PG 55
WC Astronomy & Astrophysics
SC Astronomy & Astrophysics
GA 228TC
UT WOS:000325211900044
ER
PT J
AU Sadler, PM
Coyle, H
Smith, NC
Miller, J
Mintzes, J
Tanner, K
Murray, J
AF Sadler, Philip M.
Coyle, Harold
Smith, Nancy Cook
Miller, Jaimie
Mintzes, Joel
Tanner, Kimberly
Murray, John
TI Assessing the Life Science Knowledge of Students and Teachers
Represented by the K-8 National Science Standards
SO CBE-LIFE SCIENCES EDUCATION
LA English
DT Article
ID CONCEPT INVENTORY; PROFESSIONAL-DEVELOPMENT; MODEL; MISCONCEPTIONS;
BIOLOGY
AB We report on the development of an item test bank and associated instruments based on the National Research Council (NRC) K-8 life sciences content standards. Utilizing hundreds of studies in the science education research literature on student misconceptions, we constructed 476 unique multiple-choice items that measure the degree to which test takers hold either a misconception or an accepted scientific view. Tested nationally with 30,594 students, following their study of life science, and their 353 teachers, these items reveal a range of interesting results, particularly student difficulties in mastering the NRC standards. Teachers also answered test items and demonstrated a high level of subject matter knowledge reflecting the standards of the grade level at which they teach, but exhibiting few misconceptions of their own. In addition, teachers predicted the difficulty of each item for their students and which of the wrong answers would be the most popular. Teachers were found to generally overestimate their own students' performance and to have a high level of awareness of the particular misconceptions that their students hold on the K-4 standards, but a low level of awareness of misconceptions related to the 5-8 standards.
C1 [Sadler, Philip M.; Coyle, Harold; Smith, Nancy Cook; Miller, Jaimie; Murray, John] Harvard Smithsonian Ctr Astrophys, Sci Educ Dept, Cambridge, MA 02138 USA.
[Mintzes, Joel] Calif State Univ Chico, Dept Biol Sci, Chico, CA 95929 USA.
[Tanner, Kimberly] San Francisco State Univ, San Francisco, CA 94132 USA.
RP Sadler, PM (reprint author), Harvard Smithsonian Ctr Astrophys, Sci Educ Dept, 60 Garden St, Cambridge, MA 02138 USA.
EM psadler@cfa.harvard.edu
FU NSF [NSF EHR-0830922]; NIH [NIH 1RC1HD63686-01]; University's Committee
on the Use of Human Subjects [F15916-101]; Charles Alcock of the Harvard
Smithsonian Center for Astrophysics
FX This work was carried out with support from the NSF's grant for
MOSART-LS (NSF EHR-0830922) and from the NIH's grant for ALSISE (NIH
1RC1HD63686-01). We thank those scientists who reviewed and commented on
the items in the development process. Annette Trenga handled data input
and tracking of test forms. We appreciate the advice and support of
Charles Alcock of the Harvard Smithsonian Center for Astrophysics. We
greatly appreciate the involvement of teachers and their students in
this project, without whom this research would have been impossible.
This project was conducted with the approval of Harvard University's
Committee on the Use of Human Subjects (protocol #F15916-101).
NR 78
TC 0
Z9 0
U1 0
U2 14
PU AMER SOC CELL BIOLOGY
PI BETHESDA
PA 8120 WOODMONT AVE, STE 750, BETHESDA, MD 20814-2755 USA
SN 1931-7913
J9 CBE-LIFE SCI EDUC
JI CBE-Life Sci. Educ.
PD SEP
PY 2013
VL 12
IS 3
BP 553
EP 575
DI 10.1187/cbe.12-06-0078
PG 23
WC Education, Scientific Disciplines
SC Education & Educational Research
GA 236JU
UT WOS:000325792800028
PM 24006402
ER
PT J
AU Santos-Silva, A
Komiya, Z
Nearns, EH
AF Santos-Silva, Antonio
Komiya, Ziro
Nearns, Eugenio H.
TI REVISION OF THE GENUS PRIONACALUS WHITE, 1845 (COLEOPTERA: CERAMBYCIDAE:
PRIONINAE: PRIONINI)
SO COLEOPTERISTS BULLETIN
LA English
DT Article
DE lectotype; longhorn beetles; South America; synonymy; taxonomy
AB Prionacalus White, 1845, a genus restricted to western South America from Colombia to northern Argentina, is revised. Of the 15 species currently described, seven are considered as distinct and redescribed herein. The following five new synonymies are proposed: Prionacalus gunteri Gahan, 1894 is removed from synonymy with Prionacalus buckleyi Waterhouse, 1872 and proposed as a new synonym of Prionacalus cacicus (White, 1845); Prionacalus simonsi Waterhouse, 1900 is a new synonym of Prionacalus atys White, 1850; Prionacalus giovannii Hudepohl, 1985 is a new synonym of Prionacalus whymperi Bates, 1892; Prionacalus trigonodes Bates, 1892, currently a synonym of P. buckleyi, is proposed as a new synonym of P. whymperi; and P. buckleyi is a new synonym of Prionacalus iphis White, 1850. The following earlier synonymies are accepted: Prionacalus emmae Kolbe, 1902 and Prionacalus whitei Waterhouse, 1900 are synonyms of P. buckleyi (and consequently, synonyms of P. iphis); syntype female of Psalidognathus wallisi Taschenberg, 1870 is a synonym of P. cacicus. Waterhouse (1872) is considered the author of the designation of the lectotype for Prionacalus iphis. The designation of a lectotype for P. whymperi by Quentin and Villiers is considered invalid. Lectotypes are designated for P. whymperi, P. buckleyi, and Prionacalus uniformis Waterhouse, 1900. A key to species is provided and all species are figured.
C1 [Santos-Silva, Antonio] Univ Sao Paulo, Museu Zool, BR-04218970 Sao Paulo, Brazil.
[Nearns, Eugenio H.] USDA, Smithsonian Inst, Dept Entomol, Natl Museum Nat Hist, Washington, DC 20013 USA.
RP Santos-Silva, A (reprint author), Univ Sao Paulo, Museu Zool, Caixa Postal 42-494, BR-04218970 Sao Paulo, Brazil.
EM toncriss@uol.com.br; z-com321@eurus.dti.ne.jp; gino@nearns.com
RI Museu de Zoologia da USP, MZ-USP/Q-2192-2016
NR 66
TC 0
Z9 0
U1 0
U2 0
PU COLEOPTERISTS SOC
PI ATHENS
PA UNIV GEORGIA, 413 BIOLOGICAL SCIENCES BUILDING, ATHENS, GA 30602-2603
USA
SN 0010-065X
EI 1938-4394
J9 COLEOPTS BULL
JI Coleopt. Bull.
PD SEP
PY 2013
VL 67
IS 3
BP 201
EP 240
PG 40
WC Entomology
SC Entomology
GA 235HJ
UT WOS:000325707600001
ER
PT J
AU Russell, PS
Grant, JA
Williams, KK
Carter, LM
Garry, WB
Daubar, IJ
AF Russell, Patrick S.
Grant, John A.
Williams, Kevin K.
Carter, Lynn M.
Garry, W. Brent
Daubar, Ingrid J.
TI Ground penetrating radar geologic field studies of the ejecta of
Barringer Meteorite Crater, Arizona, as a planetary analog
SO JOURNAL OF GEOPHYSICAL RESEARCH-PLANETS
LA English
DT Article
DE Impact ejecta; GPR; Meteor Crater; Size-frequency distribution; Mars;
Moon
ID SIZE-FREQUENCY DISTRIBUTIONS; MARS EXPLORATION; ELECTROMAGNETIC
PROPAGATION; MARTIAN SUBSURFACE; BRITTLE SOLIDS; FRAGMENT SIZE; LAVA
FLOWS; GPR; SCATTERING; FRACTURE
AB Ground penetrating radar (GPR) has been a useful geophysical tool in investigating a variety of shallow subsurface geological environments on Earth. Here we investigate the capabilities of GPR to provide useful geologic information in one of the most common geologic settings of planetary surfaces, impact crater ejecta. Three types of ejecta are surveyed with GPR at two wavelengths (400MHz, 200MHz) at Meteor Crater, Arizona, with the goal of capturing the GPR signature of the subsurface rock population. In order to ground truth the GPR characterization, subsurface rocks are visually counted and measured in preexisting subsurface exposures immediately adjacent to and below the GPR transect. The rock size-frequency distribution from 10 to 50cm based on visual counts is well described by both power law and exponential functions, the former slightly better, reflecting the control of fragmentation processes during the impact-ejection event. GPR counts are found to overestimate the number of subsurface rocks in the upper meter (by a factor of 2-3x) and underestimate in the second meter of depth (0.6-1.0x), results attributable to the highly scattering nature of blocky ejecta. Overturned ejecta that is fractured yet in which fragments are minimally displaced from their complement fragments produces fewer GPR returns than well-mixed ejecta. The use of two wavelengths and division of results into multiple depth zones provides multiple aspects by which to characterize the ejecta block population. Remote GPR measurement of subsurface ejecta in future planetary situations with no subsurface exposure can be used to characterize those rock populations relative to that of Meteor Crater.
C1 [Russell, Patrick S.; Grant, John A.] Smithsonian Inst, Natl Air & Space Museum, Ctr Earth & Planetary Studies, Washington, DC 20013 USA.
[Williams, Kevin K.] SUNY Buffalo State, Dept Earth Sci & Sci Educ, Buffalo, NY USA.
[Carter, Lynn M.; Garry, W. Brent] NASA, Goddard Space Flight Ctr, Greenbelt, MD 20771 USA.
[Daubar, Ingrid J.] Univ Arizona, Dept Planetary Sci, Lunar & Planetary Lab, Tucson, AZ 85721 USA.
RP Russell, PS (reprint author), Smithsonian Inst, Natl Air & Space Museum, Ctr Earth & Planetary Studies, MRC 315,POB 37012, Washington, DC 20013 USA.
EM russellp@si.edu
RI Carter, Lynn/D-2937-2012; Garry, Brent/I-5920-2013
FU NASA Lunar Science Institute [NNA09DB31A]
FX Many thanks to D. Kring, B. Andes, and the Barringer family for access
and guidance in performing research in the unique environment of Meteor
Crater. Appreciation is given for the time taken by Gwen Bart and an
anonymous reviewer for their helpful comments on the manuscript. This
research was carried out as part of the NASA Lunar Science Institute
team led by D. B. J. Bussey, Award #NNA09DB31A.
NR 79
TC 1
Z9 1
U1 0
U2 10
PU AMER GEOPHYSICAL UNION
PI WASHINGTON
PA 2000 FLORIDA AVE NW, WASHINGTON, DC 20009 USA
SN 2169-9097
EI 2169-9100
J9 J GEOPHYS RES-PLANET
JI J. Geophys. Res.-Planets
PD SEP
PY 2013
VL 118
IS 9
BP 1915
EP 1933
DI 10.1002/jgre.20145
PG 19
WC Geochemistry & Geophysics
SC Geochemistry & Geophysics
GA 234FT
UT WOS:000325628300013
ER
PT J
AU Grocholski, B
Shim, SH
Prakapenka, VB
AF Grocholski, B.
Shim, S. -H.
Prakapenka, V. B.
TI Stability, metastability, and elastic properties of a dense silica
polymorph, seifertite
SO JOURNAL OF GEOPHYSICAL RESEARCH-SOLID EARTH
LA English
DT Article
DE seifertite; silica; Shergotty meteorite; lowermost mantle
ID X-RAY-DIFFRACTION; POST-PEROVSKITE PHASE; EQUATION-OF-STATE;
LOWER-MANTLE PRESSURES; DIAMOND-ANVIL CELL; SUBDUCTED BASALTIC CRUST;
EARTHS LOWERMOST MANTLE; CRYSTAL-STRUCTURE; INDUCED TRANSFORMATIONS;
SHERGOTTY METEORITE
AB Dense silica polymorphs with sixfold coordinated Si have been found in SNC and lunar meteorites and may be important minerals for silica-rich components in the lower mantle. However, the stable crystal structure in the lower mantle and properties of dense silica remain controversial. Under stable heating and quasi-hydrostatic stress conditions, we found that the CaCl2 type undergoes a phase transition to the -PbO(2)type (seifertite) at 130-140GPa and 2500K. Our data suggest that this phase transition occurs at a greater depth than the perovskite postperovskite transition in the lowermost mantle. The molar volume measured at 1bar is the smallest among the reported silica polymorphs, therefore having the highest calculated density and in excellent agreement with recent first-principles calculations. The greater molar volume of seifertite found in the shergottite meteorite and previous experiments supports a metastable synthesis of the phase outside its stability field. Our data combined with the Hugoniots of silica polymorphs also rule out the possibility of the formation of seifertite in the meteorite within its stability field. We found very little change in bulk sound speed across the CaCl2-type seifertite transition. If shear wave velocity decreases at the transition to seifertite as suggested by some computational studies, this silica transition may provide an alternative explanation for the discontinuities with a shear wave velocity decrease found at depths greater than the Ddiscontinuity.
C1 [Grocholski, B.] Smithsonian Inst, Natl Museum Nat Hist, Dept Mineral Sci, Washington, DC 20560 USA.
[Shim, S. -H.] Arizona State Univ, Sch Earth & Space Explorat, Tempe, AZ USA.
[Prakapenka, V. B.] Univ Chicago, GeoSoilEnviroCARS, Argonne, IL USA.
RP Grocholski, B (reprint author), Smithsonian Inst, Natl Museum Nat Hist, Dept Mineral Sci, 10th & Constitut Ave, Washington, DC 20560 USA.
EM b.grocholski@gmail.com
OI Shim, Sang-Heon/0000-0001-5203-6038
FU National Science Foundation-Earth Sciences [EAR-1128799]; Department of
Energy-Geosciences [DE-FG02-94ER14466]; U. S. Department of Energy,
Office of Science, Office of Basic Energy Sciences [DE-AC02-06CH11357];
NSF [EAR1301813]; Peter Buck Fellowship at the National Museum of
Natural History, Smithsonian Institution
FX We would like to thank three anonymous reviewers for helpful suggestions
that greatly improved the manuscript. This work was performed at
GeoSoilEnviroCARS (Sector 13), Advanced Photon Source (APS), Argonne
National Laboratory. GeoSoilEnviroCARS is supported by the National
Science Foundation-Earth Sciences (EAR-1128799) and Department of
Energy-Geosciences (DE-FG02-94ER14466). Use of the Advanced Photon
Source was supported by the U. . Department of Energy, Office of
Science, Office of Basic Energy Sciences, under contract
DE-AC02-06CH11357. This work is supported by NSF to S.H.S. (EAR1301813)
with additional support to B.G. from the Peter Buck Fellowship at the
National Museum of Natural History, Smithsonian Institution.
NR 92
TC 6
Z9 6
U1 2
U2 30
PU AMER GEOPHYSICAL UNION
PI WASHINGTON
PA 2000 FLORIDA AVE NW, WASHINGTON, DC 20009 USA
SN 2169-9313
EI 2169-9356
J9 J GEOPHYS RES-SOL EA
JI J. Geophys. Res.-Solid Earth
PD SEP
PY 2013
VL 118
IS 9
BP 4745
EP 4757
DI 10.1002/jgrb.50360
PG 13
WC Geochemistry & Geophysics
SC Geochemistry & Geophysics
GA 233FP
UT WOS:000325553000005
ER
PT J
AU Cho, YS
Hu, L
Hou, HL
Lee, H
Xu, JH
Kwon, S
Oh, S
Kim, HM
Jho, S
Kim, S
Shin, YA
Kim, BC
Kim, H
Kim, CU
Luo, SJ
Johnson, WE
Koepfli, KP
Schmidt-Kuntzel, A
Turner, JA
Marker, L
Harper, C
Miller, SM
Jacobs, W
Bertola, LD
Kim, TH
Lee, S
Zhou, Q
Jung, HJ
Xu, X
Gadhvi, P
Xu, PW
Xiong, YQ
Luo, YD
Pan, SK
Gou, CY
Chu, XH
Zhang, JL
Liu, SY
He, J
Chen, Y
Yang, LF
Yang, YL
He, JJ
Liu, S
Wang, JY
Kim, CH
Kwak, H
Kim, JS
Hwang, S
Ko, J
Kim, CB
Kim, S
Bayarlkhagva, D
Paek, WK
Kim, SJ
O'Brien, SJ
Wang, J
Bhak, J
AF Cho, Yun Sung
Hu, Li
Hou, Haolong
Lee, Hang
Xu, Jiaohui
Kwon, Soowhan
Oh, Sukhun
Kim, Hak-Min
Jho, Sungwoong
Kim, Sangsoo
Shin, Young-Ah
Kim, Byung Chul
Kim, Hyunmin
Kim, Chang-uk
Luo, Shu-Jin
Johnson, Warren E.
Koepfli, Klaus-Peter
Schmidt-Kuentzel, Anne
Turner, Jason A.
Marker, Laurie
Harper, Cindy
Miller, Susan M.
Jacobs, Wilhelm
Bertola, Laura D.
Kim, Tae Hyung
Lee, Sunghoon
Zhou, Qian
Jung, Hyun-Ju
Xu, Xiao
Gadhvi, Priyvrat
Xu, Pengwei
Xiong, Yingqi
Luo, Yadan
Pan, Shengkai
Gou, Caiyun
Chu, Xiuhui
Zhang, Jilin
Liu, Sanyang
He, Jing
Chen, Ying
Yang, Linfeng
Yang, Yulan
He, Jiaju
Liu, Sha
Wang, Junyi
Kim, Chul Hong
Kwak, Hwanjong
Kim, Jong-Soo
Hwang, Seungwoo
Ko, Junsu
Kim, Chang-Bae
Kim, Sangtae
Bayarlkhagva, Damdin
Paek, Woon Kee
Kim, Seong-Jin
O'Brien, Stephen J.
Wang, Jun
Bhak, Jong
TI The tiger genome and comparative analysis with lion and snow leopard
genomes
SO NATURE COMMUNICATIONS
LA English
DT Article
ID INITIAL SEQUENCE; TASMANIAN DEVIL; HIGH-ALTITUDE; ALIGNMENT; ADAPTATION;
INSIGHTS; DATABASE; TOOL; CONSERVATION; TRANSCRIPTS
AB Tigers and their close relatives (Panthera) are some of the world's most endangered species. Here we report the de novo assembly of an Amur tiger whole-genome sequence as well as the genomic sequences of a white Bengal tiger, African lion, white African lion and snow leopard. Through comparative genetic analyses of these genomes, we find genetic signatures that may reflect molecular adaptations consistent with the big cats' hypercarnivorous diet and muscle strength. We report a snow leopard-specific genetic determinant in EGLN1 (Met39 > Lys39), which is likely to be associated with adaptation to high altitude. We also detect a TYR260G > A mutation likely responsible for the white lion coat colour. Tiger and cat genomes show similar repeat composition and an appreciably conserved synteny. Genomic data from the five big cats provide an invaluable resource for resolving easily identifiable phenotypes evident in very close, but distinct, species.
C1 [Cho, Yun Sung; Kim, Hak-Min; Jho, Sungwoong; Shin, Young-Ah; Kim, Byung Chul; Kim, Chang-uk; Lee, Sunghoon; Gadhvi, Priyvrat; Kim, Jong-Soo; Bhak, Jong] Genome Res Fdn, Personal Genom Inst, Suwon 443270, South Korea.
[Hu, Li; Hou, Haolong; Xu, Jiaohui; Zhou, Qian; Xu, Pengwei; Xiong, Yingqi; Luo, Yadan; Pan, Shengkai; Gou, Caiyun; Chu, Xiuhui; Zhang, Jilin; Liu, Sanyang; He, Jing; Chen, Ying; Yang, Linfeng; Yang, Yulan; He, Jiaju; Liu, Sha; Wang, Junyi; Wang, Jun] BGI Shenzhen, Shenzhen 518083, Peoples R China.
[Lee, Hang] Seoul Natl Univ, Tiger & Leopard Conservat Fund Korea, Seoul 151742, South Korea.
[Lee, Hang] Seoul Natl Univ, Coll Vet Med, Seoul 151742, South Korea.
[Kwon, Soowhan; Oh, Sukhun] Samsung Everland Zoo, Yongin 449715, South Korea.
[Kim, Sangsoo] Soongsil Univ, Sch Syst Biomed Sci, Seoul 156743, South Korea.
[Kim, Byung Chul; Kim, Hyunmin; Kim, Tae Hyung; Lee, Sunghoon; Jung, Hyun-Ju; Kim, Chul Hong; Kwak, Hwanjong; Ko, Junsu; Kim, Seong-Jin; Bhak, Jong] TheragenEtex, Theragen BiO Inst, Suwon 443270, South Korea.
[Luo, Shu-Jin; Xu, Xiao] Peking Univ, Sch Life Sci, Peking Tsinghua Ctr Life Sci, Beijing 100871, Peoples R China.
[Johnson, Warren E.] Smithsonian Conservat Biol Inst, Front Royal, VA 22630 USA.
[Koepfli, Klaus-Peter; O'Brien, Stephen J.] St Petersburg State Univ, Theodosius Dobzhansky Ctr Genome Bioinformat, St Petersburg 199034, Russia.
[Schmidt-Kuentzel, Anne] Cheetah Conservat Fund, Life Technol Conservat Genet Lab, Otjiwarongo 9000, Namibia.
[Turner, Jason A.] Tsau Conservancy, Global White Lion Protect Trust, ZA-1380 Limpopo, South Africa.
[Marker, Laurie] Cheetah Conservat Fund, Otjiwarongo 9000, Namibia.
[Harper, Cindy; Miller, Susan M.] Univ Pretoria, Fac Vet Sci, Vet Genet Lab, ZA-0110 Onderstepoort, South Africa.
[Miller, Susan M.] Tshwane Univ Technol, Nat Conservat Dept, ZA-0001 Pretoria, South Africa.
[Jacobs, Wilhelm] Ukutula Lodge & Lion Ctr, ZA-0250 Brits, Northwest Provi, South Africa.
[Bertola, Laura D.] Leiden Univ, Inst Environm Sci CML, NL-2300 RA Leiden, Netherlands.
[Hwang, Seungwoo] Korea Res Inst Biosci & Biotechnol, Korean Bioinformat Ctr, Taejon 305806, South Korea.
[Kim, Chang-Bae] Sangmyung Univ, Dept Life Sci, Seoul 110743, South Korea.
[Kim, Sangtae] Sungshin Womens Univ, Dept Biol, Seoul 142732, South Korea.
[Bayarlkhagva, Damdin] Natl Univ Mongolia, Sch Biol & Biotechnol, Dept Mol Biol & Genet, Ulaanbaatar 210646A, Mongol Peo Rep.
[Paek, Woon Kee] Natl Sci Museum, Taejon 305705, South Korea.
[Kim, Seong-Jin] CHA Univ, CHA Canc Inst, Seoul 135081, South Korea.
[O'Brien, Stephen J.] Nova SE Univ, Oceanog Ctr, Ft Lauderdale, FL 33004 USA.
[Wang, Jun] Univ Copenhagen, Dept Biol, DK-2200 Copenhagen, Denmark.
[Wang, Jun] King Abdulaziz Univ, Jeddah 21589, Saudi Arabia.
[Bhak, Jong] Adv Inst Convergence Technol Nano Sci & Technol, Suwon 443270, South Korea.
[Bhak, Jong] Seoul Natl Univ, Dept Transdisciplinary Studies, Program Nano Sci & Technol, Suwon 443270, South Korea.
RP O'Brien, SJ (reprint author), St Petersburg State Univ, Theodosius Dobzhansky Ctr Genome Bioinformat, St Petersburg 199034, Russia.
EM lgdchief@gmail.com; wangj@genomics.cn; jongbhak@genomics.org
RI Wang, Jun/C-8434-2016; Johnson, Warren/D-4149-2016; Kim,
Hak-Min/G-6012-2016; Wang, Jun/B-9503-2016;
OI Cho, Yun Sung/0000-0003-4490-8769; Wang, Jun/0000-0002-8540-8931;
Bertola, Laura/0000-0002-3445-0355; Johnson, Warren/0000-0002-5954-186X;
Kim, Hak-Min/0000-0001-6066-2469; Zhang, Jilin/0000-0002-9976-1605;
O'Brien, Stephen J./0000-0001-7353-8301; Wang, Jun/0000-0002-2113-5874;
Hou, Haolong/0000-0002-3870-7226
FU Industrial Strategic Technology Development Program [10040231]; Ministry
of Knowledge Economy (MKE, Korea); National Research Foundation of Korea
[NRF-2011-0019745]; Ministry of Science, ICT & Future Planning (MSIP),
Republic of Korea [2012R1A1A2043851, NRF-2008-2004707]; Russian Ministry
of Science Mega-grant [11.G34.31.0068]
FX This work was supported by the Industrial Strategic Technology
Development Program, 10040231, 'Bioinformatics platform development for
next generation bioinformation analysis' funded by the Ministry of
Knowledge Economy (MKE, Korea). This work was partly supported by the
National Research Foundation of Korea (NRF-2011-0019745) and grants from
the Ministry of Science, ICT & Future Planning (MSIP), Republic of Korea
(2012R1A1A2043851 and NRF-2008-2004707). This research was also
supported in part by Russian Ministry of Science Mega-grant
no.11.G34.31.0068; SJ O'Brien Principal Investigator. Scaffolds
(sequence data) and gene sets are available at http://tigergenome.org.
We thank Dr Rui-Qiang Li for contributing to the manuscript. We thank
Maryana Bhak for editing. Authors thank many people not listed as
authors who gave us feedback, samples and encouragement, especially
Won-shik Min. This project was initiated with the generous support of
TheragenEtex, Seong-Jin Kim and Jin-Up Goh. We thank the following
people and organization for providing valuable samples, data and time
for this project: Johannesburg Zoo, in particular Director Dominic Moss
for pedigree information and permission to use samples, Janine Fearon
and Lucia Muuhlu for laboratory work done at the Life Technologies
Conservation Genetics Laboratory of the Cheetah Conservation Fund,
Ukutula Lodge & Lion Centre, Global White Lion Protection Trust and Tsau
Conservancy, Bhagavan "Doc" Antle from Tiger's Preserve, Myrtle Beach,
and Ouwehands Dierenpark for contributing to this project with their
lion population, Dr Carlos Driscoll for making one control sample
(PLE171) available to this project, and Life Technologies and Biomatters
for generous support with software (Life Technologies and Geneious) and
equipment (Life Technologies) of the Genetics Laboratory at the Cheetah
Conservation Fund. Finally, we thank the many conservationists who have
helped protect endangered big cats throughout the world.
NR 50
TC 51
Z9 57
U1 22
U2 162
PU NATURE PUBLISHING GROUP
PI LONDON
PA MACMILLAN BUILDING, 4 CRINAN ST, LONDON N1 9XW, ENGLAND
SN 2041-1723
J9 NAT COMMUN
JI Nat. Commun.
PD SEP
PY 2013
VL 4
AR 2433
DI 10.1038/ncomms3433
PG 7
WC Multidisciplinary Sciences
SC Science & Technology - Other Topics
GA 232ZM
UT WOS:000325533700030
PM 24045858
ER
PT J
AU Ross, CN
Power, ML
Artavia, JM
Tardif, SD
AF Ross, Corinna N.
Power, Michael L.
Artavia, Joselyn M.
Tardif, Suzette D.
TI Relation of Food Intake Behaviors and Obesity Development in Young
Common Marmoset Monkeys
SO OBESITY
LA English
DT Article
ID LOW-INCOME MOTHERS; CALLITHRIX-JACCHUS; GROWTH; CHILDREN; CHILDHOOD;
NUTRITION; PRIMATE; RISK; PREVENTION; ORIGINS
AB Objective: Increasing prevalence of childhood obesity and associated risks of adult type disease have led to worldwide concern. It remains unclear how genetic predisposition, environmental exposure to obesogenic food, and developmental programming interact to lead to overweight and obese children. The development of a nonhuman primate model of obesity, and particularly juvenile obesity, is an important step to elucidating the factors associated with obesity and evaluating intervention strategies.
Design and Methods: Infant marmosets were followed from birth to 12 months of age. Feeding phenotypes were determined through the use of behavioral observation, solid food intake trials, and liquid feeding trials monitored via lickometer.
Results: Marmosets found to be obese at 12 months of age (more than 14%body fat) start consuming solid food sooner and initiate more time off of care givers. These individuals developed stable feeding phenotypes that included being more efficient consumers during liquid intake trials, drinking more grams of diet per contact with the licksit.
Conclusions: The weaning process appears to be particularly important in the development of feeding phenotypes and the development of juvenile obesity for the marmosets, and thus this is the time that should be focused upon for intervention testing in both nonhuman primates and children.
C1 [Ross, Corinna N.; Artavia, Joselyn M.; Tardif, Suzette D.] Univ Texas Hlth Sci Ctr San Antonio, Dept Cellular & Struct Biol, Barshop Inst Longev & Aging, San Antonio, TX USA.
[Power, Michael L.] Smithsonian Conservat Biol Inst, Nutr Lab, Conservat Ecol Ctr, Natl Zool Pk, Washington, DC USA.
[Power, Michael L.] Amer Coll Obstetricians & Gynecologists, Res Dept, Washington, DC 20024 USA.
RP Ross, CN (reprint author), Univ Texas Hlth Sci Ctr San Antonio, Dept Cellular & Struct Biol, Barshop Inst Longev & Aging, San Antonio, TX USA.
EM rossc4@uthscsa.edu
OI Power, Michael/0000-0002-6120-3528
FU NIH [R01 DK077639]
FX This study was supported by a grant from NIH: R01 DK077639.
NR 39
TC 6
Z9 6
U1 2
U2 16
PU WILEY-BLACKWELL
PI HOBOKEN
PA 111 RIVER ST, HOBOKEN 07030-5774, NJ USA
SN 1930-7381
EI 1930-739X
J9 OBESITY
JI Obesity
PD SEP
PY 2013
VL 21
IS 9
BP 1891
EP 1899
DI 10.1002/oby.20432
PG 9
WC Endocrinology & Metabolism; Nutrition & Dietetics
SC Endocrinology & Metabolism; Nutrition & Dietetics
GA 231ON
UT WOS:000325426600050
PM 23512878
ER
PT J
AU Carvalho, MR
Wilf, P
Hermsen, EJ
Gandolfo, MA
Cuneo, NR
Johnson, KR
AF Carvalho, Monica R.
Wilf, Peter
Hermsen, Elizabeth J.
Gandolfo, Maria A.
Ruben Cuneo, N.
Johnson, Kirk R.
TI FIRST RECORD OF TODEA (OSMUNDACEAE) IN SOUTH AMERICA, FROM THE EARLY
EOCENE PALEORAINFORESTS OF LAGUNA DEL HUNCO (PATAGONIA, ARGENTINA)
SO AMERICAN JOURNAL OF BOTANY
LA English
DT Article
DE biogeography; fossil; Gondwana; Laguna del Hunco; Osmundaceae;
phylogeny; Todea; Todites
ID WESTERN NORTH-AMERICA; MIDDLE TRIASSIC FLORA; ADDITIONAL EVIDENCE;
MACROFOSSIL RECORD; FERNS CLADOPHLEBIS; LIVINGSTON ISLAND; PLANT
DIVERSITY; EXTANT FERNS; NEW-ZEALAND; BOTANY BAY
AB Premise of the Study: The early Eocene Laguna del Hunco caldera-lake paleoflora (ca. 52 Ma) from Chubut Province, Argentina, is notably diverse and includes many conifer and angiosperm lineages that are extinct in South America but extant in Australasian rainforests. No ferns have been previously described from Laguna del Hunco. We describe and interpret a new species of fossil Osmundaceae based on fertile and sterile pinnae.
Methods: The fossil specimens were compared with other extant and fossil Osmundaceae based on living and herbarium material and published descriptions. A morphological matrix based on 29 characters was constructed for 17 living species in Osmundaceae, four species assigned to the fossil genus Todites, and the new fossil species. Phylogenetic analyses were conducted under parsimony using morphology and total evidence matrices.
Key Results: Both the new fossil and the Todites species were consistently resolved within the leptopteroid clade of Osmundaceae, and the new species resolved in a clade with the two living Todea species, which are now restricted to Australia, New Guinea, New Zealand, and southern Africa.
Conclusions: Todea amissa sp. nov. is the first record of Todea, living or fossil, in South America and only the second fossil record worldwide. The distribution of extant Todea on Gondwanan continents other than South America is broadly shared with other taxa from Laguna del Hunco, further indicating that a large component of this flora represents a Gondwanic biome that is no longer found on the South American continent.
C1 [Carvalho, Monica R.; Gandolfo, Maria A.] Cornell Univ, Dept Plant Biol, LH Bailey Hortorium, Ithaca, NY 14850 USA.
[Carvalho, Monica R.; Wilf, Peter] Penn State Univ, Dept Geosci, University Pk, PA 16802 USA.
[Hermsen, Elizabeth J.] Ohio Univ, Dept Environm & Plant Biol, Athens, OH 45701 USA.
[Ruben Cuneo, N.] Consejo Nacl Invest Cient & Tecn, Museo Paleontol Egidio Feruglio, RA-9100 Trelew, Chubut, Argentina.
[Johnson, Kirk R.] Smithsonian Inst, Natl Museum Nat Hist, Washington, DC 20013 USA.
RP Carvalho, MR (reprint author), Cornell Univ, Dept Plant Biol, LH Bailey Hortorium, Ithaca, NY 14850 USA.
EM mjr383@cornell.edu
FU Schlumberger Faculty for the Future Foundation; National Science
Foundation [DEB-0919071, DEB-0918932, DEB-0345750]; David and Lucile
Packard Foundation; National Geographic Society [7337-02]; University of
Pennsylvania Research Foundation; Andrew W. Mellon Foundation
FX The authors thank staff from the Museo Paleontologico Egidio Feruglio,
especially M. Caffa, L. Canessa, P. Puerta, L. Reiner, and E. Ruigomez,
for field-collection and sample-processing efforts; S. Wing, A.
Iglesias, C. Gonzalez, B. Cariglino, R. Horwitt, and the IOPC 2004 field
trip for additional collection assistance; E. Ruigomez and A. Iglesias
for arduous efforts to obtain international loans; and R. Kooyman for
taking M. R. C. and P. W. to the Border Ranges, New South Wales,
Australia. M. R. C. thanks the staffs of CANB (B. Lepschi and C.
Cargill), NSW (D. Dixon), A (E. Wood), and BH (A. Stalter), two
anonymous reviewers, and G. Jordan, R. Carpenter, G. Lim, S. Gunner, and
S. Kiuhan for providing comments; F. Herrera for help with the figures;
and the Schlumberger Faculty for the Future Foundation for financial
support. This project received funding from National Science Foundation
(grants DEB-0919071, DEB-0918932, and DEB-0345750 to P. W., M. A. G.,
and N.R.C.) and the David and Lucile Packard Foundation (to P. W.), as
well as early support from National Geographic Society grant 7337-02,
the University of Pennsylvania Research Foundation, and the Andrew W.
Mellon Foundation (to P.W.).
NR 129
TC 15
Z9 16
U1 3
U2 13
PU BOTANICAL SOC AMER INC
PI ST LOUIS
PA PO BOX 299, ST LOUIS, MO 63166-0299 USA
SN 0002-9122
J9 AM J BOT
JI Am. J. Bot.
PD SEP
PY 2013
VL 100
IS 9
BP 1831
EP 1848
DI 10.3732/ajb.1200637
PG 18
WC Plant Sciences
SC Plant Sciences
GA 228HK
UT WOS:000325176400014
PM 24018858
ER
PT J
AU Manchester, SR
Kapgate, DK
Wen, J
AF Manchester, Steven R.
Kapgate, Dashrath K.
Wen, Jun
TI OLDEST FRUITS OF THE GRAPE FAMILY (VITACEAE) FROM THE LATE CRETACEOUS
DECCAN CHERTS OF INDIA
SO AMERICAN JOURNAL OF BOTANY
LA English
DT Article
DE Deccan; fruits; grapes; Indovitis; Maastrichtian; seeds; Leeoxylon;
Vitaceae
ID INTERTRAPPEAN BEDS; PHYLOGENETIC ANALYSIS; INTERCONTINENTAL
DISJUNCTIONS; SEED MORPHOLOGY; GENE-SEQUENCES; LATE EOCENE;
DIPTEROCARPACEAE; CRYPTERONIACEAE; BIOGEOGRAPHY; AMPELOCISSUS
AB Premise of the study: Despite the inferred Cretaceous origin of the Vitaceae, fossils of the grape family are relatively young, with the oldest previously known examples limited to the Paleocene of Europe and North America. New fossil evidence indicates that the family was already present in India in the Late Cretaceous (Maastrichtian), about 10-15 million years before the tectonic collision of India with Eurasia.
Methods: Fruits and seeds were investigated by serial sections and peels of chert from the Deccan Intertrappean beds of central India, and compared anatomically with those of extant genera.
Key results: Indovitis chitaleyae gen. et sp. n. is described based on immature fruits bearing four to six seeds, and isolated mature seeds. The seeds possess paired ventral infolds and a dorsal chalaza, features diagnostic of the order Vitales. Characters of chalaza shape, infold morphology, and seed coat anatomy place I. chitaleyae within Vitaceae and favor a phylogenetic position either sister to the Vitis-Ampelocissus clade or sister to the Ampelopsis-Clematicissus-Rhoicissus clade.
Conclusions: Presence of the oldest known vitaceous fossils in the latest Cretaceous of India indicates a previously undocumented Gondwanan history and a possible southern hemisphere origin for the Vitales. An "out-of-India" scenario might explain the relatively sudden appearance of diverse Vitaceae in the Late Paleocene and Early Eocene of the Northern Hemisphere.
C1 [Manchester, Steven R.] Univ Florida, Florida Museum Nat Hist, Gainesville, FL 32611 USA.
[Kapgate, Dashrath K.] JM Patel Coll, Dept Bot, Bhandara 441904, MS, India.
[Wen, Jun] Smithsonian Inst, Dept Bot, Natl Museum Nat Hist, MRC166, Washington, DC 20013 USA.
RP Manchester, SR (reprint author), Univ Florida, Florida Museum Nat Hist, Gainesville, FL 32611 USA.
EM steven@ufl.edu
FU National Science Foundation [DEB 0743474]
FX The authors thank N. R. Sangrame, M. H. Wanjari, and R. W. Ukey for
helpful field and laboratory assistance. Images of extant Vitaceae were
made available by Iju Chen. Jonathon Bloch provided access to a computer
workstation running Avizo software, Selena Smith and Terry Lott provided
assistance and advice for the 3-D visualization and virtual sectioning
methodology. Specimens from the Cleveland Museum of Natural History were
loaned through the courtesy of Carole Camillo and the late Shyamala
Chitaley, and Hongshan Wang assisted with curation of specimens
deposited at the Florida Museum of Natural History. Helpful review
comments were provided by Susana Magallon, Steffi Ickert-Bond, and Bruce
Tiffney. This research was funded by National Science Foundation grant
DEB 0743474 to S. R. Manchester and J. Wen.
NR 50
TC 7
Z9 8
U1 1
U2 15
PU BOTANICAL SOC AMER INC
PI ST LOUIS
PA PO BOX 299, ST LOUIS, MO 63166-0299 USA
SN 0002-9122
J9 AM J BOT
JI Am. J. Bot.
PD SEP
PY 2013
VL 100
IS 9
BP 1849
EP 1859
DI 10.3732/ajb.1300008
PG 11
WC Plant Sciences
SC Plant Sciences
GA 228HK
UT WOS:000325176400015
PM 24036414
ER
PT J
AU Collin, R
Starr, MJ
AF Collin, Rachel
Starr, Matthew J.
TI Comparative Ontogenetic Changes in Enzyme Activity During Embryonic
Development of Calyptraeid Gastropods
SO BIOLOGICAL BULLETIN
LA English
DT Article
ID TEMPERATURE-MEDIATED PLASTICITY; DIGESTIVE ENZYMES;
MARINE-INVERTEBRATES; CREPIDULA-FORNICATA; CRASSOSTREA-GIGAS;
SUSPENSION-FEEDERS; LARVAL DEVELOPMENT; HATCHING SIZE; EGG SIZE;
EVOLUTION
AB A modification of a semi-quantitative color-based enzyme assay was used to quantify the activity of 19 enzymes (5 peptidases, 3 lipases, 3 phosphotases, and 8 carbohydrases) during five stages of development in eight species of calyptraeid gastropods. Sixteen of the 19 enzymes showed a significant effect of mode of development on the concentration of the reaction product after incubation of homogenates standardized for protein content. The overall pattern was that planktotrophs showed the highest activities, followed by adelphophages, and nonfeeding embryos, which had the lowest enzyme activities. Thirteen enzymes showed significant differences across developmental stages. Of these, eight showed a clear increase during development. Only one of the enzymes showed a sudden jump in activity between the unfed, pre-hatching stage and post-hatching stages that were fed Isochrysis galbana. In three cases, ANOVA identified two exclusive, significantly different groups of species. In naphthol-AS-BI-phosphohydrolase, the measured absorbance of Crucibulum spinosum samples was significantly higher than in all of the other species. The activity of alpha-fucosidase in Crepipatella occulta was significantly greater than in the other seven species. Finally, the activity of beta-galactosidase was significantly higher in C. occulta, Crucibulum spinosum, and Bostrycapulus calyptraeformis than in the four Crepidula species. This is the only enzyme for which there is an indication of a phylogenetic effect. Relative enzyme activities were similar to those reported for other herbivorous gastropods, with the three phosphohydrolases, four carbohydrases (beta-galactosidase, beta-glucuronidase, N-acetyl-beta-glucosaminidase, and alpha-fucosidase), and leucine arylamidase showing high activities.
C1 [Collin, Rachel; Starr, Matthew J.] Smithsonian Trop Res Inst, Balboa, Ancon, Panama.
[Starr, Matthew J.] Univ Louisiana Lafayette, Dept Biol, Lafayette, LA 70504 USA.
RP Collin, R (reprint author), Smithsonian Trop Res Inst, Apartado Postal 0843-03092, Balboa, Ancon, Panama.
EM collinr@si.edu
OI Collin, Rachel/0000-0001-5103-4460
FU United States National Science Foundation [IOS-1019727]
FX We thank members of the Collin Lab for help in the laboratory and field;
the staff of the Smithsonian Marine Station who provided logistic
support in Florida; and the government of Panama, which issued
collecting and import permits. This is Smithsonian Marine Station at
Fort Pierce, Florida, Contribution No. 922. This work was supported by a
United States National Science Foundation grant IOS-1019727 to RC.
NR 45
TC 2
Z9 2
U1 1
U2 9
PU MARINE BIOLOGICAL LABORATORY
PI WOODS HOLE
PA 7 MBL ST, WOODS HOLE, MA 02543 USA
SN 0006-3185
J9 BIOL BULL-US
JI Biol. Bull.
PD SEP
PY 2013
VL 225
IS 1
BP 8
EP 17
PG 10
WC Biology; Marine & Freshwater Biology
SC Life Sciences & Biomedicine - Other Topics; Marine & Freshwater Biology
GA 227CK
UT WOS:000325085600002
PM 24088792
ER
PT J
AU He, FL
Hubbell, S
AF He, Fangliang
Hubbell, Stephen
TI Estimating extinction from species-area relationships: why the numbers
do not add up
SO ECOLOGY
LA English
DT Article
DE conservation biology; endemics-area relationship; extinction; Pasoh
Nature Reserve; Malaysia; power-law model; species-area relationships
(SAR)
ID CONSERVATION OPPORTUNITY; BRAZILIAN AMAZON; SCALE DEPENDENCE; DIVERSITY;
BIODIVERSITY; PATTERNS; IMPACTS; WINDOWS; FOREST; DEBT
AB Researchers commonly use species-area relationships (SAR) to estimate extinction rates caused by habitat loss by reversing the SAR, extrapolating backward from area to calculate expected species loss. We have previously shown that the backward SAR method considerably overestimates extinction rates due to a previously unrecognized sampling artifact. Jacob Bock Axelsen, Uri Roll, Lewi Stone, and Andrew Solow recently argued that the backward SAR method is correct and the method does not overestimate extinction rates. In this paper, we further elaborate and clarify our previous results. We show that the backward SAR method gives the correct extinction rate only under a strict complementary-area sampling design, which is not used in practice because it requires knowing which species are endemic to the area of destroyed habitat, or the number of species in the complementary area. Because of this problem, researchers substitute a power-law model for the SAR in the backward SAR equation. However, this substitution violates the backward SAR method's requirement for complementary sampling. With this model substitution, the backward SAR equation is no longer correct, except in the special case of randomly distributed species. For the complementary sampling or random distribution of species, the first individual of a species to be encountered and the last individual to be encountered to lose the species are exchangeable (or the same individual). But this is not the case for other sampling designs or if species are not randomly distributed and explains why the backward SAR method fails to correctly estimate extinction rates. Our proofs and results are general and explain the widely recognized overestimation of extinction by the backward SAR method. We suggest future directions for developing general theory for estimating species extinction from species-area relationships. Until then, however, the backward SAR method should not be used to estimate species extinction in practice.
C1 [He, Fangliang] Sun Yat Sen Univ, State Key Lab Biocontrol, SYSU Alberta Joint Lab Biodivers Conservat, Guangzhou 510275, Guangdong, Peoples R China.
[He, Fangliang] Sun Yat Sen Univ, Sch Life Sci, Guangzhou 510275, Guangdong, Peoples R China.
[He, Fangliang] Univ Alberta, Dept Renewable Resources, Edmonton, AB T6G 2H1, Canada.
[Hubbell, Stephen] Univ Calif Los Angeles, Dept Ecol & Evolutionary Biol, Los Angeles, CA 90095 USA.
[Hubbell, Stephen] Smithsonian Trop Res Inst, Ctr Trop Forest Sci, Unit 0948, Apo Aa 340020948, Panama.
RP He, FL (reprint author), Sun Yat Sen Univ, State Key Lab Biocontrol, SYSU Alberta Joint Lab Biodivers Conservat, Guangzhou 510275, Guangdong, Peoples R China.
EM fhe@ualberta.ca
FU Sun Yat-sen University; Natural Sciences and Engineering Research
Council (Canada); NASA (National Aeronautics and Space Administration);
U.S. National Science Foundation
FX We thank the authors of Axelsen et al. (2013) for their contribution to
the discussion of this topic, which has given us the opportunity to
clarify the exact meaning of our theoretical findings on species-area
relationships and extinction. This work was supported by Sun Yat-sen
University, the Natural Sciences and Engineering Research Council
(Canada), NASA (National Aeronautics and Space Administration), and the
U.S. National Science Foundation.
NR 26
TC 8
Z9 8
U1 5
U2 78
PU ECOLOGICAL SOC AMER
PI WASHINGTON
PA 1990 M STREET NW, STE 700, WASHINGTON, DC 20036 USA
SN 0012-9658
EI 1939-9170
J9 ECOLOGY
JI Ecology
PD SEP
PY 2013
VL 94
IS 9
BP 1905
EP 1912
DI 10.1890/12-1795.1
PG 8
WC Ecology
SC Environmental Sciences & Ecology
GA 219TL
UT WOS:000324532900003
PM 24279261
ER
PT J
AU Hubbell, SP
AF Hubbell, Stephen P.
TI Tropical rain forest conservation and the twin challenges of diversity
and rarity
SO ECOLOGY AND EVOLUTION
LA English
DT Article
DE tropical forest conservation; tropical tree rarity
ID NEUTRAL THEORY; DISTRIBUTIONS; PATTERNS; SYSTEMS; FUTURE; AMAZON; MODEL
AB Data from a global network of large, permanent plots in lowland tropical forests demonstrate (1) that the phenomenon of tropical tree rarity is real and (2) that almost all the species diversity in such forests is due to rare species. Theoretical and empirically based reasoning suggests that many of these rare species are not as geographically widespread as previously thought. These findings suggest that successful strategies for conserving global tree diversity in lowland tropical forests must pay much more attention to the biogeography of rarity, as well as to the impact of climate change on the distribution and abundance of rare species. Because the biogeography of many tropical tree species is poorly known, a high priority should be given to documenting the distribution and abundance of rare tropical tree species, particularly in Amazonia, the largest remaining tropical forested region in the world.
C1 [Hubbell, Stephen P.] Univ Calif Los Angeles, Dept Ecol & Evolutionary Biol, Los Angeles, CA 90095 USA.
[Hubbell, Stephen P.] Smithsonian Trop Res Inst, Ctr Trop Forest Sci, Washington, DC 20521 USA.
RP Hubbell, SP (reprint author), Univ Calif Los Angeles, Dept Ecol & Evolutionary Biol, Los Angeles, CA 90095 USA.
EM shubbell@eeb.ucla.edu
FU National Science Foundation [DEB-0640386, DEB-0425651, DEB-0346488,
DEB-0129874, DEB-00753102, DEB-9909347, DEB-9615226, DEB-9405933,
DEB-9221033, DEB-9100058, DEB-8906869, DEB-8605042, DEB-8206992,
DEB-7922197]
FX The BCI portion of this research was made possible by National Science
Foundation grants to Stephen P. Hubbell: DEB-0640386, DEB-0425651,
DEB-0346488, DEB-0129874, DEB-00753102, DEB-9909347, DEB-9615226,
DEB-9615226, DEB-9405933, DEB-9221033, DEB-9100058, DEB-8906869,
DEB-8605042, DEB-8206992, and DEB-7922197.
NR 25
TC 9
Z9 10
U1 3
U2 46
PU WILEY-BLACKWELL
PI HOBOKEN
PA 111 RIVER ST, HOBOKEN 07030-5774, NJ USA
SN 2045-7758
J9 ECOL EVOL
JI Ecol. Evol.
PD SEP
PY 2013
VL 3
IS 10
BP 3263
EP 3274
DI 10.1002/ece3.705
PG 12
WC Ecology; Evolutionary Biology
SC Environmental Sciences & Ecology; Evolutionary Biology
GA 224ZR
UT WOS:000324932600006
PM 24223266
ER
PT J
AU Lyson, TR
Bhullar, BAS
Bever, GS
Joyce, WG
de Queiroz, K
Abzhanov, A
Gauthier, JA
AF Lyson, Tyler R.
Bhullar, Bhart-Anjan S.
Bever, Gabe S.
Joyce, Walter G.
de Queiroz, Kevin
Abzhanov, Arhat
Gauthier, Jacques A.
TI Homology of the enigmatic nuchal bone reveals novel reorganization of
the shoulder girdle in the evolution of the turtle shell
SO EVOLUTION & DEVELOPMENT
LA English
DT Article
ID PHYLOGENETIC-RELATIONSHIPS; AMNIOTE PHYLOGENY; SISTER GROUP; FOSSILS;
POSITION; ORIGIN; INTERRELATIONSHIPS; KAYENTACHELYS; TRIONYCHIDAE;
MUSCULATURE
AB The turtle shell represents a unique modification of the ancestral tetrapod body plan. The homologies of its approximately 50 bones have been the subject of debate for more than 200 years. Although most of those homologies are now firmly established, the evolutionary origin of the dorsal median nuchal bone of the carapace remains unresolved. We propose a novel hypothesis in which the nuchal is derived from the paired, laterally positioned cleithradorsal elements of the ancestral tetrapod pectoral girdle that are otherwise retained among extant tetrapods only in frogs. This hypothesis is supported by origin of the nuchal as paired, mesenchymal condensations likely derived from the neural crest followed by a unique two-stage pattern of ossification. Further support is drawn from the establishment of the nuchal as part of a highly conserved muscle scaffold wherein the cleithrum (and its evolutionary derivatives) serves as the origin of the Musculus trapezius. Identification of the nuchal as fused cleithra is congruent with its general spatial relationships to other elements of the shoulder girdle in the adult morphology of extant turtles, and it is further supported by patterns of connectivity and transformations documented by critical fossils from the turtle stem group. The cleithral derivation of the nuchal implies an anatomical reorganization of the pectoral girdle in which the dermal portion of the girdle was transformed from a continuous lateral-ventral arc into separate dorsal and ventral components. This transformation involved the reduction and eventual loss of the scapular rami of the clavicles along with the dorsal and superficial migration of the cleithra, which then fused with one another and became incorporated into the carapace.
C1 [Lyson, Tyler R.; Bhullar, Bhart-Anjan S.; Bever, Gabe S.; Gauthier, Jacques A.] Yale Univ, Dept Geol & Geophys, New Haven, CT 06511 USA.
[Bhullar, Bhart-Anjan S.; Abzhanov, Arhat] Harvard Univ, Dept Organism & Evolutionary Biol, Cambridge, MA 02138 USA.
[Bever, Gabe S.] Coll Osteopath Med, New York Inst Technol, Dept Anat, New York, NY USA.
[Bever, Gabe S.] Amer Museum Nat Hist, Div Paleontol, New York, NY 10024 USA.
[Joyce, Walter G.] Univ Tubingen, Dept Geosci, D-72074 Tubingen, Germany.
[Lyson, Tyler R.; Joyce, Walter G.; Gauthier, Jacques A.] Yale Peabody Museum Nat Hist, Div Vertebrate Paleontol, New Haven, CT 06511 USA.
[Lyson, Tyler R.; de Queiroz, Kevin] Smithsonian Inst, Natl Museum Nat Hist, Dept Vertebrate Zool, Washington, DC 20560 USA.
RP Lyson, TR (reprint author), Yale Univ, Dept Geol & Geophys, POB 6666, New Haven, CT 06511 USA.
EM tyler.lyson@gmail.com
FU YPM's Divisions of Vertebrate Zoology and Vertebrate Paleontology; NSF
Graduate Research Fellowship; NSF grant [EF 0334966]; Yale Institute for
Biospheric Studies
FX We thank the following people for access to material under their care:
B. de Klerk (AM), L. Chun (IVPP), J. Neveling (M), F. Jenkins (MCZ), J.
Gillette (MNA), J. Botha-Brink (NMQR), R. Smith (SAM), R. Schoch (SMNS),
T. Rowe (TMM), K. Padian (UCMP), R. McDiarmid (USNM), and G. Zug (USNM).
G. Watkins-Colwell (YPM) is thanked for assistance with the dissections.
T. Scheyer (UZ) provided photos used in Figure 2. Funding for this
project was provided by YPM's Divisions of Vertebrate Zoology and
Vertebrate Paleontology, NSF Graduate Research Fellowship, NSF grant EF
0334966 "Deep Scaly: Assembling a Tree of Life for Squamata" and the
Yale Institute for Biospheric Studies.
NR 75
TC 24
Z9 24
U1 2
U2 33
PU WILEY-BLACKWELL
PI HOBOKEN
PA 111 RIVER ST, HOBOKEN 07030-5774, NJ USA
SN 1520-541X
J9 EVOL DEV
JI Evol. Dev.
PD SEP
PY 2013
VL 15
IS 5
BP 317
EP 325
DI 10.1111/ede.12041
PG 9
WC Evolutionary Biology; Developmental Biology; Genetics & Heredity
SC Evolutionary Biology; Developmental Biology; Genetics & Heredity
GA 226DF
UT WOS:000325013900001
PM 24074278
ER
PT J
AU Sofaer, HR
Chapman, PL
Sillett, TS
Ghalambor, CK
AF Sofaer, Helen R.
Chapman, Phillip L.
Sillett, T. Scott
Ghalambor, Cameron K.
TI Advantages of nonlinear mixed models for fitting avian growth curves
SO JOURNAL OF AVIAN BIOLOGY
LA English
DT Article
ID SIBLING COMPETITION; NESTLING GROWTH; HATCHING ASYNCHRONY; ALTRICIAL
BIRDS; FLEDGING SUCCESS; TREE SWALLOWS; CHICK GROWTH; HOUSE FINCH;
CLUTCH SIZE; RATES
AB Our understanding of avian growth rates can benefit from the use of two statistical approaches that explicitly model the sources of intraspecific variation. First, random effects can evaluate whether there are consistent differences between individuals and groups of siblings within a population, and also account for any lack of statistical independence among data points. Second, nonlinear fixed-effect functions can be extended to test specific biological hypotheses of interest, such as for differences between groups or populations. We illustrate the advantages of these methods by using nonlinear mixed models to study variation in the growth trajectories of nestling orange-crowned warblers Oreothylpis celata. Specifically, we quantify the sources of variation within populations, analyze the effects of asynchronous hatching, and test for a difference in the growth rates of populations in Alaska and California, which are at the northern and southern limits of the species' breeding distribution. We found that growth rates did not consistently vary between nests and individuals within populations and were not affected by asynchronous hatching, but were higher in Alaska than in California. Our extensions of traditional methods allowed us to accurately quantify this difference between populations, which is consistent with life history theory but has rarely been demonstrated in previous comparisons of intraspecific passerine populations. The methods we present can be applied to any taxonomic group and adjusted to fit any nonlinear function, and we provide code and implementation advice to facilitate the use of this analytical framework in future studies.
C1 [Sofaer, Helen R.; Ghalambor, Cameron K.] Colorado State Univ, Grad Degree Program Ecol, Ft Collins, CO 80523 USA.
[Sofaer, Helen R.; Ghalambor, Cameron K.] Colorado State Univ, Dept Biol, Ft Collins, CO 80523 USA.
[Chapman, Phillip L.] Colorado State Univ, Dept Stat, Ft Collins, CO 80523 USA.
[Sillett, T. Scott] Natl Zool Pk, Migratory Bird Ctr, Smithsonian Conservat Biol Inst, Washington, DC 20013 USA.
RP Sofaer, HR (reprint author), Colorado State Univ, Grad Degree Program Ecol, Ft Collins, CO 80523 USA.
EM helen@lamar.colostate.edu
FU Nature Conservancy; Smithsonian Instit.; American Ornithologists' Union
Graduate Research Award; Frank M. Chapman Memorial Grant from the
American Museum of Natural History; NSF-IGERT Grant DGE [0221595]; NSF
Grant DEB [0846175]
FX Our research was supported by the The Nature Conservancy, the
Smithsonian Instit., an American Ornithologists' Union Graduate Research
Award, and a Frank M. Chapman Memorial Grant from the American Museum of
Natural History. HRS was supported by NSF-IGERT Grant DGE-#0221595
(administered by the PRIMES program at Colorado State Univ.) and NSF
Grant DEB-#0846175 to CKG. The Catalina Island Conservancy provided
logistical support. We thank users of the R mixed effect models message
board for advice. Comments from B. R. Noon, K. M. Pepin, and C. T. Webb
improved the manuscript.
NR 70
TC 11
Z9 12
U1 3
U2 44
PU WILEY-BLACKWELL
PI HOBOKEN
PA 111 RIVER ST, HOBOKEN 07030-5774, NJ USA
SN 0908-8857
J9 J AVIAN BIOL
JI J. Avian Biol.
PD SEP
PY 2013
VL 44
IS 5
BP 469
EP 478
DI 10.1111/j.1600-048X.2013.05719.x
PG 10
WC Ornithology
SC Zoology
GA 226AG
UT WOS:000325005900007
ER
PT J
AU McKellar, AE
Marra, PP
Ratcliffe, LM
AF McKellar, Ann E.
Marra, Peter P.
Ratcliffe, Laurene M.
TI Starting over: experimental effects of breeding delay on reproductive
success in early-arriving male American redstarts
SO JOURNAL OF AVIAN BIOLOGY
LA English
DT Article
ID FLYCATCHER FICEDULA-HYPOLEUCA; PENGUIN PYGOSCELIS ANTARCTICA; MIGRATORY
BIRD; MATE CHOICE; PARENTAL QUALITY; PIED FLYCATCHER; CLUTCH SIZE; GREAT
TITS; SETOPHAGA-RUTICILLA; SEASONAL DECLINE
AB Birds that arrive and breed early often have higher reproductive success than late individuals, either as a consequence of timing-specific advantages (the timing hypothesis) or because these individuals and/or their resources are of higher quality (the quality hypothesis). In this study, we examined the potential influence of several factors affecting reproductive success by experimentally delaying breeding of early-arriving male American redstarts Setophaga ruticilla, a species for which early male arrival is strongly related to increased reproductive success. Our manipulation involved the capture, holding, and release of males following pairing and territory establishment, resulting in the majority of subjects (67%) losing their initial mate (47%) or mate and territory (20%) and forcing them to start over approximately 12 d after their initial arrival. Males forced to start over (i.e. those losing their first territory and/or mate) did not experience any decrease in body condition, nor did their reproductive behaviour differ from that of early-arriving control males. We found that naturally early-arriving but experimentally manipulated males suffered reduced fledging success in comparison to early-arriving males that bred early or late, but equivalent success in comparison to males that arrived and bred late. Based on our results, we propose that the relationship between early arrival and higher reproductive success in this species is mediated not simply by individual male quality or absolute arrival timing alone, but rather some other aspect of resource quality is likely important. We discuss and present evidence for two alternative explanations under the quality hypothesis: female quality and territory quality. To our knowledge, our study is the first to investigate the effects of experimentally delaying male breeding time, strengthening previous correlational evidence for resource quality as a potentially important selective agent driving early arrival in migratory birds.
C1 [McKellar, Ann E.; Ratcliffe, Laurene M.] Queens Univ, Dept Biol, Kingston, ON K7L 3N6, Canada.
[Marra, Peter P.] Natl Zool Pk, Migratory Bird Ctr, Smithsonian Conservat Biol Inst, Washington, DC 20013 USA.
RP McKellar, AE (reprint author), Univ Missouri, Dept Fisheries & Wildlife Sci, Columbia, MO 65211 USA.
EM mckellara@missouri.edu
FU J. Fotheringham; Natural Sciences and Engineering Research Council of
Canada; National Science Foundation; Animal Behavior Society; American
Ornithologists' Union
FX We thank C. Crossman, M. Daniel, N. Koomen, R. Kresnick, A. Porter, P.
Pulgarin-Restrepo, C. Toth and C. Willis for help in the field and the
staff of the Queen's Univ. Biological Station for logistical support. J.
Churchill and P. Martin helped with the experimental design, and P.
Martin M. Reudink provided insightful comments on the manuscript.
Financial support was provided by J. Fotheringham, the Natural Sciences
and Engineering Research Council of Canada, the National Science
Foundation, the Animal Behavior Society, and the American
Ornithologists' Union. All work was performed in accordance with permits
from the Queen's Univ. Animal Care Committee (Ratcliffe-2010-006) and
CWS (banding permit 10771E and collection permit CA0261).
NR 62
TC 6
Z9 6
U1 1
U2 28
PU WILEY-BLACKWELL
PI HOBOKEN
PA 111 RIVER ST, HOBOKEN 07030-5774, NJ USA
SN 0908-8857
J9 J AVIAN BIOL
JI J. Avian Biol.
PD SEP
PY 2013
VL 44
IS 5
BP 495
EP 503
DI 10.1111/j.1600-048X.2013.00180.x
PG 9
WC Ornithology
SC Zoology
GA 226AG
UT WOS:000325005900010
ER
PT J
AU Pestle, WJ
Curet, LA
Ramos, RR
Lopez, MR
AF Pestle, William J.
Curet, L. Antonio
Ramos, Reniel Rodriguez
Lopez, Miguel Rodriguez
TI NEW QUESTIONS AND OLD PARADIGMS: REEXAMINING CARIBBEAN CULTURE HISTORY
SO LATIN AMERICAN ANTIQUITY
LA English
DT Article
ID PUERTO-RICO; ARCHAEOLOGY; PREHISTORY; SERIATION; AGE
AB One of the central goals of archaeology is the definition of regional cultural succession. Since at least the 1960s, archaeology has purported to have moved beyond the strictures of Culture History, and yet the constructs of that paradigm (styles, periods, cultures) continue to be used routinely. This work aims to show that by doing so, one is still implicitly subscribing to that theoretical perspective's assumptions and biases. In the end, this article is intended to be a self-critical assessment of the shortcomings of Caribbean archaeology vis-a-vis issues inherent in that region's dominant culture-history framework. Moreover, it aims to provide an example for Caribbeanists, and archaeologists working in other regions, of the value of moving beyond the products of, and not just beyond the term, Culture History.
C1 [Pestle, William J.] Univ Miami, Dept Anthropol, Coral Gables, FL 33124 USA.
[Curet, L. Antonio] Smithsonian Inst Cultural Resources Ctr, Natl Museum Amer Indian, Suitland, MD 20746 USA.
[Ramos, Reniel Rodriguez] Univ Puerto Rico Utuado, Social Sci Program, Utuado, PR 00641 USA.
[Lopez, Miguel Rodriguez] Ctr Estudios Avanzados Puerto Rico & El Caribe, San Juan, PR USA.
RP Pestle, WJ (reprint author), Univ Miami, Dept Anthropol, 102E Merrick Hall, Coral Gables, FL 33124 USA.
EM w.pestle@miami.edu
NR 117
TC 3
Z9 3
U1 0
U2 6
PU SOC AMER ARCHAEOLOGY
PI WASHINGTON
PA 900 SECOND ST., NE STE 12, WASHINGTON, DC 20002-3557 USA
SN 1045-6635
J9 LAT AM ANTIQ
JI Lat. Am. Antiq.
PD SEP
PY 2013
VL 24
IS 3
BP 243
EP 261
PG 19
WC Archaeology
SC Archaeology
GA 218ON
UT WOS:000324442100001
ER
PT J
AU Falzoni, F
Petrizzo, MR
MacLeod, KG
Huber, BT
AF Falzoni, Francesca
Petrizzo, Maria Rose
MacLeod, Kenneth G.
Huber, Brian T.
TI Santonian-Campanian planktonic foraminifera from Tanzania, Shatsky Rise
and Exmouth Plateau: Species depth ecology and paleoceanographic
inferences
SO MARINE MICROPALEONTOLOGY
LA English
DT Article
DE Planktonic foraminifera; Late Cretaceous; Stable isotopes;
Paleo-habitats; Ecological intervals; Paleoceanography
ID SEA-SURFACE TEMPERATURES; STABLE ISOTOPIC SIGNALS; SOUTHERN
HIGH-LATITUDES; EASTERN INDIAN-OCEAN; EVOLUTIONARY HISTORY; COASTAL
TANZANIA; TROPICAL ATLANTIC; DEMERARA RISE; NW AUSTRALIA;
BIOSTRATIGRAPHY
AB The Santonian-Campanian interval is of particular interest as it encompasses a cooling trend after the Late Cretaceous greenhouse maximum warmth of the Turonian as well as a possibly related major faunal turnover among planktonic foraminifera. The recovery of pristinely preserved planktonic foraminifera from Santonian-Campanian sequences in southeastern Tanzania allows examination of faunal changes and documentation of species-specific stable isotope (delta C-13 and delta O-18) signatures. These isotopic data are ideal for inferring species paleoecological preferences and for tracing major paleoceanographic changes. This study reports the first delta O-18 and delta C-13 data generated on "glassy" specimens of Marginotruncana coronata, M. undulata, M. marginata, and M. pseudolinneiana and Sigalia carpatica. Additional results from Shatsky Rise (Ocean Drilling Program Leg 198, Hole 1210B) and Exmouth Plateau (ODP Leg 122, Hole 762C) provide geographic control on species habitat preferences and paleoceanographic context. Isotopic analyses suggest that double-keeled species, including Globotruncana bulloides, Contusotruncana fornicata, C. plummerae and probably marginotruncanids, inhabited the surface mixed layer, whereas the biserial Gublerina rajagopalani was a permanent thermocline dweller. Thus, our study confirms recent suggestions that the depth-distribution models based on shell morphology and analogies with modern taxa are not applicable. At all the examined localities, changes in planktonic foraminiferal assemblages are used to define several ecological intervals, each one characterized by a distinctive taxonomic composition and/or increasing/decreasing species diversity. Combined geochemical and paleontological observations suggest that, by the middle-late Campanian, a stratified upper water column developed in Tanzania while less stratified and/or mesotrophic conditions prevailed at Shatsky Rise and Exmouth Plateau. (C) 2013 Elsevier B.V. All rights reserved.
C1 [Falzoni, Francesca; Petrizzo, Maria Rose] Univ Milan, Dipartimento Sci Terra A Desio, I-20133 Milan, Italy.
[MacLeod, Kenneth G.] Univ Missouri, Dept Geol Sci, Columbia, MO USA.
[Huber, Brian T.] Smithsonian Natl Museum Nat Hist, Dept Paleobiol, Washington, DC 20013 USA.
RP Falzoni, F (reprint author), Univ Milan, Dipartimento Sci Terra A Desio, Via Mangiagalli 34, I-20133 Milan, Italy.
EM francesca.falzoni1@gmail.com; mrose.petrizzo@unimi.it;
MacLeodK@missouri.edu; HUBERB@si.edu
RI MacLeod, Kenneth/C-4042-2017; Petrizzo, Maria Rose/M-8672-2013;
OI MacLeod, Kenneth/0000-0002-6016-0837; Petrizzo, Maria
Rose/0000-0002-9584-8471; Falzoni, Francesca/0000-0002-5694-9827
FU Cushman Foundation for Foraminiferal Research; Smithsonian Institution;
Universita degli Studi di Milano; PUR (Universita degli Studi di Milano,
Italy)
FX The Tanzania Petroleum Development Corporation and the Tanzania
Commission for Science and Technology are acknowledged for logistical
support to the drilling expeditions. The Tanzania Drilling Project and
the Ocean Drilling Program are thanked for making available the samples
for this study. F.F. warmly thanks the Cushman Foundation for
Foraminiferal Research (Johanna M. Resig Fellowship), the Smithsonian
Institution (Smithsonian Institution Pre-doctoral Fellowship) and the
PhD program of the Universita degli Studi di Milano for funding this
study. Financial support of PUR 2008 (Universita degli Studi di Milano,
Italy) to M.R.P. is acknowledged.
NR 76
TC 11
Z9 11
U1 1
U2 13
PU ELSEVIER SCIENCE BV
PI AMSTERDAM
PA PO BOX 211, 1000 AE AMSTERDAM, NETHERLANDS
SN 0377-8398
J9 MAR MICROPALEONTOL
JI Mar. Micropaleontol.
PD SEP
PY 2013
VL 103
BP 15
EP 29
DI 10.1016/j.marmicro.2013.07.003
PG 15
WC Paleontology
SC Paleontology
GA 228OC
UT WOS:000325195100002
ER
PT J
AU Yasuhara, M
Hunt, G
Okahashi, H
Brandao, SN
AF Yasuhara, Moriaki
Hunt, Gene
Okahashi, Hisayo
Brandao, Simone N.
TI THE 'OXYCYTHEREIS' PROBLEM: TAXONOMY AND PALAEOBIOGEOGRAPHY OF DEEP-SEA
OSTRACOD GENERA PENNYELLA AND RUGOCYTHEREIS
SO PALAEONTOLOGY
LA English
DT Article
DE Deep sea; Ostracoda; taxonomy; palaeobiogeography; Pennyella;
Rugocythereis
ID SUBPOLAR NORTH-ATLANTIC; SOUTHERN-OCEAN; SPECIES-DIVERSITY;
INDIAN-OCEAN; PALAEOCEANOGRAPHICAL CHANGES; BATHYAL OSTRACODA;
CLIMATE-CHANGE; NEW-ZEALAND; MAUD RISE; CRUSTACEA
AB Systematic revision of the globally distributed deep-sea ostracod genera Pennyella Neale, 1974 and Rugocythereis Dingle, Lord and Boomer, 1990, which have been considered to correspond, at least partially, to nomen nudum but widely used genus name 'Oxycythereis,' was conducted to reduce taxonomic uncertainty of these important components of the Modern and fossil deep-sea ostracod community. Approximately 100 specimens from 18 species were examined, ranging in age from the Cretaceous to the present day. Nine new species are described: Pennyella rexi, Pennyella sanfordae, Pennyella liowae, Pennyella schellenbergi, Pennyella majorani, Pennyella iani, Pennyella ayressi, Rugocythereis melonis and Rugocythereis zarikiani. Emended generic concepts of Pennyella and Rugocythereis are proposed, and the palaeobiogeographical distributions of these two genera are discussed.
C1 [Yasuhara, Moriaki; Okahashi, Hisayo] Univ Hong Kong, Swire Inst Marine Sci, Sch Biol Sci, Hong Kong, Hong Kong, Peoples R China.
[Yasuhara, Moriaki; Okahashi, Hisayo] Univ Hong Kong, Dept Earth Sci, Hong Kong, Hong Kong, Peoples R China.
[Hunt, Gene] Smithsonian Inst, Dept Paleobiol, Natl Museum Nat Hist, Washington, DC 20013 USA.
[Brandao, Simone N.] Univ Hamburg, Biozentrum Grindel, D-20146 Hamburg, Germany.
[Brandao, Simone N.] Univ Hamburg, Zool Museum, D-20146 Hamburg, Germany.
[Brandao, Simone N.] DZMB, D-26382 Wilhelmshaven, Germany.
RP Yasuhara, M (reprint author), Univ Hong Kong, Swire Inst Marine Sci, Sch Biol Sci, Hong Kong, Hong Kong, Peoples R China.
EM moriakiyasuhara@gmail.com; hunte@si.edu; hisaseal@gmail.com;
brandao.sn.100@gmail.com
RI Hunt, Gene/B-3783-2010; Brandao, Simone/K-4672-2012
OI Hunt, Gene/0000-0001-6430-5020;
FU Seed Funding Programme for Basic Research of the University of Hong Kong
[201105159002]; Smithsonian Postdoctoral Fellowship; Smithsonian Marine
Science Network Postdoctoral Fellowship; Alexander von Humboldt Stiftung
and SYNTHESYS
FX We thank T. M. Cronin for providing us specimens and valuable comments;
D. Hodell for loaning us ODP 982 core samples; M. A. Ayress for
providing us specimens and SEM negatives; C. Sanford for continuous
support; S. Whittaker for help in SEM imaging; D. Levin and K. Hollis
for help in depositing type and figured specimens; M. Lowe and G. Miller
for carefully assisting S.N.B. during her visits to the Natural History
Museum, London, and providing access to the ostracod collections housed
in the Natural History Museum; K. Swanson, S. Thomas and two anonymous
referees for valuable comments. Considerable part of specimens used for
this research comes from late R. H. Benson's deep-sea ostracod
collection housed in the National Museum of Natural History, Smithsonian
Institution. Some samples used for this research were provided by the
Integrated Ocean Drilling Program (IODP). This work was supported by the
Seed Funding Programme for Basic Research of the University of Hong Kong
(project code: 201105159002), Smithsonian Postdoctoral Fellowship and
Smithsonian Marine Science Network Postdoctoral Fellowship (to M.Y.) and
by the Alexander von Humboldt Stiftung and SYNTHESYS (to S.N.B.).
NR 87
TC 2
Z9 2
U1 1
U2 3
PU WILEY-BLACKWELL
PI HOBOKEN
PA 111 RIVER ST, HOBOKEN 07030-5774, NJ USA
SN 0031-0239
EI 1475-4983
J9 PALAEONTOLOGY
JI Paleontology
PD SEP
PY 2013
VL 56
IS 5
BP 1045
EP 1080
DI 10.1111/pala.12035
PG 36
WC Paleontology
SC Paleontology
GA 227AW
UT WOS:000325080600008
ER
PT J
AU Tornabene, L
Ahmadia, GN
Williams, JT
AF Tornabene, Luke
Ahmadia, Gabby N.
Williams, Jeffrey T.
TI Four new species of dwarfgobies (Teleostei: Gobiidae: Eviota) from the
Austral, Gambier, Marquesas and Society Archipelagos, French Polynesia
SO SYSTEMATICS AND BIODIVERSITY
LA English
DT Article
DE coral reef fish; Gobioidei; Gobiiformes; goby; phylogeny; systematics
ID CORAL-REEF FISHES; RYUKYU ISLANDS; PACIFIC-OCEAN; GENUS EVIOTA; GOBY
AB Four new species of Eviota (Teleostei: Gobiidae) are described from French Polynesia. Eviota hinanoae occurs from the Gambier, Austral and Society Archipelagos and differs from its closest relatives primarily in sensory pore pattern, having cuplike male urogenital papilla, and in lacking prominent dark pigmentation on the base of the pectoral fin. Three other new species, E. dorsimaculata, E. lacrimosa and E. deminuta, are known only from the Marquesas Islands and are distinguished from congeners by differences in pigmentation, sensory pore pattern, urogenital papilla shape, the number of rays in the dorsal and anal fins, and the length of the fifth pelvic-fin ray. Eviota deminuta represents one of the smallest known species of Eviota and features reductions in several morphological characters, including the loss of all head pores. Three of the new species are included in a phylogenetic analysis based on mitochondrial cytochrome c oxidase-I, along with 21 additional species of Eviota.
C1 [Tornabene, Luke] Texas A&M Univ, Coll Sci & Engn, Corpus Christi, TX 78412 USA.
[Ahmadia, Gabby N.] World Wildlife Fund, Conservat Sci Program, Washington, DC 20037 USA.
[Williams, Jeffrey T.] Smithsonian Inst, Dept Vertebrate Zool, Natl Museum Nat Hist, Div Fishes, Suitland, MD 20746 USA.
RP Tornabene, L (reprint author), Texas A&M Univ, Coll Sci & Engn, 6300 Ocean Dr, Corpus Christi, TX 78412 USA.
EM luke.tornabene@tamucc.edu
FU Agence des Aires Marines Protegees in France; Texas AM University;
Centre Plongee Marquises; Fondation TOTAL; Ministere de l'Environnement
de Polynesie; Delegation a la Recherche de Polynesie; Mairie of
Nuku-Hiva; 'Contrat de projet Etat-Polynesie'; ANR 'IMODEL'; French
Ministry for Environment, Sustainable Development and Transport
(MEDDTL); Biocode Moorea programme; Jeff Hunt of the Laboratories of
Analytical Biology (Smithsonian Institution)
FX We thank Frank Murphy, Hinano Murphy and the staff of the Berkeley Gump
Station in Moorea for assistance with coordinating fieldwork. The
Marquesas specimens were collected during part of the Pakaihi i te Moana
expedition organized and funded by the Agence des Aires Marines
Protegees in France. Serge Planes organized and led expeditions to
French Polynesia that resulted in the collection of representatives of
these and other new species. We thank Jocelyn Curtis-Quick for her help
in the field. Diane Pitassy at USNM, Dave Catania at CAS and Romain
Causse at MNHN helped with deposition of specimens. We gratefully
acknowledge Dave Greenfield for helpful discussion, and he and Richard
Winterbottom for providing preliminary unpublished dichotomous keys for
Eviota species. Fieldwork by LT and GA in Moorea was graciously funded
by Frank Pezold and by the Texas A&M University - Corpus Christi
International Studies Study Abroad Scholarship. We thank the Centre
Plongee Marquises, Xavier (Pipapo) and Marie Curvat, l'Agence des Aires
Marines Marine Protegees, the Fondation TOTAL, the Ministere de
l'Environnement de Polynesie, the Delegation a la Recherche de
Polynesie, the Mairie of Nuku-Hiva, and the people of the Marquesas
Islands for their kind and generous support of the project as JTW
travelled throughout the islands. The Captain, crew and owner of the M/V
"Braveheart' (Marquesas Expedition) and the crew of the M/V "Claymore
II' (Gambier Expedition) provided invaluable assistance during those
cruises. The Coralspot expedition to Gambier was funded by the 'Contrat
de projet Etat-Polynesie', by the ANR 'IMODEL' and the French Ministry
for Environment, Sustainable Development and Transport (MEDDTL). We
thank Jerry Finan, Erika Wilbur, Shirleen Smith, Kris Murphy, David
Smith and Sandra Raredon of the Division of Fishes (National Museum of
Natural History) for assistance in expedition preparations and
processing specimens. Sandra Raredon and Kris Murphy provided digital
and film radiographs. Chris Meyer (USNM) and the Biocode Moorea
programme provided funding for the sequencing of tissues from the
Gambier collections. Lee Weight, Amy Driskell and Jeff Hunt of the
Laboratories of Analytical Biology (Smithsonian Institution) provided
support for and assistance with molecular analysis of samples. We are
especially grateful to Serge Planes, Erwan Delrieu-Trottin, Tom Cribb,
Rene Galzin, Pierre Sasal and Johan Mourier for their field assistance
collecting fishes in the Marquesas. We thank Labex 'CORAIL'
and the staff of the Centre de Recherche Insulaire et Observatoire de
l'Environnement (CRIOBE), Moorea, for logistical support. The Leonard P.
Schultz Fund (Division of Fishes, National Museum of Natural History)
provided grants in support of fieldwork and museum visits.
NR 30
TC 4
Z9 4
U1 0
U2 17
PU TAYLOR & FRANCIS LTD
PI ABINGDON
PA 4 PARK SQUARE, MILTON PARK, ABINGDON OX14 4RN, OXON, ENGLAND
SN 1477-2000
EI 1478-0933
J9 SYST BIODIVERS
JI Syst. Biodivers.
PD SEP 1
PY 2013
VL 11
IS 3
BP 363
EP 380
DI 10.1080/14772000.2013.819822
PG 18
WC Biodiversity Conservation; Biology
SC Biodiversity & Conservation; Life Sciences & Biomedicine - Other Topics
GA 227OY
UT WOS:000325124400007
ER
PT J
AU Eberhard, WG
AF Eberhard, William G.
TI The Polysphinctine Wasps Acrotaphus tibialis, Eruga ca. gutfreundi, and
Hymenoepimecis tedfordi (Hymenoptera, Ichneumonidae, Pimplinae) Induce
Their Host Spiders to Build Modified Webs
SO ANNALS OF THE ENTOMOLOGICAL SOCIETY OF AMERICA
LA English
DT Article
DE host manipulation; spider web; polysphinctine wasp
ID NEPHILA-CLAVIPES ARANEAE; MANIPULATION; BEHAVIOR; TETRAGNATHIDAE;
PARASITOIDS; ARANEIDAE; PHYLOGENY; UCHIDA
AB The wasps Acrotaphus tibialis (Cameron), Eruga ca. gutfreundi Gauld, and Hymenoepimecis tedfordi Gauld induce their host spiders to spin modified "cocoon" webs just before they kill them and pupate. The cocoon webs induced by all three wasp species appear better designed to support and protect the waspsO pupal cocoons than are the normal orbs of their hosts. The typical cocoon webs induced by A. tibialis were similar to the protected resting webs built by their host spiders Argiope trifasciata (Forskal) but had more elaborate protective barrier tangles. The other two species of wasp induced the same host spider, Leucauge mariana (Keyserling) to build quite different cocoon webs. The cocoon webs of H. tedfordi varied somewhat, but usually included radial lines and a tangle below. They resembled the resting webs of the host in having a planar radial organization and (often) a tangle below, but lacked a hub and had their lines that were apparently composed of high numbers of individual strands. The three dimensional, radially arranged cocoon web of E. ca. gutfreundi had no clear counterpart in the webs of unparasitized L. mariana. The substantial intraspecific variation in the cocoon webs, especially those of A. tibialis, emphasizes the apparent difficulty of precise host manipulation by these wasps.
C1 [Eberhard, William G.] Univ Costa Rica, Smithsonian Trop Res Inst, San Jose, Costa Rica.
[Eberhard, William G.] Univ Costa Rica, Escuela Biol, San Jose, Costa Rica.
RP Eberhard, WG (reprint author), Univ Costa Rica, Smithsonian Trop Res Inst, San Jose, Costa Rica.
EM william.eberhard@gmail.com
FU Smithsonian Tropical Research Institute; Universidad de Costa Rica
FX I am indebted to Paul Hanson for kindly identifying the wasps and help
with literature, to Gilbert Barrantes and Ruth Madrigal-Brenes for help
finding parasitized spiders in the field, and to two anonymous reviewers
for helpful comments. I am grateful for financial support from the
Smithsonian Tropical Research Institute and the Universidad de Costa
Rica.
NR 25
TC 10
Z9 11
U1 2
U2 25
PU OXFORD UNIV PRESS INC
PI CARY
PA JOURNALS DEPT, 2001 EVANS RD, CARY, NC 27513 USA
SN 0013-8746
EI 1938-2901
J9 ANN ENTOMOL SOC AM
JI Ann. Entomol. Soc. Am.
PD SEP
PY 2013
VL 106
IS 5
BP 652
EP 660
DI 10.1603/AN12147
PG 9
WC Entomology
SC Entomology
GA 219QF
UT WOS:000324522500013
ER
PT J
AU Pimiento, C
Gonzalez-Barba, G
Ehret, DJ
Hendy, AJW
MacFadden, BJ
Jaramillo, C
AF Pimiento, Catalina
Gonzalez-Barba, Gerardo
Ehret, Dana J.
Hendy, Austin J. W.
MacFadden, Bruce J.
Jaramillo, Carlos
TI SHARKS AND RAYS (CHONDRICHTHYES, ELASMOBRANCHII) FROM THE LATE MIOCENE
GATUN FORMATION OF PANAMA
SO JOURNAL OF PALEONTOLOGY
LA English
DT Article
ID CENTRAL-AMERICAN SEAWAY; MIDDLE MIOCENE; SOUTH-AMERICA; WHITE SHARK;
CARCHARODON LAMNIFORMES; FISH ASSEMBLAGE; WESTERN PANAMA; NEOGENE;
ISTHMUS; CLOSURE
AB The late Miocene Gatun Formation of northern Panama Contains a highly diverse and well sampled fossil marine assemblage that occupied a shallow-water embayment close to a purported connection between the Pacific and Atlantic (Caribbean) oceans. However, the diverse chondrichthyan fauna has been poorly documented. Based on recent field discoveries and further analysis of existing collections, the chondrichthyan fauna from this unit comprises at least 26 taxa, of which four species are extinct today. The remaining portion of the total chondrichthyan biodiversity has affmities with modern taxa and is therefore comprised of long-lived species. Based on known records of the modern geographic distribution range of the Gatun chondrichthyans, the fauna has mixed biogeographic affinities suggesting that around 10 million yr ago, a connection likely occurred between the Pacific Ocean and the Caribbean Sea. Given the known habitat preferences for modern chondrichthyans, the Gatun fauna was primarily adapted to shallow waters within the neritic zone. Finally, comparisons of Gatun dental measurements with other faunas suggest that many of the taxa have an abundance of small individuals, in agreement with previous studies that proposed this area as a paleonursery habitat for the species Carcharocles megalodon.
C1 [Pimiento, Catalina; Hendy, Austin J. W.; MacFadden, Bruce J.] Univ Florida, Florida Museum Nat Hist, Gainesville, FL 32611 USA.
[Pimiento, Catalina; Hendy, Austin J. W.; Jaramillo, Carlos] Ctr Trop Paleoecol & Archaeol, Smithsonian Trop Res Inst, Panama City, Panama.
[Pimiento, Catalina] Univ Florida, Dept Biol, Gainesville, FL 32611 USA.
[Gonzalez-Barba, Gerardo] Univ Autonoma Baja California Sur, Area Ciencias Mar, Museo Hist Nat, Mexico City 23080, DF, Mexico.
[Ehret, Dana J.] Univ Alabama, Alabama Museum Nat Hist, Tuscaloosa, AL 35487 USA.
RP Pimiento, C (reprint author), Univ Florida, Florida Museum Nat Hist, Gainesville, FL 32611 USA.
EM pimientoc@ufl.edu; gerardo@uabcs.mx; djehret@ua.edu;
ahendy@flmnh.ufl.edu; bmacfadd@flmnh.ufl.edu; jaramilloc@si.edu
FU NSF [EAR 0418042, PIRE 0966884]; Autoridad del Canal de Panama contrato
[SAA-199520-KRP]; Ricardo Perez S.A., M. Tupper, National Geographic
Channel; Smithsonian Institution; Jon A. and Beverly L. Thompson
Endowment
FX This project was funded by NSF EAR 0418042, PIRE 0966884, Autoridad del
Canal de Panama contrato SAA-199520-KRP, Ricardo Perez S.A., M. Tupper,
National Geographic Channel, and the Smithsonian Institution. We thank
the Direccion de Recursos Minerales of Panama for collecting permits; R.
Hulbert, J. Bloch, G. Morgan for beneficial suggestions; G. Hubbell and
R. Leder for helping with the identification of the material; A. Rincon,
F. Rodriguez, C. De Gracia, and the Panama Canal Project Field Team in
the Center for Tropical Paleobiology and Archaeology at STRI for helping
with the collection; D. Winkler of SMU and M. Florence of the USNM for
access to collections; and M. Shippritt, R. G. Reina, and C. Symister
for logistical support. Lastly, we thank J. Ceballos for editing an
earlier version of this manuscript, and O. Aguilera and an anonymous
reviewer who helped improving it. C. Jaramillo thanks the University of
Yale Edward P. Bass Distinguished Visiting Environmental Scholarship and
A. Hendy acknowledges support from the Jon A. and Beverly L. Thompson
Endowment. C. Pimiento thanks J. McLaughlin for support. This is
University of Florida Contribution to Paleontology number 628.
NR 131
TC 13
Z9 16
U1 3
U2 25
PU PALEONTOLOGICAL SOC INC
PI LAWRENCE
PA 810 EAST 10TH ST, LAWRENCE, KS 66044 USA
SN 0022-3360
EI 1937-2337
J9 J PALEONTOL
JI J. Paleontol.
PD SEP
PY 2013
VL 87
IS 5
BP 755
EP 774
DI 10.1666/12-117
PG 20
WC Paleontology
SC Paleontology
GA 217IJ
UT WOS:000324352900001
ER
PT J
AU Paez-Reyes, M
Head, MJ
AF Paez-Reyes, Manuel
Head, Martin J.
TI THE CENOZOIC GONYAULACACEAN DINOFLAGELLATE GENERA OPERCULODINIUM WALL,
1967 AND PROTOCERATIUM BERGH, 1881 AND THEIR PHYLOGENETIC RELATIONSHIPS
SO JOURNAL OF PALEONTOLOGY
LA English
DT Article
ID HARMFUL ALGAL BLOOMS; GREAT BAHAMA BANK; RETICULATUM DINOPHYCEAE;
PLEISTOCENE SERIES/EPOCH; QUATERNARY SYSTEM/PERIOD; FORMAL RATIFICATION;
RECENT SEDIMENTS; NORTH-SEA; CYSTS; MORPHOLOGY
AB To clarify the systematic positions of the important gonyaulacacean genera Operculodinium Wall, 1967 emend. Matsuoka et al., 1997 and Protoceratium Bergh, 1881, we present in detail the tabulation of the Oligocene- Pleistocene, thermophilic, cyst-defined species Operculodinium bahamense Head in Head and Westphal, 1999 emend., and the extant, cosmopolitan, theca-defined species Protoceratium reticulatum (Claparede and Lachmann, 1859) Butschli, 1885. Both species have a sexiform hyposomal tabulation, and L-type (Protoceratium reticulatum) or modified L-type (Operculodinium bahamense) ventral organization. Protoceratium reticulatum has dextral torsion of the hypotheca, requiring assignation of the genus to the subfamily Cribroperidinioideae Fensome et al., 1993, whereas Operculodinium bahamense has neutral torsion requiring assignation to the subfamily Leptodinioideae Fensome et al., 1993. The stratigraphic range of this subfamily is now extended upwards to the lower Pleistocene. Paradoxically, Protoceratium reticulatum produces a cyst whose morphology is circumscribed by the cyst-defined genus Operculodinium, either implying polyphyletic origins for this genus or that combinations of ventral organization and torsion used to subdivide the family Gonyaulacaceae cannot always be applied rigidly. In detail, Operculodinium bahamense is shown to have an unusual ventral tabulation in which the first apical plate contacts the apical pore complex but not the sulcus. The new term "episert" is proposed to describe this plate relationship, which appears to have evolved independently in several lineages of the suborder Gonyaulacineae.
C1 [Paez-Reyes, Manuel; Head, Martin J.] Brock Univ, Dept Earth Sci, St Catharines, ON L2S 3A1, Canada.
[Paez-Reyes, Manuel] Smithsonian Trop Res Inst, Balboa, Ancon, Panama.
RP Paez-Reyes, M (reprint author), Brock Univ, Dept Earth Sci, 500 Glenridge Ave, St Catharines, ON L2S 3A1, Canada.
EM manuel.paez@gmail.com; mjhead@broku.ca
FU Natural Sciences and Engineering Research Council of Canada; Brock
University; Smithsonian Tropical Research Institute
FX We thank M. Hoppenrath (DZMB, Forschungsinstitut Senckenberg) for making
available published and unpublished microphotographs of Protoceratium
reticulatum, and K. Mertens (Ghent University) for bringing our
attention to some of the older literature. K. Matsuoka (Nagasaki
University) and K. Mertens provided helpful comments on the episert
condition in extant species. The Integrated Ocean Drilling Program
provided the samples for this research. MJH acknowledges support from a
Discovery Grant of the Natural Sciences and Engineering Research Council
of Canada. MP-R is grateful to Brock University and the Smithsonian
Tropical Research Institute for financial support at various stages of
this research. Mr. Jorge Ceballos (Smithsonian Tropical Research
institute) helped with SEM photography. Helpful reviews of the
manuscript by L. E. Edwards and J. Lucas-Clark are greatly appreciated,
especially insightful comments from L. E. Edwards regarding the episert
condition.
NR 94
TC 6
Z9 6
U1 1
U2 7
PU CAMBRIDGE UNIV PRESS
PI NEW YORK
PA 32 AVENUE OF THE AMERICAS, NEW YORK, NY 10013-2473 USA
SN 0022-3360
EI 1937-2337
J9 J PALEONTOL
JI J. Paleontol.
PD SEP
PY 2013
VL 87
IS 5
BP 786
EP 803
DI 10.1666/12-103
PG 18
WC Paleontology
SC Paleontology
GA 217IJ
UT WOS:000324352900003
ER
PT J
AU Prothero, DR
Beatty, BL
Stucky, RM
AF Prothero, Donald R.
Beatty, Brian L.
Stucky, Richard M.
TI SIMOJOVELHYLIS IS A PECCARY, NOT A HELOHYID (MAMMALIA, ARTIODACTYLA)
SO JOURNAL OF PALEONTOLOGY
LA English
DT Article
ID MIOCENE; AMERICA
AB Simojovelhyus pocitosense is based on a lower jaw fragment with three molars from the late Oligocene amber mine deposits near the village of Simojovel, Chiapas Province, Mexico. It is the oldest fossil mammal known from Central America. It was described by Ferrusquia-Villafranca in 2006 as a helohyid, a group of primitive artiodactyls known from the Bridgerian and Uintan (older than 49-42 Ma), yet it comes from early Arikareean deposits about 25-27 Ma, suggesting that it was a very late helohyid living more than 10 m.y. after their apparent Uintan extinction. We re-examined the specimen, and compared it to the large collection of recently described peccaries from the Chadronian (Perchoerus minor) and Orellan (Perchoerus nanus) and Bridgerian helohyids (Helohyus sp.). Once the range of variation of characters in helohyids and peccaries is accounted for, Simojovelhyus shows derived similarities to early peccaries, especially in the bunodont molars with inflated cusps and the configuration of cristids and accessory cuspulids, and none of the incipient lophodonty and primitive morphology seen in helohyids. In fact, the only real similarity other than symplesiomorphies between Simojovelhyus and helohyids is its small size, but it is close to the size range of the tiny Chadronian peccary P. minor. Thus, based on both derived tooth characters and its age, it is much more parsimonious to regard Simojovelhyus as a tiny Mexican peccary from the Arikareean, not a very late helohyid. This removes the anomalously late occurrence of helohyids from the mammalian fossil record, and forces a re-examination of our view of mammalian evolution in Central America.
C1 [Prothero, Donald R.] Los Angeles Cty Museum Nat Hist, Dept Vertebrate Paleontol, Los Angeles, CA 90007 USA.
[Beatty, Brian L.] New York Inst Technol, Coll Osteopath Med, Old Westbury, NY 11568 USA.
[Beatty, Brian L.] Smithsonian Inst, Natl Museum Nat Hist, Washington, DC 20560 USA.
[Beatty, Brian L.] Virginia Museum Nat Hist, Martinsville, VA USA.
[Stucky, Richard M.] Denver Museum Nat & Sci, Denver, CO 80205 USA.
RP Prothero, DR (reprint author), Los Angeles Cty Museum Nat Hist, Dept Vertebrate Paleontol, Los Angeles, CA 90007 USA.
EM donaldprothero@att.net; bbeatty@nyit.edu; Richard.stucky@dmns.org
NR 8
TC 1
Z9 1
U1 0
U2 3
PU PALEONTOLOGICAL SOC INC
PI LAWRENCE
PA 810 EAST 10TH ST, LAWRENCE, KS 66044 USA
SN 0022-3360
J9 J PALEONTOL
JI J. Paleontol.
PD SEP
PY 2013
VL 87
IS 5
BP 930
EP 933
DI 10.1666/12-084
PG 4
WC Paleontology
SC Paleontology
GA 217IJ
UT WOS:000324352900013
ER
PT J
AU Bret, A
Stockem, A
Fiuza, F
Alvaro, EP
Ruyer, C
Narayan, R
Silva, LO
AF Bret, Antoine
Stockem, Anne
Fiuza, Frederico
Perez Alvaro, Erica
Ruyer, Charles
Narayan, Ramesh
Silva, Luis O.
TI The formation of a collisionless shock
SO LASER AND PARTICLE BEAMS
LA English
DT Article
DE Collisionless shocks; Weibel instability; Plasma fluctuations
ID PARTICLE-ACCELERATION; MAGNETIC-FIELD; INSTABILITY; PLASMA;
FILAMENTATION; GENERATION; WEIBEL
AB Collisionless shocks are key processes in astrophysics where the energy dissipation at the shock front is provided by collective plasma effects rather than particle collisions. While numerous simulations and laser-plasma experiments have shown they can result from the encounter of two plasma shells, a first principle theory of the shock formation is still lacking. In this respect, a series of 2D Particle-In-Cells simulations have been performed of two identical cold colliding pair plasmas. The simplicity of this system allows for an accurate analytical tracking of the physics. To start with, the Weibel-filamentation instability is triggered in the overlapping region, which generates a turbulent region after a saturation time tau(s). The incoming flow then piles-up in this region, building-up the shock density region according to some nonlinear processes, which will be the subject of future works. By evaluating the seed field giving rise to the instability, we derive an analytical expression for tau(s) in good agreement with simulations. In view of the importance of the filamentation instability, we show a static magnetic field can cancel it if and only if it is perfectly aligned with the flow.
C1 [Bret, Antoine; Perez Alvaro, Erica] Univ Castilla La Mancha, ETSI Ind, E-13071 Ciudad Real, Spain.
[Bret, Antoine; Perez Alvaro, Erica] Inst Invest Energet & Aplicaciones Ind, Ciudad Real, Spain.
[Stockem, Anne; Fiuza, Frederico; Silva, Luis O.] Inst Super Tecn, Lab Associado, GoLP Inst Plasmas & Fusao Nucl, Lisbon, Portugal.
[Ruyer, Charles] CEA, DAM, DIF, F-91297 Arpajon, France.
[Narayan, Ramesh] Harvard Smithsonian Ctr Astrophys, Cambridge, MA 02138 USA.
RP Bret, A (reprint author), Univ Castilla La Mancha, ETSI Ind, E-13071 Ciudad Real, Spain.
EM antoineclaude.bret@uclm.es
RI Silva, Luis/C-3169-2009; Bret, Antoine/C-9112-2009;
OI Silva, Luis/0000-0003-2906-924X; Bret, Antoine/0000-0003-2030-0046;
Fiuza, Frederico/0000-0002-8502-5535; Stockem, Anne
Gabriele/0000-0003-4614-8118; Narayan, Ramesh/0000-0002-1919-2730
FU Spanish Ministerio de Educacion y Ciencia [ENE2009-09276]; European
Research Council [267841]; FCT (Portugal) [PTDC/FIS/111720/2009,
SFRH/BD/38952/2007]
FX This work was supported by projects ENE2009-09276 of the Spanish
Ministerio de Educacion y Ciencia, the European Research Council
(ERC-2010-AdG Grant 267841) and FCT (Portugal) grants
PTDC/FIS/111720/2009 and SFRH/BD/38952/2007. Thanks are due to
LorenzoSironi for useful discussions.
NR 34
TC 1
Z9 1
U1 0
U2 18
PU CAMBRIDGE UNIV PRESS
PI NEW YORK
PA 32 AVENUE OF THE AMERICAS, NEW YORK, NY 10013-2473 USA
SN 0263-0346
EI 1469-803X
J9 LASER PART BEAMS
JI Laser Part. Beams
PD SEP
PY 2013
VL 31
IS 3
BP 487
EP 491
DI 10.1017/S0263034613000372
PG 5
WC Physics, Applied
SC Physics
GA 220NY
UT WOS:000324592500015
ER
PT J
AU Abeytia, R
Guman, HM
Breedy, O
AF Abeytia, Rosalinda
Guman, Hector M.
Breedy, Odalisca
TI Species composition and bathymetric distribution of gorgonians
(Anthozoa: Octocorallia) on the Southern Mexican Pacific coast
SO REVISTA DE BIOLOGIA TROPICAL
LA English
DT Article
DE abundance; bathymetrical distribution; diversity; gorgonians
assemblages; Mexican Pacific
ID SHALLOW-WATER GORGONIANS; CORAL-REEFS; DISTRIBUTION PATTERNS; CARIBBEAN
GORGONIANS; PARAMURICEA-CLAVATA; MARINE OCTOCORAL; PUERTO-RICO;
COELENTERATA; REVISION; SEA
AB Gorgonians are important components of coastal ecosystems, as they provide niches, natural compounds with medical applications and are used as bioindicators. Species composition and assemblage structure of gorgonians (Anthozoa: Octocorallia) were studied along a bathymetric profile in the Southern Mexican Pacific coast. Species composition was based on specimens collected within a depth range of 0-70m in 15 sites. The relative abundance of species was determined in six sites at four depths (5, 10, 20 and 25m) using three 10m(2) transects at each depth level. Twenty-seven species of gorgonians belonging to six genera and three families were registered. The species composition varied with depth: 11 species were distributed between 0-25m depth, while 17 species were found between 40-70m depth interval. The shallow zone is characterized by a relatively large abundance of gorgonians, dominated by colonies of Leptogorgia cuspidata and L. ena. In contrast, the deepest zone was characterized by relatively low abundance of gorgonians, dominated by L. alba, the only species observed in both depth intervals. The similarity analysis showed differences in the composition and abundance of species by depth and site, suggesting that the main factor in determining the assemblage structure is depth. Results of this study suggest that the highest richness of gorgonian species in the study area may be located at depths of 40-70m, whereas the highest abundances are found between 5 and 10m depth. This study represents a contribution to the poorly known eastern Pacific gorgonian biota.
C1 [Abeytia, Rosalinda] Univ Nacl Autonoma Mexico, Unidad Acad Puerto Morelos, Inst Ciencias Mar & Limnol, Cancun 77500, QR, Mexico.
[Guman, Hector M.] Smithsonian Trop Res Inst, Balboa, Panama.
[Breedy, Odalisca] Univ Costa Rica, Ctr Invest Estruct Microscap, Ctr Invest Ciencias Mar & Limnol, San Jose, Costa Rica.
RP Abeytia, R (reprint author), Univ Nacl Autonoma Mexico, Unidad Acad Puerto Morelos, Inst Ciencias Mar & Limnol, Ap Postal 1152, Cancun 77500, QR, Mexico.
EM r.abeytia@gmail.com; GuzmanH@si.edu; odalisca.breedy@ucr.ac.cr
FU Smithsonian Tropical Research Institute, Panama; Universidad del Mar,
Puerto Angel, Mexico
FX We thank Valeria Hernandez Urraca, Imelda Perez Maldonado, Fernando Diaz
and Gonzales for assistance in the field. This manuscript was greatly
improved by comments from Eric Jordan Dahlgren, Rosa Rodriguez Martinez,
Lorenzo Alvarez Filip and Andres Ramon Lopez Perez. This work was
supported by the Smithsonian Tropical Research Institute, Panama and
Universidad del Mar, Puerto Angel, Mexico.
NR 52
TC 3
Z9 3
U1 2
U2 11
PU REVISTA DE BIOLOGIA TROPICAL
PI SAN JOSE
PA UNIVERSIDAD DE COSTA RICA CIUDAD UNIVERSITARIA, SAN JOSE, 00000, COSTA
RICA
SN 0034-7744
EI 2215-2075
J9 REV BIOL TROP
JI Rev. Biol. Trop.
PD SEP
PY 2013
VL 61
IS 3
BP 1157
EP 1166
PG 10
WC Biology
SC Life Sciences & Biomedicine - Other Topics
GA 219LT
UT WOS:000324509200013
PM 24027914
ER
PT J
AU Geatz, GW
Needelman, BA
Weil, RR
Megonigal, JP
AF Geatz, George W.
Needelman, Brian A.
Weil, Raymond R.
Megonigal, J. Patrick
TI Nutrient Availability and Soil Organic Matter Decomposition Response to
Prescribed Burns in Mid-Atlantic Brackish Tidal Marshes
SO SOIL SCIENCE SOCIETY OF AMERICA JOURNAL
LA English
DT Article
ID SALT-MARSH; PLANT ZONATION; CELLULOSE DECOMPOSITION;
SPARTINA-ALTERNIFLORA; FLORIDA EVERGLADES; NORTH-CAROLINA; FIRE;
NITROGEN; VEGETATION; PHOSPHORUS
AB Prescribed fire in tidal marshes has been shown to generate short-term increases in plant-available nutrients, but the long-term implications of fire on nutrient availability and organic matter decomposition have not been well established. Two manipulative experiments were conducted over 1 yr within long-term annual burn and no-burn blocks at the Blackwater National Wildlife Refuge in Cambridge, MD to study the effects of canopy removal and ash deposition on nutrient availability and organic matter decomposition rates following burning. Ash deposition had no significant effects on study variables. At no-burn sites, porewater NH4+ and PO43+ were significantly lower in July in sites with canopy removal (0.15 mg NH4+ L-1 and 0.04 mg PO43+ L-1) compared to sites with a canopy (0.73 mg NH4+ L-1 and 0.08 mg PO43+ L-1). Similar results were found through a canopy replacement treatment at annual burn sites. Decreased porewater NH4+ and PO43+ corresponded to increased total biomass nutrient content. No-burn sites with canopy removal treatments showed significantly lower organic matter decomposition rates than did treatments with a canopy in July (66.5 vs. 74.1% cotton tensile strength loss), corresponding to decreases in porewater NH4+ and PO43+. Plant ash provided a fertilizer pulse of 0.22 g N m(-2) and 0.16 g P m(-2), which were amounts of N and P likely too small to increase plant productivity when deposited during late winter/early spring. Prescribed fire appears to affect nutrient availability and organic matter decomposition in these marsh soils primarily through the mechanism of increased biomass production due to canopy removal.
C1 [Geatz, George W.] Univ Illinois, Illinois Nat Hist Survey, Champaign, IL 61820 USA.
[Needelman, Brian A.; Weil, Raymond R.] Univ Maryland, Dep Environm Sci & Technol, College Pk, MD 20742 USA.
[Megonigal, J. Patrick] Smithsonian Environm Res Ctr, Edgewater, MD 21037 USA.
RP Needelman, BA (reprint author), Univ Maryland, Dep Environm Sci & Technol, College Pk, MD 20742 USA.
EM bneed@umd.edu
FU Maryland Sea Grant [NA10OAR4170072]
FX We thank the Maryland Sea Grant for funding this project (award no.
NA10OAR4170072). We also thank the staff at the Blackwater National
Wildlife Refuge, especially Suzanne Baird, Bill Giese, Matt Whitbeck,
Leticia Melendez, and Nate Carle, for their continuous suggestions,
support, assistance, and collaboration on the study. We are appreciative
of the field and lab work help received from members of the Soil and
Water Geospatial Analysis Lab (SAWGAL) at the University of Maryland
especially George Geatz, Michele Miller, Asia Vinnikova, Amanda
Garzio-Hadzick, Emily Hutchins, Becca Mead, Miriam Meyers, and Joey
Schlosnagle. We would also like to thank Don Cahoon, Glenn
Guntenspergen, and Jim Lynch of USGS Patuxent Wildlife Research Center
for collaborating throughout the study. We thank Dennis Skultety of te
Illinois Natural History survey for help with making the GIS maps in
this article.
NR 66
TC 1
Z9 2
U1 1
U2 36
PU SOIL SCI SOC AMER
PI MADISON
PA 677 SOUTH SEGOE ROAD, MADISON, WI 53711 USA
SN 0361-5995
J9 SOIL SCI SOC AM J
JI Soil Sci. Soc. Am. J.
PD SEP-OCT
PY 2013
VL 77
IS 5
BP 1852
EP 1864
DI 10.2136/sssaj2012.0272
PG 13
WC Soil Science
SC Agriculture
GA 220ZO
UT WOS:000324626600038
ER
PT J
AU Robertson, BA
Rehage, JS
Sih, A
AF Robertson, Bruce A.
Rehage, Jennifer S.
Sih, Andrew
TI Ecological novelty and the emergence of evolutionary traps
SO TRENDS IN ECOLOGY & EVOLUTION
LA English
DT Review
ID BEHAVIORAL SYNDROMES; ENVIRONMENTAL-CHANGE; HABITAT SELECTION; NATIVE
FROGS; CONSERVATION; LANDSCAPES; PREDATION; DYNAMICS; FOREST; FISH
AB Human-induced rapid environmental change (HIREC; e.g., climate change or exotic species) has caused global species declines. Although behavioral plasticity has buffered some species against HIREC, maladaptive behavioral scenarios called 'evolutionary traps' are increasingly common, threatening the persistence of affected species. Here, we review examples of evolutionary traps to identify their anthropogenic causes, behavioral mechanisms, and evolutionary bases, and to better forecast forms of HIREC liable to trigger traps. We summarize a conceptual framework for explaining the susceptibility of animals to traps that integrates the cost benefit approach of standard behavioral ecology with an evolutionary approach (reaction norms) to understanding cue response systems (signal detection). Finally, we suggest that a significant revision of conceptual thinking in wildlife conservation and management is needed to effectively eliminate and mitigate evolutionary traps.
C1 [Robertson, Bruce A.] Bard Coll, Div Sci Math & Comp, Annandale On Hudson, NY 12504 USA.
[Robertson, Bruce A.] Natl Zool Pk, Migratory Bird Ctr, Smithsonian Conservat Biol Inst, Washington, DC 20008 USA.
[Rehage, Jennifer S.] Florida Int Univ, Earth & Environm Dept, Southeast Environm Res Ctr, Miami, FL 33199 USA.
[Sih, Andrew] Univ Calif Davis, Dept Environm Sci & Policy, Davis, CA 95616 USA.
RP Robertson, BA (reprint author), Bard Coll, Div Sci Math & Comp, Annandale On Hudson, NY 12504 USA.
EM broberts@bard.edu
FU Bard College; Smithsonian Conservation Biology Institute; National
Science Foundation (NSF) [WSC-1204762]; Florida Coastal Everglades
Long-term Ecological Research (FCE LTER) program [NSF DBI-0620409]
FX B.A.R. was supported by funding from Bard College and the Smithsonian
Conservation Biology Institute. J.S.R. was supported by National Science
Foundation (NSF) WSC-1204762 and works in collaboration with the Florida
Coastal Everglades Long-term Ecological Research (FCE LTER) program (NSF
DBI-0620409).
NR 75
TC 70
Z9 70
U1 30
U2 243
PU ELSEVIER SCIENCE LONDON
PI LONDON
PA 84 THEOBALDS RD, LONDON WC1X 8RR, ENGLAND
SN 0169-5347
J9 TRENDS ECOL EVOL
JI Trends Ecol. Evol.
PD SEP
PY 2013
VL 28
IS 9
BP 552
EP 560
DI 10.1016/j.tree.2013.04.004
PG 9
WC Ecology; Evolutionary Biology; Genetics & Heredity
SC Environmental Sciences & Ecology; Evolutionary Biology; Genetics &
Heredity
GA 225PV
UT WOS:000324975700012
PM 23756104
ER
PT J
AU Newman, JA
Cooper, MC
Davis, M
Faber, SM
Coil, AL
Guhathakurta, P
Koo, DC
Phillips, AC
Conroy, C
Dutton, AA
Finkbeiner, DP
Gerke, BF
Rosario, DJ
Weiner, BJ
Willmer, CNA
Yan, RB
Harker, JJ
Kassin, SA
Konidaris, NP
Lai, K
Madgwick, DS
Noeske, KG
Wirth, GD
Connolly, AJ
Kaiser, N
Kirby, EN
Lemaux, BC
Lin, L
Lotz, JM
Luppino, GA
Marinoni, C
Matthews, DJ
Metevier, A
Schiavon, RP
AF Newman, Jeffrey A.
Cooper, Michael C.
Davis, Marc
Faber, S. M.
Coil, Alison L.
Guhathakurta, Puragra
Koo, David C.
Phillips, Andrew C.
Conroy, Charlie
Dutton, Aaron A.
Finkbeiner, Douglas P.
Gerke, Brian F.
Rosario, David J.
Weiner, Benjamin J.
Willmer, C. N. A.
Yan, Renbin
Harker, Justin J.
Kassin, Susan A.
Konidaris, N. P.
Lai, Kamson
Madgwick, Darren S.
Noeske, K. G.
Wirth, Gregory D.
Connolly, A. J.
Kaiser, N.
Kirby, Evan N.
Lemaux, Brian C.
Lin, Lihwai
Lotz, Jennifer M.
Luppino, G. A.
Marinoni, C.
Matthews, Daniel J.
Metevier, Anne
Schiavon, Ricardo P.
TI THE DEEP2 GALAXY REDSHIFT SURVEY: DESIGN, OBSERVATIONS, DATA REDUCTION,
AND REDSHIFTS
SO ASTROPHYSICAL JOURNAL SUPPLEMENT SERIES
LA English
DT Article
DE cosmology: observations; galaxies: distances and redshifts; galaxies:
evolution; galaxies: fundamental parameters; galaxies: high-redshift;
galaxies: statistics; large-scale structure of universe; methods: data
analysis; surveys
ID SIMILAR-TO 1; STAR-FORMING GALAXIES; DIGITAL SKY SURVEY; ACTIVE GALACTIC
NUCLEI; GROTH STRIP SURVEY; EXTRAGALACTIC LEGACY SURVEY;
SPITZER-SPACE-TELESCOPE; OPTICAL-ROTATION CURVES; COLOR-DENSITY
RELATION; TULLY-FISHER RELATION
AB We describe the design and data analysis of the DEEP2 Galaxy Redshift Survey, the densest and largest high-precision redshift survey of galaxies at z similar to 1 completed to date. The survey was designed to conduct a comprehensive census of massive galaxies, their properties, environments, and large-scale structure down to absolute magnitude M-B = -20 at z similar to 1 via similar to 90 nights of observation on the Keck telescope. The survey covers an area of 2.8 deg(2) divided into four separate fields observed to a limiting apparent magnitude of R-AB = 24.1. Objects with z less than or similar to 0.7 are readily identifiable using BRI photometry and rejected in three of the four DEEP2 fields, allowing galaxies with z > 0.7 to be targeted similar to 2.5 times more efficiently than in a purely magnitude-limited sample. Approximately 60% of eligible targets are chosen for spectroscopy, yielding nearly 53,000 spectra and more than 38,000 reliable redshift measurements. Most of the targets that fail to yield secure redshifts are blue objects that lie beyond z similar to 1.45, where the [O II] 3727 angstrom doublet lies in the infrared. The DEIMOS 1200 line mm(-1) grating used for the survey delivers high spectral resolution (R similar to 6000), accurate and secure redshifts, and unique internal kinematic information. Extensive ancillary data are available in the DEEP2 fields, particularly in the Extended Groth Strip, which has evolved into one of the richest multiwavelength regions on the sky. This paper is intended as a handbook for users of the DEEP2 Data Release 4, which includes all DEEP2 spectra and redshifts, as well as for the DEEP2 DEIMOS data reduction pipelines. Extensive details are provided on object selection, mask design, biases in target selection and redshift measurements, the spec2d two-dimensional data-reduction pipeline, the spec1d automated redshift pipeline, and the zspec visual redshift verification process, along with examples of instrumental signatures or other artifacts that in some cases remain after data reduction. Redshift errors and catastrophic failure rates are assessed through more than 2000 objects with duplicate observations. Sky subtraction is essentially photon-limited even under bright OH sky lines; we describe the strategies that permitted this, based on high image stability, accurate wavelength solutions, and powerful B-spline modeling methods. We also investigate the impact of targets that appear to be single objects in ground-based targeting imaging but prove to be composite in Hubble Space Telescope data; they constitute several percent of targets at z similar to 1, approaching similar to 5%-10% at z > 1.5. Summary data are given that demonstrate the superiority of DEEP2 over other deep high-precision redshift surveys at z similar to 1 in terms of redshift accuracy, sample number density, and amount of spectral information. We also provide an overview of the scientific highlights of the DEEP2 survey thus far.
C1 [Newman, Jeffrey A.; Matthews, Daniel J.] Univ Pittsburgh, Dept Phys & Astron, Pittsburgh, PA 15260 USA.
[Cooper, Michael C.] Univ Calif Irvine, Dept Phys & Astron, Ctr Galaxy Evolut, Irvine, CA 92697 USA.
[Davis, Marc; Madgwick, Darren S.] Univ Calif Berkeley, Dept Phys & Astron, Berkeley, CA 94720 USA.
[Faber, S. M.; Guhathakurta, Puragra; Koo, David C.; Phillips, Andrew C.; Conroy, Charlie; Harker, Justin J.; Lai, Kamson] Univ Calif Santa Cruz, UCO Lick Observ, Santa Cruz, CA 95064 USA.
[Coil, Alison L.] Univ Calif San Diego, Dept Phys, La Jolla, CA 92093 USA.
[Conroy, Charlie; Finkbeiner, Douglas P.] Harvard Univ, Harvard Smithsonian Ctr Astrophys, Cambridge, MA 02138 USA.
[Dutton, Aaron A.] Max Planck Inst Astron, D-69117 Heidelberg, Germany.
[Gerke, Brian F.] Univ Calif Berkeley, Lawrence Berkeley Natl Lab, Berkeley, CA 94720 USA.
[Rosario, David J.] Max Planck Inst Extraterr Phys, D-85748 Garching, Germany.
[Weiner, Benjamin J.; Willmer, C. N. A.] Univ Arizona, Steward Observ, Tucson, AZ 85721 USA.
[Yan, Renbin] Univ Kentucky, Dept Phys & Astron, Lexington, KY 40506 USA.
[Kassin, Susan A.] NASA, Goddard Space Flight Ctr, Astrophys Sci Div, Greenbelt, MD 20771 USA.
[Kassin, Susan A.; Noeske, K. G.; Lotz, Jennifer M.] CALTECH, Dept Astron, Pasadena, CA 91125 USA.
[Konidaris, N. P.; Kirby, Evan N.] Space Telescope Sci Inst, Baltimore, MD 21218 USA.
[Wirth, Gregory D.] Keck Observ, Kamuela, HI 96743 USA.
[Connolly, A. J.] Univ Washington, Dept Astron, Seattle, WA 98195 USA.
[Kaiser, N.; Luppino, G. A.] Univ Hawaii, Inst Astron, Honolulu, HI 96822 USA.
[Lemaux, Brian C.] Lab Astrophys Marseille, Marseilles, France.
[Lin, Lihwai] Acad Sinica, Inst Astron & Astrophys, Taipei 106, Taiwan.
[Marinoni, C.] Ctr Phys Theor Marseilles, Marseilles, France.
[Metevier, Anne] Sonoma State Univ, Dept Phys & Astron, Rohnert Pk, CA 94928 USA.
[Schiavon, Ricardo P.] Liverpool John Moores Univ, Astrophys Res Inst, Wirral H41 1LD, Merseyside, England.
RP Newman, JA (reprint author), Univ Pittsburgh, Dept Phys & Astron, Pittsburgh, PA 15260 USA.
EM janewman@pitt.edu; m.cooper@uci.edu; mdavis@berkeley.edu;
faber@ucolick.org; acoil@ucsd.edu; raja@ucolick.org; koo@ucolick.org;
phillips@ucolick.org; cconroy@cfa.harvard.edu; dutton@mpia.de;
dfinkbeiner@cfa.harvard.edu; bfgerke@lbl.gov; rosario@mpe.mpg.de;
bjw@as.arizona.edu; cnaw@as.arizona.edu; yanrenbin@gmail.com;
jharker@ucolick.org; susan.kassin@nasa.gov; npk@astro.caltech.edu;
klai@ucolick.org; noeske@stsci.edu; wirth@keck.hawaii.edu;
ajc@astro.washington.edu; kaiser@ifa.hawaii.edu; enk@astro.caltech.edu;
brian.lemaux@oamp.fr; lihwailin@asiaa.sinica.edu.tw; lotz@stsci.edu;
ger@ifa.hawaii.edu; marinoni@cpt.univ-mrs.fr; djm70@pitt.edu;
ajmetevier@gmail.com; R.P.Schiavon@ljmu.ac.uk
OI Weiner, Benjamin/0000-0001-6065-7483; Kirby, Evan/0000-0001-6196-5162
FU NSF Center for Particle Astrophysics; National Science Foundation [AST
95-29098, 00-711098, 05-07483, 08-08133, AST 00-71048, 05-07428,
08-07630, 08-06732, ARI 92-14621]; NASA [HST-AR-01947]; NASA through
Hubble Fellowship [51256.01, 51269.01, NAS 5-26555]; Space Telescope
Science Institute; CARA; Hubble Fellowships; Hubble Fellowship; Spitzer
Fellowship; W. M. Keck Foundation; University of California; NASA;
California Association for Research in Astronomy (Keck Observatory);
University of California/Lick Observatory
FX The DEEP2 survey was initiated under the auspices of the NSF Center for
Particle Astrophysics. Major grant support was provided by National
Science Foundation grants AST 95-29098, 00-711098, 05-07483, and
08-08133 to UCSC, AST 00-71048, 05-07428, and 08-07630 to UCB, and
08-06732 to the University of Pittsburgh. Computing hardware used to
analyze DEEP2 data was provided by Sun Microsystems. The HST ACS imaging
mosaic in EGS was constructed by Anton Koekemoer and Jennifer Lotz and
was funded by grant HST-AR-01947 from NASA. NASA imaging of the original
Groth Strip was planned and executed by Ed Groth and Jason Rhodes with
support from NAS5-1661 and NAG5-6279 to the WFPC1 IDT. Support for this
work was provided by NASA through Hubble Fellowship grants 51256.01 and
51269.01 awarded to E.N.K. and M.C.C., respectively, by the Space
Telescope Science Institute, which is operated by the Association of
Universities for Research in Astronomy, Inc., for NASA, under contract
NAS 5-26555. Sandra Faber thank CARA for a generous research grant and
the Miller Institute at UC Berkeley for a Visiting Miller Professorship,
during which much of this paper was written. Jeffrey Newman and Alison
Coil acknowledge support from Hubble Fellowships during their DEEP2
work, and Michael Cooper acknowledges support from both Hubble and
Spitzer Fellowships.; Thanks are due to the many institutions and
individuals who have made the DEEP2 survey possible. First thanks go to
the W. M. Keck Foundation, the University of California, and NASA for
providing funds to construct and operate the Keck telescopes. Second, we
wish to thank the technical teams in the UCO/Lick Shops and at Keck
Observatory for their role in building and commissioning the DEIMOS
spectrograph and for their superb support during many observing runs.
Funds for the spectrograph were provided by instrumentation grant ARI
92-14621 from the National Science Foundation and instrument funds from
the California Association for Research in Astronomy (Keck Observatory)
and from the University of California/Lick Observatory.
NR 156
TC 181
Z9 181
U1 2
U2 13
PU IOP PUBLISHING LTD
PI BRISTOL
PA TEMPLE CIRCUS, TEMPLE WAY, BRISTOL BS1 6BE, ENGLAND
SN 0067-0049
EI 1538-4365
J9 ASTROPHYS J SUPPL S
JI Astrophys. J. Suppl. Ser.
PD SEP
PY 2013
VL 208
IS 1
AR UNSP 5
DI 10.1088/0067-0049/208/1/5
PG 57
WC Astronomy & Astrophysics
SC Astronomy & Astrophysics
GA 214XS
UT WOS:000324172700005
ER
PT J
AU Ratnayake, R
Liu, YX
Paul, VJ
Luesch, H
AF Ratnayake, Ranjala
Liu, Yanxia
Paul, Valerie J.
Luesch, Hendrik
TI Cultivated Sea Lettuce is a Multiorgan Protector from Oxidative and
Inflammatory Stress by Enhancing the Endogenous Antioxidant Defense
System
SO CANCER PREVENTION RESEARCH
LA English
DT Article
ID LOS-ANGELES-COUNTY; PROSTATE-CANCER; RESPONSE ELEMENT; UNITED-STATES;
ULVA-LACTUCA; SAITAMA PREFECTURE; ENZYME INDUCERS; MARINE-ALGAE;
IN-VITRO; CELLS
AB The health-promoting effects of seaweeds have been linked to antioxidant activity that may counteract cancer-causing oxidative stress-induced damage and inflammation. Although antioxidant activity is commonly associated with direct radical scavenging activity, an alternative way to increase the antioxidant status of a cell is to enhance the endogenous (phase II) defense system consisting of cytoprotective antioxidant enzymes, including NAD(P)H:quinone oxidoreductase 1 (NQO1). These enzymes are transcriptionally regulated by the antioxidant response element (ARE) via the transcription factor Nrf2. Extracts derived from cultivated Ulva sp., a green alga regarded as a marine vegetable (sea lettuce), potently activated the Nrf2-ARE pathway in IMR-32 neuroblastoma and LNCaP prostate cancer cells. RNA interference studies showed that Nrf2 and phosphoinositide 3-kinase (PI3K) are essential for the phase II response in IMR-32 cells. Activity-enriched fractions induced Nrf2 nuclear translocation and target gene transcription, and boosted the cellular glutathione level and therefore antioxidant status. A single-dose gavage feeding of Ulva-derived fractions increased Nqo1 transcript levels in various organs. Nqo1 induction spiked in different tissues, depending on the specific chemical composition of each administered fraction. We purified and characterized four ARE inducers in this extract, including loliolide (1), isololiolide (2), a megastigmen (3), and a novel chlorinated unsaturated aldehyde (4). The ARE-active fractions attenuated lipopolysaccharide-induced iNOS and Cox2 gene expression in macrophagic RAW264.7 cells, decreasing nitric oxide (NO) and prostaglandin E2 (PGE(2)) production, respectively. Nqo1 activity and NO production were abrogated in nrf2(-/-) mouse embryonic fibroblasts, providing a direct link between the induction of phase II response and anti-inflammatory activity. Cancer Prev Res; 6(9); 989-99. (C)2013 AACR.
C1 [Ratnayake, Ranjala; Liu, Yanxia; Luesch, Hendrik] Univ Florida, Dept Med Chem, Gainesville, FL 32610 USA.
[Paul, Valerie J.] Smithsonian Marine Stn, Ft Pierce, FL USA.
RP Luesch, H (reprint author), Univ Florida, 1600 SW Archer Rd,POB 100485, Gainesville, FL 32610 USA.
EM luesch@cop.ufl.edu
FU NIH, NCI [R21CA133681]
FX This study was supported by NIH, NCI Grant R21CA133681.
NR 50
TC 3
Z9 3
U1 3
U2 29
PU AMER ASSOC CANCER RESEARCH
PI PHILADELPHIA
PA 615 CHESTNUT ST, 17TH FLOOR, PHILADELPHIA, PA 19106-4404 USA
SN 1940-6207
EI 1940-6215
J9 CANCER PREV RES
JI Cancer Prev. Res.
PD SEP
PY 2013
VL 6
IS 9
BP 989
EP 999
DI 10.1158/1940-6207.CAPR-13-0014
PG 11
WC Oncology
SC Oncology
GA 214XH
UT WOS:000324171000012
PM 24005795
ER
PT J
AU Sharma, S
Dutta, T
Maldonado, JE
Wood, TC
Panwar, HS
Seidensticker, J
AF Sharma, Sandeep
Dutta, Trishna
Maldonado, Jesus E.
Wood, Thomas C.
Panwar, Hemendra Singh
Seidensticker, John
TI A highly informative microsatellite panel for individual identification
and sex determination of jungle cats (Felis chaus)
SO CONSERVATION GENETICS RESOURCES
LA English
DT Article
DE Noninvasive DNA sampling; Felis chaus; Individual identification;
Microsatellite; Sex assignment
ID COMPUTER-PROGRAM; SAMPLES; SOFTWARE
AB The jungle cat (Felis chaus), a small-sized felid, is distributed across Southeast and South Asia to Egypt in Africa. In India, it is one of the most common small cat species but no reliable methods are available to monitor its population status. We describe a non-invasive genetic monitoring technique using fecal samples for individual identification and sex determination of jungle cats. We evaluated 21 feline microsatellites and optimized a panel of 11 highly polymorphic microsatellite loci that yield a cumulative Probability of Identity between siblings value of 5.51x10(-6). We used this panel to identify 110 individuals from 118 jungle cat scats collected from tiger reserves in Central India. We identified 22 males and 35 females by amplifying a fragment of the Amelogenin protein gene. This panel will be helpful to study genetic structure, gene flow, relatedness, sex ratio, and population estimation in jungle cats.
C1 [Sharma, Sandeep; Dutta, Trishna; Maldonado, Jesus E.; Seidensticker, John] Smithsonian Conservat Biol Inst, Natl Zool Pk, Washington, DC 20013 USA.
[Sharma, Sandeep; Dutta, Trishna; Maldonado, Jesus E.; Wood, Thomas C.] George Mason Univ, Dept Environm Sci & Policy, Fairfax, VA 22030 USA.
RP Sharma, S (reprint author), Smithsonian Conservat Biol Inst, Natl Zool Pk, 3001-7012 Connecticut Ave NW, Washington, DC 20013 USA.
EM sandeeps17@gmail.com
FU Smithsonian Conservation Biology Institute (SCBI); Kathryn Fuller
science for nature fund of World Wildlife Fund (WWF); International Bear
Association; George Mason University
FX Funding was provided by the Smithsonian Conservation Biology Institute
(SCBI), Friends of the National Zoo, Kathryn Fuller science for nature
fund of World Wildlife Fund (WWF), International Bear Association, and
George Mason University. We thank the Principal Chief Conservator of
Forests (PCCF) Wildlife, Madhya Pradesh and Maharashtra, and field
directors and staff of all five tiger reserves (Kanha, Satpura, Melghat,
Pench MP and Mh) for providing research permissions and logistical help.
We thank Robert Fleischer, Center for Conservation and Evolutionary
Genetics, SCBI, and Yogesh S. Shouche, National Center for Cell Sciences
(NCCS), Pune, Maharashtra, India, for providing laboratory space and
facilitating lab work; Nancy Rotzel, Libby Dougan, and Hitendra Munot
for logistical support, and Susan Lumpkin for editorial comments. We
also thank two anonymous reviewers for suggestions that greatly improved
the quality of this manuscript.
NR 17
TC 1
Z9 1
U1 9
U2 42
PU SPRINGER
PI DORDRECHT
PA VAN GODEWIJCKSTRAAT 30, 3311 GZ DORDRECHT, NETHERLANDS
SN 1877-7252
EI 1877-7260
J9 CONSERV GENET RESOUR
JI Conserv. Genet. Resour.
PD SEP
PY 2013
VL 5
IS 3
BP 863
EP 866
DI 10.1007/s12686-013-9873-0
PG 4
WC Biodiversity Conservation; Genetics & Heredity
SC Biodiversity & Conservation; Genetics & Heredity
GA 194GT
UT WOS:000322619900062
ER
PT J
AU Pisano, DA
AF Pisano, Dominick A.
TI Blue Sky Metropolis: The Aerospace Century in Southern California
SO JOURNAL OF AMERICAN HISTORY
LA English
DT Book Review
C1 [Pisano, Dominick A.] Smithsonian Inst, Natl Air & Space Museum, Washington, DC 20560 USA.
RP Pisano, DA (reprint author), Smithsonian Inst, Natl Air & Space Museum, Washington, DC 20560 USA.
NR 1
TC 0
Z9 0
U1 0
U2 0
PU ORGANIZATION AMER HISTORIANS
PI BLOOMINGTON
PA 112 N BRYAN ST, BLOOMINGTON, IN 47408 USA
SN 0021-8723
J9 J AM HIST
JI J. Am. Hist.
PD SEP
PY 2013
VL 100
IS 2
BP 600
EP 600
DI 10.1093/jahist/jat234
PG 1
WC History
SC History
GA 205EI
UT WOS:000323424600147
ER
PT J
AU Huang, YM
Rueda, LM
AF Huang, Yiau-Min
Rueda, Leopoldo M.
TI A NEW SPECIES OF THE GENUS ORTHOPODOMYIA FROM OTOTOMO, CAMEROON, WITH
NOTES ON OTHER ORTHOPODOMYIA GROUP-SPECIES
SO JOURNAL OF THE AMERICAN MOSQUITO CONTROL ASSOCIATION
LA English
DT Article
DE Orthopodomyia ototomoensis; Ototomoensis Group; Nkolbissonensis Group;
morphology; Cameroon
AB A new species belonging to the new Ototomoensis Group, Orthopodomyia ototomoensis Huang and Rueda, is described from Ototomo, Cameroon. Diagnostic features for separating members of Nkolbissonensis Group and Ototomoensis Group from other Orthopodomyia groups are provided. Two supplemental keys are presented: "A Pictorial Key to the Species of the Genus Orthopodomyia Ototomoensis Group in the Afrotropical Region (Diptera: Culicidae)" and "A Pictorial Key to the Species of the Genus Orthopodomyia Nkolbissonensis Group in the Afrotropical Region (Diptera: Culicidae).''
C1 [Huang, Yiau-Min] Smithsonian Inst, Dept Entomol, Washington, DC 20013 USA.
[Rueda, Leopoldo M.] Walter Reed Army Inst Res, Entomol Branch, Walter Reed Biosystemat Unit, Silver Spring, MD 20910 USA.
RP Huang, YM (reprint author), Smithsonian Inst, Dept Entomol, POB 37012,MSC C1109,MRC 534, Washington, DC 20013 USA.
NR 12
TC 1
Z9 1
U1 0
U2 1
PU AMER MOSQUITO CONTROL ASSOC
PI MOUNT LAUREL
PA 15000 COMMERCE PARKWAY, SUITE C, MOUNT LAUREL, NJ 08054 USA
SN 8756-971X
EI 1943-6270
J9 J AM MOSQUITO CONTR
JI J. Am. Mosq. Control Assoc.
PD SEP
PY 2013
VL 29
IS 3
BP 270
EP 274
PG 5
WC Entomology
SC Entomology
GA 217SJ
UT WOS:000324380600007
PM 24199501
ER
PT J
AU Sues, HD
Schoch, RR
AF Sues, Hans-Dieter
Schoch, Rainer R.
TI ANATOMY AND PHYLOGENETIC RELATIONSHIPS OF CALAMOPS PALUDOSUS
(TEMNOSPONDYLI, STEREOSPONDYLI) FROM THE TRIASSIC OF THE NEWARK BASIN,
PENNSYLVANIA
SO JOURNAL OF VERTEBRATE PALEONTOLOGY
LA English
DT Article
ID MIDDLE; MICROPOSAURUS; AMPHIBIANS
AB The holotype of the large temnospondyl Calamops paludosus is the oldest known tetrapod fossil from the Triassic of the Newark basin in Pennsylvania. Although it is usually placed in Metoposauridae, its affinities have remained unknown since its original description because the unique specimen had never been prepared. Preparation and casting of the specimen, which comprises three pieces of a left mandibular ramus, now permits detailed anatomical description of the jaw and assessment of its affinities. Calamops paludosus is a valid taxon of trematosauroid temnospondyls that can be diagnosed by several autapomorphies. It represents one of the geologically youngest known records of long-snouted trematosaurs and the first record of these temnospondyls from the Late Triassic of North America.
C1 [Sues, Hans-Dieter] Natl Museum Nat Hist, Dept Paleobiol, Smithsonian Inst, Washington, DC 20013 USA.
[Schoch, Rainer R.] Staatliches Museum Nat Kunde Stuttgart, D-70191 Stuttgart, Germany.
RP Sues, HD (reprint author), Natl Museum Nat Hist, Dept Paleobiol, Smithsonian Inst, MRC 121,POB 37012, Washington, DC 20013 USA.
EM suesh@si.edu; rainer.schoch@smns-bw.de
FU Alexander von Humboldt Foundation
FX We are indebted to the late D. Baird for the casts of Calamops paludosus
and associated data, A. D. Lewis for his excellent preparation work, and
P. E. Olsen for many informative discussions on the geology and
paleontology of the Newark Supergroup. H.-D.S. gratefully acknowledges
an Award for Excellence in Research and Teaching from the Alexander von
Humboldt Foundation. We thank J.-S. Steyer and especially A. Warren for
helpful comments on the manuscript.
NR 38
TC 2
Z9 2
U1 0
U2 4
PU TAYLOR & FRANCIS INC
PI PHILADELPHIA
PA 325 CHESTNUT ST, SUITE 800, PHILADELPHIA, PA 19106 USA
SN 0272-4634
J9 J VERTEBR PALEONTOL
JI J. Vertebr. Paleontol.
PD SEP 1
PY 2013
VL 33
IS 5
BP 1061
EP 1070
DI 10.1080/02724634.2013.759120
PG 10
WC Paleontology
SC Paleontology
GA 213GH
UT WOS:000324042900005
ER
PT J
AU Mikheyev, AS
McBride, CS
Mueller, UG
Parmesan, C
Smee, MR
Stefanescu, C
Wee, B
Singer, MC
AF Mikheyev, Alexander S.
McBride, Carolyn S.
Mueller, Ulrich G.
Parmesan, Camille
Smee, Melanie R.
Stefanescu, Constanti
Wee, Brian
Singer, Michael C.
TI Host-associated genomic differentiation in congeneric butterflies: now
you see it, now you do not
SO MOLECULAR ECOLOGY
LA English
DT Article
DE Castilleja; Collinsia; Lonicera; Nymphalidae; Pedicularis; Succisa
ID PARTIAL MANTEL TESTS; ADAPTIVE GENETIC-DIVERGENCE; LONG-DISTANCE
DISPERSAL; APPLE MAGGOT FLY; ECOLOGICAL SPECIATION; EUPHYDRYAS-EDITHA;
LOCAL ADAPTATION; CHECKERSPOT BUTTERFLIES; REPRODUCTIVE ISOLATION;
SYMPATRIC SPECIATION
AB Ecotypic variation among populations may become associated with widespread genomic differentiation, but theory predicts that this should happen only under particular conditions of gene flow, selection and population size. In closely related species, we might expect the strength of host-associated genomic differentiation (HAD) to be correlated with the degree of phenotypic differentiation in host-adaptive traits. Using microsatellite and Amplified Fragment Length Polymorphism (AFLP) markers, and controlling for isolation by distance between populations, we sought HAD in two congeneric species of butterflies with different degrees of host plant specialization. Prior work on Euphydryas editha had shown strong interpopulation differentiation in host-adapted traits, resulting in incipient reproductive isolation among host-associated ecotypes. We show here that Euphydryas aurinia had much weaker host-associated phenotypic differentiation. Contrary to our expectations, we detected HAD in Euphydryas aurinia, but not in E.editha. Even within an E.aurinia population that fed on both hosts, we found weak but significant sympatric HAD that persisted in samples taken 9years apart. The finding of significantly stronger HAD in the system with less phenotypic differentiation may seem paradoxical. Our findings can be explained by multiple factors, ranging from differences in dispersal or effective population size, to spatial variation in genomic or phenotypic traits and to structure induced by past histories of host-adapted populations. Other infrequently measured factors, such as differences in recombination rates, may also play a role. Our result adds to recent work as a further caution against assumptions of simple relationships between genomic and adaptive phenotypic differentiation.
C1 [Mikheyev, Alexander S.] Okinawa Inst Sci & Technol, Okinawa 9040495, Japan.
[McBride, Carolyn S.] Rockefeller Univ, Lab Neurogenet & Behav, New York, NY 10021 USA.
[Mueller, Ulrich G.; Parmesan, Camille; Singer, Michael C.] Univ Texas Austin, Austin, TX 78712 USA.
[Parmesan, Camille] Univ Plymouth, Inst Marine, Plymouth PL4 8AA, Devon, England.
[Smee, Melanie R.] Univ York, Dept Biol, York YO10 5DD, N Yorkshire, England.
[Stefanescu, Constanti] Museo Ciencies Nat, Catalan Butterfly Monitoring Scheme, Granollers 08402, Spain.
[Stefanescu, Constanti] CREAF, Global Ecol Unit, Cerdanyola Del Valles 08193, Spain.
[Wee, Brian] Smithsonian Inst, NEON Inc, Washington, DC 20560 USA.
[Singer, Michael C.] Univ Plymouth, Sch Biomed & Biol Sci, Plymouth PL4 8AA, Devon, England.
RP Mikheyev, AS (reprint author), Okinawa Inst Sci & Technol, Okinawa 9040495, Japan.
EM sasha@homologo.us
RI Mikheyev, Alexander/O-7670-2014; Smee, Melanie/K-4201-2015
OI Mikheyev, Alexander/0000-0003-4369-1019; Smee,
Melanie/0000-0002-6973-0365
FU San Diego Foundation; NSF [DEB-0215436, DEB-0815145]; Ulrich Mueller;
Okinawa Institute of Science and Technology; Howard Hughes Medical
Institute
FX We are most grateful to Jordi Artola, Agnes Batlle, Rafel Carbonell,
Henri Descimon, Juexin Jiang, Mark Kirkpatrick, Michael Lockwood, James
Mallet, Toni Marine, Joan Strassman, Tanya Vo and Chris Wheat. Funding
was provided by the authors, by the San Diego Foundation and by NSF
DEB-0215436 to MCS and Ulrich Mueller and by the Okinawa Institute of
Science and Technology. CSM was supported by NSF DEB-0815145 to Michael
Turelli during the early stages of this work and by the Howard Hughes
Medical Institute.
NR 90
TC 6
Z9 6
U1 4
U2 48
PU WILEY-BLACKWELL
PI HOBOKEN
PA 111 RIVER ST, HOBOKEN 07030-5774, NJ USA
SN 0962-1083
J9 MOL ECOL
JI Mol. Ecol.
PD SEP
PY 2013
VL 22
IS 18
BP 4753
EP 4766
DI 10.1111/mec.12423
PG 14
WC Biochemistry & Molecular Biology; Ecology; Evolutionary Biology
SC Biochemistry & Molecular Biology; Environmental Sciences & Ecology;
Evolutionary Biology
GA 212ZP
UT WOS:000324022600013
PM 23927539
ER
PT J
AU Hayasaki, K
Stone, N
Loeb, A
AF Hayasaki, Kimitake
Stone, Nicholas
Loeb, Abraham
TI Finite, intense accretion bursts from tidal disruption of stars on bound
orbits
SO MONTHLY NOTICES OF THE ROYAL ASTRONOMICAL SOCIETY
LA English
DT Article
DE accretion; accretion discs; black hole physics; gravitational waves;
hydrodynamics
ID MASSIVE BLACK-HOLE; CENTER CLOUD G2; X-RAY OUTBURSTS; GALACTIC-CENTER;
STELLAR DISRUPTION; BINARIES; NUCLEI; DISKS; SIMULATIONS; SYSTEMS
AB We study accretion processes for tidally disrupted stars approaching supermassive black holes on bound orbits, by performing three-dimensional smoothed particle hydrodynamics simulations with a pseudo-Newtonian potential. We find that there is a critical value of the orbital eccentricity below which all the stellar debris remains bound to the black hole. For high but subcritical eccentricities, all the stellar mass is accreted on to the black hole in a finite time, causing a significant deviation from the canonical t(-5/3) mass fallback rate. When a star is on a moderately eccentric orbit and its pericentre distance is deeply inside the tidal disruption radius, there can be several orbit crossings of the debris streams due to relativistic precession. This dissipates orbital energy in shocks, allowing for rapid circularization of the debris streams and formation of an accretion disc. The resultant accretion rate greatly exceeds the Eddington rate and differs strongly from the canonical rate of t(-5/3). By contrast, there is little dissipation due to orbital crossings for the equivalent simulation with a purely Newtonian potential. This shows that general relativistic precession is crucial for accretion disc formation via circularization of stellar debris from stars on moderately eccentric orbits.
C1 [Hayasaki, Kimitake] Kyoto Univ, Dept Astron, Sakyo Ku, Kyoto 6068502, Japan.
[Hayasaki, Kimitake; Stone, Nicholas; Loeb, Abraham] Harvard Smithsonian Ctr Astrophys, Cambridge, MA 02138 USA.
[Hayasaki, Kimitake] Korea Astron & Space Sci Inst, Taejon 305348, South Korea.
RP Hayasaki, K (reprint author), Kyoto Univ, Dept Astron, Sakyo Ku, Kitashirakawa Oiwake Cho, Kyoto 6068502, Japan.
EM kimi@kusastro.kyoto-u.ac.jp
RI Hayasaki, Kimitake/B-3192-2015
OI Hayasaki, Kimitake/0000-0003-4799-1895
FU Ministry of Education, Science, Culture, and Sport and Technology
[21540304, 22340045, 22540243, 23540271]; Education and Research
Promotion Foundation in Kyoto University; NSF [AST-0907890]; NASA
[NNX08AL43G, NNA09DB30A]
FX The authors thank to the anonymous referee for fruitful comments and
suggestions, and thank to Ramesh Narayan for helpful discussions about
the recent G2 problem. KH is also grateful to Atsuo. T Okazaki, Takahiro
Tanaka and Shin Mineshige for helpful discussions and their continuous
encouragement. The numerical simulations reported here were performed
using the computer facilities of Yukawa Institute of Theoretical
Physics, Kyoto University and Harvard-Smithsonian Center for
Astrophysics, Harvard University. This work was supported in part by the
Grants-in-Aid of the Ministry of Education, Science, Culture, and Sport
and Technology [21540304, 22340045, 22540243, 23540271 KH], Education
and Research Promotion Foundation in Kyoto University [KH], and NSF
grant AST-0907890 and NASA grants NNX08AL43G and NNA09DB30A [NS, AL].
NR 68
TC 39
Z9 39
U1 0
U2 2
PU OXFORD UNIV PRESS
PI OXFORD
PA GREAT CLARENDON ST, OXFORD OX2 6DP, ENGLAND
SN 0035-8711
J9 MON NOT R ASTRON SOC
JI Mon. Not. Roy. Astron. Soc.
PD SEP
PY 2013
VL 434
IS 2
BP 909
EP 924
DI 10.1093/mnras/stt871
PG 16
WC Astronomy & Astrophysics
SC Astronomy & Astrophysics
GA 207XO
UT WOS:000323638200001
ER
PT J
AU Fu, J
Kauffmann, G
Huang, ML
Yates, RM
Moran, S
Heckman, TM
Dave, R
Guo, Q
Henriques, BMB
AF Fu, Jian
Kauffmann, Guinevere
Huang, Mei-ling
Yates, Robert M.
Moran, Sean
Heckman, Timothy M.
Dave, Romeel
Guo, Qi
Henriques, Bruno M. B.
TI Star formation and metallicity gradients in semi-analytic models of disc
galaxy formation
SO MONTHLY NOTICES OF THE ROYAL ASTRONOMICAL SOCIETY
LA English
DT Article
DE stars: formation; ISM: atoms; ISM: molecules; galaxies: evolution;
galaxies: formation; galaxies: ISM
ID GALACTIC ABUNDANCE GRADIENT; TO-MOLECULAR TRANSITION; IRAM LEGACY
SURVEY; RADIAL GAS-FLOWS; PROBE WMAP OBSERVATIONS; I MASS FUNCTION;
MILKY-WAY DISK; CHEMICAL EVOLUTION; H-I; NEARBY GALAXIES
AB We have updated our radially resolved semi-analytic models (SAMs) of galaxy formation, which track both the atomic and molecular gas phases of the interstellar medium. The models are adapted from those of Guo et al. using similar methodology as by Fu et al. and are run on halo merger trees from the Millennium and Millennium-II simulations with the following main changes. (1) We adopt a simple star formation law Sigma(SFR) Sigma(H2). (2) We inject the heavy elements produced by supernovae directly into the halo hot gas, instead of first mixing them with the cold gas in the disc. (3) We include radial gas inflows in discs using a model of the form v(inflow) = alpha r. The models are used to study the radial profiles of star formation rate and gas-phase metallicity in present-day galaxies. The surface density profiles of molecular gas in L-* galaxies place strong constraints on inflow velocities, favouring models where v(inflow) similar to 7 km s(-1) at a galactocentric radius of 10 kpc. Radial gas inflow has little influence on gas-phase and stellar metallicity gradients, which are affected much more strongly by the fraction of metals that are directly injected into the halo gas, rather than mixed with the cold gas. Metals ejected out of the galaxy in early epochs result in late infall of pre-enriched gas and flatter present-day gas-phase metallicity gradients. A prescription in which 80 per cent of the metals are injected into the halo gas results in good fits to the flat observed metallicity gradients in galaxies with stellar masses greater than 10(10) M-circle dot, as well as the relations between gas-phase metallicity and specific star formation rate in the outer parts of galactic discs. We examine the correlation between the gas-phase metallicity gradient and global galaxy properties, finding that it is most strongly correlated with the bulge-to-total ratio of the galaxy. This is because gas is consumed when the bulge forms during galaxy mergers, and the gas-phase metallicity gradient is then set by newly accreted gas.
C1 [Fu, Jian; Kauffmann, Guinevere; Huang, Mei-ling; Yates, Robert M.; Henriques, Bruno M. B.] Max Planck Inst Astrophys, D-85741 Garching, Germany.
[Fu, Jian] Chinese Acad Sci, Shanghai Astron Observ, Key Lab Res Galaxies & Cosmol, Shanghai 200030, Peoples R China.
[Moran, Sean] Harvard Smithsonian Ctr Astrophys, Cambridge, MA 02138 USA.
[Heckman, Timothy M.] Johns Hopkins Univ, Dept Phys & Astron, Baltimore, MD 21218 USA.
[Dave, Romeel] Univ Arizona, Dept Astron, Tucson, AZ 85721 USA.
[Guo, Qi] Univ Durham, Inst Computat Cosmol, Dept Phys, Durham DH1 3LE, England.
[Guo, Qi] Chinese Acad Sci, Natl Astron Observ, Beijing 100012, Peoples R China.
RP Fu, J (reprint author), Max Planck Inst Astrophys, D-85741 Garching, Germany.
EM fujian@mpa-garching.mpg.de
OI Henriques, Bruno/0000-0002-1392-489X
FU National Science Foundation of China [11173044]; Shanghai Committee of
Science and Technology [12ZR1452700]
FX We are grateful to the comments from the anonymous referee. JF
acknowledges the support from the National Science Foundation of China
No. 11173044 and the Shanghai Committee of Science and Technology grant
No. 12ZR1452700.
NR 110
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U1 0
U2 2
PU OXFORD UNIV PRESS
PI OXFORD
PA GREAT CLARENDON ST, OXFORD OX2 6DP, ENGLAND
SN 0035-8711
EI 1365-2966
J9 MON NOT R ASTRON SOC
JI Mon. Not. Roy. Astron. Soc.
PD SEP
PY 2013
VL 434
IS 2
BP 1531
EP 1548
DI 10.1093/mnras/stt1117
PG 18
WC Astronomy & Astrophysics
SC Astronomy & Astrophysics
GA 207XO
UT WOS:000323638200046
ER
PT J
AU McGarvey, JC
Bourg, NA
Thompson, JR
McShea, WJ
Shen, XL
AF McGarvey, Jennifer C.
Bourg, Norman A.
Thompson, Jonathan R.
McShea, William J.
Shen, Xiaoli
TI Effects of Twenty Years of Deer Exclusion on Woody Vegetation at Three
Life-History Stages in a Mid-Atlantic Temperate Deciduous Forest
SO NORTHEASTERN NATURALIST
LA English
DT Article
ID WHITE-TAILED DEER; ODOCOILEUS-VIRGINIANUS ZIMMERMAN; BROWSING PRESSURE;
ACORN CROPS; GREAT-LAKES; SUGAR MAPLE; GROWTH; PLANT; USA; REGENERATION
AB Chronic browsing by Odocoileus virginianus (White-tailed Deer) has potential to alter the life history of trees within Mid-Atlantic forests, including seedling size and abundance in the short term to overstory composition in the long term. Most studies quantify the effects of deer browse using small plots (<1 ha) and short time frames (<10 years), which may misrepresent larger-scale and longer-term impacts. We maintained a 4-ha deer exclusion plot for 20 years in a mesic northern Virginia temperate deciduous forest to examine the impacts of browsing on forest trees at multiple life-history stages. We compared the abundance and species composition, as well as seedling height, of woody stems across the seedling, small-sapling, and large-sapling size classes inside the deer exclosure and within an adjacent reference area. There were no significant differences in seedling abundance or community composition, but seedling height was on average 2.25 times greater in the exclosure than the reference plot. Small-sapling (1-5 cm DBH) stem count was 4.1 times greater inside the exclosure, with all species more abundant in the exclosure except Asimina triloba (Pawpaw) and Carya tomentosa (Mockernut Hickory). Differences were smaller in the large-sapling size class (5-10 cm DBH), with relative total large-sapling stem count only 1.25 times greater in the exclosure. Browsing pressure appeared to influence the composition and size structure of smaller stems in the past 20 years, but has had little effect on larger stems. While the lack of replication limited the scope of inference of our study, our findings suggest that natural delays in mature tree recruitment in a closed-canopy forest may mask the full impact of deer herbivory for decades.
C1 [McGarvey, Jennifer C.; Bourg, Norman A.; Thompson, Jonathan R.; McShea, William J.; Shen, Xiaoli] Smithsonian Inst, Smithsonian Conservat Biol Inst, Front Royal, VA 22630 USA.
[McGarvey, Jennifer C.] Univ Virginia, Dept Environm Sci, Charlottesville, VA 22903 USA.
RP Thompson, JR (reprint author), Smithsonian Inst, Smithsonian Conservat Biol Inst, 1500 Remount Rd, Front Royal, VA 22630 USA.
EM thompsonjr@si.edu
OI Bourg, Norman/0000-0002-7443-1992
FU HSBC Climate Partnership; SIGEO Initiative; Smithsonian Institution
FX Establishment of the SCBI SIGEO plot by William McShea and Norman Bourg
was funded by the HSBC Climate Partnership, the SIGEO Initiative and the
Smithsonian Institution. Numerous technicians, interns, and volunteers
of the Conservation Ecology Center at SCBI were essential in assisting
with plot establishment and data collection, most notably Shawn Behling,
Megan Baker, Sumana Serchan, and Chris Lewis. Support for the original
fence installation was provided by Friends of the National Zoo and
Earthwatch. Additional thanks to Richard Lucas, John Parker, and the
anonymous reviewers for Northeastern Naturalist for their helpful
comments on later drafts of the paper.
NR 56
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U1 8
U2 111
PU HUMBOLDT FIELD RESEARCH INST
PI STEUBEN
PA PO BOX 9, STEUBEN, ME 04680-0009 USA
SN 1092-6194
J9 NORTHEAST NAT
JI Northeast. Nat
PD SEP
PY 2013
VL 20
IS 3
BP 451
EP 468
DI 10.1656/045.020.0301
PG 18
WC Biodiversity Conservation; Ecology
SC Biodiversity & Conservation; Environmental Sciences & Ecology
GA 217QU
UT WOS:000324375700008
ER
PT J
AU Kilpatrick, AM
Peters, RJ
Dupuis, AP
Jones, MJ
Daszak, P
Marra, PP
Kramer, LD
AF Kilpatrick, A. Marm
Peters, Ryan J.
Dupuis, Alan P., II
Jones, Matthew J.
Daszak, Peter
Marra, Peter P.
Kramer, Laura D.
TI Predicted and observed mortality from vector-borne disease in wildlife:
West Nile virus and small songbirds
SO BIOLOGICAL CONSERVATION
LA English
DT Article
DE Disease; Population; Birds; Epidemiology; West Nile virus; Conservation
ID INFECTIOUS-DISEASE; DIPTERA-CULICIDAE; EMERGING DISEASE; BRIDGE VECTOR;
AVIAN HOSTS; BIRDS; CULEX; TRANSMISSION; MOSQUITOS; IMPACT
AB Numerous diseases of wildlife have recently emerged due to trade and travel. However, the impact of disease on wild animal populations has been notoriously difficult to detect and demonstrate, due to problems of attribution and the rapid disappearance of bodies after death. Determining the magnitude of avian mortality from West Nile virus (WNV) is emblematic of these challenges. Although correlational analyses have shown population declines coincident with the arrival of the virus, strong inference of WNV as a cause of mortality or a population decline requires additional evidence. We show how integrating field data on mosquito feeding patterns, avian abundance, and seroprevalence can be used to predict relative mortality from vector-borne pathogens. We illustrate the method with a case study on WNV in three species of small songbirds, tufted titmouse (Baeolophus bicolor), Carolina wrens (Thryothorus ludovicianus), and northern cardinals (Cardinalis cardinalis). We then determined mortality, infectiousness, and behavioral response of wrens and titmouse following infection with WNV in laboratory experiments and compared them to a previous study on WNV mortality in cardinals. In agreement with predictions, we found titmouse had the highest mortality from WNV infection, with 100% of 11 birds perishing within 7 days after infection. Mortality in wrens was significantly lower at 27% (3/11), but still substantial. Viremia profiles indicated that both species were highly infectious for WNV and could play roles in WNV amplification. These findings suggest that WNV may be killing many small-bodied birds, despite the absence of large numbers of dead birds being observed and testing positive for WNV. More broadly, they illustrate the utility of a framework for predicting relative mortality in hosts from vector-borne disease. (C) 2013 Elsevier Ltd. All rights reserved.
C1 [Kilpatrick, A. Marm; Peters, Ryan J.] Univ Calif Santa Cruz, Santa Cruz, CA 95060 USA.
[Peters, Ryan J.; Dupuis, Alan P., II; Jones, Matthew J.; Kramer, Laura D.] New York State Dept Hlth, Wadsworth Ctr, Slingerlands, NY 12159 USA.
[Kilpatrick, A. Marm; Daszak, Peter] Ecohlth Alliance, New York, NY 10001 USA.
[Marra, Peter P.] Smithsonian Conservat Biol Inst, Migratory Bird Ctr, Natl Zool Pk, Washington, DC 20008 USA.
RP Kilpatrick, AM (reprint author), Univ Calif Santa Cruz, Dept Ecol & Evolutionary Biol, EE Biol EMS, UCSC, Santa Cruz, CA 95060 USA.
EM akilpatr@ucsc.edu
FU NSF [EF-0914866]; NIH [1R01AI090159-01]; NIAID [NO1-AI-25490]
FX We thank Will Janousek for assistance capturing and transporting birds,
the Smithsonian's Neighborhood Nestwatch program and residents, the
staff of Rock Creek Park (Meadowside Nature Center), Fort Dupont Park,
the Smithsonian National Museum of Natural History, the National Gallery
of Art and the Hirshhorn museum for permission to use their property. We
are indebted to Montgomery County Parks and the Patuxent National
Wildlife Refuge for permission to use birds from these lands for this
study. Funding was provided by NSF Grant EF-0914866, NIH Grant
1R01AI090159-01, and NIAID Contract #NO1-AI-25490. Birds were collected
under USFWS permit MB177891-1. Experimental infection studies were
approved by the Wadsworth Center, New York State Department of Health,
animal use protocol 09-412.
NR 51
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U1 1
U2 49
PU ELSEVIER SCI LTD
PI OXFORD
PA THE BOULEVARD, LANGFORD LANE, KIDLINGTON, OXFORD OX5 1GB, OXON, ENGLAND
SN 0006-3207
EI 1873-2917
J9 BIOL CONSERV
JI Biol. Conserv.
PD SEP
PY 2013
VL 165
BP 79
EP 85
DI 10.1016/j.biocon.2013.05.015
PG 7
WC Biodiversity Conservation; Ecology; Environmental Sciences
SC Biodiversity & Conservation; Environmental Sciences & Ecology
GA 210YQ
UT WOS:000323871700010
PM 23956457
ER
PT J
AU McCauley, DJ
Power, EA
Bird, DW
McInturff, A
Dunbar, RB
Durham, WH
Micheli, F
Young, HS
AF McCauley, Douglas J.
Power, Eleanor A.
Bird, Douglas W.
McInturff, Alex
Dunbar, Robert B.
Durham, William H.
Micheli, Fiorenza
Young, Hillary S.
TI Conservation at the edges of the world
SO BIOLOGICAL CONSERVATION
LA English
DT Review
DE Remote; Ecosystem service; Tourism; Community; Biodiversity;
Conservation; GIS; Protected area
ID BIODIVERSITY CONSERVATION; CONNECTIVITY; ECOTOURISM; MANAGEMENT;
DEGRADATION; ECOSYSTEMS; SERVICES; ISLANDS; TOURISM; PEOPLE
AB Remote areas harbor some of the world's most undisturbed ecosystems. Major conservation gains can be made by effectively protecting nature in these remote zones. Conducting conservation work in remote settings presents both unique challenges and promising opportunities. We discuss how five commonly used approaches for conservation (buy and protect conservation; conservation motivated by the intrinsic values of nature; ecosystem service based conservation; ecotourism driven conservation; and conservation enabled by community planning) can be optimally applied to protect ecosystems in these special settings. In this discussion we draw examples from two model remote sites: Palmyra and Tabuaeran Atolls. Spatial analyses conducted using population density as a proxy for remoteness indicate that many existing recognized protected areas already include remote regions, but that the vast majority of the overall remote zones on the planet are not yet formally protected. Initiating discussions that directly consider both the roadblocks and opportunities for conservation in remote areas will help increase our odds of successfully protecting biodiversity in these unique and strategically important contexts. (C) 2013 Elsevier Ltd. All rights reserved.
C1 [McCauley, Douglas J.; Micheli, Fiorenza] Stanford Univ, Hopkins Marine Stn, Pacific Grove, CA 93950 USA.
[Power, Eleanor A.; Bird, Douglas W.; Durham, William H.] Stanford Univ, Dept Anthropol, Stanford, CA 94305 USA.
[McInturff, Alex; Dunbar, Robert B.] Stanford Univ, Dept Environm Earth Syst Sci, Stanford, CA 94305 USA.
[Young, Hillary S.] Stanford Univ, Dept Biol, Stanford, CA 94305 USA.
[Young, Hillary S.] Harvard Univ, Ctr Environm, Cambridge, MA 02138 USA.
[Young, Hillary S.] Smithsonian Inst, Div Mammals, Washington, DC 20013 USA.
RP McCauley, DJ (reprint author), Univ Calif Berkeley, Dept Environm Sci Policy & Management, 130 Mulford Hall, Berkeley, CA 94720 USA.
EM mccauley@berkeley.edu
FU Woods Institute for the Environment; National Science Foundation
FX We thank the Woods Institute for the Environment and the National
Science Foundation for funding support. This represents contribution
number PARC-0096 from the Palmyra Atoll Research Consortium.
NR 56
TC 12
Z9 12
U1 2
U2 95
PU ELSEVIER SCI LTD
PI OXFORD
PA THE BOULEVARD, LANGFORD LANE, KIDLINGTON, OXFORD OX5 1GB, OXON, ENGLAND
SN 0006-3207
EI 1873-2917
J9 BIOL CONSERV
JI Biol. Conserv.
PD SEP
PY 2013
VL 165
BP 139
EP 145
DI 10.1016/j.biocon.2013.05.026
PG 7
WC Biodiversity Conservation; Ecology; Environmental Sciences
SC Biodiversity & Conservation; Environmental Sciences & Ecology
GA 210YQ
UT WOS:000323871700016
ER
PT J
AU Baker, DM
Rodriguez-Martinez, RE
Fogel, ML
AF Baker, D. M.
Rodriguez-Martinez, R. E.
Fogel, M. L.
TI Tourism's nitrogen footprint on a Mesoamerican coral reef
SO CORAL REEFS
LA English
DT Article
DE Mesoamerican barrier reef; Coastal aquifers; Stable isotope; Nitrogen;
Eutrophication; Coral; Sewage; Tourism; Gorgonian; Monitoring; Gorgonia
ventalina
ID GROUNDWATER DISCHARGE; SPATIAL PATTERNS; SEWAGE POLLUTION;
WATER-QUALITY; COASTAL ZONE; DELTA-N-15; MEXICO; ECOSYSTEM; YUCATAN;
FLORIDA
AB Globally, the eutrophication of coastal marine environments is a worsening problem that is accelerating the loss of biodiversity and ecosystem services. Coral reefs are among the most sensitive to this change, as chronic inputs of agricultural and wastewater effluents and atmospheric deposition disrupt their naturally oligotrophic state. Often, anthropogenic alteration of the coastal nitrogen pool can proceed undetected as rapid mixing with ocean waters can mask chronic and ephemeral nitrogen inputs. Monitoring nitrogen stable isotope values (delta N-15) of benthic organisms provides a useful solution to this problem. Through a 7-yr monitoring effort in Quintana Roo, Mexico, we show that delta N-15 values of the common sea fan Gorgonia ventalina were more variable near a developed (Akumal) site than at an undeveloped (Mahahual) site. Beginning in 2007, the global recession decreased tourist visitations to Akumal, which corresponded with a pronounced 1.6 aEuro degrees decline in sea fan delta N-15 through 2009, at which time delta N-15 values were similar to those from Mahahual. With the recovery of tourism, delta N-15 values increased to previous levels. Overall, 84 % of the observed variation in delta N-15 was explained by tourist visitations in the preceding year alone, indicating that variable nitrogen source contributions are correlated with sea fan delta N-15 values. We also found that annual precipitation accounted for some variation in delta N-15, likely due to its role in groundwater flushing into the sea. Together, these factors accounted for 96 % of the variation in delta N-15. Using a mixing model, we estimate that sewage can account for up to 42 % of nitrogen in sea fan biomass. These findings illustrate the high connectivity between land-based activities and coral reef productivity and the measurable impact of the tourism industry on the ecosystem it relies on.
C1 [Baker, D. M.] Natl Museum Nat Hist, Marine Sci Network, Smithsonian Inst, Washington, DC 20004 USA.
[Baker, D. M.; Fogel, M. L.] Carnegie Inst Sci, Geophys Lab, Washington, DC 20015 USA.
[Rodriguez-Martinez, R. E.] Univ Nacl Autonoma Mexico, Unidad Acad Puerto Morelos, Inst Ciencias Mar & Limnol, Cancun 77500, QR, Mexico.
RP Baker, DM (reprint author), Univ Hong Kong, Sch Biol Sci, Pokfulam Rd, Hong Kong, Hong Kong, Peoples R China.
EM dbaker@ciw.edu
FU Coral Disease Working Group of the Global Environment Facility Coral
Targeted Research program; W.M. Keck Foundation; U.S. Environmental
Protection Agency Science to Achieve Results fellowship; Smithsonian
Marine Science Network Fellowship
FX Special thanks to CD Harvell, E Jordan-Dahlgren, MA Maldonado, AG
Jordan-Garza, L. Vazquez, P Sanchez-Navarro, and the Centro Ecologico
Akumal for logistical support. J Garcia Barbabosa and the staff of
Bucaneros del Caribe, and the staff of La Posada de los 40 Canones
assisted with sample collection in Mahahual. We thank CW Kwan for
statistical advising. This work was supported by the Coral Disease
Working Group of the Global Environment Facility Coral Targeted Research
program, the W.M. Keck Foundation to MLF, a U.S. Environmental
Protection Agency Science to Achieve Results fellowship to DMB, and a
Smithsonian Marine Science Network Fellowship to DMB. The authors claim
no conflict of interest with this work.
NR 44
TC 11
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U1 8
U2 138
PU SPRINGER
PI NEW YORK
PA 233 SPRING ST, NEW YORK, NY 10013 USA
SN 0722-4028
J9 CORAL REEFS
JI Coral Reefs
PD SEP
PY 2013
VL 32
IS 3
BP 691
EP 699
DI 10.1007/s00338-013-1040-2
PG 9
WC Marine & Freshwater Biology
SC Marine & Freshwater Biology
GA 197TQ
UT WOS:000322874500009
ER
PT J
AU Fowler, AE
Muirhead, JR
Taylor, RB
AF Fowler, Amy E.
Muirhead, Jim R.
Taylor, Richard B.
TI EARLY STAGES OF A NEW ZEALAND INVASION BY CHARYBDIS JAPONICA (A.
MILNE-EDWARDS, 1861) (BRACHYURA: PORTUNIDAE) FROM ASIA: BEHAVIORAL
INTERACTIONS WITH A NATIVE CRAB SPECIES
SO JOURNAL OF CRUSTACEAN BIOLOGY
LA English
DT Article
DE competition; introduced; invasive; marine; Ovalipes catharus; prey
ID CARCINUS-MAENAS; SHORE CRAB; GREEN CRAB; SUCCESS; BIODIVERSITY;
HEMIGRAPSUS; AGGRESSION; RESISTANCE; PREDATION; HABITATS
AB The Asian paddle crab, Charybdis japonica (A. Milne-Edwards, 1861), is a relatively recent invader (approx. 10 years) to northeastern New Zealand, and its large size and aggressive nature makes it a potentially formidable competitor with native species. The only endemic, similarly sized, New Zealand paddle crab, Ovalipes catharus (White and Doubleday, 1843), overlaps frequently with C. japonica in both habitat and diet. To understand their probable interactions in the field, we performed a series of experimental behavioral trials in a closed laboratory system to determine whether the crabs interact antagonistically over a shared prey resource (Perna canaliculus (Gmelin, 1791) - green-lipped mussel). In interspecific trials, C. japonica frequently displaced both sexes of O. catharus from the prey, while O. catharus usually failed to acquire prey from feeding C. japonica. In addition, male C. japonica dominated both male and female O. catharus in one-on-one competition for food, regardless of which crab possessed the food initially. Overall, male C. japonica behaved aggressively towards O. catharus and conspecifics of equal size when competing for a prey item; O. catharus showed low levels of aggression throughout all trials and increased time spent evading C. japonica as compared to C. japonica's high levels of aggression. Our research highlights the importance of understanding how aggressive behavior may influence establishment success of invading species.
C1 [Fowler, Amy E.] Univ Auckland, Leigh Marine Lab, Warkworth 0941, New Zealand.
[Muirhead, Jim R.; Taylor, Richard B.] Smithsonian Environm Res Ctr, Edgewater, MD 21037 USA.
RP Fowler, AE (reprint author), Smithsonian Environm Res Ctr, 647 Contees Wharf Rd, Edgewater, MD 21037 USA.
EM fowlera@si.edu
FU J. William Fulbright New Zealand Graduate scholarship; University of
Auckland J. William Fulbright scholarship
FX This research was supported by a J. William Fulbright New Zealand
Graduate scholarship and University of Auckland J. William Fulbright
scholarship to A.E.F. and was completed under University of Auckland
Animal Ethics permit R737. Field support was provided by A. Fukunaga and
C. Bedford. N. Herbert, D. Cook and M. Birch provided experimental
equipment and assisted in experimental design. M. Minton was invaluable
for his statistical advice. We sincerely thank J. Canning-Clode, A.M.H.
Blakeslee, C.L. McLay and two anonymous reviewers for their comments,
which significantly improved this manuscript.
NR 55
TC 2
Z9 2
U1 5
U2 37
PU CRUSTACEAN SOC
PI SAN ANTONIO
PA 840 EAST MULBERRY, SAN ANTONIO, TX 78212 USA
SN 0278-0372
J9 J CRUSTACEAN BIOL
JI J. Crustac. Biol.
PD SEP
PY 2013
VL 33
IS 5
BP 672
EP 680
DI 10.1163/1937240X-00002177
PG 9
WC Marine & Freshwater Biology
SC Marine & Freshwater Biology
GA 210SU
UT WOS:000323855600009
ER
PT J
AU Evans, JD
Brown, SJ
Hackett, KJ
Robinson, G
Richards, S
Lawson, D
Elsik, C
Coddington, J
Edwards, O
Emrich, S
Gabaldon, T
Goldsmith, M
Hanes, G
Misof, B
Munoz-Torres, M
Niehuis, O
Papanicolaou, A
Pfrender, M
Poelchau, M
Purcell-Miramontes, M
Robertson, HM
Ryder, O
Tagu, D
Torres, T
Zdobnov, E
Zhang, GJ
Zhou, X
AF Evans, Jay D.
Brown, Susan J.
Hackett, Kevin J.
Robinson, Gene
Richards, Stephen
Lawson, Daniel
Elsik, Christine
Coddington, Jonathan
Edwards, Owain
Emrich, Scott
Gabaldon, Toni
Goldsmith, Marian
Hanes, Glenn
Misof, Bernard
Munoz-Torres, Monica
Niehuis, Oliver
Papanicolaou, Alexie
Pfrender, Michael
Poelchau, Monica
Purcell-Miramontes, Mary
Robertson, Hugh M.
Ryder, Oliver
Tagu, Denis
Torres, Tatiana
Zdobnov, Evgeny
Zhang, Guojie
Zhou, Xin
CA i5K Consortium
TI The i5K Initiative:Advancing Arthropod Genomics for Knowledge, Human
Health,Agriculture, and the Environment i5K CONSORTIUM
SO JOURNAL OF HEREDITY
LA English
DT Article
DE comparative genomics; disease vector; agriculture; insect evolution;
genome sequencing
ID SEQUENCE
AB Insects and their arthropod relatives including mites, spiders, and crustaceans play major roles in the world's terrestrial, aquatic, and marine ecosystems. Arthropods compete with humans for food and transmit devastating diseases. They also comprise the most diverse and successful branch of metazoan evolution, with millions of extant species. Here, we describe an international effort to guide arthropod genomic efforts, from species prioritization to methodology and informatics. The 5000 arthropod genomes initiative (i5K) community met formally in 2012 to discuss a roadmap for sequencing and analyzing 5000 high-priority arthropods and is continuing this effort via pilot projects, the development of standard operating procedures, and training of students and career scientists, With university, governmental, and industry support, the i5K Consortium aspires to deliver sequences and analytical tools for each of the arthropod branches and each of the species having beneficial and negative effects on humankind.
C1 [Evans, Jay D.; Hackett, Kevin J.; Hanes, Glenn] USDA ARS, Beltsville, MD USA.
[Brown, Susan J.] Kansas State Univ, Manhattan, KS 66506 USA.
[Robinson, Gene; Robertson, Hugh M.] Univ Illinois, Urbana, IL 61801 USA.
[Richards, Stephen] Baylor Coll Med, Human Genome Sequencing Ctr, Houston, TX 77030 USA.
[Lawson, Daniel] European Bioinformat Inst Hinxton, Hinxton, England.
[Elsik, Christine] Univ Missouri, Columbia, MO USA.
[Coddington, Jonathan] Smithsonian Inst NMNH, Washington, DC USA.
[Edwards, Owain] CSIRO, Ctr Environm & Life Sci, Floreat, Australia.
[Emrich, Scott; Pfrender, Michael] Univ Notre Dame, South Bend, IN USA.
[Gabaldon, Toni] Ctr Genom Regulat, Barcelona, Spain.
[Goldsmith, Marian] Univ Rhode Isl, Providence, RI 02908 USA.
[Misof, Bernard; Niehuis, Oliver] Ctr Mol Biodivers Res, ZFMK, Bonn, Germany.
[Munoz-Torres, Monica] Univ Calif Berkeley, Lawrence Berkeley Natl Lab, Genom Div, Berkeley, CA 94720 USA.
[Papanicolaou, Alexie] CSIRO Ecosyst Sci, Black Mt, Australia.
[Poelchau, Monica] Georgetown Univ, Dept Biol, Washington, DC 20057 USA.
[Purcell-Miramontes, Mary] Natl Inst Food & Agr, USDA, Washington, DC USA.
[Ryder, Oliver] San Diego Zoo, Inst Conservat Res, San Diego, CA USA.
[Tagu, Denis] INRA UMR 1349 IGEPP, Rennes, France.
[Torres, Tatiana] Univ Sao Paulo, Sao Paulo, Brazil.
[Zdobnov, Evgeny] Univ Geneva, Sch Med, CH-1211 Geneva, Switzerland.
[Zhang, Guojie; Zhou, Xin] BGI Shenzhen, Shenzhen, Peoples R China.
RP Evans, JD (reprint author), ARS, USDA, Bee Res Lab, Beltsville, MD 20705 USA.
EM jay.evans@ars.usda.gov; kevin.hackett@ars.usda.gov;
generobi@illinois.edu; stephenr@hgsc.bcm.edu; lawson@ebi.ac.uk;
elsikc@missouri.edu; coddington@si.edu; owain.edwards@csixo.au;
semrich@nd.edu; toni.gabaldon@crg.es; mki101@uri.edu;
Glenn.Hanes@ars.usda.gov; b.misof.zfmk@uni-bonn.de; mcmunozt@lbl.gov;
o.niehuis.zfmk@uni-bonn.de; alexie.papanicolaou@csito.au;
pfrender.1@nd.edu; mpoel-chau@gmail.com; mpurcell@nifa.usda.gov;
hughrobe@life.uiuc.edu; oryder@sandiegozoo.org;
denis.tagu@rennes.inra.fr; tttorres@ib.usp.br; evgeny.zdobnov@unige.ch;
zhanggj@genomics.org.cn; xinzhou@genomics.org.cn
RI Torres, Tatiana/B-6431-2012; UMR IGEPP, INRA/A-4054-2011; Papanicolaou,
Alexie/A-1618-2011; Gabaldon, Toni/A-7336-2008; Zhou, Xin/D-4025-2009;
Zdobnov, Evgeny/K-1133-2012; Elsik, Christine/C-4120-2017; Evans,
Jay/C-8408-2012; Zhang, Guojie/B-6188-2014; Edwards, Owain/B-9707-2008
OI Torres, Tatiana/0000-0002-4286-3504; Papanicolaou,
Alexie/0000-0002-3635-6848; Gabaldon, Toni/0000-0003-0019-1735; Zhou,
Xin/0000-0002-1407-7952; Elsik, Christine/0000-0002-4248-7713; Evans,
Jay/0000-0002-0036-4651; Zhang, Guojie/0000-0001-6860-1521;
FU American Genetic Association; Arthropod Genomics Center (Kansas State
University); US Department of Agriculture (National Institute for Food
and Agriculture and Agricultural Research Service)
FX American Genetic Association; the Arthropod Genomics Center (Kansas
State University); and the US Department of Agriculture (National
Institute for Food and Agriculture and Agricultural Research Service).
NR 4
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PU OXFORD UNIV PRESS INC
PI CARY
PA JOURNALS DEPT, 2001 EVANS RD, CARY, NC 27513 USA
SN 0022-1503
EI 1465-7333
J9 J HERED
JI J. Hered.
PD SEP-OCT
PY 2013
VL 104
IS 5
BP 595
EP 600
DI 10.1093/jhered/est050
PG 6
WC Evolutionary Biology; Genetics & Heredity
SC Evolutionary Biology; Genetics & Heredity
GA 203LJ
UT WOS:000323294400001
ER
PT J
AU Hong, T
AF Hong, Terry
TI A True Novel
SO LIBRARY JOURNAL
LA English
DT Book Review
C1 [Hong, Terry] Smithsonian BookDragon, Washington, DC USA.
RP Hong, T (reprint author), Smithsonian BookDragon, Washington, DC USA.
NR 1
TC 0
Z9 0
U1 0
U2 0
PU REED BUSINESS INFORMATION
PI NEW YORK
PA 360 PARK AVENUE SOUTH, NEW YORK, NY 10010 USA
SN 0363-0277
J9 LIBR J
JI Libr. J.
PD SEP 1
PY 2013
VL 138
IS 14
BP 101
EP 101
PG 1
WC Information Science & Library Science
SC Information Science & Library Science
GA 211NZ
UT WOS:000323916400067
ER
PT J
AU Hong, T
AF Hong, Terry
TI Furious Cool: Richard Pryor and the World That Made Him
SO LIBRARY JOURNAL
LA English
DT Book Review
C1 [Hong, Terry] Smithsonian Inst, Washington, DC 20560 USA.
RP Hong, T (reprint author), Smithsonian Inst, Washington, DC 20560 USA.
NR 1
TC 0
Z9 0
U1 0
U2 0
PU REED BUSINESS INFORMATION
PI NEW YORK
PA 360 PARK AVENUE SOUTH, NEW YORK, NY 10010 USA
SN 0363-0277
J9 LIBR J
JI Libr. J.
PD SEP 1
PY 2013
VL 138
IS 14
BP 112
EP 112
PG 1
WC Information Science & Library Science
SC Information Science & Library Science
GA 211NZ
UT WOS:000323916400114
ER
PT J
AU Kipping, DM
Spiegel, DS
Sasselov, DD
AF Kipping, David M.
Spiegel, David S.
Sasselov, Dimitar D.
TI A simple, quantitative method to infer the minimum atmospheric height of
small exoplanets
SO MONTHLY NOTICES OF THE ROYAL ASTRONOMICAL SOCIETY
LA English
DT Article
DE methods: analytical; methods: statistical; techniques: photometric;
techniques: radial velocities; planetary systems
ID SUPER-EARTH GJ1214B; METAL-RICH ATMOSPHERE; GJ 1214B; TRANSMISSION
SPECTRUM; EXTRASOLAR PLANET; SPECTROSCOPY; TRANSITS; SPITZER; STAR; GAS
AB Amongst the many hundreds of transiting planet candidates discovered by the Kepler mission, one finds a large number of candidates with sizes between that of the Earth and Neptune. The composition of these worlds is not immediately obvious with no Solar system analogue to draw upon and there exists some ambiguity as to whether a given candidate is a rocky super-Earth or a gas-enveloped mini-Neptune. The potential scientific value and observability of the atmospheres of these two classes of worlds varies significantly, and given the sheer number of candidates in this size range, there is evidently a need for a quick, simple metric to rank whether the planets have an extended atmosphere or not. In this work, we propose a way to calculate the 'minimum atmospheric height' (R-MAH) using only a planet's radius and mass as inputs. We assume and exploit the boundary condition that the bulk composition of a solid/liquid super-Earth cannot be composed of a material lighter than that of water. Mass-radius loci above a pure-water composition planet correspond to R-MAH > 0. The statistical confidence of a planet maintaining an extended atmosphere can be therefore easily calculated to provide a simple ranking of target planets for follow-up observations. We also discuss how this metric can be useful in the interpretation of the spectra of observed planetary atmospheres.
C1 [Kipping, David M.; Sasselov, Dimitar D.] Harvard Smithsonian Ctr Astrophys, Cambridge, MA 02138 USA.
[Spiegel, David S.] Inst Adv Study, Astrophys Dept, Princeton, NJ 08540 USA.
RP Kipping, DM (reprint author), Harvard Smithsonian Ctr Astrophys, 60 Garden St, Cambridge, MA 02138 USA.
EM dkipping@cfa.harvard.edu
FU NASA; NSF [AST-0807444]; Keck Fellowship
FX DMK is supported by the NASA Carl Sagan Fellowships. DSS gratefully
acknowledges support from NSF grant AST-0807444 and the Keck Fellowship,
and the Friends of the Institute. We are very grateful to Guillem
Anglada-Escude and collaborators for kindly sharing their posteriors
with us for GJ 1214b and to Josh Carter for useful conversations on
Kepler-36. Special thanks to the anonymous reviewers for their helpful
comments.
NR 32
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U1 0
U2 4
PU OXFORD UNIV PRESS
PI OXFORD
PA GREAT CLARENDON ST, OXFORD OX2 6DP, ENGLAND
SN 0035-8711
J9 MON NOT R ASTRON SOC
JI Mon. Not. Roy. Astron. Soc.
PD SEP
PY 2013
VL 434
IS 3
BP 1883
EP 1888
DI 10.1093/mnras/stt1050
PG 6
WC Astronomy & Astrophysics
SC Astronomy & Astrophysics
GA 207YE
UT WOS:000323639900005
ER
PT J
AU Abramowski, A
Acero, F
Aharonian, F
Akhperjanian, AG
Anguner, E
Anton, G
Balenderan, S
Balzer, A
Barnacka, A
Becherini, Y
Tjus, JB
Bernlohr, K
Birsin, E
Bissaldi, E
Biteau, J
Boisson, C
Bolmont, J
Bordas, P
Brucker, J
Brun, F
Brun, P
Bulik, T
Carrigan, S
Casanova, S
Cerruti, M
Chadwick, PM
Chalme-Calvet, R
Chaves, RCG
Cheesebrough, A
Chretien, M
Colafrancesco, S
Cologna, G
Conrad, J
Couturier, C
Dalton, M
Daniel, MK
Davids, ID
Degrange, B
Deil, C
deWilt, P
Dickinson, HJ
Djannati-Atai, A
Domainko, W
Drury, LO
Dubus, G
Dutson, K
Dyks, J
Dyrda, M
Edwards, T
Egberts, K
Eger, P
Espigat, P
Farnier, C
Fegan, S
Feinstein, F
Fernandes, MV
Fernandez, D
Fiasson, A
Fontaine, G
Forster, A
Fussling, M
Gajdus, M
Gallant, YA
Garrigoux, T
Gast, H
Giebels, B
Glicenstein, JF
Goring, D
Grondin, MH
Grudzinska, M
Haffner, S
Hague, JD
Hahn, J
Harris, J
Heinzelmann, G
Henri, G
Hermann, G
Hervet, O
Hillert, A
Hinton, JA
Hofmann, W
Hofverberg, P
Holler, M
Horns, D
Jacholkowska, A
Jahn, C
Jamrozy, M
Janiak, M
Jankowsky, F
Jung, I
Kastendieck, MA
Katarzynski, K
Katz, U
Kaufmann, S
Khelifi, B
Kieffer, M
Klepser, S
Klochkov, D
Kluzniak, W
Kneiske, T
Kolitzus, D
Komin, N
Kosack, K
Krakau, S
Krayzel, F
Kruger, PP
Laffon, H
Lamanna, G
Lefaucheur, J
Lemoine-Goumard, M
Lenain, JP
Lennarz, D
Lohse, T
Lopatin, A
Lu, CC
Marandon, V
Marcowith, A
Maurin, G
Maxted, N
Mayer, M
McComb, TJL
Medina, MC
Mehault, J
Menzler, U
Meyer, M
Moderski, R
Mohamed, M
Moulin, E
Murach, T
Naumann, CL
de Naurois, M
Nedbal, D
Niemiec, J
Nolan, SJ
Oakes, L
Ohm, S
Wilhelmi, ED
Opitz, B
Ostrowski, M
Oya, I
Panter, M
Parsons, RD
Arribas, MP
Pekeur, NW
Pelletier, G
Perez, J
Petrucci, PO
Peyaud, B
Pita, S
Poon, H
Puhlhofer, G
Punch, M
Quirrenbach, A
Raab, S
Raue, M
Reimer, A
Reimer, O
Renaud, M
de los Reyes, R
Rieger, F
Rob, L
Rosier-Lees, S
Rowell, G
Rudak, B
Rulten, CB
Sahakian, V
Sanchez, DA
Santangelo, A
Schlickeiser, R
Schussler, F
Schulz, A
Schwanke, U
Schwarzburg, S
Schwemmer, S
Sol, H
Spengler, G
Spiess, F
Stawarz, L
Steenkamp, R
Stegmann, C
Stinzing, F
Stycz, K
Sushch, I
Szostek, A
Tavernet, JP
Terrier, R
Tluczykont, M
Trichard, C
Valerius, K
van Eldik, C
Vasileiadis, G
Venter, C
Viana, A
Vincent, P
Volk, HJ
Volpe, F
Vorster, M
Wagner, SJ
Wagner, P
Ward, M
Weidinger, M
White, R
Wierzcholska, A
Willmann, P
Wornlein, A
Wouters, D
Zacharias, M
Zajczyk, A
Zdziarski, AA
Zech, A
Zechlin, HS
Perkins, JS
Ojha, R
Stevens, J
Edwards, PG
Kadler, M
AF Abramowski, A.
Acero, F.
Aharonian, F.
Akhperjanian, A. G.
Anguener, E.
Anton, G.
Balenderan, S.
Balzer, A.
Barnacka, A.
Becherini, Y.
Tjus, J. Becker
Bernloehr, K.
Birsin, E.
Bissaldi, E.
Biteau, J.
Boisson, C.
Bolmont, J.
Bordas, P.
Brucker, J.
Brun, F.
Brun, P.
Bulik, T.
Carrigan, S.
Casanova, S.
Cerruti, M.
Chadwick, P. M.
Chalme-Calvet, R.
Chaves, R. C. G.
Cheesebrough, A.
Chretien, M.
Colafrancesco, S.
Cologna, G.
Conrad, J.
Couturier, C.
Dalton, M.
Daniel, M. K.
Davids, I. D.
Degrange, B.
Deil, C.
deWilt, P.
Dickinson, H. J.
Djannati-Atai, A.
Domainko, W.
Drury, L. O'C.
Dubus, G.
Dutson, K.
Dyks, J.
Dyrda, M.
Edwards, T.
Egberts, K.
Eger, P.
Espigat, P.
Farnier, C.
Fegan, S.
Feinstein, F.
Fernandes, M. V.
Fernandez, D.
Fiasson, A.
Fontaine, G.
Foerster, A.
Fuessling, M.
Gajdus, M.
Gallant, Y. A.
Garrigoux, T.
Gast, H.
Giebels, B.
Glicenstein, J. F.
Goering, D.
Grondin, M-H.
Grudzinska, M.
Haeffner, S.
Hague, J. D.
Hahn, J.
Harris, J.
Heinzelmann, G.
Henri, G.
Hermann, G.
Hervet, O.
Hillert, A.
Hinton, J. A.
Hofmann, W.
Hofverberg, P.
Holler, M.
Horns, D.
Jacholkowska, A.
Jahn, C.
Jamrozy, M.
Janiak, M.
Jankowsky, F.
Jung, I.
Kastendieck, M. A.
Katarzynski, K.
Katz, U.
Kaufmann, S.
Khelifi, B.
Kieffer, M.
Klepser, S.
Klochkov, D.
Kluzniak, W.
Kneiske, T.
Kolitzus, D.
Komin, Nu.
Kosack, K.
Krakau, S.
Krayzel, F.
Krueger, P. P.
Laffon, H.
Lamanna, G.
Lefaucheur, J.
Lemoine-Goumard, M.
Lenain, J-P.
Lennarz, D.
Lohse, T.
Lopatin, A.
Lu, C-C.
Marandon, V.
Marcowith, A.
Maurin, G.
Maxted, N.
Mayer, M.
McComb, T. J. L.
Medina, M. C.
Mehault, J.
Menzler, U.
Meyer, M.
Moderski, R.
Mohamed, M.
Moulin, E.
Murach, T.
Naumann, C. L.
de Naurois, M.
Nedbal, D.
Niemiec, J.
Nolan, S. J.
Oakes, L.
Ohm, S.
Wilhelmi, E. de Ona
Opitz, B.
Ostrowski, M.
Oya, I.
Panter, M.
Parsons, R. D.
Arribas, M. Paz
Pekeur, N. W.
Pelletier, G.
Perez, J.
Petrucci, P-O.
Peyaud, B.
Pita, S.
Poon, H.
Puehlhofer, G.
Punch, M.
Quirrenbach, A.
Raab, S.
Raue, M.
Reimer, A.
Reimer, O.
Renaud, M.
de los Reyes, R.
Rieger, F.
Rob, L.
Rosier-Lees, S.
Rowell, G.
Rudak, B.
Rulten, C. B.
Sahakian, V.
Sanchez, D. A.
Santangelo, A.
Schlickeiser, R.
Schuessler, F.
Schulz, A.
Schwanke, U.
Schwarzburg, S.
Schwemmer, S.
Sol, H.
Spengler, G.
Spiess, F.
Stawarz, L.
Steenkamp, R.
Stegmann, C.
Stinzing, F.
Stycz, K.
Sushch, I.
Szostek, A.
Tavernet, J-P.
Terrier, R.
Tluczykont, M.
Trichard, C.
Valerius, K.
van Eldik, C.
Vasileiadis, G.
Venter, C.
Viana, A.
Vincent, P.
Voelk, H. J.
Volpe, F.
Vorster, M.
Wagner, S. J.
Wagner, P.
Ward, M.
Weidinger, M.
White, R.
Wierzcholska, A.
Willmann, P.
Woernlein, A.
Wouters, D.
Zacharias, M.
Zajczyk, A.
Zdziarski, A. A.
Zech, A.
Zechlin, H-S.
Perkins, J. S.
Ojha, R.
Stevens, J.
Edwards, P. G.
Kadler, M.
CA HESS Collaboration
TI HESS and Fermi-LAT discovery of gamma-rays from the blazar 1ES 1312-423
SO MONTHLY NOTICES OF THE ROYAL ASTRONOMICAL SOCIETY
LA English
DT Article
DE radiation mechanisms: non-thermal; galaxies: active; BL Lacertae
objects: individual: 1ES 1312-423; galaxies: jets; gamma-rays: galaxies
ID BL-LACERTAE OBJECTS; LARGE-AREA TELESCOPE; ATMOSPHERIC CHERENKOV
TELESCOPES; SPECTRAL ENERGY-DISTRIBUTIONS; MEDIUM-SENSITIVITY SURVEY;
SOURCE CATALOG; BACKGROUND-RADIATION; COMPLETE SAMPLE; TEV BLAZARS;
RADIO
AB A deep observation campaign carried out by the High Energy Stereoscopic System (HESS) on Centaurus A enabled the discovery of gamma-rays from the blazar 1ES 1312-423, 2 degrees away from the radio galaxy. With a differential flux at 1 TeV of phi(1 TeV) = (1.9 +/- 0.6(stat) +/- 0.4(sys)) x 10(-13) cm(-2) s(-1) TeV-1 corresponding to 0.5 per cent of the Crab nebula differential flux and a spectral index Gamma = 2.9 +/- 0.5(stat) +/- 0.2(sys), 1ES 1312-423 is one of the faintest sources ever detected in the very high energy (E > 100 GeV) extragalactic sky. A careful analysis using three and a half years of Fermi Large Area Telescope (Fermi-LAT) data allows the discovery at high energies (E > 100 MeV) of a hard spectrum (Gamma = 1.4 +/- 0.4(stat) +/- 0.2(sys)) source coincident with 1ES 1312-423. Radio, optical, UV and X-ray observations complete the spectral energy distribution of this blazar, now covering 16 decades in energy. The emission is successfully fitted with a synchrotron self-Compton model for the non-thermal component, combined with a blackbody spectrum for the optical emission from the host galaxy.
C1 [Abramowski, A.; Fernandes, M. V.; Heinzelmann, G.; Horns, D.; Kastendieck, M. A.; Kneiske, T.; Meyer, M.; Opitz, B.; Raue, M.; Spiess, F.; Tluczykont, M.; Zechlin, H-S.] Univ Hamburg, Inst Expt Phys, D-22761 Hamburg, Germany.
[Acero, F.; Feinstein, F.; Fernandez, D.; Gallant, Y. A.; Marcowith, A.; Renaud, M.; Vasileiadis, G.; Zajczyk, A.] Univ Montpellier 2, Lab Univers & Particules Montpellier, CNRS, IN2P3,CC 72, F-34095 Montpellier 5, France.
[Aharonian, F.; Bernloehr, K.; Brun, F.; Carrigan, S.; Casanova, S.; Chaves, R. C. G.; Deil, C.; Domainko, W.; Edwards, T.; Eger, P.; Foerster, A.; Gast, H.; Grondin, M-H.; Hague, J. D.; Hahn, J.; Hermann, G.; Hillert, A.; Hofmann, W.; Hofverberg, P.; Krueger, P. P.; Lennarz, D.; Lu, C-C.; Marandon, V.; Wilhelmi, E. de Ona; Panter, M.; Parsons, R. D.; Poon, H.; de los Reyes, R.; Rieger, F.; Sanchez, D. A.; Viana, A.; Voelk, H. J.; Volpe, F.] Max Planck Inst Kernphys, D-69029 Heidelberg, Germany.
[Aharonian, F.; Drury, L. O'C.] Dublin Inst Adv Studies, Dublin 2, Ireland.
[Aharonian, F.; Akhperjanian, A. G.; Sahakian, V.] Natl Acad Sci Republ Armenia, Yerevan 375019, Armenia.
[Akhperjanian, A. G.; Sahakian, V.] Yerevan Phys Inst, Yerevan 375036, Armenia.
[Anguener, E.; Bernloehr, K.; Birsin, E.; Gajdus, M.; Lohse, T.; Murach, T.; Oakes, L.; Oya, I.; Arribas, M. Paz; Schwanke, U.; Spengler, G.; Sushch, I.; Wagner, P.] Humboldt Univ, Inst Phys, D-12489 Berlin, Germany.
[Anton, G.; Brucker, J.; Goering, D.; Haeffner, S.; Jahn, C.; Jung, I.; Katz, U.; Lopatin, A.; Raab, S.; Stinzing, F.; Valerius, K.; van Eldik, C.; Willmann, P.; Woernlein, A.] Univ Erlangen Nurnberg, Inst Phys, D-91058 Erlangen, Germany.
[Balenderan, S.; Chadwick, P. M.; Cheesebrough, A.; Daniel, M. K.; Harris, J.; McComb, T. J. L.; Nolan, S. J.; Ward, M.] Univ Durham, Dept Phys, Durham DH1 3LE, England.
[Balzer, A.; Klepser, S.; Schulz, A.; Stegmann, C.; Stycz, K.] DESY, D-15735 Zeuthen, Germany.
[Balzer, A.; Fuessling, M.; Holler, M.; Mayer, M.; Stegmann, C.] Univ Potsdam, Inst Phys & Astron, D-14476 Golm, Germany.
[Barnacka, A.; Dyks, J.; Janiak, M.; Kluzniak, W.; Moderski, R.; Rudak, B.; Zajczyk, A.; Zdziarski, A. A.] Nicolaus Copernicus Astron Ctr, PL-00716 Warsaw, Poland.
[Becherini, Y.; Cologna, G.; Grondin, M-H.; Jankowsky, F.; Kaufmann, S.; Mohamed, M.; Quirrenbach, A.; Schwemmer, S.; Wagner, S. J.] Heidelberg Univ, Landessternwarte, D-69117 Heidelberg, Germany.
[Becherini, Y.; Djannati-Atai, A.; Espigat, P.; Lefaucheur, J.; Pita, S.; Punch, M.; Terrier, R.] Univ Paris Diderot, APC, CNRS, IN2P3,CEA,Irfu,Observat Paris,Sorbonne Paris Cite, F-75205 Paris 13, France.
[Becherini, Y.; Biteau, J.; Degrange, B.; Fegan, S.; Fontaine, G.; Giebels, B.; Khelifi, B.; Laffon, H.; de Naurois, M.] Ecole Polytech, CNRS, IN2P3, Lab Leprince Ringuet, F-91128 Palaiseau, France.
[Tjus, J. Becker; Krakau, S.; Menzler, U.; Schlickeiser, R.; Weidinger, M.; Zacharias, M.] Ruhr Univ Bochum, Inst Theoret Phys, Lehrstuhl Weltraum & Astrophys 4, D-44780 Bochum, Germany.
[Bissaldi, E.; Egberts, K.; Kolitzus, D.; Perez, J.; Reimer, A.; Reimer, O.] Leopold Franzens Univ Innsbruck, Inst Astro & Teilchenphys, A-6020 Innsbruck, Austria.
[Boisson, C.; Cerruti, M.; Hervet, O.; Rulten, C. B.; Sol, H.; Zech, A.] Univ Paris Diderot, CNRS, Observ Paris, LUTH, F-92190 Meudon, France.
[Bolmont, J.; Chalme-Calvet, R.; Chretien, M.; Couturier, C.; Garrigoux, T.; Jacholkowska, A.; Kieffer, M.; Lenain, J-P.; Naumann, C. L.; Tavernet, J-P.; Vincent, P.] Univ Paris 07, Univ Paris 06, LPNHE, CNRS,IN2P3, F-75252 Paris 5, France.
[Bordas, P.; Klochkov, D.; Puehlhofer, G.; Santangelo, A.; Schwarzburg, S.] Univ Tubingen, Inst Astron & Astrophys, D-72076 Tubingen, Germany.
[Brun, P.; Chaves, R. C. G.; Glicenstein, J. F.; Kosack, K.; Medina, M. C.; Moulin, E.; Peyaud, B.; Schuessler, F.; Wouters, D.] CEA Saclay, DSM, Irfu, F-91191 Gif Sur Yvette, France.
[Bulik, T.; Grudzinska, M.] Univ Warsaw, Astron Observ, PL-00478 Warsaw, Poland.
[Casanova, S.; Krueger, P. P.; Pekeur, N. W.; Sushch, I.; Venter, C.; Vorster, M.] North West Univ, Unit Space Phys, ZA-2520 Potchefstroom, South Africa.
[Cerruti, M.] Harvard Smithsonian Ctr Astrophys, Cambridge, MA 02138 USA.
[Colafrancesco, S.] Univ Witwatersrand, Sch Phys, ZA-2050 Johannesburg, South Africa.
[Conrad, J.; Dickinson, H. J.; Farnier, C.] Stockholm Univ, Albanova Univ Ctr, Dept Phys, Oskar Klein Ctr, SE-10691 Stockholm, Sweden.
[Dalton, M.; Laffon, H.; Lemoine-Goumard, M.; Mehault, J.] Univ Bordeaux 1, Ctr Etud Nuc Bordeaux Gradignan, CNRS, IN2P3, F-33175 Gradignan, France.
[Davids, I. D.; Steenkamp, R.] Univ Namibia, Dept Phys, Windhoek, Namibia.
[deWilt, P.; Maxted, N.; Rowell, G.] Univ Adelaide, Sch Chem & Phys, Adelaide, SA 5005, Australia.
[Dubus, G.; Henri, G.; Pelletier, G.; Petrucci, P-O.] UJF Grenoble 1, CNRS, IPAG, INSU, F-38041 Grenoble, France.
[Dutson, K.; Hinton, J. A.; Ohm, S.; White, R.] Univ Leicester, Dept Phys & Astron, Leicester LE1 7RH, Leics, England.
[Dyrda, M.; Niemiec, J.] Inst Fizyki Jadrowej PAN, PL-31342 Krakow, Poland.
[Fiasson, A.; Komin, Nu.; Krayzel, F.; Lamanna, G.; Maurin, G.; Rosier-Lees, S.; Trichard, C.] Univ Savoie, Lab Annecy Le Vieux Phys Particules, CNRS, IN2P3, F-74941 Annecy Le Vieux, France.
[Jamrozy, M.; Ostrowski, M.; Szostek, A.; Wierzcholska, A.] Uniwersytet Jagiellonski, Obserwatorium Astronomiczne, PL-30244 Krakow, Poland.
[Katarzynski, K.; Stawarz, L.] Nicholas Copernicus Univ, Torun Ctr Astron, PL-87100 Torun, Poland.
[Ohm, S.] Charles Univ Prague, Inst Particle & Nucl Phys, Fac Math & Phys, CZ-18000 Prague 8, Czech Republic.
[Ohm, S.] Univ Leeds, Sch Phys & Astron, Leeds LS2 9JT, W Yorkshire, England.
[Perkins, J. S.; Kadler, M.] NASA, Goddard Space Flight Ctr, CRESST, Greenbelt, MD 20771 USA.
[Perkins, J. S.; Kadler, M.] NASA, Goddard Space Flight Ctr, Astroparticle Phys Lab, Greenbelt, MD 20771 USA.
[Perkins, J. S.] Univ Maryland Baltimore Cty, Baltimore, MD 21250 USA.
[Ojha, R.] NASA, Goddard Space Flight Ctr, Astrophys Sci Div, Greenbelt, MD 20771 USA.
[Ojha, R.] Catholic Univ Amer, Inst Astrophys & Computat Sci, Washington, DC 20064 USA.
[Stevens, J.] CSIRO Astron & Space Sci, Narrabri, NSW 2390, Australia.
[Edwards, P. G.] CSIRO Astron & Space Sci, Epping, NSW 1710, Australia.
[Kadler, M.] Univ Wurzburg, Inst Theoret Phys & Astrophys, D-97074 Wurzburg, Germany.
RP Abramowski, A (reprint author), Univ Hamburg, Inst Expt Phys, Luruper Chaussee 149, D-22761 Hamburg, Germany.
EM yvonne.becherini@lsw.uni-heidelberg.de; biteau@in2p3.fr;
david.sanchez@mpi-hd.mpg.de; jeremy.s.perkins@nasa.gov
RI Meyer, Manuel/E-2697-2016; Bissaldi, Elisabetta/K-7911-2016; Drury,
Luke/B-1916-2017; Moulin, Emmanuel/B-5959-2017; Daniel,
Michael/A-2903-2010; Komin, Nukri/J-6781-2015; Casanova,
Sabrina/J-8935-2013; Couturier, Camille/K-7585-2013; Tjus,
Julia/G-8145-2012; Anton, Gisela/C-4840-2013; Katz, Uli/E-1925-2013;
Fontaine, Gerard/D-6420-2014; van Eldik, Christopher/C-3901-2013;
Venter, Christo/E-6884-2011; Reimer, Olaf/A-3117-2013; Schussler,
Fabian/G-5313-2013; Katarzynski, Krzysztof/G-4528-2014; Jamrozy,
Marek/F-4507-2015
OI Meyer, Manuel/0000-0002-0738-7581; Bissaldi,
Elisabetta/0000-0001-9935-8106; Drury, Luke/0000-0002-9257-2270; Moulin,
Emmanuel/0000-0003-4007-0145; de los Reyes Lopez,
Raquel/0000-0003-0485-9552; Daniel, Michael/0000-0002-8053-7910;
Chadwick, Paula/0000-0002-1468-2685; Kneiske, Tanja
M./0000-0002-3210-6200; mohamed, mahmoud/0000-0002-4625-6242; Kruger,
Paulus/0000-0003-0664-8521; Komin, Nukri/0000-0003-3280-0582; Casanova,
Sabrina/0000-0002-6144-9122; Couturier, Camille/0000-0002-0168-1106;
Anton, Gisela/0000-0003-2039-4724; Katz, Uli/0000-0002-7063-4418; van
Eldik, Christopher/0000-0001-9669-645X; Venter,
Christo/0000-0002-2666-4812; Reimer, Olaf/0000-0001-6953-1385;
Schussler, Fabian/0000-0003-1500-6571;
FU German Ministry for Education and Research (BMBF); Max Planck Society;
French Ministry for Research; CNRS-IN2P3; Astroparticle
Interdisciplinary Programme of the CNRS; UK Particle Physics and
Astronomy Research Council (PPARC); IPNP of the Charles University;
South African Department of Science and Technology; National Research
Foundation; University of Namibia; Istituto Nazionale di Astrofisica in
Italy; Centre National d'Etudes Spatiales in France; Commonwealth of
Australia; NASA [NNH09ZDA001N]; NASA post-doctoral Programme at the
Goddard Space Flight Center
FX The support of the Namibian authorities and of the University of Namibia
in facilitating the construction and operation of HESS is gratefully
acknowledged, as is the support by the German Ministry for Education and
Research (BMBF), the Max Planck Society, the French Ministry for
Research, the CNRS-IN2P3 and the Astroparticle Interdisciplinary
Programme of the CNRS, the UK Particle Physics and Astronomy Research
Council (PPARC), the IPNP of the Charles University, the South African
Department of Science and Technology and National Research Foundation,
and by the University of Namibia. We appreciate the excellent work of
the technical support staff in Berlin, Durham, Hamburg, Heidelberg,
Palaiseau, Paris, Saclay, and in Namibia in the construction and
operation of the equipment.; Additional support for science analysis
during the operations phase is gratefully acknowledged from the Istituto
Nazionale di Astrofisica in Italy and the Centre National d'Etudes
Spatiales in France.; The ATCA is part of the Australia Telescope
National Facility which is funded by the Commonwealth of Australia for
operation as a National Facility managed by CSIRO. This research was
funded in part by NASA through Fermi Guest Investigator grant
NNH09ZDA001N (proposal number 31263). This research was supported by an
appointment to the NASA post-doctoral Programme at the Goddard Space
Flight Center, administered by Oak Ridge Associated Universities through
a contract with NASA.
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PI OXFORD
PA GREAT CLARENDON ST, OXFORD OX2 6DP, ENGLAND
SN 0035-8711
J9 MON NOT R ASTRON SOC
JI Mon. Not. Roy. Astron. Soc.
PD SEP
PY 2013
VL 434
IS 3
BP 1889
EP 1901
DI 10.1093/mnras/stt1081
PG 13
WC Astronomy & Astrophysics
SC Astronomy & Astrophysics
GA 207YE
UT WOS:000323639900006
ER
PT J
AU Roy, R
Kumar, B
Maund, JR
Schady, P
Olivares, EF
Malesani, D
Leloudas, G
Nandi, S
Tanvir, N
Milisavljevic, D
Hjorth, J
Misra, K
Kumar, B
Pandey, SB
Sagar, R
Chandola, HC
AF Roy, Rupak
Kumar, Brijesh
Maund, Justyn R.
Schady, Patricia
Olivares, E. Felipe
Malesani, Daniele
Leloudas, Giorgos
Nandi, Sumana
Tanvir, Nial
Milisavljevic, Dan
Hjorth, Jens
Misra, Kuntal
Kumar, Brajesh
Pandey, S. B.
Sagar, Ram
Chandola, H. C.
TI SN 2007uy-metamorphosis of an aspheric Type Ib explosion
SO MONTHLY NOTICES OF THE ROYAL ASTRONOMICAL SOCIETY
LA English
DT Article
DE supernovae: general; supernovae: individual: SN 2007uy; galaxies:
individual: NGC 2770
ID CORE-COLLAPSE SUPERNOVA; EXPANDING PHOTOSPHERE METHOD; GAMMA-RAY BURST;
HUBBLE-SPACE-TELESCOPE; LIGHT CURVES; IC SUPERNOVA; IA SUPERNOVAE;
STRIPPED-ENVELOPE; RADIO SUPERNOVAE; X-RAY
AB The supernovae (SNe) of Type Ibc are rare and the detailed characteristics of these explosions have been studied only for a few events. Unlike Type II SNe, the progenitors of Type Ibc have never been detected in pre-explosion images. So, to understand the nature of their progenitors and the characteristics of the explosions, investigation of proximate events is necessary. Here we present the results of multiwavelength observations of Type Ib SN 2007uy in the nearby (similar to 29.5 Mpc) galaxy NGC 2770. Analysis of the photometric observations revealed this explosion as an energetic event with peak absolute R-band magnitude -18.5 +/- 0.16, which is about 1 mag brighter than the mean value (-17.6 +/- 0.6) derived for well observed Type Ibc events. The SN is highly extinguished, E(B - V) = 0.63 +/- 0.15 mag, mainly due to foreground material present in the host galaxy. From optical light curve modelling we determine that about 0.3 M-circle dot radioactive Ni-56 is produced and roughly 4.4 M-circle dot material is ejected during this explosion with liberated energy similar to 15 x 10(51) erg, indicating the event to be an energetic one. Through optical spectroscopy, we have noticed a clear aspheric evolution of several line-forming regions, but no dependency of asymmetry is seen on the distribution of Ni-56 inside the ejecta. The SN shock interaction with the circumstellar material is clearly noticeable in radio follow-up, presenting a synchrotron self-absorption dominated light curve with a contribution of free-free absorption during the early phases. Assuming a Wolf-Rayet (WR) star, with wind velocity greater than or similar to 10(3) km s(- 1), as a progenitor, we derive a lower limit to the mass-loss rate inferred from the radio data as M 2.4 10(-5) M-circle dot yr(-1), which is consistent with the results obtained for other Type Ibc SNe bright at radio frequencies.
C1 [Roy, Rupak; Kumar, Brijesh; Nandi, Sumana; Misra, Kuntal; Kumar, Brajesh; Pandey, S. B.; Sagar, Ram] Aryabhatta Res Inst Observat Sci, Manora Peak 263002, Nainital, India.
[Maund, Justyn R.] Queens Univ Belfast, Sch Math & Phys, Astrophys Res Ctr, Belfast BT7 1NN, Antrim, North Ireland.
[Schady, Patricia; Olivares, E. Felipe] Max Planck Inst Extraterr Phys, D-85748 Garching, Germany.
[Malesani, Daniele; Leloudas, Giorgos; Hjorth, Jens] Univ Copenhagen, Niels Bohr Inst, Dark Cosmol Ctr, DK-2100 Copenhagen O, Denmark.
[Leloudas, Giorgos] Stockholm Univ, Albanova Univ Ctr, Dept Phys, Oskar Klein Ctr, S-10691 Stockholm, Sweden.
[Tanvir, Nial] Univ Leicester, Dept Phys & Astron, Leicester LE1 7RH, Leics, England.
[Milisavljevic, Dan] Harvard Smithsonian Ctr Astrophys, Cambridge, MA 02138 USA.
[Chandola, H. C.] Kumaun Univ, Dept Phys, Naini Tal 263002, India.
RP Roy, R (reprint author), Aryabhatta Res Inst Observat Sci, Manora Peak 263002, Nainital, India.
EM roy@aries.res.in
RI Hjorth, Jens/M-5787-2014;
OI Hjorth, Jens/0000-0002-4571-2306; Maund, Justyn/0000-0003-0733-7215
FU ESO programs [080.C-0833, 080.D-0229, 081.D-0173, 082.D-0292]; DNRF;
Swedish Research Council [623-2011-7117]; COSPAR fellowship program;
DST-RFBR [INT/RFBR/P-25, INT/RFBR/P-100]
FX We thank all the observers at ARIES who provided their valuable time and
support for the observations of this event. The work is based on
observations made with the Nordic Optical Telescope, operated by the
Nordic Optical Telescope Scientific Association at the Observatorio del
Roque de los Muchachos, La Palma, Spain, of the Instituto de Astrofisica
de Canarias. This work is partly based on the data obtained from the ESO
Science Archive Facility, and data were collected under ESO programs
080.C-0833 (PI Elias-Rosa), 080.D-0229 (PI Della Valle), 081.D-0173 (PI
Mazzali) and 082.D-0292 (PI Mazzali). We are thankful to the observing
staffs of NOT, UKIRT, NTT, MMT and VLT for their kind cooperation in
observation of SN 2007uy. This work is based on the data obtained from
the ESO Science Archive Facility. For this research work the VLA radio
data have been used. The VLA is operated by the National Radio Astronomy
Observatory, a facility of the National Science Foundation operated
under cooperative agreement by Associated Universities, Inc. DARK is
funded by the DNRF. GL is supported by the Swedish Research Council
through grant No. 623-2011-7117. RR is thankful to the COSPAR fellowship
program under which, he got the opportunity to visit DARK and initiated
the entire project. SBP and RR acknowledge DST-RFBR grants INT/RFBR/P-25
(2008-2010) and INT/RFBR/P-100 (2011-2013) for the present work. This
research has made use of Swift/UVOT data obtained through the High
Energy Astrophysics Science Archive Research Center (HEASARC) Online
Service, provided by the NASA/Goddard Space Flight Center. The authors
would also like to thank the anonymous referee for the comments and
suggestions which helped in improvement of the paper.
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SN 0035-8711
J9 MON NOT R ASTRON SOC
JI Mon. Not. Roy. Astron. Soc.
PD SEP
PY 2013
VL 434
IS 3
BP 2032
EP 2050
DI 10.1093/mnras/stt1148
PG 19
WC Astronomy & Astrophysics
SC Astronomy & Astrophysics
GA 207YE
UT WOS:000323639900018
ER
PT J
AU Zhu, YC
Narayan, R
AF Zhu, Yucong
Narayan, Ramesh
TI Thermal stability in turbulent accretion discs
SO MONTHLY NOTICES OF THE ROYAL ASTRONOMICAL SOCIETY
LA English
DT Article
DE accretion; accretion discs; black hole physics; convection; turbulence
ID ACTIVE GALACTIC NUCLEI; X-RAY SOURCES; BLACK-HOLES; VERTICAL STRUCTURE;
LOCAL SIMULATIONS; ENERGY-TRANSPORT; BINARY-SYSTEMS; DISKS; INSTABILITY;
MODELS
AB The standard thin accretion disc model predicts that discs around stellar mass black holes become radiation-pressure dominated and thermally unstable once their luminosity exceeds L greater than or similar to 0.02L(Edd). Observationally, discs in the high/soft state of X-ray binaries show little variability in the range 0.01L(Edd) < L < 0.5L(Edd), implying that these discs in nature are in fact quite stable. In an attempt to reconcile this conflict, we investigate one-zone disc models including turbulent and convective modes of vertical energy transport. We find both mixing mechanisms to have a stabilizing effect, leading to an increase in the L threshold up to which the disc is thermally stable. In the case of stellar mass black hole systems, convection alone leads to only a minor increase in this threshold, up to similar to 5 per cent of Eddington. However, turbulent mixing has a much greater effect - the threshold rises up to 20 per cent Eddington under reasonable assumptions. In optimistic models with superefficient turbulent mixing, we even find solutions that are completely thermally stable for all accretion rates. Similar results are obtained for supermassive black holes, except that all critical accretion rates are a factor of similar to 10 lower in Eddington ratio.
C1 [Zhu, Yucong; Narayan, Ramesh] Harvard Smithsonian Ctr Astrophys, Cambridge, MA 02138 USA.
RP Zhu, YC (reprint author), Harvard Smithsonian Ctr Astrophys, 60 Garden St, Cambridge, MA 02138 USA.
EM yzhu@cfa.harvard.edu; rnarayan@cfa.harvard.edu
OI Narayan, Ramesh/0000-0002-1919-2730
FU NASA [NNX11AE16G]
FX The authors would like to thank Robert Penna, Aleksander Sadowski and
Dmitrios Psaltis for insightful discussions about disc convection. We
thank the anonymous referee for providing illuminating comments and
helping us craft a much clearer paper. YZ also thanks Tanmoy Laskar for
helpful suggestions for improving the presentation of the manuscript. YZ
was supported by the Smithsonian Institution Endowment Funds. This work
was supported in part by NASA grant NNX11AE16G.
NR 51
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PI OXFORD
PA GREAT CLARENDON ST, OXFORD OX2 6DP, ENGLAND
SN 0035-8711
J9 MON NOT R ASTRON SOC
JI Mon. Not. Roy. Astron. Soc.
PD SEP
PY 2013
VL 434
IS 3
BP 2262
EP 2274
DI 10.1093/mnras/stt1161
PG 13
WC Astronomy & Astrophysics
SC Astronomy & Astrophysics
GA 207YE
UT WOS:000323639900033
ER
PT J
AU Rivilla, VM
Martin-Pintado, J
Sanz-Forcada, J
Jimenez-Serra, I
Rodriguez-Franco, A
AF Rivilla, V. M.
Martin-Pintado, J.
Sanz-Forcada, J.
Jimenez-Serra, I.
Rodriguez-Franco, A.
TI X-ray embedded stars as driving sources of outflow-driven turbulence in
OMC1-S
SO MONTHLY NOTICES OF THE ROYAL ASTRONOMICAL SOCIETY
LA English
DT Article
DE turbulence; stars: formation; stars: massive; stars: pre-main sequence;
ISM: jets and outflows; X-rays: stars
ID YOUNG STELLAR OBJECTS; ORION ULTRADEEP PROJECT; RADIATION-HYDRODYNAMIC
SIMULATIONS; SPECTRAL ENERGY-DISTRIBUTIONS; R2 MOLECULAR CLOUD; LOW-MASS
STAR; NEBULA CLUSTER; TRAPEZIUM CLUSTER; OMC-1 SOUTH; GRAVITATIONAL
COLLAPSE
AB Outflows arising from very young stars affect their surroundings and influence the star formation in the parental core. Multiple molecular outflows and Herbig-Haro (HH) objects have been observed in Orion, many of them originating from the embedded massive star-forming region known as OMC1-S. The detection of the outflow-driving sources is commonly difficult, because they are still hidden behind large extinction, preventing their direct observation at optical and even near- and mid-IR wavelengths. With the aim of improving the identification of the driving sources of the multiple outflows detected in OMC1-S, we used the catalogue provided by deep X-ray observations, which have unveiled the very embedded population of pre-main-sequence stars. We compared the position of stars observed by the Chandra Orion Ultra-Deep Project (COUP) in OMC1-S with the morphology of the molecular outflows and the directions of measured proper motions of HH optical objects. We find that six out of seven molecular outflows reported in OMC1-S (detection rate of 86 per cent) have an extincted X-ray COUP star located at the expected position of the driving source. In several cases, X-rays detected the possible driving sources for the first time. This clustered embedded population revealed by Chandra is very young, with an estimated average age of a few 10(5) yr. It is also likely responsible for the multiple HH objects, which are the optical correspondence of flows arising from the cloud. We show that the molecular outflows driven by the members of the OMC1-S cluster can account for the observed turbulence at core scales and regulate the star formation efficiency. We discuss the effects of outflow feedback in the formation of massive stars, concluding that the injected turbulence in OMC1-S is compatible with a competitive accretion scenario.
C1 [Rivilla, V. M.; Martin-Pintado, J.; Sanz-Forcada, J.; Rodriguez-Franco, A.] Ctr Astrobiol CSIC INTA, E-28850 Madrid, Spain.
[Jimenez-Serra, I.] Harvard Smithsonian Ctr Astrophys, Cambridge, MA 02138 USA.
[Jimenez-Serra, I.] European So Observ, D-85748 Garching, Germany.
RP Rivilla, VM (reprint author), Ctr Astrobiol CSIC INTA, Ctra Torrejon Ajalvir,Km 4, E-28850 Madrid, Spain.
EM ryvendel@gmail.com
RI Sanz-Forcada, Jorge/C-3176-2017; Martin-Pintado, Jesus/H-6107-2015
OI Sanz-Forcada, Jorge/0000-0002-1600-7835; Martin-Pintado,
Jesus/0000-0003-4561-3508
FU MICINN [AYA2010-21697-C05-01, FIS2012-39162-C06-01]; Astro-Madrid [CAM
S2009/ESP-1496]; CSIC [JAE-Predoc2008]; European Union
[PIIF-GA-2011-301538]
FX We thank the referee, Dr Thomas Stanke, for his critical reading of the
original version of this paper and his helpful suggestions. This work
has been partially funded by MICINN grants AYA2010-21697-C05-01 and
FIS2012-39162-C06-01, and Astro-Madrid (CAM S2009/ESP-1496) and CSIC
grant JAE-Predoc2008. IJ-S acknowledges the funding received from the
People Programme (Marie Curie Actions) of the European Union's Seventh
Framework Programme (FP7/2007-2013) under REA grant agreement number
PIIF-GA-2011-301538.
NR 94
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PI OXFORD
PA GREAT CLARENDON ST, OXFORD OX2 6DP, ENGLAND
SN 0035-8711
J9 MON NOT R ASTRON SOC
JI Mon. Not. Roy. Astron. Soc.
PD SEP
PY 2013
VL 434
IS 3
BP 2313
EP 2328
DI 10.1093/mnras/stt1173
PG 16
WC Astronomy & Astrophysics
SC Astronomy & Astrophysics
GA 207YE
UT WOS:000323639900037
ER
PT J
AU Tombesi, F
Reeves, JN
Reynolds, CS
Garcia, J
Lohfink, A
AF Tombesi, F.
Reeves, J. N.
Reynolds, C. S.
Garcia, J.
Lohfink, A.
TI An outburst scenario for the X-ray spectral variability in 3C 111
SO MONTHLY NOTICES OF THE ROYAL ASTRONOMICAL SOCIETY
LA English
DT Article
DE accretion, accretion discs; black hole physics; line: identification;
plasmas; galaxies: active; X-rays: galaxies
ID ACTIVE GALACTIC NUCLEI; ACCRETION DISC OUTFLOWS; LINE RADIO GALAXIES;
ULTRA-FAST OUTFLOWS; ADVECTION-DOMINATED ACCRETION; SHELL
ABSORPTION-LINES; XMM-NEWTON OBSERVATION; SPINNING BLACK-HOLE;
SEYFERT-GALAXIES; SUZAKU VIEW
AB We present a combined Suzaku and Swift BAT broad-band E = 0.6-200 keV spectral analysis of three 3C 111 observations obtained in 2010. The data are well described with an absorbed power-law continuum and a weak (R similar or equal to 0.2) cold reflection component from distant material. We constrain the continuum cutoff at E-C similar or equal to 150-200 keV, which is in accordance with X-ray Comptonization corona models and supports claims that the jet emission is only dominant at much higher energies. Fe xxvi Ly alpha emission and absorption lines are also present in the first and second observations, respectively. The modelling and interpretation of the emission line is complex and we explore three possibilities. If originating from ionized-disc reflection, this should be emitted at r(in) >= 50 r(g) or, in the lamp-post configuration, the illuminating source should be at a height of h >= 30 r(g) above the black hole. Alternatively, the line could be modelled with a hot collisionally ionized plasma with temperature kT = 22.0(-3.2)(+6.1) keV or a photoionized plasma with log xi = 4.52(-0.16)(+0.10)erg s(-1) cm and column density N-H > 3 x 10(23) cm(-2). However, the first and second scenarios are less favoured on statistical and physical grounds, respectively. The blueshifted absorption line in the second observation can be modelled as an ultrafast outflow (UFO) with ionization parameter log xi = 4.47(-0.04)(+0.76)erg s(-1) cm, column density N-H = (5.3(-1.3)(+1.8)) x 10(22) cm(-2) and outflow velocity v(out) = 0.104 +/- 0.006c. Interestingly, the parameters of the photoionized emission model remarkably match those of the absorbing UFO, supporting the possibility that the same material could be responsible for both emission and absorption. We suggest an outburst scenario in which an accretion disc wind, initially lying out of the line of sight and observed in emission, then crosses our view to the source and it is observed in absorption as a mildly relativistic UFO.
C1 [Tombesi, F.] NASA, Goddard Space Flight Ctr, Xray Astrophys Lab, Greenbelt, MD 20771 USA.
[Tombesi, F.; Reynolds, C. S.; Garcia, J.; Lohfink, A.] Univ Maryland, Dept Astron, College Pk, MD 20742 USA.
[Reeves, J. N.] Keele Univ, Astrophys Grp, Sch Phys & Geog Sci, Keele ST5 5BG, Staffs, England.
[Garcia, J.] Harvard Smithsonian Ctr Astrophys, Cambridge, MA 02138 USA.
RP Tombesi, F (reprint author), NASA, Goddard Space Flight Ctr, Xray Astrophys Lab, Greenbelt, MD 20771 USA.
EM ftombesi@astro.umd.edu
RI XRAY, SUZAKU/A-1808-2009
FU National Aeronautics and Space Administration [NNX12AH40G]; Astrophysics
Data Analysis Program, part of the ROSES
FX The authors thank the referee for the thorough reading and the
constructive comments that led to improvements in the paper. FT thank K.
Fukumura, D. Kazanas, R. Nemmen, R. F. Mushotzky, S. B. Kraemer, M.
Cappi and H. L. Marshall for the useful discussions. FT acknowledges
partial support for this work by the National Aeronautics and Space
Administration under Grant No. NNX12AH40G issued through the
Astrophysics Data Analysis Program, part of the ROSES 2010.
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SN 0035-8711
J9 MON NOT R ASTRON SOC
JI Mon. Not. Roy. Astron. Soc.
PD SEP
PY 2013
VL 434
IS 3
BP 2707
EP 2717
DI 10.1093/mnras/stt1213
PG 11
WC Astronomy & Astrophysics
SC Astronomy & Astrophysics
GA 207YE
UT WOS:000323639900071
ER
PT J
AU Adams, ER
Ciardi, DR
Dupree, AK
Gautier, TN
Kulesa, C
McCarthy, D
AF Adams, E. R.
Ciardi, D. R.
Dupree, A. K.
Gautier, T. N., III
Kulesa, C.
McCarthy, D.
TI ADAPTIVE OPTICS IMAGES OF KEPLER OBJECTS OF INTEREST (vol 144, 42, 2012)
SO ASTRONOMICAL JOURNAL
LA English
DT Correction
C1 [Adams, E. R.; Dupree, A. K.] Harvard Smithsonian Ctr Astrophys, Cambridge, MA 02138 USA.
[Ciardi, D. R.] NASA, Exoplanet Sci Inst, Pasadena, CA 91125 USA.
[Gautier, T. N., III] CALTECH, Jet Prop Lab, Pasadena, CA 91109 USA.
[Kulesa, C.; McCarthy, D.] Univ Arizona, Steward Observ, Tucson, AZ 85721 USA.
RP Adams, ER (reprint author), Harvard Smithsonian Ctr Astrophys, 60 Garden St, Cambridge, MA 02138 USA.
NR 1
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PI BRISTOL
PA TEMPLE CIRCUS, TEMPLE WAY, BRISTOL BS1 6BE, ENGLAND
SN 0004-6256
J9 ASTRON J
JI Astron. J.
PD SEP
PY 2013
VL 146
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AR 71
DI 10.1088/0004-6256/146/3/71
PG 2
WC Astronomy & Astrophysics
SC Astronomy & Astrophysics
GA 203OO
UT WOS:000323302700028
ER
PT J
AU Bowler, BP
Liu, MC
Shkolnik, EL
Dupuy, TJ
AF Bowler, Brendan P.
Liu, Michael C.
Shkolnik, Evgenya L.
Dupuy, Trent J.
TI PLANETS AROUND LOW-MASS STARS. III. A YOUNG DUSTY L DWARF COMPANION AT
THE DEUTERIUM-BURNING LIMIT
SO ASTROPHYSICAL JOURNAL
LA English
DT Article
DE brown dwarfs; stars: individual (2MASS J01225093-2439505); stars:
low-mass
ID NEAR-INFRARED SPECTRA; ALL-SKY SURVEY; VERY-LOW MASS; EXTRASOLAR GIANT
PLANETS; COLOR-MAGNITUDE DIAGRAMS; DORADUS MOVING GROUP; ORBITING HR
8799; SOLAR-TYPE STARS; BINARY T DWARF; FIELD M-DWARFS
AB We report the discovery of an L-type companion to the young M3.5V star 2MASS J01225093-2439505 at a projected separation of 1 ''.45 (approximate to 52 AU) as part of our adaptive optics imaging search for extrasolar giant planets around young low-mass stars. 2MASS 0122-2439 B has very red near-infrared colors similar to the HR 8799 planets and the reddest known young/dusty L dwarfs in the field. Moderate-resolution (R approximate to 3800) 1.5-2.4 mu m spectroscopy reveals a near-infrared spectral type of L4-L6 and an angular H-band shape, confirming its cool temperature and young age. The kinematics of 2MASS 0122-2439 AB are marginally consistent with members of the similar to 120 Myr AB Dor young moving group based on the photometric distance to the primary (36 +/- 4 pc) and our radial velocity measurement of 2MASS 0122-2439 A from Keck/HIRES. We adopt the AB Dor group age for the system, but the high energy emission, lack of Li I lambda 6707 absorption, and spectral shape of 2MASS 0122-2439 B suggest a range of similar to 10-120 Myr is possible. The age and luminosity of 2MASS 0122-2439 B fall in a strip where "hot-start" evolutionary model mass tracks overlap as a result of deuterium burning. Several known substellar companions also fall in this region (2MASS J0103-5515 ABb, AB Pic b, kappa And b, G196-3 B, SDSS 2249+0044 B, LP 261-75 B, HD 203030 B, and HN Peg B), but their dual-valued mass predictions have largely been unrecognized. The implied mass of 2MASS 0122-2439 B is approximate to 12-13 M-Jup or approximate to 22-27 M-Jup if it is an AB Dor member, or possibly as low as 11 M-Jup if the wider age range is adopted. Evolutionary models predict an effective temperature for 2MASS 0122-2439 B that corresponds to spectral types near the L/T transition (approximate to 1300-1500 K) for field objects. However, we find a mid-L near-infrared spectral type, indicating that 2MASS 0122-2439 B represents another case of photospheric dust being retained to cooler temperatures at low surface gravities, as seen in the spectra of young (8-30 Myr) planetary companions. Altogether, the low mass, low temperature, and red colors of 2MASS 0122-2439 B make it a bridge between warm planets like beta Pic b and cool, very dusty ones like HR 8799 bcde.
C1 [Bowler, Brendan P.; Liu, Michael C.] Univ Hawaii, Inst Astron, Honolulu, HI 96822 USA.
[Shkolnik, Evgenya L.] Lowell Observ, Flagstaff, AZ 86001 USA.
[Dupuy, Trent J.] Harvard Smithsonian Ctr Astrophys, Cambridge, MA 02138 USA.
RP Bowler, BP (reprint author), Univ Hawaii, Inst Astron, 2680 Woodlawn Dr, Honolulu, HI 96822 USA.
EM bpbowler@ifa.hawaii.edu
FU NASA [NNX11AC31G]; NSF [AST09-09222]; NASA/GALEX [NNX12AC18G]; National
Aeronautics and Space Administration; National Science Foundation
FX We thank our anonymous referee for helpful comments; Fred Vrba and the
USNO group for sharing their parallax for LP 261-75 B; Katelyn Allers,
Zahed Wahhaj, Davy Kirkpatrick, David Lafreniere, and Jennifer Patience
for the low-gravity spectra used in this work; Yosuke Minowa for
assistance with the IRCS observations; Eric Nielsen for his compilation
of YMG members; and Katelyn Allers for assistance with the LP 261-75 B
observations. It is a pleasure to thank the Keck support astronomers and
operating assistants who helped make this work possible: Joel Aycock,
Randy Campbell, Marc Kassis, Jim Lyke, Terry Stickel, and Hien Tran. B.
P. B. and M. C. L. have been supported by NASA grant NNX11AC31G and NSF
grant AST09-09222. E. S. has been supported by NASA/GALEX grant
NNX12AC18G. We utilized data products from the Two Micron All Sky
Survey, which is a joint project of the University of Massachusetts and
the Infrared Processing and Analysis Center/California Institute of
Technology, funded by the National Aeronautics and Space Administration
and the National Science Foundation. This publication makes use of data
products from the Wide-field Infrared Survey Explorer, which is a joint
project of the University of California, Los Angeles, and the Jet
Propulsion Laboratory/California Institute of Technology, funded by the
National Aeronautics and Space Administration (NASA). NASA's
Astrophysics Data System Bibliographic Services, the VizieR catalog
access tool, and the SIMBAD database operated at CDS, Strasbourg,
France, were invaluable resources for this work. Finally, mahalo nui loa
to the kama'aina of Hawai'i for their support of Keck and the Mauna Kea
observatories. We are grateful to conduct observations from this
mountain.
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PA TEMPLE CIRCUS, TEMPLE WAY, BRISTOL BS1 6BE, ENGLAND
SN 0004-637X
J9 ASTROPHYS J
JI Astrophys. J.
PD SEP 1
PY 2013
VL 774
IS 1
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DI 10.1088/0004-637X/774/1/55
PG 12
WC Astronomy & Astrophysics
SC Astronomy & Astrophysics
GA 205FA
UT WOS:000323426700055
ER
PT J
AU Castro, D
Slane, P
Carlton, A
Figueroa-Feliciano, E
AF Castro, Daniel
Slane, Patrick
Carlton, Ashley
Figueroa-Feliciano, Enectali
TI FERMI-LAT OBSERVATIONS OF SUPERNOVA REMNANTS INTERACTING WITH MOLECULAR
CLOUDS: W41, MSH 17-39, AND G337.7-0.1
SO ASTROPHYSICAL JOURNAL
LA English
DT Article
DE acceleration of particles; cosmic rays; gamma rays: ISM; ISM: individual
objects (W41, MSH 17-39, G337.7-0.1); ISM: supernova remnants
ID COSMIC-RAY ACCELERATION; LARGE-AREA TELESCOPE; SNR RX J1713.7-3946; MHZ
MASER EMISSION; HIGH-ENERGY; GAMMA-RAYS; POLARIZATION OBSERVATIONS;
PARTICLE-ACCELERATION; SWIFT J1834.9-0846; NONTHERMAL RADIO
AB We report the detection of gamma-ray emission coincident with three supernova remnants (SNRs) using data from the Large Area Telescope on board the Fermi Gamma-ray Space Telescope. W41, G337.7-0.1, and MSH 17-39 are SNRs known to be interacting with molecular clouds, as evidenced by observations of hydroxyl (OH) maser emission at 1720 MHz in their directions and other observational information. SNR shocks are expected to be sites of cosmic-ray acceleration, and clouds of dense material can provide effective targets for production of gamma-rays from pi(0)-decay. The observations reveal unresolved sources in the direction of G337.7-0.1 and MSH 17-39 and an extended source coincident with W41. We model their broadband emission (radio to gamma-ray) using a simple one-zone model, and after considering scenarios in which the MeV-TeV sources originate from either pi(0)-decay or leptonic emission, we conclude that the gamma-rays are most likely produced through the hadronic channel.
C1 [Castro, Daniel; Figueroa-Feliciano, Enectali] MIT Kavli Ctr Astrophys & Space Res, Cambridge, MA 02139 USA.
[Slane, Patrick; Carlton, Ashley] Harvard Smithsonian Ctr Astrophys, Cambridge, MA 02138 USA.
RP Castro, D (reprint author), MIT Kavli Ctr Astrophys & Space Res, 77 Massachusetts Ave, Cambridge, MA 02139 USA.
OI , /0000-0002-7463-6007
FU NASA [NNX10AP70G]; National Aeronautics and Space Administration through
the Smithsonian Astrophysical Observatory [SV3-73016]; National
Aeronautics Space Administration [NAS8-03060]
FX The authors thank Stefan Funk, Elizabeth Hays, and Joshua Lande for
their advise regarding Fermi-LAT data analysis. We also thank Dale Frail
for conversations about SNR-MC interaction. Additionally, the authors
thank the referee for constructive comments and recommendations that
have strengthened the paper. This work was partially funded by NASA
Fermi grant NNX10AP70G.; D.C. also acknowledges support for this work
provided by the National Aeronautics and Space Administration through
the Smithsonian Astrophysical Observatory contract SV3-73016 to MIT for
Support of the Chandra X-Ray Observatory, which is operated by the
Smithsonian Astrophysical Observatory for and on behalf of the National
Aeronautics Space Administration under contract NAS8-03060. P.O.S.
acknowledges partial support from NASA contract NAS8-03060.
NR 71
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PA TEMPLE CIRCUS, TEMPLE WAY, BRISTOL BS1 6BE, ENGLAND
SN 0004-637X
J9 ASTROPHYS J
JI Astrophys. J.
PD SEP 1
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VL 774
IS 1
AR UNSP 36
DI 10.1088/0004-637X/774/1/36
PG 9
WC Astronomy & Astrophysics
SC Astronomy & Astrophysics
GA 205FA
UT WOS:000323426700036
ER
PT J
AU Chakraborti, S
Ray, A
Smith, R
Ryder, S
Yadav, N
Sutaria, F
Dwarkadas, VV
Chandra, P
Pooley, D
Roy, R
AF Chakraborti, Sayan
Ray, Alak
Smith, Randall
Ryder, Stuart
Yadav, Naveen
Sutaria, Firoza
Dwarkadas, Vikram V.
Chandra, Poonam
Pooley, David
Roy, Rupak
TI THE PROGENITOR OF SN 2011ja: CLUES FROM CIRCUMSTELLAR INTERACTION
SO ASTROPHYSICAL JOURNAL
LA English
DT Article
DE circumstellar matter; radio continuum: general; shock waves; stars:
mass-loss; supernovae: individual (SN 2011ja); X-rays: general
ID X-RAY-EMISSION; II-P SUPERNOVAE; RADIO-EMISSION; MASS-LOSS; IC
SUPERNOVAE; LIGHT CURVES; ABSORPTION; 2004ET; EXPLOSION; SN-2004ET
AB Massive stars, possibly red supergiants, which retain extended hydrogen envelopes until core collapse, produce Type II plateau (IIP) supernovae. The ejecta from these explosions shocks the circumstellar matter originating from the mass loss of the progenitor during the final phases of its life. This interaction accelerates particles to relativistic energies which then lose energy via synchrotron radiation in the shock-amplified magnetic fields and inverse Compton scattering against optical photons from the supernova. These processes produce different signatures in the radio and X-ray parts of the electromagnetic spectrum. Observed together, they allow us to break the degeneracy between shock acceleration and magnetic field amplification. In this work, we use X-rays observations from the Chandra and radio observations from the Australia Telescope Compact Array to study the relative importance of processes which accelerate particles and those which amplify magnetic fields in producing the non-thermal radiation from SN 2011ja. We use radio observations to constrain the explosion date. Multiple Chandra observations allow us to probe the history of variable mass loss from the progenitor. The ejecta expands into a low-density bubble followed by interaction with a higher density wind from a red supergiant consistent with M-ZAMS greater than or similar to 12M(circle dot). Our results suggest that a fraction of Type IIP supernovae may interact with circumstellar media set up by non-steady winds.
C1 [Chakraborti, Sayan] Harvard Smithsonian Ctr Astrophys, Inst Theory & Computat, Cambridge, MA 02138 USA.
[Ray, Alak; Yadav, Naveen] Tata Inst Fundamental Res, Bombay 400005, Maharashtra, India.
[Smith, Randall] Harvard Smithsonian Ctr Astrophys, Cambridge, MA 02138 USA.
[Ryder, Stuart] Australian Astron Observ, N Ryde, NSW 1670, Australia.
[Sutaria, Firoza] Indian Inst Astrophys, Bangalore 560034, Karnataka, India.
[Dwarkadas, Vikram V.] Univ Chicago, Dept Astron & Astrophys, Chicago, IL 60637 USA.
[Chandra, Poonam] Royal Mil Coll Canada, Dept Phys, Kingston, ON K7K 7B4, Canada.
[Pooley, David] Sam Houston State Univ, Dept Phys, Huntsville, TX 77340 USA.
[Roy, Rupak] Aryabhatta Res Inst Observat Sci, Manora Peak, Nainital, India.
RP Chakraborti, S (reprint author), Harvard Univ, Soc Fellows, 78 Mt Auburn St, Cambridge, MA 02138 USA.
EM schakraborti@fas.harvard.edu
OI Yadav, Naveen/0000-0002-4107-9443
FU Commonwealth of Australia; National Aeronautics and Space Administration
by the Chandra X-Ray Observatory Center [13500809]; National Aeronautics
Space Administration [NAS8-03060]; Twelfth Five Year Plan Program at
TIFR [12P-407]; CSIR
FX This research has made use of data obtained using the Chandra X-Ray
Observatory through an advance target of opportunity program and
software provided by the Chandra X-Ray Center (CXC) in the application
packages CIAO and ChIPS. We thank CXC Director Harvey Tananbaum for the
second epoch of Chandra observation which was made possible using the
Director's Discretionary Time. The ATCA is part of the Australia
Telescope National Facility which is funded by the Commonwealth of
Australia for operation as a National Facility managed by CSIRO. We
thank the staff of the GMRT that made GMRT observations possible. GMRT
is run by the National Centre for Radio Astrophysics of the Tata
Institute of Fundamental Research. Support for this work was provided by
the National Aeronautics and Space Administration through Chandra Award
Number 13500809 issued by the Chandra X-Ray Observatory Center, which is
operated by the Smithsonian Astrophysical Observatory for and on behalf
of the National Aeronautics Space Administration under contract
NAS8-03060. A.R. thanks the Department of Physics at West Virginia
University for hospitality and the Twelfth Five Year Plan Program
12P-407 at TIFR. N.Y. is supported by the CSIR S.P. Mukherjee
Fellowship.
NR 64
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PA TEMPLE CIRCUS, TEMPLE WAY, BRISTOL BS1 6BE, ENGLAND
SN 0004-637X
J9 ASTROPHYS J
JI Astrophys. J.
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PG 8
WC Astronomy & Astrophysics
SC Astronomy & Astrophysics
GA 205FA
UT WOS:000323426700030
ER
PT J
AU Chornock, R
Berger, E
Fox, DB
Lunnan, R
Drout, MR
Fong, WF
Laskar, T
Roth, KC
AF Chornock, Ryan
Berger, Edo
Fox, Derek B.
Lunnan, Ragnhild
Drout, Maria R.
Fong, Wen-fai
Laskar, Tanmoy
Roth, Katherine C.
TI GRB 130606A AS A PROBE OF THE INTERGALACTIC MEDIUM AND THE INTERSTELLAR
MEDIUM IN A STAR-FORMING GALAXY IN THE FIRST Gyr AFTER THE BIG BANG
SO ASTROPHYSICAL JOURNAL
LA English
DT Article
DE dark ages, reionization, first stars; galaxies: abundances; gamma-ray
burst: individual (GRB 130606A); intergalactic medium
ID GAMMA-RAY-BURST; GUNN-PETERSON TROUGH; DIGITAL SKY SURVEY; LY-ALPHA
FOREST; METAL ABSORPTION-LINES; SIMILAR-TO 5-6; Z-GREATER-THAN-5.7
QUASARS; Z-SIMILAR-TO-6 QUASARS; PHOTOMETRIC REDSHIFT; ADDITIONAL
QUASARS
AB We present high signal-to-noise ratio Gemini and MMT spectroscopy of the optical afterglow of the gamma-ray burst (GRB) 130606A at redshift z = 5.913, discovered by Swift. This is the first high-redshift GRB afterglow to have spectra of comparable quality to those of z approximate to 6 quasars. The data exhibit a smooth continuum at near-infrared wavelengths that is sharply cut off blueward of 8410 angstrom due to absorption from Ly alpha at redshift z approximate to 5.91, with some flux transmitted through the Lya forest between 7000 and 7800 angstrom. We use column densities inferred from metal absorption lines to constrain the metallicity of the host galaxy between a lower limit of [Si/H] greater than or similar to -1.7 and an upper limit of [S/H] less than or similar to -0.5 set by the non-detection of S II absorption. We demonstrate consistency between the dramatic evolution in the transmission fraction of Ly alpha seen in this spectrum over the redshift range z = 4.9-5.85 with that previously measured from observations of high-redshift quasars. There is an extended redshift interval of Delta z = 0.12 in the Ly alpha forest at z = 5.77 with no detected transmission, leading to a 3 sigma upper limit on the mean Ly alpha transmission fraction of less than or similar to 0.2% (or tau(eff)(GP) (Ly alpha) > 6.4). This is comparable to the lowest-redshift Gunn-Peterson troughs found in quasar spectra. Some Ly beta and Ly gamma transmission is detected in this redshift window, indicating that it is not completely opaque, and hence that the intergalactic medium (IGM) is nonetheless mostly ionized at these redshifts. We set a 2 sigma upper limit of 0.11 on the neutral fraction of the IGM at the redshift of the GRB from the lack of a Ly alpha red damping wing, assuming a model with a constant neutral density. GRB 130606A thus for the first time realizes the promise of GRBs as probes of the first galaxies and cosmic reionization.
C1 [Chornock, Ryan; Berger, Edo; Lunnan, Ragnhild; Drout, Maria R.; Fong, Wen-fai; Laskar, Tanmoy] Harvard Smithsonian Ctr Astrophys, Cambridge, MA 02138 USA.
[Fox, Derek B.] Penn State Univ, Dept Astron & Astrophys, University Pk, PA 16802 USA.
[Roth, Katherine C.] Gemini Observ, Hilo, HI 96720 USA.
RP Chornock, R (reprint author), Harvard Smithsonian Ctr Astrophys, 60 Garden St, Cambridge, MA 02138 USA.
EM rchornock@cfa.harvard.edu
OI Lunnan, Ragnhild/0000-0001-9454-4639
FU National Science Foundation [AST-1107973]; NASA/Swift AO8 grant
[NNX13AJ64G]; NSF on behalf of the Gemini partnership: the National
Science Foundation (United States) [GN-2013A-Q-39]; Science and
Technology Facilities Council (United Kingdom); National Research
Council (Canada); CONICYT (Chile); Australian Research Council
(Australia); Ministerio da Ciencia, Tecnologia e Inovacao (Brazil);
Ministerio de Ciencia, Tecnologia e Innovacion Productiva (Argentina)
FX We thank the Gemini and MMT staffs for their assistance in obtaining
these observations. The Berger GRB group at Harvard is supported by the
National Science Foundation under grant AST-1107973 and by NASA/Swift
AO8 grant NNX13AJ64G. Based in part on observations obtained under
Program ID GN-2013A-Q-39 (PI: Cucchiara) at the Gemini Observatory,
which is operated by the Association of Universities for Research in
Astronomy, Inc., under a cooperative agreement with the NSF on behalf of
the Gemini partnership: the National Science Foundation (United States),
the Science and Technology Facilities Council (United Kingdom), the
National Research Council (Canada), CONICYT (Chile), the Australian
Research Council (Australia), Ministerio da Ciencia, Tecnologia e
Inovacao (Brazil) and Ministerio de Ciencia, Tecnologia e Innovacion
Productiva (Argentina). Some observations reported here were obtained at
the MMT Observatory, a joint facility of the Smithsonian Institution and
the University of Arizona.
NR 67
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PI BRISTOL
PA TEMPLE CIRCUS, TEMPLE WAY, BRISTOL BS1 6BE, ENGLAND
SN 0004-637X
J9 ASTROPHYS J
JI Astrophys. J.
PD SEP 1
PY 2013
VL 774
IS 1
AR 26
DI 10.1088/0004-637X/774/1/26
PG 10
WC Astronomy & Astrophysics
SC Astronomy & Astrophysics
GA 205FA
UT WOS:000323426700026
ER
PT J
AU Drout, MR
Soderberg, AM
Mazzali, PA
Parrent, JT
Margutti, R
Milisavljevic, D
Sanders, NE
Chornock, R
Foley, RJ
Kirshner, RP
Filippenko, AV
Li, W
Brown, PJ
Cenko, SB
Chakraborti, S
Challis, P
Friedman, A
Ganeshalingam, M
Hicken, M
Jensen, C
Modjaz, M
Perets, HB
Silverman, JM
Wong, DS
AF Drout, M. R.
Soderberg, A. M.
Mazzali, P. A.
Parrent, J. T.
Margutti, R.
Milisavljevic, D.
Sanders, N. E.
Chornock, R.
Foley, R. J.
Kirshner, R. P.
Filippenko, A. V.
Li, W.
Brown, P. J.
Cenko, S. B.
Chakraborti, S.
Challis, P.
Friedman, A.
Ganeshalingam, M.
Hicken, M.
Jensen, C.
Modjaz, M.
Perets, H. B.
Silverman, J. M.
Wong, D. S.
TI THE FAST AND FURIOUS DECAY OF THE PECULIAR TYPE Ic SUPERNOVA 2005ek
SO ASTROPHYSICAL JOURNAL
LA English
DT Article
DE supernovae: general; supernovae: individual (SN2005ek)
ID ACCRETION-INDUCED COLLAPSE; SWIFT ULTRAVIOLET/OPTICAL TELESCOPE;
AUTOMATIC IMAGING TELESCOPE; HELIUM SHELL DETONATIONS; NICKEL-RICH
OUTFLOWS; H-II REGIONS; IA SUPERNOVAE; WHITE-DWARFS; LIGHT CURVES; HOST
GALAXIES
AB We present extensive multi-wavelength observations of the extremely rapidly declining Type Ic supernova (SN Ic), SN 2005ek. Reaching a peak magnitude of MR = -17.3 and decaying by similar to 3 mag in the first 15 days post-maximum, SN 2005ek is among the fastest Type I supernovae observed to date. The spectra of SN 2005ek closely resemble those of normal SN Ic, but with an accelerated evolution. There is evidence for the onset of nebular features at only nine days post-maximum. Spectroscopic modeling reveals an ejecta mass of similar to 0.3 M-circle dot that is dominated by oxygen (similar to 80%), while the pseudo-bolometric light curve is consistent with an explosion powered by similar to 0.03 M-circle dot of radioactive Ni-56. Although previous rapidly evolving events (e. g., SN 1885A, SN 1939B, SN 2002bj, SN 2010X) were hypothesized to be produced by the detonation of a helium shell on a white dwarf, oxygen-dominated ejecta are difficult to reconcile with this proposed mechanism. We find that the properties of SN 2005ek are consistent with either the edge-lit double detonation of a low-mass white dwarf or the iron-core collapse of a massive star, stripped by binary interaction. However, if we assume that the strong spectroscopic similarity of SN 2005ek to other SNe Ic is an indication of a similar progenitor channel, then a white-dwarf progenitor becomes very improbable. SN 2005ek may be one of the lowest mass stripped-envelope core-collapse explosions ever observed. We find that the rate of such rapidly declining Type I events is at least 1%-3% of the normal SN Ia rate.
C1 [Drout, M. R.; Soderberg, A. M.; Margutti, R.; Milisavljevic, D.; Sanders, N. E.; Chornock, R.; Foley, R. J.; Kirshner, R. P.; Chakraborti, S.; Challis, P.; Friedman, A.; Hicken, M.; Jensen, C.] Harvard Smithsonian Ctr Astrophys, Cambridge, MA 02138 USA.
[Mazzali, P. A.] Liverpool John Moores Univ, Astrophys Res Inst, Liverpool CH41 1LD, Merseyside, England.
[Mazzali, P. A.] INAF Osservatorio Astron Padova, I-35122 Padua, Italy.
[Mazzali, P. A.] Max Planck Inst Astrophys, D-85748 Garching, Germany.
[Parrent, J. T.] Dartmouth Coll, Dept Phys & Astron, Wilder Lab 6127, Hanover, NH 03755 USA.
[Parrent, J. T.] Las Cumbres Observ Global Telescope Network, Goleta, CA 93117 USA.
[Filippenko, A. V.; Li, W.; Cenko, S. B.; Ganeshalingam, M.] Univ Calif Berkeley, Dept Astron, Berkeley, CA 94720 USA.
[Brown, P. J.] Texas A&M Univ, Dept Phys & Astron, College Stn, TX 77843 USA.
[Friedman, A.] MIT, Ctr Theoret Phys, Cambridge, MA 02139 USA.
[Modjaz, M.] NYU, Dept Phys, Ctr Cosmol & Particle Phys, New York, NY 10003 USA.
[Perets, H. B.] Technion Israel Inst Technol, Dept Phys, IL-32000 Haifa, Israel.
[Silverman, J. M.] Univ Texas Austin, Dept Astron, Austin, TX 78712 USA.
[Wong, D. S.] Univ Alberta, Dept Phys, Edmonton, AB T6G 2E1, Canada.
RP Drout, MR (reprint author), Harvard Smithsonian Ctr Astrophys, 60 Garden St, Cambridge, MA 02138 USA.
EM mdrout@cfa.harvard.edu
RI Friedman, Andrew/I-4691-2013; Perets, Hagai/K-9605-2015
OI Friedman, Andrew/0000-0003-1334-039X; Perets, Hagai/0000-0002-5004-199X
FU NSF; David and Lucile Packard Foundation Fellowship for Science and
Engineering; NSF Astronomy and Astrophysics Postdoctoral Fellowship
[AST-1302771]; U.S. National Science Foundation (NSF) [SES 1056580];
National Science Foundation [PHYS-1066293, NSF PHY11-25915]; W. M. Keck
Foundation; Harvard University Milton Fund
FX M. R. D. is supported in part by the NSF through a Graduate Research
Fellowship. Support for this work was provided by the David and Lucile
Packard Foundation Fellowship for Science and Engineering awarded to A.
M. S. J.M.S. is supported by an NSF Astronomy and Astrophysics
Postdoctoral Fellowship under award AST-1302771. A. S. F. acknowledges
support from the U.S. National Science Foundation (NSF) under grant SES
1056580.; This work was supported in part by the National Science
Foundation under grant No. PHYS-1066293 and the hospitality of the Aspen
Center for Physics. We also acknowledge the hospitality of the Kavli
Institute for Theoretical Physics and partial support by the National
Science Foundation under grant No. NSF PHY11-25915.; The W. M. Keck
Observatory, which is operated as a scientific partnership among the
California Institute of Technology, the University of California, and
NASA; the observatory was made possible by the generous financial
support of the W. M. Keck Foundation. Observations reported here were
obtained at the MMT Observatory, a joint facility of the Smithsonian
Institution and the University of Arizona. The Hobby-Eberly Telescope
(HET), is a joint project of the University of Texas at Austin, the
Pennsylvania State University, Stanford University,
Ludwig-Maximilians-Universitat Munchen, and Georg-August-Universitat
Gottingen. The HET is named in honor of its principal benefactors,
William P. Hobby and Robert E. Eberly. The Very Large Array is a
facility of the National Science Foundation operated under cooperative
agreement by Associated Universities, Inc. PAIRITEL is operated by the
Smithsonian Astrophysical Observatory (SAO) and was made possible by a
grant from the Harvard University Milton Fund, the camera loan from the
University of Virginia, and the continued support of the SAO and UC
Berkeley. We thank M. Skrutskie for his continued support of the
PAIRITEL project.; The supernova research of A.V.F.'s group at UC
Berkeley is supported by Gary & Cynthia Bengier, the Richard & Rhoda
Goldman Fund, the Christopher R. Redlich Fund, the TABASGO Foundation,
and NSF grant AST-1211916. KAIT and its ongoing work were made possible
by donations from Sun Microsystems, Inc., the Hewlett-Packard Company,
AutoScope Corporation, Lick Observatory, the NSF, the University of
California, the Sylvia & Jim Katzman Foundation, and the TABASGO
Foundation.
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PA TEMPLE CIRCUS, TEMPLE WAY, BRISTOL BS1 6BE, ENGLAND
SN 0004-637X
J9 ASTROPHYS J
JI Astrophys. J.
PD SEP 1
PY 2013
VL 774
IS 1
AR 58
DI 10.1088/0004-637X/774/1/58
PG 18
WC Astronomy & Astrophysics
SC Astronomy & Astrophysics
GA 205FA
UT WOS:000323426700058
ER
PT J
AU Hainline, LJ
Morgan, CW
MacLeod, CL
Landaal, ZD
Kochanek, CS
Harris, HC
Tilleman, T
Goicoechea, LJ
Shalyapin, VN
Falco, EE
AF Hainline, Laura J.
Morgan, Christopher W.
MacLeod, Chelsea L.
Landaal, Zachary D.
Kochanek, C. S.
Harris, Hugh C.
Tilleman, Trudy
Goicoechea, L. J.
Shalyapin, V. N.
Falco, Emilio E.
TI TIME DELAY AND ACCRETION DISK SIZE MEASUREMENTS IN THE LENSED QUASAR SBS
0909+532 FROM MULTIWAVELENGTH MICROLENSING ANALYSIS
SO ASTROPHYSICAL JOURNAL
LA English
DT Article
DE accretion, accretion disks; gravitational lensing: micro; gravitational
lensing: strong; quasars: individual (SBS 0909+532)
ID DARK-MATTER HALOS; GRAVITATIONAL LENS; X-RAY; EMISSION REGIONS; LIGHT
CURVES; GALAXY; DECONVOLUTION; VARIABILITY; SYSTEMS; SAMPLE
AB We present three complete seasons and two half-seasons of Sloan Digital Sky Survey (SDSS) r-band photometry of the gravitationally lensed quasar SBS 0909+532 from the U. S. Naval Observatory, as well as two seasons each of SDSS g-band and r-band monitoring from the Liverpool Robotic Telescope. Using Monte Carlo simulations to simultaneously measure the system's time delay and model the r-band microlensing variability, we confirm and significantly refine the precision of the system's time delay to Delta t(AB) = 50(-4)(+2) days, where the stated uncertainties represent the bounds of the formal 1 sigma confidence interval. There may be a conflict between the time delay measurement and a lens consisting of a single galaxy. While models based on the Hubble Space Telescope astrometry and a relatively compact stellar distribution can reproduce the observed delay, the models have somewhat less dark matter than we would typically expect. We also carry out a joint analysis of the microlensing variability in the r and g bands to constrain the size of the quasar's continuum source at these wavelengths, obtaining log{(r(s,r)/cm)[cos i/0.5](1/2)} = 15.3 +/- 0.3 and log{(r(s,g)/cm)[cos i/0.5](1/2)} = 14.8 +/- 0.9, respectively. Our current results do not formally constrain the temperature profile of the accretion disk but are consistent with the expectations of standard thin disk theory.
C1 [Hainline, Laura J.; Morgan, Christopher W.; MacLeod, Chelsea L.; Landaal, Zachary D.] US Naval Acad, Dept Phys, Annapolis, MD 21402 USA.
[Kochanek, C. S.] Ohio State Univ, Dept Astron, Columbus, OH 43210 USA.
[Harris, Hugh C.; Tilleman, Trudy] US Naval Observ, Flagstaff Stn, Flagstaff, AZ 86001 USA.
[Goicoechea, L. J.; Shalyapin, V. N.] Univ Cantabria, Fac Ciencias, E-39005 Santander, Spain.
[Shalyapin, V. N.] Natl Acad Sci Ukraine, Inst Radiophys & Elect, UA-61085 Kharkov, Ukraine.
[Falco, Emilio E.] Harvard Smithsonian Ctr Astrophys, Cambridge, MA 02138 USA.
RP Hainline, LJ (reprint author), US Naval Acad, Dept Phys, 572C Holloway Rd, Annapolis, MD 21402 USA.
EM hainline@usna.edu; cmorgan@usna.edu; macleod@usna.edu; m123894@usna.edu;
ckochanek@astronomy.ohio-state.edu; hch@nofs.navy.mil;
trudy@nofs.navy.mil; goicol@unican.es; vshal@ukr.net;
falco@cfa.harvard.edu
FU National Science Foundation [AST-0907848, AST-1211146, AST-1009756];
Research Corporation for Science Advancement; Chandrasekhar X-Ray Center
[11700501]; UK Science and Technology Facilities Council; Spanish
Department of Science and Innovation [AYA2010-21741-C03-03]; University
of Cantabria
FX This material is based upon work supported by the National Science
Foundation under grant Nos. AST-0907848 and AST-1211146 (to C. W. M.),
and AST-1009756 (to C. S. K.). C.W.M. also gratefully acknowledges
support from the Research Corporation for Science Advancement and
Chandrasekhar X-Ray Center award 11700501. The Liverpool Telescope is
operated on the island of La Palma by Liverpool John Moores University
in the Spanish Observatorio del Roque de los Muchachos of the Instituto
de Astrofisica de Canarias with financial support from the UK Science
and Technology Facilities Council. The Liverpool Quasar Lens Monitoring
(LQLM) program is supported by the Spanish Department of Science and
Innovation grant AYA2010-21741-C03-03 (Gravitational LENses and DArk
MAtter - GLENDAMA project), and the University of Cantabria.
NR 40
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PI BRISTOL
PA TEMPLE CIRCUS, TEMPLE WAY, BRISTOL BS1 6BE, ENGLAND
SN 0004-637X
J9 ASTROPHYS J
JI Astrophys. J.
PD SEP 1
PY 2013
VL 774
IS 1
AR 69
DI 10.1088/0004-637X/774/1/69
PG 11
WC Astronomy & Astrophysics
SC Astronomy & Astrophysics
GA 205FA
UT WOS:000323426700069
ER
PT J
AU Lee, JC
Hwang, HS
Ko, J
AF Lee, Jong Chul
Hwang, Ho Seong
Ko, Jongwan
TI THE CALIBRATION OF STAR FORMATION RATE INDICATORS FOR WISE 22 mu
m-SELECTED GALAXIES IN THE SLOAN DIGITAL SKY SURVEY
SO ASTROPHYSICAL JOURNAL
LA English
DT Article
DE dust, extinction; galaxies: ISM; galaxies: starburst; infrared:
galaxies; stars: formation; surveys
ID ACTIVE GALACTIC NUCLEI; ULTRALUMINOUS INFRARED GALAXIES; H-ALPHA;
FORMING GALAXIES; DUST ATTENUATION; NEARBY GALAXIES; LOCAL UNIVERSE;
DATA RELEASE; TO 3; ULTRAVIOLET
AB We study star formation rate (SFR) indicators for Wide-field Infrared Survey Explorer (WISE) 22 mu m-selected, star-forming galaxies at 0.01 < z < 0.3 in the Sloan Digital Sky Survey. Using extinction-corrected H alpha luminosities and total infrared luminosities as reference SFR estimates, we calibrate WISE mid-infrared- (MIR-) related SFR indicators. Both the 12 and 22 mu m monochromatic luminosities correlate well with the reference the SFR estimates, but tend to underestimate the SFRs of metal-poor galaxies (at lower than solar metallicity), consistent with previous studies. We mitigate this metallicity dependence by using a linear combination of observed H alpha and WISE MIR luminosities for our SFR estimates. This combination provides SFR measurements as robust as those applied to Spitzer data by Kennicutt et al. However, we find that the coefficient a in L-H alpha(obs) + aL(MIR) increases with the SFR, and show that a nonlinear combination of observed Ha and MIR luminosities gives the best SFR estimates with small scatters and with little dependence on physical parameters. Such a combination of H alpha and MIR luminosities for SFR estimates is first applied to the WISE data. Using WISE data, we provide several SFR recipes that are applicable to galaxies with 0.1 less than or similar to SFR (M-circle dot yr(-1)) less than or similar to 100.
C1 [Lee, Jong Chul; Ko, Jongwan] Korea Astron & Space Sci Inst, Taejon 305348, South Korea.
[Hwang, Ho Seong] Smithsonian Astrophys Observ, Cambridge, MA 02138 USA.
RP Lee, JC (reprint author), Korea Astron & Space Sci Inst, Taejon 305348, South Korea.
EM jclee@kasi.re.kr
FU Smithsonian Institution; National Aeronautics and Space Administration;
Alfred P. Sloan Foundation; National Science Foundation; U.S. Department
of Energy; Japanese Monbukagakusho; Max Planck Society; Higher Education
Funding Council for England; American Museum of Natural History;
Astrophysical Institute Potsdam; University of Basel; University of
Cambridge; Case Western Reserve University; University of Chicago;
Drexel University; Fermilab; Institute for Advanced Study; Johns Hopkins
University; Joint Institute for Nuclear Astrophysics; Kavli Institute
for Particle Astrophysics and Cosmology; Chinese Academy of Sciences
(LAMOST); Los Alamos National Laboratory; Max-Planck Institute for
Astronomy (MPIA); Max-Planck-Institute for Astrophysics (MPA); New
Mexico State University; Ohio State University; University of
Pittsburgh; University of Portsmouth; Princeton University; United
States Naval Observatory; University of Washington
FX We are grateful to an anonymous referee for comments that improved the
original manuscript. We thank Hyunjin Shim, Kwang-Il Seon, and Margaret
Geller for useful discussions. J.C.L. and J.K. are members of the
Dedicated Researchers for Extragalactic AstronoMy (DREAM) in Korea
Astronomy and Space Science Institute (KASI). H. S. H. acknowledges the
Smithsonian Institution for the support of his post-doctoral fellowship.
This publication makes use of data products from the Wide-field Infrared
Survey Explorer, which is a joint project of the University of
California, Los Angeles, and the Jet Propulsion Laboratory, California
Institute of Technology, funded by the National Aeronautics and Space
Administration. Funding for the SDSS and SDSS-II has been provided by
the Alfred P. Sloan Foundation, the Participating Institutions, the
National Science Foundation, the U.S. Department of Energy, the National
Aeronautics and Space Administration, the Japanese Monbukagakusho, the
Max Planck Society, and the Higher Education Funding Council for
England. The SDSS Web site is http://www.sdss.org/. The SDSS is managed
by the Astrophysical Research Consortium for the Participating
Institutions. The Participating Institutions are the American Museum of
Natural History, Astrophysical Institute Potsdam, University of Basel,
University of Cambridge, Case Western Reserve University, University of
Chicago, Drexel University, Fermilab, the Institute for Advanced Study,
the Japan Participation Group, Johns Hopkins University, the Joint
Institute for Nuclear Astrophysics, the Kavli Institute for Particle
Astrophysics and Cosmology, the Korean Scientist Group, the Chinese
Academy of Sciences (LAMOST), Los Alamos National Laboratory, the
Max-Planck Institute for Astronomy (MPIA), the Max-Planck-Institute for
Astrophysics (MPA), New Mexico State University, Ohio State University,
University of Pittsburgh, University of Portsmouth, Princeton
University, the United States Naval Observatory, and the University of
Washington.
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PA TEMPLE CIRCUS, TEMPLE WAY, BRISTOL BS1 6BE, ENGLAND
SN 0004-637X
J9 ASTROPHYS J
JI Astrophys. J.
PD SEP 1
PY 2013
VL 774
IS 1
AR 62
DI 10.1088/0004-637X/774/1/62
PG 10
WC Astronomy & Astrophysics
SC Astronomy & Astrophysics
GA 205FA
UT WOS:000323426700062
ER
PT J
AU McDonald, M
Benson, BA
Vikhlinin, A
Stalder, B
Bleem, LE
de Haan, T
Lin, HW
Aird, KA
Ashby, MLN
Bautz, MW
Bayliss, M
Bocquet, S
Brodwin, M
Carlstrom, JE
Chang, CL
Cho, HM
Clocchiatti, A
Crawford, TM
Crites, AT
Desai, S
Dobbs, MA
Dudley, JP
Foley, RJ
Forman, WR
George, EM
Gettings, D
Gladders, MD
Gonzalez, AH
Halverson, NW
High, FW
Holder, GP
Holzapfel, WL
Hoover, S
Hrubes, JD
Jones, C
Joy, M
Keisler, R
Knox, L
Lee, AT
Leitch, EM
Liu, J
Lueker, M
Luong-Van, D
Mantz, A
Marrone, DP
McMahon, JJ
Mehl, J
Meyer, SS
Miller, ED
Mocanu, L
Mohr, JJ
Montroy, TE
Murray, SS
Nurgaliev, D
Padin, S
Plagge, T
Pryke, C
Reichardt, CL
Rest, A
Ruel, J
Ruhl, JE
Saliwanchik, BR
Saro, A
Sayre, JT
Schaffer, KK
Shirokoff, E
Song, J
Suhada, R
Spieler, HG
Stanford, SA
Staniszewski, Z
Stark, AA
Story, K
van Engelen, A
Vanderlinde, K
Vieira, JD
Williamson, R
Zahn, O
Zenteno, A
AF McDonald, M.
Benson, B. A.
Vikhlinin, A.
Stalder, B.
Bleem, L. E.
de Haan, T.
Lin, H. W.
Aird, K. A.
Ashby, M. L. N.
Bautz, M. W.
Bayliss, M.
Bocquet, S.
Brodwin, M.
Carlstrom, J. E.
Chang, C. L.
Cho, H. M.
Clocchiatti, A.
Crawford, T. M.
Crites, A. T.
Desai, S.
Dobbs, M. A.
Dudley, J. P.
Foley, R. J.
Forman, W. R.
George, E. M.
Gettings, D.
Gladders, M. D.
Gonzalez, A. H.
Halverson, N. W.
High, F. W.
Holder, G. P.
Holzapfel, W. L.
Hoover, S.
Hrubes, J. D.
Jones, C.
Joy, M.
Keisler, R.
Knox, L.
Lee, A. T.
Leitch, E. M.
Liu, J.
Lueker, M.
Luong-Van, D.
Mantz, A.
Marrone, D. P.
McMahon, J. J.
Mehl, J.
Meyer, S. S.
Miller, E. D.
Mocanu, L.
Mohr, J. J.
Montroy, T. E.
Murray, S. S.
Nurgaliev, D.
Padin, S.
Plagge, T.
Pryke, C.
Reichardt, C. L.
Rest, A.
Ruel, J.
Ruhl, J. E.
Saliwanchik, B. R.
Saro, A.
Sayre, J. T.
Schaffer, K. K.
Shirokoff, E.
Song, J.
Suhada, R.
Spieler, H. G.
Stanford, S. A.
Staniszewski, Z.
Stark, A. A.
Story, K.
van Engelen, A.
Vanderlinde, K.
Vieira, J. D.
Williamson, R.
Zahn, O.
Zenteno, A.
TI THE GROWTH OF COOL CORES AND EVOLUTION OF COOLING PROPERTIES IN A SAMPLE
OF 83 GALAXY CLUSTERS AT 0.3 < z < 1.2 SELECTED FROM THE SPT-SZ SURVEY
SO ASTROPHYSICAL JOURNAL
LA English
DT Article
DE early universe; galaxies: clusters: general; galaxies: clusters:
intracluster medium; X-rays: galaxies: clusters
ID SOUTH-POLE TELESCOPE; ACTIVE GALACTIC NUCLEI; RAY LUMINOUS CLUSTERS;
COLD MOLECULAR GAS; 720 SQUARE DEGREES; STAR-FORMATION; FLOW CLUSTERS;
HIGH-REDSHIFT; INTRACLUSTER MEDIUM; PERSEUS CLUSTER
AB We present first results on the cooling properties derived from Chandra X-ray observations of 83 high-redshift (0.3 < z < 1.2) massive galaxy clusters selected by their Sunyaev-Zel'dovich signature in the South Pole Telescope data. We measure each cluster's central cooling time, central entropy, and mass deposition rate, and compare these properties to those for local cluster samples. We find no significant evolution from z similar to 0 to z similar to 1 in the distribution of these properties, suggesting that cooling in cluster cores is stable over long periods of time. We also find that the average cool core entropy profile in the inner similar to 100 kpc has not changed dramatically since z similar to 1, implying that feedback must be providing nearly constant energy injection to maintain the observed "entropy floor" at similar to 10 keV cm(2). While the cooling properties appear roughly constant over long periods of time, we observe strong evolution in the gas density profile, with the normalized central density (rho(g),(0)/rho(crit)) increasing by an order of magnitude from z similar to 1 to z similar to 0. When using metrics defined by the inner surface brightness profile of clusters, we find an apparent lack of classical, cuspy, cool-core clusters at z > 0.75, consistent with earlier reports for clusters at z > 0.5 using similar definitions. Our measurements indicate that cool cores have been steadily growing over the 8 Gyr spanned by our sample, consistent with a constant, similar to 150M(circle dot) yr(-1) cooling flow that is unable to cool below entropies of 10 keV cm(2) and, instead, accumulates in the cluster center. We estimate that cool cores began to
C1 [McDonald, M.; Bautz, M. W.; Miller, E. D.] MIT, Kavli Inst Astrophys & Space Res, Cambridge, MA 02139 USA.
[Benson, B. A.; Bleem, L. E.; Carlstrom, J. E.; Chang, C. L.; Crawford, T. M.; Crites, A. T.; Gladders, M. D.; High, F. W.; Hoover, S.; Keisler, R.; Leitch, E. M.; Mantz, A.; Mehl, J.; Meyer, S. S.; Mocanu, L.; Padin, S.; Plagge, T.; Schaffer, K. K.; Story, K.; Vieira, J. D.; Williamson, R.] Univ Chicago, Kavli Inst Cosmol Phys, Chicago, IL 60637 USA.
[Benson, B. A.; Carlstrom, J. E.; Chang, C. L.; Hoover, S.; Meyer, S. S.; Schaffer, K. K.] Univ Chicago, Enrico Fermi Inst, Chicago, IL 60637 USA.
[Vikhlinin, A.; Stalder, B.; Ashby, M. L. N.; Bayliss, M.; Foley, R. J.; Forman, W. R.; Jones, C.; Murray, S. S.; Stark, A. A.] Harvard Smithsonian Ctr Astrophys, Cambridge, MA 02138 USA.
[Bleem, L. E.; Carlstrom, J. E.; Keisler, R.; Meyer, S. S.; Story, K.; Vieira, J. D.] Univ Chicago, Dept Phys, Chicago, IL 60637 USA.
[de Haan, T.; Dobbs, M. A.; Dudley, J. P.; Holder, G. P.; van Engelen, A.] McGill Univ, Dept Phys, Montreal, PQ H3A 2T8, Canada.
[Lin, H. W.] Caddo Parish Magnet High Sch, Shrevport, LA 71101 USA.
[Aird, K. A.; Hrubes, J. D.; Luong-Van, D.] Univ Chicago, Chicago, IL 60637 USA.
[Bayliss, M.; Nurgaliev, D.; Ruel, J.] Harvard Univ, Dept Phys, Cambridge, MA 02138 USA.
[Bocquet, S.; Desai, S.; Liu, J.; Mohr, J. J.; Saro, A.; Suhada, R.; Zenteno, A.] Univ Munich, Dept Phys, D-81679 Munich, Germany.
[Bocquet, S.; Desai, S.; Liu, J.; Mohr, J. J.; Zenteno, A.] Excellence Cluster Univ, D-85748 Garching, Germany.
[Brodwin, M.] Univ Missouri, Dept Phys & Astron, Kansas City, MO 64110 USA.
[Carlstrom, J. E.; Crawford, T. M.; Crites, A. T.; Gladders, M. D.; High, F. W.; Leitch, E. M.; Mehl, J.; Meyer, S. S.; Mocanu, L.; Padin, S.; Plagge, T.; Williamson, R.] Univ Chicago, Dept Astron & Astrophys, Chicago, IL 60637 USA.
[Carlstrom, J. E.; Chang, C. L.; Mehl, J.] Argonne Natl Lab, Argonne, IL 60439 USA.
[Cho, H. M.] NIST Quantum Devices Grp, Boulder, CO 80305 USA.
[Clocchiatti, A.] Pontificia Univ Catolica, Dept Astron & Astrosif, Santiago, Chile.
[George, E. M.; Holzapfel, W. L.; Lee, A. T.; Lueker, M.; Reichardt, C. L.; Shirokoff, E.; Zahn, O.] Univ Calif Berkeley, Dept Phys, Berkeley, CA 94720 USA.
[Gettings, D.; Gonzalez, A. H.] Univ Florida, Dept Astron, Gainesville, FL 32611 USA.
[Halverson, N. W.] Univ Colorado, Dept Astrophys & Planetary Sci, Boulder, CO 80309 USA.
[Halverson, N. W.] Univ Colorado, Dept Phys, Boulder, CO 80309 USA.
[Joy, M.] NASA, George C Marshall Space Flight Ctr, Dept Space Sci, Huntsville, AL 35812 USA.
[Knox, L.; Stanford, S. A.] Univ Calif Davis, Dept Phys, Davis, CA 95616 USA.
[Lee, A. T.; Spieler, H. G.] Univ Calif Berkeley, Lawrence Berkeley Natl Lab, Div Phys, Berkeley, CA 94720 USA.
[Lueker, M.; Padin, S.; Shirokoff, E.; Vieira, J. D.] CALTECH, Pasadena, CA 91125 USA.
[Marrone, D. P.] Univ Arizona, Steward Observ, Tucson, AZ 85721 USA.
[McMahon, J. J.; Song, J.] Univ Michigan, Dept Phys, Ann Arbor, MI 48109 USA.
[Mohr, J. J.] Max Planck Inst Extraterr Phys, D-85748 Garching, Germany.
[Montroy, T. E.; Ruhl, J. E.; Saliwanchik, B. R.; Sayre, J. T.; Staniszewski, Z.] Case Western Reserve Univ, Dept Phys, Ctr Educ & Res Cosmol & Astrophys, Cleveland, OH 44106 USA.
[Pryke, C.] Univ Minnesota, Dept Phys, Minneapolis, MN 55455 USA.
[Rest, A.] Space Telescope Sci Inst, Baltimore, MD 21218 USA.
[Schaffer, K. K.] Sch Art Inst Chicago, Liberal Arts Dept, Chicago, IL 60603 USA.
[Stanford, S. A.] Lawrence Livermore Natl Lab, Inst Geophys & Planetary Phys, Livermore, CA 94551 USA.
[Vanderlinde, K.] Univ Toronto, Dunlap Inst Astron & Astrophys, Toronto, ON M5S 3H4, Canada.
[Vanderlinde, K.] Univ Toronto, Dept Astron & Astrophys, Toronto, ON M5S 3H4, Canada.
[Zahn, O.] Univ Calif Berkeley, Dept Phys, Berkeley Ctr Cosmol Phys, Berkeley, CA 94720 USA.
[Zahn, O.] Univ Calif Berkeley, Lawrence Berkeley Natl Lab, Berkeley, CA 94720 USA.
RP McDonald, M (reprint author), MIT, Kavli Inst Astrophys & Space Res, 77 Massachusetts Ave, Cambridge, MA 02139 USA.
EM mcdonald@space.mit.edu
RI Williamson, Ross/H-1734-2015; Holzapfel, William/I-4836-2015;
OI Williamson, Ross/0000-0002-6945-2975; Aird, Kenneth/0000-0003-1441-9518;
Reichardt, Christian/0000-0003-2226-9169; Lin, Henry/0000-0003-2767-6142
FU NASA [HST-HF51308.01-A, 12800071, 12800088, 13800883]; Space Telescope
Science Institute; Association of Universities for Research in
Astronomy, Inc., for NASA [NAS 5-26555]; National Science Foundation
[ANT-0638937]; NSF Physics Frontier Center [PHY-0114422]; Kavli
Foundation; Gordon and Betty Moore Foundation; NSF [AST-1009012,
AST-1009649, MRI-0723073]; U.S. Department of Energy [DE-AC02-06CH11357]
FX M.M. acknowledges support by NASA through a Hubble Fellowship grant
HST-HF51308.01-A awarded by the Space Telescope Science Institute, which
is operated by the Association of Universities for Research in
Astronomy, Inc., for NASA, under contract NAS 5-26555. The South Pole
Telescope program is supported by the National Science Foundation
through grant ANT-0638937. Partial support is also provided by the NSF
Physics Frontier Center grant PHY-0114422 to the Kavli Institute of
Cosmological Physics at the University of Chicago, the Kavli Foundation,
and the Gordon and Betty Moore Foundation. Support for X-ray analysis
was provided by NASA through Chandra Award Nos. 12800071, 12800088, and
13800883 issued by the Chandra X-Ray Observatory Center, which is
operated by the Smithsonian Astrophysical Observatory for and on behalf
of NASA. Galaxy cluster research at Harvard is supported by NSF grant
AST-1009012 and at SAO in part by NSF grants AST-1009649 and
MRI-0723073. Argonne National Laboratory's work was supported under U.S.
Department of Energy contract DE-AC02-06CH11357.
NR 95
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PI BRISTOL
PA TEMPLE CIRCUS, TEMPLE WAY, BRISTOL BS1 6BE, ENGLAND
SN 0004-637X
EI 1538-4357
J9 ASTROPHYS J
JI Astrophys. J.
PD SEP 1
PY 2013
VL 774
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AR UNSP 23
DI 10.1088/0004-637X/774/1/23
PG 23
WC Astronomy & Astrophysics
SC Astronomy & Astrophysics
GA 205FA
UT WOS:000323426700023
ER
PT J
AU Ricarte, A
Moldvai, N
Hughes, AM
Duchene, G
Williams, JP
Andrews, SM
Wilner, DJ
AF Ricarte, Angelo
Moldvai, Noel
Hughes, A. Meredith
Duchene, Gaspard
Williams, Jonathan P.
Andrews, Sean M.
Wilner, David J.
TI RESOLVING THE MOTH AT MILLIMETER WAVELENGTHS
SO ASTROPHYSICAL JOURNAL
LA English
DT Article
DE circumstellar matter; stars: individual (HD 61005); submillimeter:
planetary systems
ID SUN-LIKE STARS; DEBRIS DISK; PROTOPLANETARY DISKS; INTERSTELLAR-MEDIUM;
BETA-PICTORIS; HR 8799; CIRCUMSTELLAR DISK; RADIATIVE-TRANSFER; AU
MICROSCOPII; OPTICAL-IMAGES
AB HD 61005, also known as "The Moth," is one of only a handful of debris disks that exhibit swept-back "wings" thought to be caused by interaction with the ambient interstellar medium (ISM). We present 1.3 mm Submillimeter Array observations of the debris disk around HD 61005 at a spatial resolution of 1.'' 9 that resolve the emission from large grains for the first time. The disk exhibits a double-peaked morphology at millimeter wavelengths, consistent with an optically thin ring viewed close to edge-on. To investigate the disk structure and the properties of the dust grains we simultaneously model the spatially resolved 1.3 mm visibilities and the unresolved spectral energy distribution (SED). The temperatures indicated by the SED are consistent with expected temperatures for grains close to the blowout size located at radii commensurate with the millimeter and scattered light data. We also perform a visibility-domain analysis of the spatial distribution of millimeter-wavelength flux, incorporating constraints on the disk geometry from scattered light imaging, and find suggestive evidence of wavelength-dependent structure. The millimeter-wavelength emission apparently originates predominantly from the thin ring component rather than tracing the "wings" observed in scattered light. The implied segregation of large dust grains in the ring is consistent with an ISM-driven origin for the scattered light wings.
C1 [Ricarte, Angelo; Moldvai, Noel; Hughes, A. Meredith; Duchene, Gaspard] Univ Calif Berkeley, Dept Astron, Berkeley, CA 94720 USA.
[Hughes, A. Meredith] Wesleyan Univ, Dept Astron, Van Vleck Observ, Middletown, CT 06457 USA.
[Duchene, Gaspard] UJF Grenoble 1, CNRS, INSU, Inst Planetol & Astrophys Grenoble IPAG,UMR 5274, F-38041 Grenoble 9, France.
[Williams, Jonathan P.] Univ Hawaii, Inst Astron, Honolulu, HI 96822 USA.
[Andrews, Sean M.; Wilner, David J.] Harvard Smithsonian Ctr Astrophys, Cambridge, MA 02138 USA.
RP Ricarte, A (reprint author), Univ Calif Berkeley, Dept Astron, 601 Campbell Hall, Berkeley, CA 94720 USA.
OI Williams, Jonathan/0000-0001-5058-695X
FU Miller Institute for Basic Research in Science
FX We thank Holly Maness, who obtained the early data sets used in this
paper and established detection. We are also grateful to Esther Buenzli
for kindly providing her LOCI image used in Figure 1. A.M.H. is
supported by a fellowship from the Miller Institute for Basic Research
in Science.
NR 47
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PI BRISTOL
PA TEMPLE CIRCUS, TEMPLE WAY, BRISTOL BS1 6BE, ENGLAND
SN 0004-637X
J9 ASTROPHYS J
JI Astrophys. J.
PD SEP 1
PY 2013
VL 774
IS 1
AR 80
DI 10.1088/0004-637X/774/1/80
PG 9
WC Astronomy & Astrophysics
SC Astronomy & Astrophysics
GA 205FA
UT WOS:000323426700080
ER
PT J
AU Rosenfeld, KA
Andrews, SM
Hughes, AM
Wilner, DJ
Qi, CH
AF Rosenfeld, Katherine A.
Andrews, Sean M.
Hughes, A. Meredith
Wilner, David J.
Qi, Chunhua
TI A SPATIALLY RESOLVED VERTICAL TEMPERATURE GRADIENT IN THE HD 163296 DISK
SO ASTROPHYSICAL JOURNAL
LA English
DT Article
DE circumstellar matter; protoplanetary disks; stars: individual (HD
163296); submillimeter: general
ID HERBIG-AE STAR; MAIN-SEQUENCE STARS; T-TAURI STARS; PROTOPLANETARY
DISKS; ACCRETION DISKS; CIRCUMSTELLAR DISKS; YOUNG OBJECTS; SOLAR
NEBULA; DM-TAU; THERMAL STRUCTURE
AB We analyze sensitive, sub-arcsecond resolution ALMA science verification observations of CO emission lines in the protoplanetary disk hosted by the young, isolated Ae star HD 163296. The observed spatial morphology of the (CO)-C-12 J = 3-2 emission line is asymmetric across the major axis of the disk; the (CO)-C-12 J = 2-1 line features a much less pronounced, but similar, asymmetry. The J = 2-1 emission from (CO)-C-12 and its main isotopologues have no resolved spatial asymmetry. We associate this behavior with the direct signature of a vertical temperature gradient and layered molecular structure in the disk. This is demonstrated using both toy models and more sophisticated calculations assuming non-local thermodynamic equilibrium conditions. A model disk structure is developed to reproduce both the distinctive spatial morphology of the (CO)-C-12 J = 3-2 line as well as the J = 2-1 emission from the CO isotopologues assuming relative abundances consistent with the interstellar medium. This model disk structure has tau = 1 emitting surfaces for the (CO)-C-12 emission lines that make an angle of similar to 15 degrees with respect to the disk midplane. Furthermore, we show that the spatial and spectral sensitivity of these data can distinguish between models that have sub-Keplerian gas velocities due to the vertical extent of the disk and its associated radial pressure gradient (a fractional difference in the bulk gas velocity field of greater than or similar to 5%).
C1 [Rosenfeld, Katherine A.; Andrews, Sean M.; Wilner, David J.; Qi, Chunhua] Harvard Smithsonian Ctr Astrophys, Cambridge, MA 02138 USA.
[Hughes, A. Meredith] Wesleyan Univ, Dept Astron, Van Vleck Observ, Middletown, CT 06459 USA.
RP Rosenfeld, KA (reprint author), Harvard Smithsonian Ctr Astrophys, 60 Garden St, Cambridge, MA 02138 USA.
FU NASA Origins of Solar Systems grant [NNX11AK63]
FX We are grateful to Matt Payne, Diego Munoz, Eugene Chiang, David
Knezevic, Moritz Gunther, Marc Metchnik, and Kees Dullemond for
insightful conversations. This paper makes use of the following ALMA
data: ADS/JAO.ALMA#2011.0.00010. SV. ALMA is a partnership of ESO
(representing its member states), NSF (USA), and NINS (Japan), together
with NRC (Canada) and NSC and ASIAA (Taiwan), in cooperation with the
Republic of Chile. The Joint ALMA Observatory is operated by ESO,
AUI/NRAO and NAOJ. We acknowledge support from NASA Origins of Solar
Systems grant No. NNX11AK63.
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PA TEMPLE CIRCUS, TEMPLE WAY, BRISTOL BS1 6BE, ENGLAND
SN 0004-637X
J9 ASTROPHYS J
JI Astrophys. J.
PD SEP 1
PY 2013
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DI 10.1088/0004-637X/774/1/16
PG 16
WC Astronomy & Astrophysics
SC Astronomy & Astrophysics
GA 205FA
UT WOS:000323426700016
ER
PT J
AU Sanchis-Ojeda, R
Rappaport, S
Winn, JN
Levine, A
Kotson, MC
Latham, DW
Buchhave, LA
AF Sanchis-Ojeda, Roberto
Rappaport, Saul
Winn, Joshua N.
Levine, Alan
Kotson, Michael C.
Latham, David W.
Buchhave, Lars A.
TI TRANSITS AND OCCULTATIONS OF AN EARTH-SIZED PLANET IN AN 8.5 hr ORBIT
SO ASTROPHYSICAL JOURNAL
LA English
DT Article
DE planetary systems; planets and satellites: atmospheres; planets and
satellites: detection
ID ERROR-CORRECTION; HOT JUPITERS; LIGHT CURVES; KEPLER; STAR; EXOPLANET;
CANDIDATES; DISCOVERY; DENSITIES; PERIODS
AB We report the discovery of an Earth-sized planet (1.16 +/- 0.19 R-circle plus) in an 8.5 hr orbit around a late G-type star (KIC 8435766, Kepler-xx). The object was identified in a search for short-period planets in the Kepler database and confirmed to be a transiting planet (as opposed to an eclipsing stellar system) through the absence of ellipsoidal light variations or substantial radial-velocity variations. The unusually short orbital period and the relative brightness of the host star (m(Kep) = 11.5) enable robust detections of the changing illumination of the visible hemisphere of the planet, as well as the occultations of the planet by the star. We interpret these signals as representing a combination of reflected and reprocessed light, with the highest planet dayside temperature in the range of 2300 K-3100 K. Follow-up spectroscopy combined with finer sampling photometric observations will further pin down the system parameters and may even yield the mass of the planet.
C1 [Sanchis-Ojeda, Roberto; Rappaport, Saul; Winn, Joshua N.] MIT, Dept Phys, Cambridge, MA 02139 USA.
[Sanchis-Ojeda, Roberto; Rappaport, Saul; Winn, Joshua N.; Levine, Alan] MIT, Kavli Inst Astrophys & Space Res, Cambridge, MA 02139 USA.
[Kotson, Michael C.] Univ Hawaii, Inst Astron, Honolulu, HI 96822 USA.
[Latham, David W.] Harvard Smithsonian Ctr Astrophys, Cambridge, MA 02138 USA.
[Buchhave, Lars A.] Univ Copenhagen, Niels Bohr Inst, DK-2100 Copenhagen, Denmark.
[Buchhave, Lars A.] Univ Copenhagen, Nat Hist Museum Denmark, Ctr Star & Planet Format, DK-1350 Copenhagen, Denmark.
RP Sanchis-Ojeda, R (reprint author), MIT, Dept Phys, Cambridge, MA 02139 USA.
EM rsanchis86@gmail.com; sar@mit.edu; jwinn@mit.edu; aml@space.mit.edu
OI Buchhave, Lars A./0000-0003-1605-5666
FU NASA [NAS5-26555]; Kepler mission under NASA [NNX13AB58A]; Smithsonian
Astrophysical Observatory; National Aeronautics and Space Administration
under the Exoplanet Exploration Program; NASA Office of Space Science
[NNX09AF08G]
FX We are indebted to Allyson Bieryla and Gilbert Esquerdo for their
assistance with the spectroscopic follow-up observations. We also thank
the referee, Nick Cowan, for a thorough critique of the manuscript. We
thank Bryce Croll, Brice Demory, Amaury Triaud and Kevin Schlaufman for
helpful discussions about this object, and of course we are grateful to
the entire Kepler team for providing a wonderful tool for discovery.
R.S.O. and J.N.W. acknowledge NASA support through the Kepler
Participating Scientist Program. D. W. L. acknowledges partial support
for the spectroscopic work from the Kepler mission under NASA
Cooperative Agreement NNX13AB58A with the Smithsonian Astrophysical
Observatory. This research has made use of the NASA Exoplanet Archive,
which is operated by the California Institute of Technology, under
contract with the National Aeronautics and Space Administration under
the Exoplanet Exploration Program. The data presented in this article
were obtained from the Mikulski Archive for Space Telescopes (MAST).
STScI is operated by the Association of Universities for Research in
Astronomy, Inc., under NASA contract NAS5-26555. Support for MAST for
non-Hubble Space Telescope data is provided by the NASA Office of Space
Science via grant NNX09AF08G and by other grants and contracts.
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PA TEMPLE CIRCUS, TEMPLE WAY, BRISTOL BS1 6BE, ENGLAND
SN 0004-637X
J9 ASTROPHYS J
JI Astrophys. J.
PD SEP 1
PY 2013
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DI 10.1088/0004-637X/774/1/54
PG 9
WC Astronomy & Astrophysics
SC Astronomy & Astrophysics
GA 205FA
UT WOS:000323426700054
ER
PT J
AU Takahashi, S
Ohashi, N
Bourke, TL
AF Takahashi, Satoko
Ohashi, Nagayoshi
Bourke, Tyler L.
TI DIRECT IMAGING OF A COMPACT MOLECULAR OUTFLOW FROM A VERY LOW LUMINOSITY
OBJECT: L1521F-IRS
SO ASTROPHYSICAL JOURNAL
LA English
DT Article
DE ISM: clouds; ISM: individual objects (L1521F-IRS); ISM: jets and
outflows; ISM: molecules; stars: formation; stars: low-mass; stars:
protostars
ID 1ST HYDROSTATIC CORE; EVOLVED STARLESS CORE; SPITZER C2D SURVEY; CLOUD
CORE; DENSE CORE; SUBMILLIMETER ARRAY; STELLAR DENSITIES; HIGH-VELOCITY;
PROTOSTELLAR JET; FORMING REGION
AB Studying the physical conditions of very low luminosity objects (VeLLOs; L-bol < 0.1 L-circle dot) is important for understanding the earliest evolutionary stage of protostars and brown dwarfs. We report interferometric observations of the VeLLO L1521F-IRS, in (CO)-C-12 (2-1) line emission and the 1.3 mm continuum emission, using the Submillimeter Array. With the (CO)-C-12 (2-1) high-resolution observations, we have spatially resolved a compact but poorly collimated molecular outflow associated with L1521F-IRS for the first time. The blueshifted and redshifted lobes are aligned along the east and west side of L1521F-IRS with a lobe size of approximate to 1000 AU. The estimated outflow mass, maximum outflow velocity, and outflow force are (9.0-80) x 10(-4) M-circle dot, 7.2 km s(-1), and (7.4-66) x 10(-7) M-circle dot km s(-1) yr(-1), respectively. The estimated outflow parameters such as size, mass, and momentum rate are similar to values derived for other VeLLOs, and are located at the lower end of values compared to previously studied outflows associated with low- to high-mass star-forming regions. Low-velocity less collimated (1.5 km s(-1)/1200 AU) and higher-velocity compact (4.0 km s(-1)/920 AU) outflow components are suggested by the data. These velocity structures are not consistent with those expected in the jet-driven or wind-driven outflow models, perhaps suggesting a remnant outflow from the first hydrostatic core as well as an undeveloped outflow from the protostar. Detection of an infrared source and compact millimeter continuum emission suggests the presence of the protostar, while its low bolometric luminosity (0.034-0.07 L-circle dot) and small outflow suggests that L1521F is in the earliest protostellar stage (< 10(4) yr) and contains a substellar mass object. The bolometric (or internal) luminosity of L1521F-IRS suggests that the current mass accretion rate is an order of magnitude lower than expected in the standard mass accretion model (approximate to 10(-6) M-circle dot yr(-1)), which may imply that L1521F-IRS is currently in a low activity phase.
C1 [Takahashi, Satoko] Joint ALMA Observ, Santiago, Chile.
[Takahashi, Satoko] Natl Astron Observ Japan, Mitaka, Tokyo 1818588, Japan.
[Takahashi, Satoko; Ohashi, Nagayoshi] Acad Sinica, Inst Astron & Astrophys, Taipei 10617, Taiwan.
[Ohashi, Nagayoshi] Natl Astron Observ Japan, Subaru Telescope, Hilo, HI 96720 USA.
[Bourke, Tyler L.] Harvard Smithsonian Ctr Astrophys, Cambridge, MA 02138 USA.
RP Takahashi, S (reprint author), Joint ALMA Observ, Alonso de Cordova 3107, Santiago, Chile.
EM satoko.takahashi@nao.ac.jp
FU Institute of Astronomy and Astrophysics, Academia Sinica, Taiwan
FX We acknowledge the staff at the Submillimeter Array for assistance with
operations. The SMT is operated by the Arizona Radio Observatory (ARO),
Steward Observatory, University of Arizona. S.T. acknowledges S.-W. Yen
for helping the SMT 12CO (2-1) data inspection, and M.
Machida and N. Hirano, and Y.-N. Su for fruitful scientific comments. We
also thank our referee for the constructive comments that helped to
improve this manuscript. S.T. is financially supported by a postdoctoral
fellowship at the Institute of Astronomy and Astrophysics, Academia
Sinica, Taiwan.
NR 66
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PA TEMPLE CIRCUS, TEMPLE WAY, BRISTOL BS1 6BE, ENGLAND
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EI 1538-4357
J9 ASTROPHYS J
JI Astrophys. J.
PD SEP 1
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AR 20
DI 10.1088/0004-637X/774/1/20
PG 13
WC Astronomy & Astrophysics
SC Astronomy & Astrophysics
GA 205FA
UT WOS:000323426700020
ER
PT J
AU Deck, KM
Holman, MJ
Agol, E
Carter, JA
Lissauer, JJ
Ragozzine, D
Winn, JN
AF Deck, Katherine M.
Holman, Matthew J.
Agol, Eric
Carter, Joshua A.
Lissauer, Jack J.
Ragozzine, Darin
Winn, Joshua N.
TI RAPID DYNAMICAL CHAOS IN AN EXOPLANETARY SYSTEM (vol 755, pg L21, 2012)
SO ASTROPHYSICAL JOURNAL LETTERS
LA English
DT Correction
C1 [Deck, Katherine M.; Winn, Joshua N.] MIT, Dept Phys, Cambridge, MA 02139 USA.
[Deck, Katherine M.; Winn, Joshua N.] MIT, Kavli Inst Astrophys & Space Res, Cambridge, MA 02139 USA.
[Holman, Matthew J.; Carter, Joshua A.; Ragozzine, Darin] Harvard Smithsonian Ctr Astrophys, Cambridge, MA 02138 USA.
[Agol, Eric] Univ Washington, Dept Astron, Seattle, WA 98195 USA.
[Lissauer, Jack J.] NASA, Ames Res Ctr, Moffett Field, CA 94035 USA.
RP Deck, KM (reprint author), MIT, Dept Phys, 77 Massachusetts Ave, Cambridge, MA 02139 USA.
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PA TEMPLE CIRCUS, TEMPLE WAY, BRISTOL BS1 6BE, ENGLAND
SN 2041-8205
J9 ASTROPHYS J LETT
JI Astrophys. J. Lett.
PD SEP 1
PY 2013
VL 774
IS 1
AR L15
DI 10.1088/2041-8205/774/1/L15
PG 3
WC Astronomy & Astrophysics
SC Astronomy & Astrophysics
GA 208IV
UT WOS:000323672400015
ER
PT J
AU Thacker, RW
Hill, AL
Hill, MS
Redmond, NE
Collins, AG
Morrow, CC
Spicer, L
Carmack, CA
Zappe, ME
Pohlmann, D
Hall, C
Diaz, MC
Bangalore, PV
AF Thacker, Robert W.
Hill, April L.
Hill, Malcolm S.
Redmond, Niamh E.
Collins, Allen G.
Morrow, Christine C.
Spicer, Lori
Carmack, Cheryl A.
Zappe, Megan E.
Pohlmann, Deborah
Hall, Chelsea
Diaz, Maria C.
Bangalore, Purushotham V.
TI Nearly Complete 28S rRNA Gene Sequences Confirm New Hypotheses of Sponge
Evolution
SO INTEGRATIVE AND COMPARATIVE BIOLOGY
LA English
DT Article; Proceedings Paper
CT Symposium on Assembling the Poriferan Tree of Life at the Annual Meeting
of the Society-for-Integrative-and-Comparative-Biology (SICB)
CY JAN 03-07, 2013
CL San Francisco, CA
SP Soc Integrat & Comparat Biol (SICB)
ID CLASS DEMOSPONGIAE; PHYLOGENY; PORIFERA; SYSTEMATICS; SUPPORT; PHYLUM;
RDNA
AB The highly collaborative research sponsored by the NSF-funded Assembling the Porifera Tree of Life (PorToL) project is providing insights into some of the most difficult questions in metazoan systematics. Our understanding of phylogenetic relationships within the phylum Porifera has changed considerably with increased taxon sampling and data from additional molecular markers. PorToL researchers have falsified earlier phylogenetic hypotheses, discovered novel phylogenetic alliances, found phylogenetic homes for enigmatic taxa, and provided a more precise understanding of the evolution of skeletal features, secondary metabolites, body organization, and symbioses. Some of these exciting new discoveries are shared in the papers that form this issue of Integrative and Comparative Biology. Our analyses of over 300 nearly complete 28S ribosomal subunit gene sequences provide specific case studies that illustrate how our dataset confirms new hypotheses of sponge evolution. We recovered monophyletic clades for all 4 classes of sponges, as well as the 4 major clades of Demospongiae (Keratosa, Myxospongiae, Haploscleromorpha, and Heteroscleromorpha), but our phylogeny differs in several aspects from traditional classifications. In most major clades of sponges, families within orders appear to be paraphyletic. Although additional sampling of genes and taxa are needed to establish whether this pattern results from a lack of phylogenetic resolution or from a paraphyletic classification system, many of our results are congruent with those obtained from 18S ribosomal subunit gene sequences and complete mitochondrial genomes. These data provide further support for a revision of the traditional classification of sponges.
C1 [Thacker, Robert W.; Carmack, Cheryl A.; Zappe, Megan E.] Univ Alabama Birmingham, Dept Biol, Birmingham, AL 35294 USA.
[Hill, April L.; Hill, Malcolm S.; Spicer, Lori; Pohlmann, Deborah; Hall, Chelsea] Univ Richmond, Dept Biol, Richmond, VA 23173 USA.
[Redmond, Niamh E.; Collins, Allen G.] Smithsonian Inst, Natl Museum Nat Hist, Dept Invertebrate Zool, Washington, DC 20560 USA.
[Collins, Allen G.] NOAA, Natl Systemat Lab, Fisheries Serv, Natl Museum Nat Hist,Smithsonian Inst, Washington, DC USA.
[Morrow, Christine C.] Queens Univ Belfast, Sch Biol Sci, MBC, Belfast BT9 7BL, Antrim, North Ireland.
[Diaz, Maria C.] Museo Marino Margarita, Boca Del Rio, Nueva Esparta, Venezuela.
[Bangalore, Purushotham V.] Univ Alabama Birmingham, Dept Comp & Informat Sci, Birmingham, AL 35294 USA.
RP Thacker, RW (reprint author), Univ Alabama Birmingham, Dept Biol, 1300 Univ Blvd, Birmingham, AL 35294 USA.
EM thacker@uab.edu
RI Hill, Malcolm/B-6204-2015;
OI Morrow, Christine/0000-0001-5686-8747
FU NIAID NIH HHS [P30 AI027767]
NR 29
TC 19
Z9 19
U1 0
U2 37
PU OXFORD UNIV PRESS INC
PI CARY
PA JOURNALS DEPT, 2001 EVANS RD, CARY, NC 27513 USA
SN 1540-7063
J9 INTEGR COMP BIOL
JI Integr. Comp. Biol.
PD SEP
PY 2013
VL 53
IS 3
BP 373
EP 387
DI 10.1093/icb/ict071
PG 15
WC Zoology
SC Zoology
GA 205MQ
UT WOS:000323448800001
PM 23748742
ER
PT J
AU Redmond, NE
Morrow, CC
Thacker, RW
Diaz, MC
Boury-Esnault, N
Cardenas, P
Hajdu, E
Lobo-Hajdu, G
Picton, BE
Pomponi, SA
Kayal, E
Collins, AG
AF Redmond, N. E.
Morrow, C. C.
Thacker, R. W.
Diaz, M. C.
Boury-Esnault, N.
Cardenas, P.
Hajdu, E.
Lobo-Hajdu, G.
Picton, B. E.
Pomponi, S. A.
Kayal, E.
Collins, A. G.
TI Phylogeny and Systematics of Demospongiae in Light of New Small-Subunit
Ribosomal DNA (18S) Sequences
SO INTEGRATIVE AND COMPARATIVE BIOLOGY
LA English
DT Article; Proceedings Paper
CT Symposium on Assembling the Poriferan Tree of Life at the Annual Meeting
of the Society-for-Integrative-and-Comparative-Biology (SICB)
CY JAN 03-07, 2013
CL San Francisco, CA
SP Soc Integrat & Comparat Biol (SICB)
ID GLASS SPONGES PORIFERA; PHYLUM PORIFERA; MOLECULAR PHYLOGENY; ANIMAL
PHYLOGENY; GENE-SEQUENCES; FOSSIL RECORD; EVOLUTION; HEXACTINELLIDA;
CLASSIFICATION; VERONGIDA
AB The most diverse and species-rich class of the phylum Porifera is Demospongiae. In recent years, the systematics of this clade, which contains more than 7000 species, has developed rapidly in light of new studies combining molecular and morphological observations. We add more than 500 new, nearly complete 18S sequences (an increase of more than 200%) in an attempt to further enhance understanding of the phylogeny of Demospongiae. Our study specifically targets representation of type species and genera that have never been sampled for any molecular data in an effort to accelerate progress in classifying this diverse lineage. Our analyses recover four highly supported subclasses of Demospongiae: Keratosa, Myxospongiae, Haploscleromorpha, and Heteroscleromorpha. Within Keratosa, neither Dendroceratida, nor its two families, Darwinellidae and Dictyodendrillidae, are monophyletic and Dictyoceratida is divided into two lineages, one predominantly composed of Dysideidae and the second containing the remaining families (Irciniidae, Spongiidae, Thorectidae, and Verticillitidae). Within Myxospongiae, we find Chondrosida to be paraphyletic with respect to the Verongida. We amend the latter to include species of the genus Chondrosia and erect a new order Chondrillida to contain remaining taxa from Chondrosida, which we now discard. Even with increased taxon sampling of Haploscleromorpha, our analyses are consistent with previous studies; however, Haliclona species are interspersed in even more clades. Haploscleromorpha contains five highly supported clades, each more diverse than previously recognized, and current families are mostly polyphyletic. In addition, we reassign Janulum spinispiculum to Haploscleromorpha and resurrect Reniera filholi as Janulum filholi comb. nov. Within the large clade Heteroscleromorpha, we confirmed 12 recently identified clades based on alternative data, as well as a sister-group relationship between the freshwater Spongillida and the family Vetulinidae. We transfer Stylissa flabelliformis to the genus Scopalina within the family Scopalinidae, which is of uncertain position. Our analyses uncover a large, strongly supported clade containing all heteroscleromorphs other than Spongillida, Vetulinidae, and Scopalinidae. Within this clade, there is a major division separating Axinellidae, Biemnida, Tetractinellida, Bubaridae, Stelligeridae, Raspailiidae, and some species of Petromica, Topsentia, and Axinyssa from Agelasida, Polymastiidae, Placospongiidae, Clionaidae, Spirastrellidae, Tethyidae, Poecilosclerida, Halichondriidae, Suberitidae, and Trachycladus. Among numerous results: (1) Spirophorina and its family Tetillidae are paraphyletic with respect to a strongly supported Astrophorina within Tetractinellida; (2) Agelasida is the earliest diverging lineage within the second clade listed above; and (3) Merlia and Desmacella appear to be the earliest diverging lineages of Poecilosclerida.
C1 [Redmond, N. E.; Collins, A. G.] Smithsonian Inst, Natl Museum Nat Hist, Dept Invertebrate Zool, Washington, DC 20560 USA.
[Morrow, C. C.] Queens Univ Belfast, Sch Biol Sci, MBC, Belfast BT9 7BL, Antrim, North Ireland.
[Thacker, R. W.] Univ Alabama Birmingham, Dept Biol, Birmingham, AL 35294 USA.
[Diaz, M. C.] Museo Marino Margarita, Boca Del Rio, Nueva Esparta, Venezuela.
[Boury-Esnault, N.] Univ Aix Marseille, Marine Endoume Stn, IMBE CNRS UMR7263, F-13007 Marseille, France.
[Cardenas, P.] Uppsala Univ, Dept Systemat Biol, Evolutionary Biol Ctr, S-75236 Uppsala, Sweden.
[Hajdu, E.] Univ Fed Rio de Janeiro, Museu Nacl, Dept Invertebrados, Rio De Janeiro, RJ, Brazil.
[Lobo-Hajdu, G.] Univ Fed Rio de Janeiro, IBRAG, Dept Genet, Rio De Janeiro, RJ, Brazil.
[Picton, B. E.] Natl Museums Northern Ireland, Dept Nat Sci, Holywood BT18 0EU, North Ireland.
[Pomponi, S. A.] Florida Atlantic Univ, Harbor Branch Oceanog Inst, Ft Pierce, FL 34946 USA.
[Kayal, E.] Smithsonian Inst, Natl Museum Nat Hist, Lab Analyt Biol, Washington, DC 20560 USA.
[Collins, A. G.] NOAA, Natl Systemat Lab, Fisheries Serv, Washington, DC 20560 USA.
RP Redmond, NE (reprint author), Smithsonian Inst, Natl Museum Nat Hist, Dept Invertebrate Zool, Washington, DC 20560 USA.
EM collinsa@si.edu
RI Lobo-Hajdu, G/A-6709-2008; Hajdu, Eduardo/C-3863-2009;
OI Lobo-Hajdu, G/0000-0001-7792-9609; Morrow,
Christine/0000-0001-5686-8747; Picton, Bernard/0000-0002-1500-2215
NR 111
TC 43
Z9 43
U1 4
U2 44
PU OXFORD UNIV PRESS INC
PI CARY
PA JOURNALS DEPT, 2001 EVANS RD, CARY, NC 27513 USA
SN 1540-7063
EI 1557-7023
J9 INTEGR COMP BIOL
JI Integr. Comp. Biol.
PD SEP
PY 2013
VL 53
IS 3
BP 388
EP 415
DI 10.1093/icb/ict078
PG 28
WC Zoology
SC Zoology
GA 205MQ
UT WOS:000323448800002
PM 23793549
ER
PT J
AU Morrow, CC
Redmond, NE
Picton, BE
Thacker, RW
Collins, AG
Maggs, CA
Sigwart, JD
Allcock, AL
AF Morrow, Christine C.
Redmond, Niamh E.
Picton, Bernard E.
Thacker, Robert W.
Collins, Allen G.
Maggs, Christine A.
Sigwart, Julia D.
Allcock, A. Louise
TI Molecular Phylogenies Support Homoplasy of Multiple Morphological
Characters Used in the Taxonomy of Heteroscleromorpha (Porifera:
Demospongiae)
SO INTEGRATIVE AND COMPARATIVE BIOLOGY
LA English
DT Article; Proceedings Paper
CT Symposium on Assembling the Poriferan Tree of Life at the Annual Meeting
of the Society-for-Integrative-and-Comparative-Biology (SICB)
CY JAN 03-07, 2013
CL San Francisco, CA
SP Soc Integrat & Comparat Biol (SICB)
ID SEQUENCE ALIGNMENT; RIBOSOMAL-RNA; SPONGES; SYSTEMATICS; SCLEROSPONGES;
EVOLUTION; ACCURACY; NUCLEAR; MODELS; MUSCLE
AB Sponge classification has long been based mainly on morphocladistic analyses but is now being greatly challenged by more than 12 years of accumulated analyses of molecular data analyses. The current study used phylogenetic hypotheses based on sequence data from 18S rRNA, 28S rRNA, and the CO1 barcoding fragment, combined with morphology to justify the resurrection of the order Axinellida Levi, 1953. Axinellida occupies a key position in different morphologically derived topologies. The abandonment of Axinellida and the establishment of Halichondrida Vosmaer, 1887 sensu lato to contain Halichondriidae Gray, 1867, Axinellidae Carter, 1875, Bubaridae Topsent, 1894, Heteroxyidae Dendy, 1905, and a new family Dictyonellidae van Soest et al., 1990 was based on the conclusion that an axially condensed skeleton evolved independently in separate lineages in preference to the less parsimonious assumption that asters (star-shaped spicules), acanthostyles (club-shaped spicules with spines), and sigmata (C-shaped spicules) each evolved more than once. Our new molecular trees are congruent and contrast with the earlier, morphologically based, trees. The results show that axially condensed skeletons, asters, acanthostyles, and sigmata are all homoplasious characters. The unrecognized homoplasious nature of these characters explains much of the incongruence between molecular-based and morphology-based phylogenies. We use the molecular trees presented here as a basis for re-interpreting the morphological characters within Heteroscleromorpha. The implications for the classification of Heteroscleromorpha are discussed and a new order Biemnida ord. nov. is erected.
C1 [Morrow, Christine C.; Maggs, Christine A.; Sigwart, Julia D.] Queens Univ Belfast, Sch Biol Sci, MBC, Belfast BT9 7BL, Antrim, North Ireland.
[Redmond, Niamh E.; Collins, Allen G.] Smithsonian Inst, Natl Museum Nat Hist, Natl Systemat Lab, Washington, DC 20013 USA.
[Picton, Bernard E.] Natl Museums Northern Ireland, Holywood BT18 0EU, North Ireland.
[Thacker, Robert W.] Univ Alabama Birmingham, Dept Biol, Birmingham, AL 35294 USA.
[Allcock, A. Louise] Natl Univ Ireland Galway, Sch Nat Sci, Galway, Ireland.
[Allcock, A. Louise] Natl Univ Ireland Galway, Ryan Inst, Galway, Ireland.
RP Morrow, CC (reprint author), Queens Univ Belfast, Sch Biol Sci, MBC, 97 Lisburn Rd, Belfast BT9 7BL, Antrim, North Ireland.
EM christinemorrow@gmail.com
RI Allcock, Louise/A-7359-2012;
OI Allcock, Louise/0000-0002-4806-0040; Morrow,
Christine/0000-0001-5686-8747; Picton, Bernard/0000-0002-1500-2215;
Maggs, Christine/0000-0003-0495-7064
NR 69
TC 15
Z9 15
U1 4
U2 24
PU OXFORD UNIV PRESS INC
PI CARY
PA JOURNALS DEPT, 2001 EVANS RD, CARY, NC 27513 USA
SN 1540-7063
J9 INTEGR COMP BIOL
JI Integr. Comp. Biol.
PD SEP
PY 2013
VL 53
IS 3
BP 428
EP 446
DI 10.1093/icb/ict065
PG 19
WC Zoology
SC Zoology
GA 205MQ
UT WOS:000323448800004
PM 23753661
ER
PT J
AU Klautau, M
Azevedo, F
Condor-Lujan, B
Rapp, HT
Collins, A
Russo, CAD
AF Klautau, Michelle
Azevedo, Fernanda
Condor-Lujan, Baslavi
Rapp, Hans Tore
Collins, Allen
de Moraes Russo, Claudia Augusta
TI A Molecular Phylogeny for the Order Clathrinida Rekindles and Refines
Haeckel's Taxonomic Proposal for Calcareous Sponges
SO INTEGRATIVE AND COMPARATIVE BIOLOGY
LA English
DT Article; Proceedings Paper
CT Symposium on Assembling the Poriferan Tree of Life at the Annual Meeting
of the Society-for-Integrative-and-Comparative-Biology (SICB)
CY JAN 03-07, 2013
CL San Francisco, CA
SP Soc Integrat & Comparat Biol (SICB)
ID PORIFERA; CALCINEA; CLASSIFICATION; EVOLUTION; NUCULA; COAST; DNA
AB Most biological groups are still longing for a phylogenetically sound taxonomic organization. In this article, we aimed to verify the consistency of morphological characters in calcarean sponges of the well-known non-monophyletic order Clathrinida using a molecular phylogeny. For this we included 50 species, including six type species, currently assigned to eight different genera. A maximum likelihood topology was generated for the nuclear ITS marker using the General Time Reversible model and the bootstrap reliability test. Our topology indicated 10 clathrinid clades that included species with consistent morphological characters. In the present study, we defined nine of these clades as clathrinid genera, including four newly described and two newly diagnosed genera. Recent studies have indicated that not much phylogenetic information may be found in morphology, but our findings contradict this general assertion. Our study confirms the suitability of skeleton and body anastomosis as valid characters in a phylogenetically sound taxonomy for the order. Interestingly, we have also found that, apart from the Calcinea/Calcaronea split and a few minor details, Haeckel's original proposal is remarkably similar to our own, which was based on a molecular phylogeny 140 years later.
C1 [Klautau, Michelle; Azevedo, Fernanda; Condor-Lujan, Baslavi] Univ Fed Rio de Janeiro, Inst Biol, Dept Zool, BR-21941902 Rio De Janeiro, RJ, Brazil.
[Rapp, Hans Tore] Univ Bergen, Dept Biol, N-5020 Bergen, Norway.
[Rapp, Hans Tore] Univ Bergen, Ctr Geobiol, N-5020 Bergen, Norway.
[Collins, Allen] NOAA, Natl Systemat Lab, Fisheries Serv, Washington, DC 20560 USA.
[Collins, Allen] Smithsonian Inst, Natl Museum Nat Hist, Dept Invertebrate Zool, Washington, DC 20560 USA.
[de Moraes Russo, Claudia Augusta] Univ Fed Rio de Janeiro, Inst Biol, Dept Genet, BR-21941902 Rio De Janeiro, RJ, Brazil.
RP Klautau, M (reprint author), Univ Fed Rio de Janeiro, Inst Biol, Dept Zool, BR-21941902 Rio De Janeiro, RJ, Brazil.
EM mklautau@biologia.ufrj.br
RI Russo, Claudia/I-1217-2012; Klautau, Michelle/I-2041-2012
OI Russo, Claudia/0000-0002-1252-9206; Klautau,
Michelle/0000-0002-5959-0776
NR 32
TC 12
Z9 12
U1 0
U2 11
PU OXFORD UNIV PRESS INC
PI CARY
PA JOURNALS DEPT, 2001 EVANS RD, CARY, NC 27513 USA
SN 1540-7063
EI 1557-7023
J9 INTEGR COMP BIOL
JI Integr. Comp. Biol.
PD SEP
PY 2013
VL 53
IS 3
BP 447
EP 461
DI 10.1093/icb/ict039
PG 15
WC Zoology
SC Zoology
GA 205MQ
UT WOS:000323448800005
PM 23704365
ER
PT J
AU Hajdu, E
de Paula, TS
Redmond, NE
Cosme, B
Collins, AG
Lobo-Hajdu, G
AF Hajdu, Eduardo
de Paula, Thiago S.
Redmond, Niamh E.
Cosme, Bruno
Collins, Allen G.
Lobo-Hajdu, Gisele
TI Mycalina: Another Crack in the Poecilosclerida Framework
SO INTEGRATIVE AND COMPARATIVE BIOLOGY
LA English
DT Article; Proceedings Paper
CT Symposium on Assembling the Poriferan Tree of Life at the Annual Meeting
of the Society-for-Integrative-and-Comparative-Biology (SICB)
CY JAN 03-07, 2013
CL San Francisco, CA
SP Soc Integrat & Comparat Biol (SICB)
ID CLADORHIZIDAE POECILOSCLERIDA; MOLECULAR PHYLOGENY; RIBOSOMAL-RNA;
DEMOSPONGIAE; PORIFERA; SPONGES; MITOCHONDRIAL; HYPOTHESES; NUCLEAR;
ORIGIN
AB This is the first phylogenetic analysis integrating both morphological and molecular data of the sponge suborder Mycalina (Poecilosclerida), which was erected in 1994. A cladistic analysis of morphology supported the monophyly of Cladorhizidae (including Euchelipluma), Guitarridae (excluding Euchelipluma), Isodictyidae, Latrunculiidae, and Podospongiidae but rejected monophyly for Desmacellidae, Esperiopsidae, Hamacanthidae, and Mycalidae. Analyses of partial 16S and partial 28S rRNA datasets combined, as well as that of a complete 18S rDNA dataset, suggest that Mycalina is not monophyletic; Biemnidae is only distantly related to other poecilosclerids; Merlia and Desmacella branch near the base of a diverse Poecilosclerida clade; Mycalidae is monophyletic (excluding Mycale [Anomomycale] titubans in 18S); and Esperiopsidae and Isodictyidae form a clade. Analyses of the two molecular datasets differed on the monophyly of Podospongiidae and about the relationship of Podospongiidae to Isodictyidae + Esperiopsidae.
C1 [Hajdu, Eduardo] Univ Fed Rio de Janeiro, Museu Nacl, BR-20940040 Rio De Janeiro, RJ, Brazil.
[de Paula, Thiago S.; Cosme, Bruno; Lobo-Hajdu, Gisele] Univ Estado Rio de Janeiro, Dept Genet, Inst Biol Roberto Alcantara Gomes, PHLC, BR-20550013 Rio De Janeiro, RJ, Brazil.
[Redmond, Niamh E.] Smithsonian Inst, Natl Museum Nat Hist, Dept Invertebrate Zool, Washington, DC 20013 USA.
[Collins, Allen G.] NOAA, Natl Systemat Lab, Fisheries Serv, Washington, DC 20560 USA.
[Collins, Allen G.] Smithsonian Inst, Natl Museum Nat Hist, Dept Invertebrate Zool, Washington, DC 20560 USA.
RP Hajdu, E (reprint author), Univ Fed Rio de Janeiro, Museu Nacl, Quinta da Boa Vista S-N, BR-20940040 Rio De Janeiro, RJ, Brazil.
EM eduardo.hajdu@gmail.com
RI Lobo-Hajdu, G/A-6709-2008; de Paula, Thiago/B-4301-2014; Hajdu,
Eduardo/C-3863-2009; Cosme, Bruno/R-8115-2016
OI Lobo-Hajdu, G/0000-0001-7792-9609; de Paula, Thiago/0000-0003-4468-4996;
Cosme, Bruno/0000-0002-1985-2540
NR 50
TC 6
Z9 7
U1 1
U2 12
PU OXFORD UNIV PRESS INC
PI CARY
PA JOURNALS DEPT, 2001 EVANS RD, CARY, NC 27513 USA
SN 1540-7063
J9 INTEGR COMP BIOL
JI Integr. Comp. Biol.
PD SEP
PY 2013
VL 53
IS 3
BP 462
EP 472
DI 10.1093/icb/ict074
PG 11
WC Zoology
SC Zoology
GA 205MQ
UT WOS:000323448800006
PM 23798622
ER
PT J
AU Diaz, MC
Thacker, RW
Redmond, NE
Matterson, KO
Collins, AG
AF Diaz, Maria C.
Thacker, Robert W.
Redmond, Niamh E.
Matterson, Kenan O.
Collins, Allen G.
TI Phylogenetic Novelties and Geographic Anomalies among Tropical Verongida
SO INTEGRATIVE AND COMPARATIVE BIOLOGY
LA English
DT Article; Proceedings Paper
CT Symposium on Assembling the Poriferan Tree of Life at the Annual Meeting
of the Society-for-Integrative-and-Comparative-Biology (SICB)
CY JAN 03-07, 2013
CL San Francisco, CA
SP Soc Integrat & Comparat Biol (SICB)
ID MARINE SPONGES; PORIFERA; CHITIN
AB Exploring marine sponges from shallow tropical reefs of the Caribbean and western Central Pacific, as part of large biodiversity (Moorea Biocode Project) and evolutionary (Porifera Tree of Life) research projects, we encountered 13 skeleton-less specimens, initially divided in two morphological groups, which had patterns of coloration and oxidation typical of taxa of the order Verongida (Demospongiae). The first group of samples inhabited open and cryptic habitats of shallow (15-20 m) Caribbean reefs at Bocas del Toro Archipelago, Panama. The second group inhabited schiophilous (e.g., inner coral framework and crevices) habitats on shallow reefs (0.5-20 m deep) in Moorea Island, French Polynesia. We applied an integrative approach by combining analyses of external morphology, histological observations, 18S rDNA, and mtCOI to determine the identity and the relationships of these unknown taxa within the order Verongida. Molecular analyses revealed that none of the species studied belonged to Hexadella (Ianthellidae, Verongida), the only fibreless genus of the Order Verongida currently recognized. The species from the Caribbean locality of Bocas del Toro (Panama) belong to the family Ianthellidae and is closely related to the Pacific genera Ianthella and Anomoianthella, both with well-developed fiber reticulations. We suggest the erection of a new generic denomination to include this novel eurypylous, fibreless ianthellid. The species collected in Moorea were all diplodal verongid taxa, with high affinities to a clade containing Pseudoceratina, Verongula, and Aiolochroia, a Pacific and two Caribbean genera, respectively. These unknown species represented at least three different taxa distinguished by DNA sequence analysis and morphological characteristics. Two new genera and a new species of Pseudoceratina are here proposed to accommodate these novel biological discoveries. The evolutionary and ecological meaning of having or lacking a fiber skeleton within Verongida is challenged under the evidence of the existence of fibreless genera within various verongid clades. Furthermore, the discovery of a fibreless Peudoceratina suggests that the possession of a spongin-chitin fiber reticulation is an "ecological" plastic trait that might be lost under certain conditions, such us growing within another organism's skeletal framework. These results raise new questions about the ecological and evolutionary significance of the development of a fiber skeleton and of sponges' adaptability to various environmental conditions.
C1 [Diaz, Maria C.] Museo Marino, Nueva Esparta, Venezuela.
[Thacker, Robert W.; Matterson, Kenan O.] Univ Alabama Birmingham, Dept Biol, Birmingham, AL 35294 USA.
[Redmond, Niamh E.] Smithsonian Inst, NMNH, Washington, DC 20560 USA.
[Collins, Allen G.] Smithsonian Inst, Natl Museum Nat Hist, Dept Invertebrate Zool, Washington, DC 20560 USA.
[Collins, Allen G.] NOAA, Natl Systemat Lab, Fisheries Serv, Natl Museum Nat Hist,Smithsonian Inst, Washington, DC USA.
RP Diaz, MC (reprint author), Museo Marino, Blvd Boca Del Rio, Nueva Esparta, Venezuela.
EM taxochica@gmail.com; thacker@uab.edu
NR 23
TC 6
Z9 6
U1 1
U2 16
PU OXFORD UNIV PRESS INC
PI CARY
PA JOURNALS DEPT, 2001 EVANS RD, CARY, NC 27513 USA
SN 1540-7063
J9 INTEGR COMP BIOL
JI Integr. Comp. Biol.
PD SEP
PY 2013
VL 53
IS 3
BP 482
EP 494
DI 10.1093/icb/ict033
PG 13
WC Zoology
SC Zoology
GA 205MQ
UT WOS:000323448800008
PM 23624868
ER
PT J
AU Laliberte, E
Turner, BL
Zemunik, G
Wyrwoll, KH
Pearse, SJ
Lambers, H
AF Laliberte, Etienne
Turner, Benjamin L.
Zemunik, Graham
Wyrwoll, Karl-Heinz
Pearse, Stuart J.
Lambers, Hans
TI Nutrient limitation along the Jurien Bay dune chronosequence: response
to Uren & Parsons (2013)
SO JOURNAL OF ECOLOGY
LA English
DT Letter
DE calcareous dune; calcifuge; chronosequence; micronutrients; nutrient
limitation; parent material; pedogenesis; plant-soil (below-ground)
interactions
ID SOUTH-WESTERN AUSTRALIA; SWAN COASTAL-PLAIN; SOUTHWESTERN AUSTRALIA;
PLANT-COMMUNITIES; EASTERN AUSTRALIA; LUPINUS-ALBUS; YELLOW SAND; PERTH
BASIN; PHOSPHORUS; PHOSPHATE
AB 1. Uren & Parsons (2013) criticize our nutrient addition experiment and question the integrity of the Jurien Bay dune chronosequence. Their primary criticisms relate to (i) inconsistencies in parent material along the chronosequence and (ii) the lack of consideration of micronutrients in our glasshouse experiment.
2. We reaffirm that the Quindalup-Spearwood succession is a consistent Holocene-Middle (possibly Early) Pleistocene soil chronosequence in which parent material, topography, and present-day climate and vegetation type (i.e. Mediterranean shrubland) are held relatively constant. The older (Early Pleistocene-Late Pliocene) Bassendean Sand probably contained less carbonate initially, but nevertheless represents the endpoint of an exceptionally strong gradient in soil nutrient availability.
3. The claim that we did not consider the potential importance of micronutrients is unfounded. We included a micronutrient treatment in our experiment and discussed the importance of micronutrient availability in young calcareous substrates.
4. Synthesis. We restate that our experimental results support predictions about changes in nutrient limitation during long-term pedogenesis, and affirm that the Jurien Bay chronosequence is a valuable model system for addressing ecological questions related to pedogenesis, plant diversity and plant-soil interactions.
C1 [Laliberte, Etienne; Turner, Benjamin L.; Zemunik, Graham; Pearse, Stuart J.; Lambers, Hans] Univ Western Australia, Sch Plant Biol, Perth, WA 6009, Australia.
[Turner, Benjamin L.] Smithsonian Trop Res Inst, Balboa, Ancon, Panama.
[Wyrwoll, Karl-Heinz] Univ Western Australia, Sch Earth & Environm, Perth, WA 6009, Australia.
RP Laliberte, E (reprint author), Univ Western Australia, Sch Plant Biol, 35 Stirling Highway, Perth, WA 6009, Australia.
EM etienne.laliberte@uwa.edu.au
RI Turner, Benjamin/E-5940-2011; Laliberte, Etienne/B-6855-2008; Lambers,
Hans/A-1544-2008
OI Turner, Benjamin/0000-0002-6585-0722; Laliberte,
Etienne/0000-0002-3167-2622; Lambers, Hans/0000-0002-4118-2272
NR 36
TC 7
Z9 7
U1 2
U2 35
PU WILEY-BLACKWELL
PI HOBOKEN
PA 111 RIVER ST, HOBOKEN 07030-5774, NJ USA
SN 0022-0477
J9 J ECOL
JI J. Ecol.
PD SEP
PY 2013
VL 101
IS 5
BP 1088
EP 1092
DI 10.1111/1365-2745.12123
PG 5
WC Plant Sciences; Ecology
SC Plant Sciences; Environmental Sciences & Ecology
GA 208SG
UT WOS:000323699000002
ER
PT J
AU Chisholm, RA
Muller-Landau, HC
Abdul Rahman, K
Bebber, DP
Bin, Y
Bohlman, SA
Bourg, NA
Brinks, J
Bunyavejchewin, S
Butt, N
Cao, HL
Cao, M
Cardenas, D
Chang, LW
Chiang, JM
Chuyong, G
Condit, R
Dattaraja, HS
Davies, S
Duque, A
Fletcher, C
Gunatilleke, N
Gunatilleke, S
Hao, ZQ
Harrison, RD
Howe, R
Hsieh, CF
Hubbell, SP
Itoh, A
Kenfack, D
Kiratiprayoon, S
Larson, AJ
Lian, JY
Lin, DM
Liu, HF
Lutz, JA
Ma, KP
Malhi, Y
McMahon, S
McShea, W
Meegaskumbura, M
Razman, SM
Morecroft, MD
Nytch, CJ
Oliveira, A
Parker, GG
Pulla, S
Punchi-Manage, R
Romero-Saltos, H
Sang, WG
Schurman, J
Su, SH
Sukumar, R
Sun, IF
Suresh, HS
Tan, S
Thomas, D
Thomas, S
Thompson, J
Valencia, R
Wolf, A
Yap, S
Ye, WH
Yuan, ZQ
Zimmerman, JK
AF Chisholm, Ryan A.
Muller-Landau, Helene C.
Abdul Rahman, Kassim
Bebber, Daniel P.
Bin, Yue
Bohlman, Stephanie A.
Bourg, Norman A.
Brinks, Joshua
Bunyavejchewin, Sarayudh
Butt, Nathalie
Cao, Honglin
Cao, Min
Cardenas, Dairon
Chang, Li-Wan
Chiang, Jyh-Min
Chuyong, George
Condit, Richard
Dattaraja, Handanakere S.
Davies, Stuart
Duque, Alvaro
Fletcher, Christine
Gunatilleke, Nimal
Gunatilleke, Savitri
Hao, Zhanqing
Harrison, Rhett D.
Howe, Robert
Hsieh, Chang-Fu
Hubbell, Stephen P.
Itoh, Akira
Kenfack, David
Kiratiprayoon, Somboon
Larson, Andrew J.
Lian, Juyu
Lin, Dunmei
Liu, Haifeng
Lutz, James A.
Ma, Keping
Malhi, Yadvinder
McMahon, Sean
McShea, William
Meegaskumbura, Madhava
Razman, Salim Mohd
Morecroft, Michael D.
Nytch, Christopher J.
Oliveira, Alexandre
Parker, Geoffrey G.
Pulla, Sandeep
Punchi-Manage, Ruwan
Romero-Saltos, Hugo
Sang, Weiguo
Schurman, Jon
Su, Sheng-Hsin
Sukumar, Raman
Sun, I-Fang
Suresh, Hebbalalu S.
Tan, Sylvester
Thomas, Duncan
Thomas, Sean
Thompson, Jill
Valencia, Renato
Wolf, Amy
Yap, Sandra
Ye, Wanhui
Yuan, Zuoqiang
Zimmerman, Jess K.
TI Scale-dependent relationships between tree species richness and
ecosystem function in forests
SO JOURNAL OF ECOLOGY
LA English
DT Article
DE biodiversity; biomass; complementarity; determinants of plant community
diversity and structure; productivity; sampling effects; species
diversity; trees
ID TROPICAL FOREST; REGRESSION-ANALYSIS; POOR PREDICTOR; PRODUCTIVITY;
DIVERSITY; BIODIVERSITY; VEGETATION; METAANALYSES; CONSERVATION;
COMPETITION
AB 1. The relationship between species richness and ecosystem function, as measured by productivity or biomass, is of long-standing theoretical and practical interest in ecology. This is especially true for forests, which represent a majority of global biomass, productivity and biodiversity.
2. Here, we conduct an analysis of relationships between tree species richness, biomass and productivity in 25 forest plots of area 8-50ha from across the world. The data were collected using standardized protocols, obviating the need to correct for methodological differences that plague many studies on this topic.
3. We found that at very small spatial grains (0.04ha) species richness was generally positively related to productivity and biomass within plots, with a doubling of species richness corresponding to an average 48% increase in productivity and 53% increase in biomass. At larger spatial grains (0.25ha, 1ha), results were mixed, with negative relationships becoming more common. The results were qualitatively similar but much weaker when we controlled for stem density: at the 0.04ha spatial grain, a doubling of species richness corresponded to a 5% increase in productivity and 7% increase in biomass. Productivity and biomass were themselves almost always positively related at all spatial grains.
4. Synthesis. This is the first cross-site study of the effect of tree species richness on forest biomass and productivity that systematically varies spatial grain within a controlled methodology. The scale-dependent results are consistent with theoretical models in which sampling effects and niche complementarity dominate at small scales, while environmental gradients drive patterns at large scales. Our study shows that the relationship of tree species richness with biomass and productivity changes qualitatively when moving from scales typical of forest surveys (0.04ha) to slightly larger scales (0.25 and 1ha). This needs to be recognized in forest conservation policy and management.
C1 [Chisholm, Ryan A.; Muller-Landau, Helene C.; Condit, Richard; Hubbell, Stephen P.] Smithsonian Trop Res Inst, Balboa, Ancon, Panama.
[Abdul Rahman, Kassim; Fletcher, Christine; Razman, Salim Mohd] Forest Res Inst Malaysia, Kepong 52109, Selangor Darul, Malaysia.
[Bebber, Daniel P.] Earthwatch Inst, Oxford OX2 7DE, England.
[Bin, Yue; Cao, Honglin; Lian, Juyu; Ye, Wanhui] Chinese Acad Sci, South China Bot Garden, Key Lab Plant Resources Conservat & Sustainable U, Guangzhou 510650, Guangdong, Peoples R China.
[Bohlman, Stephanie A.] Univ Florida, Sch Forest Resources & Conservat, Gainesville, FL 32611 USA.
[Bourg, Norman A.; McShea, William] Natl Zool Pk, Smithsonian Conservat Biol Inst, Conservat Ecol Ctr, Front Royal, VA 22630 USA.
[Brinks, Joshua; McMahon, Sean; Parker, Geoffrey G.] Smithsonian Environm Res Ctr, Edgewater, MD 21037 USA.
[Bunyavejchewin, Sarayudh] Dept Natl Pk Wildlife & Plant Conservat, Res Off, Bangkok 10900, Thailand.
[Butt, Nathalie; Malhi, Yadvinder] Univ Oxford, Sch Geog & Environm, Environm Change Inst, Oxford OX1 3QY, England.
[Butt, Nathalie] Univ Queensland, ARC Ctr Excellence Environm Decis, St Lucia, Qld 4072, Australia.
[Cao, Min] Chinese Acad Sci, Xishuangbanna Trop Bot Garden, Key Lab Trop Forest Ecol, Kunming 650223, Peoples R China.
[Cardenas, Dairon] Inst Amazon Invest Cient Sinchi, Bogota, Colombia.
[Chang, Li-Wan; Su, Sheng-Hsin] Taiwan Forestry Res Inst, Taipei 10066, Taiwan.
[Chiang, Jyh-Min] Tunghai Univ, Dept Life Sci, Taichung 40704, Taiwan.
[Chuyong, George] Univ Buea, Dept Plant & Anim Sci, Buea, Swp, Cameroon.
[Dattaraja, Handanakere S.; Pulla, Sandeep; Sukumar, Raman; Suresh, Hebbalalu S.] Indian Inst Sci, Ctr Ecol Sci, Bangalore 560012, Karnataka, India.
[Davies, Stuart; Kenfack, David; Tan, Sylvester] Smithsonian Inst, Dept Bot, MRC 166, Washington, DC 20013 USA.
[Duque, Alvaro] Univ Nacl Colombia, Medellin, Colombia.
[Gunatilleke, Nimal; Gunatilleke, Savitri; Meegaskumbura, Madhava] Univ Peradeniya, Fac Sci, Dept Bot, Peradeniya 20400, Sri Lanka.
[Hao, Zhanqing; Yuan, Zuoqiang] Chinese Acad Sci, Inst Appl Ecol, State Key Lab Forest & Soil Ecol, Shenyang 110164, Peoples R China.
[Harrison, Rhett D.] Chinese Acad Sci, Kunming Inst Bot, Kunming 650201, Peoples R China.
[Harrison, Rhett D.] World Agroforestry Inst, East Asia Off, Kunming 650201, Peoples R China.
[Howe, Robert; Wolf, Amy] Univ Wisconsin Green Bay, Dept Nat & Appl Sci, Green Bay, WI 54311 USA.
[Hsieh, Chang-Fu] Natl Taiwan Univ, Inst Ecol & Evolutionary Biol, Taipei 10617, Taiwan.
[Hubbell, Stephen P.] Univ Calif Los Angeles, Dept Ecol & Evolutionary Biol, Los Angeles, CA 90095 USA.
[Itoh, Akira] Osaka City Univ, Grad Sch Sci, Osaka 5588585, Japan.
[Kiratiprayoon, Somboon] Thammasat Univ Rangsit, Fac Sci & Technol, Klongluang 12121, Patumtani, Thailand.
[Larson, Andrew J.] Univ Montana, Dept Forest Management, Missoula, MT 59812 USA.
[Lin, Dunmei; Liu, Haifeng; Ma, Keping; Sang, Weiguo] Chinese Acad Sci, Inst Bot, State Key Lab Vegetat & Environm Change, Beijing 100093, Peoples R China.
[Lin, Dunmei] Chinese Acad Sci, Grad Univ, Beijing 100049, Peoples R China.
[Liu, Haifeng; Sang, Weiguo] Minzu Univ China, Coll Life & Environm Sci, Beijing 100081, Peoples R China.
[Lutz, James A.] Utah State Univ, Wildland Resources Dept, Logan, UT 84322 USA.
[Morecroft, Michael D.] Nat England, Winchester SO23 7BT, Hants, England.
[Nytch, Christopher J.; Thompson, Jill; Zimmerman, Jess K.] Univ Puerto Rico, Inst Trop Ecosyst Studies, San Juan, PR 00936 USA.
[Oliveira, Alexandre] Univ Sao Paulo, Dept Ecol IB, BR-04582050 Sao Paulo, Brazil.
[Punchi-Manage, Ruwan] Univ Gottingen, Dept Ecosyst Modeling, D-37077 Gottingen, Germany.
[Romero-Saltos, Hugo; Valencia, Renato] Pontificia Univ Catolica Ecuador, Escuela Ciencias Biol, Quito, Ecuador.
[Schurman, Jon; Thomas, Sean] Univ Toronto, Toronto, ON M5S 3B3, Canada.
[Sun, I-Fang] Natl Dong Hwa Univ, Dept Nat Resources & Environm Studies, Hualien 97401, Taiwan.
[Thomas, Duncan] Oregon State Univ, Dept Bot & Plant Pathol, Corvallis, OR 97331 USA.
[Thompson, Jill] Ctr Ecol & Hydrol, Penicuik EH26 0QB, Midlothian, Scotland.
[Yap, Sandra] Univ Philippines Diliman, Inst Biol, Quezon City 1101, Ncr, Philippines.
RP Chisholm, RA (reprint author), Smithsonian Trop Res Inst, POB 0843-03092, Balboa, Ancon, Panama.
EM ryan.chis@gmail.com
RI Butt, Nathalie/B-3558-2014; Thompson, Jill/K-2200-2012; Oliveira,
Alexandre/G-8830-2012; Chisholm, Ryan/H-8033-2012;
OI Butt, Nathalie/0000-0003-1517-6191; Thompson, Jill/0000-0002-4370-2593;
Oliveira, Alexandre/0000-0001-5526-8109; Lin,
Dunmei/0000-0001-6112-7783; Chiang, Jyh-Min/0000-0002-6293-1551; Bourg,
Norman/0000-0002-7443-1992; Parker, Geoffrey/0000-0001-7055-6491
FU US National Science Foundation [DEB-1046113, BSR-9015961, DEB-0516066,
BSR-8811902, DEB-9411973, DEB-008538, DEB-0218039, DEB-0620910];
National Natural Science Foundation of China [31011120470, 31061160188];
Smithsonian Institution Global Earth Observatories; HSBC Climate
Partnership; Chinese Academy of Sciences [KZCX2-YW-430]; National
Science & Technology Pillar Program of China [2008BAC39B02]; Bureau of
China Foreign Expert and Ministry of Education [2008 B08044]; Council of
Agriculture of Taiwan [93AS 2.4.2-FI-G1(2), 94AS-11.1.2-FI-G1(1)];
National Science Council of Taiwan [NSC92-3114-B002-009,
NSC98-2313-B-029-001-MY3, NSC98-2321-B-029-002]; Forestry Bureau of
Taiwan [92-00-2-06, TFBM-960226]; Taiwan Forestry Research Institute [97
AS- 7.1.1.F1-G1]; Mellon Foundation; International Institute of Tropical
Forestry of the USDA Forest Service; University of Puerto Rico; 1923
Fund; Direccion de Investigaciones Universidad Nacional de Colombia;
Centre for Ecology and Hydrology; German Academic Exchange Services
(DAAD); Ministry of Environment & Forests (Government of India);
Tamilnadu Forest Department; Sarawak Forest Department; Sarawak Forestry
Corporation; Global Environment Research Fund of the Ministry of the
Environment Japan [D-0901]; Japan Society for the Promotion of Science
[20405011]; Pontifical Catholic University of Ecuador; government of
Ecuador (Donaciones del Impuesto a la Renta); Smithsonian Tropical
Research Institute; University of Aarhus of Denmark; Yosemite National
Park
FX This work was generated using data from the Center for Tropical Forest
Science/Smithsonian Institution Global Earth Observatory network
(http://www.sigeo.si.edu/). The synthesis was made possible through the
financial support of the US National Science Foundation (DEB-1046113),
the National Natural Science Foundation of China (31011120470), the
Smithsonian Institution Global Earth Observatories and the HSBC Climate
Partnership. Individual plot data collection and analysis were supported
by the US National Science Foundation (BSR-9015961, DEB-0516066,
BSR-8811902, DEB-9411973, DEB-008538, DEB-0218039, and DEB-0620910), the
National Natural Science Foundation of China (31061160188), the Chinese
Academy of Sciences (KZCX2-YW-430), the National Science & Technology
Pillar Program of China (2008BAC39B02), the '111 Program' from the
Bureau of China Foreign Expert and Ministry of Education (No. 2008
B08044), the Council of Agriculture of Taiwan (93AS 2.4.2-FI-G1(2) and
94AS-11.1.2-FI-G1(1)), the National Science Council of Taiwan
(NSC92-3114-B002-009, NSC98-2313-B-029-001-MY3 and
NSC98-2321-B-029-002), the Forestry Bureau of Taiwan (92-00-2-06 and No.
TFBM-960226), the Taiwan Forestry Research Institute (97 AS-
7.1.1.F1-G1), the Mellon Foundation, the International Institute of
Tropical Forestry of the USDA Forest Service, the University of Puerto
Rico, Yosemite National Park, the 1923 Fund, the Direccion de
Investigaciones Universidad Nacional de Colombia (Convocatoria
2010-2012), the Centre for Ecology and Hydrology, the German Academic
Exchange Services (DAAD), Ministry of Environment & Forests (Government
of India), the Tamilnadu Forest Department, Sarawak Forest Department,
Sarawak Forestry Corporation, Global Environment Research Fund of the
Ministry of the Environment Japan (D-0901), Japan Society for the
Promotion of Science (#20405011), the Pontifical Catholic University of
Ecuador, the government of Ecuador (Donaciones del Impuesto a la Renta),
the Smithsonian Tropical Research Institute and the University of Aarhus
of Denmark. We thank the hundreds of people who contributed to the
collection and organization of the data from the plots, including Gordon
Campbell, Gary Fewless, Maria Uriarte and Linfang Wu. We thank Stephen
Pacala, Roman Carrasco and Colin Beale for discussions. None of the
authors has any conflict of interest.
NR 51
TC 2
Z9 2
U1 6
U2 283
PU WILEY-BLACKWELL
PI HOBOKEN
PA 111 RIVER ST, HOBOKEN 07030-5774, NJ USA
SN 0022-0477
J9 J ECOL
JI J. Ecol.
PD SEP
PY 2013
VL 101
IS 5
DI 10.1111/1365-2745.12132
PG 10
WC Plant Sciences; Ecology
SC Plant Sciences; Environmental Sciences & Ecology
GA 208SG
UT WOS:000323699000013
ER
PT J
AU Cheesman, AW
Winter, K
AF Cheesman, Alexander W.
Winter, Klaus
TI Growth response and acclimation of CO2 exchange characteristics to
elevated temperatures in tropical tree seedlings
SO JOURNAL OF EXPERIMENTAL BOTANY
LA English
DT Article
DE Functional trait; Panama; photosynthesis; respiration; temperature;
tropical forest
ID NIGHTTIME TEMPERATURES; PHENOTYPIC PLASTICITY; ALTITUDINAL VARIATION;
BIOTIC ATTRITION; MOUNTAIN PASSES; CLIMATE-CHANGE; WARMER PLANET; RANGE
SHIFTS; LEAF MASS; FOREST
AB Predictions of how tropical forests will respond to future climate change are constrained by the paucity of data on the performance of tropical species under elevated growth temperatures. In particular, little is known about the potential of tropical species to acclimate physiologically to future increases in temperature. Seedlings of 10 neo-tropical tree species from different functional groups were cultivated in controlled-environment chambers under four day/night temperature regimes between 30/22 C and 39/31 C. Under well-watered conditions, all species showed optimal growth at temperatures above those currently found in their native range. While non-pioneer species experienced catastrophic failure or a substantially reduced growth rate under the highest temperature regime employed (i.e. daily average of 35 C), growth in three lowland pioneers showed only a marginal reduction. In a subsequent experiment, three species (Ficus insipida, Ormosia macrocalyx, and Ochroma pyramidale) were cultivated at two temperatures determined as sub- and superoptimal for growth, but which resulted in similar biomass accumulation despite a 6C difference in growth temperature. Through reciprocal transfer and temperature adjustment, the role of thermal acclimation in photosynthesis and respiration was investigated. Acclimation potential varied among species, with two distinct patterns of respiration acclimation identified. The study highlights the role of both inherent temperature tolerance and thermal acclimation in determining the ability of tropical tree species to cope with enhanced temperatures.
C1 [Cheesman, Alexander W.; Winter, Klaus] Smithsonian Trop Res Inst, Balboa, Ancon, Panama.
RP Cheesman, AW (reprint author), Smithsonian Trop Res Inst, Apartado 0843-03092, Balboa, Ancon, Panama.
EM Alexander.Cheesman@gmail.com
RI Cheesman, Alexander/H-5918-2013
OI Cheesman, Alexander/0000-0003-3931-5766
FU Smithsonian Tropical Research Institute, through the Center for Tropical
Forest Studies (CTFS); Smithsonian Institute Global Earth Observatory
(SIGEO)
FX This work was supported by the Smithsonian Tropical Research Institute,
through the Center for Tropical Forest Studies (CTFS) and Smithsonian
Institute Global Earth Observatory (SIGEO). We would like to thank Lucas
Cernusak and Kelly Andersen for comments on an earlier draft of this
manuscript, as well as Kelly Anderson and Stuart Dennis for statistical
advice.
NR 75
TC 14
Z9 14
U1 7
U2 86
PU OXFORD UNIV PRESS
PI OXFORD
PA GREAT CLARENDON ST, OXFORD OX2 6DP, ENGLAND
SN 0022-0957
J9 J EXP BOT
JI J. Exp. Bot.
PD SEP
PY 2013
VL 64
IS 12
BP 3817
EP 3828
DI 10.1093/jxb/ert211
PG 12
WC Plant Sciences
SC Plant Sciences
GA 207DY
UT WOS:000323578700022
PM 23873999
ER
PT J
AU McCleery, R
Oli, MK
Hostetler, JA
Karmacharya, B
Greene, D
Winchester, C
Gore, J
Sneckenberger, S
Castleberry, SB
Mengak, MT
AF McCleery, R.
Oli, M. K.
Hostetler, J. A.
Karmacharya, B.
Greene, D.
Winchester, C.
Gore, J.
Sneckenberger, S.
Castleberry, S. B.
Mengak, M. T.
TI Are declines of an endangered mammal predation-driven, and can a
captive-breeding and release program aid their recovery?
SO JOURNAL OF ZOOLOGY
LA English
DT Article
DE Key Largo woodrat; capture-mark-recapture analysis; predation; Pradel's
model; survival; recruitment; release; captive breeding
ID KEY-LARGO WOODRAT; NEOTOMA-FLORIDANA-SMALLI; CAPTURE-MARK-RECAPTURE;
POPULATION-GROWTH RATE; ACORN MAST; SURVIVAL; RECRUITMENT; RODENT;
DYNAMICS; ANIMALS
AB Declines of imperiled small mammals are often attributed to predation without investigating the relative influence of survival and reproductive parameters on population growth. Accordingly, declines in the endangered Key Largo woodrat Neotoma floridana smalli (KLWR) population have been attributed to predation by feral cats Felis catus, Burmese pythons Python molurus bivittatus and raccoons Procyon lotor. We estimated survival, recruitment and realized population growth rates from four capture-mark-recapture studies to determine if the pattern of demographic variation was consistent with predation as the primary cause of KLWR declines. Additionally, we evaluated the KLWR captive-breeding and release program by comparing survival of captive-born and released KLWRs to wild-born KLWRs. The realized population growth rate of wild-born KLWRs had a strong pattern of covariation with recruitment; covariation between the realized population growth rate and apparent survival was negligible. Consistent with demographic theory, our results suggest that KLWR population dynamics were driven primarily by variation in recruitment, and that periodic reductions in recruitment led to population declines. We found that the survival curve and the first month (S-1) and first 3-month (S1-3) survival estimates for the wild-born KLWRs [S-1 = 0.929 (0.890-0.968); S1-3 = 0.942 (0.919-0.965)] were considerably higher ((2) = 33.9, 1 d.f., P < 0.001) than released KLWRs [S-1 = 0.521 (0.442-0.600); S1-3 = 0.561 (0.493-0.629)]. Low survival rates from predation limited the success of the captive-breeding and release program. This study illustrates the importance of pre-release conditioning of captive-bred animals and the importance of considering reproductive parameters in conjunction with survival estimates to understand the drivers of population decline.
C1 [McCleery, R.; Oli, M. K.; Greene, D.] Univ Florida, Dept Wildlife Ecol & Conservat, Gainesville, FL 32611 USA.
[Hostetler, J. A.] Smithsonian Migratory Bird Ctr, Washington, DC USA.
[Karmacharya, B.] Univ Louisiana Lafayette, Dept Biol, Lafayette, LA 70504 USA.
[Winchester, C.; Gore, J.] Florida Fish & Wildlife Conservat Commiss, Panama City, FL USA.
[Sneckenberger, S.] US Fish & Wildlife Serv, South Florida Ecol Serv Off, Vero Beach, FL USA.
[Castleberry, S. B.; Mengak, M. T.] Univ Georgia, Warnell Sch Forestry & Nat Resources, Athens, GA 30602 USA.
RP McCleery, R (reprint author), Univ Florida, Dept Wildlife Ecol & Conservat, Newins Zeigler Hall, Gainesville, FL 32611 USA.
EM ramccleery@ufl.edu
RI Hostetler, Jeffrey/A-3345-2011;
OI Hostetler, Jeffrey/0000-0003-3669-1758; McCleery,
Robert/0000-0001-7018-005X
FU USFWS [F11AP00176]; University of Florida Institute for Food and
Agricultural Science
FX Special thanks to Phil Frank, Steve Klett, the field technicians,
volunteers and USFWS employees whose hard work was invaluable to this
project. The findings and conclusions in this article are those of the
authors and do not necessarily represent the views of the US Fish and
Wildlife Service. Funding was provided by the USFWS (Agreement No.
F11AP00176) and the University of Florida Institute for Food and
Agricultural Science.
NR 50
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U1 4
U2 81
PU WILEY-BLACKWELL
PI HOBOKEN
PA 111 RIVER ST, HOBOKEN 07030-5774, NJ USA
SN 0952-8369
J9 J ZOOL
JI J. Zool.
PD SEP
PY 2013
VL 291
IS 1
BP 59
EP 68
DI 10.1111/jzo.12046
PG 10
WC Zoology
SC Zoology
GA 206SE
UT WOS:000323541900008
ER
PT J
AU Larjavaara, M
Muller-Landau, HC
AF Larjavaara, Markku
Muller-Landau, Helene C.
TI Measuring tree height: a quantitative comparison of two common field
methods in a moist tropical forest
SO METHODS IN ECOLOGY AND EVOLUTION
LA English
DT Article
DE Barro Colorado Island; Central America; clinometer; hypsometer;
inclinometer; lowland forest; rain forest; tree stature
ID RAIN-FOREST; ALLOMETRY; CANOPY
AB 1. Tree height is a key variable for estimating tree biomass and investigating tree life history, but it is difficult to measure in forests with tall, dense canopies and wide crowns. The traditional method, which we refer to as the 'tangent method', involves measuring horizontal distance to the tree and angles from horizontal to the top and base of the tree, while standing at a distance of perhaps one tree height or greater. Laser rangefinders enable an alternative method, which we refer to as the 'sine method'; it involves measuring the distances to the top and base of the tree, and the angles from horizontal to these, and can be carried out from under the tree or from some distance away.
2. We quantified systematic and random errors of these two methods as applied by five technicians to a size-stratified sample of 74 trees between 5.7 and 39.2m tall in a Neotropical moist forest in Panama. We measured actual heights using towers adjacent to these trees.
3. The tangent method produced unbiased height estimates, but random error was high, and in 6 of the 370measurements, heights were overestimated by more than 100%.
4. The sine method was faster to learn, displayed less variation in heights among technicians, and had lower random error, but resulted in systematic underestimation by 20% on average.
5. We recommend the sine method for most applications in tropical forests. However, its underestimation, which is likely to vary with forest and instrument type, must be corrected if actual heights are needed.
C1 [Larjavaara, Markku] Finnish Forest Res Inst, FI-01301 Vantaa, Finland.
[Muller-Landau, Helene C.] Smithsonian Trop Res Inst, Balboa, Ancon, Panama.
RP Larjavaara, M (reprint author), Finnish Forest Res Inst, Jokiniemenkuja 1,Box 18, FI-01301 Vantaa, Finland.
EM markku.larjavaara@gmail.com
OI Larjavaara, Markku/0000-0002-3484-889X
FU HSBC Climate Partnership; Smithsonian Institution Global Earth
Observatories for the CTFS-SIGEO Global Forest Carbon Research
Initiative; US National Science Foundation [0756920, 0201307]; Frank
Levinson Family Foundation
FX We thank Ervan Rutishauser, Denis Valle and another reviewer for
comments on the manuscript; Ron McRoberts and Bram van Putten for advice
on statistical terminology; and L. Aguilar, M. Gaitan, P. Ramos, P.
Villarreal and D. Zuniga for assistance in the field. We gratefully
acknowledge the financial support of the HSBC Climate Partnership and
the Smithsonian Institution Global Earth Observatories for the
CTFS-SIGEO Global Forest Carbon Research Initiative
(www.ctfs.si.edu/group/Carbon). US National Science Foundation (Award
Number: 0756920, 0201307) and the Frank Levinson Family Foundation
funding for the towers made this study possible. M.L. & H.C.M. developed
the idea for the study, M.L. organized the fieldwork, H.C.M. & M.L.
analysed the data, and M.L. & H.C.M. wrote the paper.
NR 27
TC 29
Z9 29
U1 3
U2 47
PU WILEY-BLACKWELL
PI HOBOKEN
PA 111 RIVER ST, HOBOKEN 07030-5774, NJ USA
SN 2041-210X
EI 2041-2096
J9 METHODS ECOL EVOL
JI Methods Ecol. Evol.
PD SEP
PY 2013
VL 4
IS 9
BP 793
EP 801
DI 10.1111/2041-210X.12071
PG 9
WC Ecology
SC Environmental Sciences & Ecology
GA 209ED
UT WOS:000323736200001
ER
PT J
AU Clough, GW
AF Clough, G. Wayne
TI From the Castle
SO SMITHSONIAN
LA English
DT Editorial Material
C1 Smithsonian Inst, Washington, DC 20560 USA.
RP Clough, GW (reprint author), Smithsonian Inst, Washington, DC 20560 USA.
NR 0
TC 0
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U1 0
U2 0
PU SMITHSONIAN ASSOC
PI WASHINGTON
PA 900 JEFFERSON DR, WASHINGTON, DC 20560 USA
SN 0037-7333
J9 SMITHSONIAN
JI Smithsonian
PD SEP
PY 2013
VL 44
IS 5
BP 10
EP 10
PG 1
WC Humanities, Multidisciplinary
SC Arts & Humanities - Other Topics
GA 209YW
UT WOS:000323797500007
ER
PT J
AU Martinez, C
Madrinan, S
Zavada, M
Jaramillo, CA
AF Martinez, Camila
Madrinan, Santiago
Zavada, Michael
Jaramillo, Carlos Alberto
TI Tracing the fossil pollen record of Hedyosmum (Chloranthaceae), an old
lineage with recent Neotropical diversification
SO GRANA
LA English
DT Article
DE Asteropollis; Clavainaperturites microclavatus; Miocene; Neotropics
ID CRETACEOUS ANGIOSPERM POLLEN; REPRODUCTIVE STRUCTURES; BASAL
ANGIOSPERMS; FLOWERING PLANTS; EARLY EVOLUTION; SOUTH-AMERICA; LATE
MIOCENE; SCALE DATA; COLOMBIA; PALEOBOTANY
AB Chloranthaceae represent one of the oldest angiosperm lineages. Hedyosmum, with 45 species, is the only Neotropical genus in the family. The first appearance of Hedyosmum-like pollen was in the Early Cretaceous (approximate to 112Ma). The next unequivocal record of Hedyosmum-like pollen (Clavainaperturites microclavatus) occurred in the early Miocene. The main objective of this study was to determine the relationship between the fossil C. microclavatus and extant representatives of Hedyosmum. Pollen was examined using light, scanning and transmission electron microscopy. Based on a phylogenetic analysis of pollen traits of Chloranthaceae, we concluded that C. microclavatus is related to Hedyosmum. The abundant Neogene fossil evidence of C. microclavatus from South America showed that the ancestor of extant Hedyosmum migrated to tropical South America during the early Miocene and occupied initially lowlands. A comparison of the C. microclavatus fossil record from both Panama and Colombia/Venezuela suggests that the first Neotropical migration of Hedyosmum was from South America to Central America. The abundant Plio-Pleistocene C. microclavatus from Andean regions supports the hypothesis of a recent radiation of the genus as a consequence of the uplift of the tropical Andes. The biogeographic history of Hedyosmum provides an example of recent enrichment of the Neotropical flora.
C1 [Martinez, Camila; Jaramillo, Carlos Alberto] Smithsonian Trop Res Inst, Ancon, Panama.
[Martinez, Camila; Madrinan, Santiago] Univ Los Andes, Lab Bot & Sistemat, Bogota, Colombia.
[Zavada, Michael] Seton Hall Univ, Dept Biol, S Orange, NJ 07079 USA.
RP Jaramillo, CA (reprint author), Smithsonian Trop Res Inst, Roosvelt Ave,Tupper Bldg 401, Ancon, Panama.
EM jaramilloc@si.edu
RI Madrinan, Santiago/A-1149-2010
OI Madrinan, Santiago/0000-0002-0807-6523
FU Smithsonian Paleobiology Endowment Fund; Unrestricted Endowments SI
Grants; University of Yale; Smithsonian Tropical Research Institute
FX The authors thank James Doyle (University of California, Davis) for
detailed reviews of several versions of this manuscript; James
Richardson (Royal Botanic Garden, Edinburgh) and Alexandre Antonelli
(Gothenburg Botanic Garden) for valuable comments; Fabio Gonzales
(Universidad Nacional de Colombia, Bogota), Fabiany Herrera (STRI),
Monica Carvalho (STRI) and Silane da Silva (INPA) for sending samples;
the herbaria COL, US, MO, PMA, COAH and INPA for providing samples;
Hong-Zhi Kong for providing the dated phylogeny of Chloranthaceae; and
Mayandi Sivaguru, Alejandra Restrepo and Surangi Punyasena from the
University of Illinois, Urbana, and I. Romero, for sharing photographs
of fossil pollen samples. This project was supported by the Smithsonian
Paleobiology Endowment Fund, the Unrestricted Endowments SI Grants, the
University of Yale Edward P. Bass Distinguished Visiting Environmental
Scholar, and a Short Term Fellowship from the Smithsonian Tropical
Research Institute.
NR 75
TC 5
Z9 5
U1 1
U2 17
PU TAYLOR & FRANCIS AS
PI OSLO
PA KARL JOHANS GATE 5, NO-0154 OSLO, NORWAY
SN 0017-3134
J9 GRANA
JI Grana
PD SEP 1
PY 2013
VL 52
IS 3
BP 161
EP 180
DI 10.1080/00173134.2012.760646
PG 20
WC Plant Sciences
SC Plant Sciences
GA 205VY
UT WOS:000323474100001
ER
PT J
AU Merrill, RM
Naisbit, RE
Mallet, J
Jiggins, CD
AF Merrill, R. M.
Naisbit, R. E.
Mallet, J.
Jiggins, C. D.
TI Ecological and genetic factors influencing the transition between
host-use strategies in sympatric Heliconius butterflies
SO JOURNAL OF EVOLUTIONARY BIOLOGY
LA English
DT Article
DE coexistence; genetic linkage; host-plant use; Lepidoptera; speciation
ID PASSION-VINE BUTTERFLIES; ENEMY-FREE-SPACE; REPRODUCTIVE ISOLATION;
PLANT SPECIALIZATION; ADAPTIVE RADIATION; HYBRID STERILITY; SEXUAL
SELECTION; WARNING-COLOR; SPECIATION; EVOLUTION
AB Shifts in host-plant use by phytophagous insects have played a central role in their diversification. Evolving host-use strategies will reflect a trade-off between selection pressures. The ecological niche of herbivorous insects is partitioned along several dimensions, and if populations remain in contact, recombination will break down associations between relevant loci. As such, genetic architecture can profoundly affect the coordinated divergence of traits and subsequently the ability to exploit novel habitats. The closely related species Heliconius cydno and H.melpomene differ in mimetic colour pattern, habitat and host-plant use. We investigate the selection pressures and genetic basis underlying host-use differences in these two species. Host-plant surveys reveal that H.melpomene specializes on a single species of Passiflora. This is also true for the majority of other Heliconius species in secondary growth forest at our study site, as expected under a model of interspecific competition. In contrast, H.cydno, which uses closed-forest habitats where both Heliconius and Passiflora are less common, appears not to be restricted by competition and uses a broad selection of the available Passiflora. However, other selection pressures are likely involved, and field experiments reveal that early larval survival of both butterfly species is highest on Passiflora menispermifolia, but most markedly so for H.melpomene, the specialist on that host. Finally, we demonstrate an association between host-plant acceptance and colour pattern amongst interspecific hybrids, suggesting that major loci underlying these important ecological traits are physically linked in the genome. Together, our results reveal ecological and genetic associations between shifts in habitat, host use and mimetic colour pattern that have likely facilitated both speciation and coexistence.
C1 [Merrill, R. M.; Jiggins, C. D.] Univ Cambridge, Dept Zool, Cambridge CB2 1ST, England.
[Merrill, R. M.] Smithsonian Trop Res Inst, Balboa, Panama.
[Naisbit, R. E.] Univ Fribourg, Dept Biol, CH-1700 Fribourg, Switzerland.
[Mallet, J.] Harvard Univ, Dept Organism & Evolutionary Biol, Cambridge, MA 02138 USA.
RP Merrill, RM (reprint author), Univ Cambridge, Dept Zool, Cambridge CB2 1ST, England.
EM r.merrill@zoo.cam.ac.uk
RI Naisbit, Russell/B-9658-2011; Jiggins, Chris/B-9960-2008; mallet,
james/B-5114-2008
OI Naisbit, Russell/0000-0003-0190-9323; Jiggins,
Chris/0000-0002-7809-062X;
FU Smithsonian Tropical Research Institute; Junior Research Fellowship at
King's College, Cambridge; BBSRC; Swiss National Science Foundation;
Leverhulme Trust; NERC
FX We are grateful to Moises Abanto and Timothy Thurman for help in the
insectaries. We thank the Smithsonian Tropical Research Institute for
support and the Ministerio del Ambiente for permission to collect
butterflies in Panama. RMM is supported by a Junior Research Fellowship
at King's College, Cambridge, and REN was supported by a studentship
from the BBSRC and by the Swiss National Science Foundation. We also
thank the BBSRC and Leverhulme Trust for funding awarded to CDJ and the
BBSRC and NERC for funding awarded to JM.
NR 68
TC 7
Z9 7
U1 6
U2 72
PU WILEY-BLACKWELL
PI HOBOKEN
PA 111 RIVER ST, HOBOKEN 07030-5774, NJ USA
SN 1010-061X
J9 J EVOLUTION BIOL
JI J. Evol. Biol.
PD SEP
PY 2013
VL 26
IS 9
BP 1959
EP 1967
DI 10.1111/jeb.12194
PG 9
WC Ecology; Evolutionary Biology; Genetics & Heredity
SC Environmental Sciences & Ecology; Evolutionary Biology; Genetics &
Heredity
GA 203TQ
UT WOS:000323316800011
PM 23961921
ER
PT J
AU Wirshing, HH
Feldheim, KA
Baker, AC
AF Wirshing, Herman H.
Feldheim, Kevin A.
Baker, Andrew C.
TI Vectored dispersal of Symbiodinium by larvae of a Caribbean gorgonian
octocoral
SO MOLECULAR ECOLOGY
LA English
DT Article
DE Caribbean; dispersal; octocoral; population genetics; specificity;
Symbiodinium
ID POPULATION GENETIC-STRUCTURE; MULTILOCUS GENOTYPE DATA; SEA FAN CORAL;
FLORIDA-KEYS; ALGAL SYMBIOSIS; PSEUDOPTEROGORGIA-ELISABETHAE; MARINE
POPULATIONS; GENUS SYMBIODINIUM; ALLELE FREQUENCIES; CONNECTIVITY
AB The ability of coral reefs to recover from natural and anthropogenic disturbance is difficult to predict, in part due to uncertainty regarding the dispersal capabilities and connectivity of their reef inhabitants. We developed microsatellite markers for the broadcast spawning gorgonian octocoral Eunicea (Plexaura) flexuosa (four markers) and its dinoflagellate symbiont, Symbiodinium B1 (five markers), and used them to assess genetic connectivity, specificity and directionality of gene flow among sites in Florida, Panama, Saba and the Dominican Republic. Bayesian analyses found that most E. flexuosa from the Florida reef tract, Saba and the Dominican Republic were strongly differentiated from many E. flexuosa in Panama, with the exception of five colonies from Key West that clustered with colonies from Panama. In contrast, Symbiodinium B1 was more highly structured. At least seven populations were detected that showed patterns of isolation by distance. The symbionts in the five unusual Key West colonies also clustered with symbionts from Panama, suggesting these colonies are the result of long-distance dispersal. Migration rate tests indicated a weak signal of northward immigration from the Panama population into the lower Florida Keys. As E. flexuosa clonemates only rarely associated with the same Symbiodinium B1 genotype (and vice versa), these data suggest a dynamic host-symbiont relationship in which E. flexuosa is relatively well dispersed but likely acquires Symbiodinium B1 from highly structured natal areas prior to dispersal. Once vectored by host larvae, these symbionts may then spread through the local population, and/or host colonies may acquire different local symbiont genotypes over time.
C1 [Wirshing, Herman H.; Baker, Andrew C.] Univ Miami, Rosenstiel Sch Marine & Atmospher Sci, Div Marine Biol & Fisheries, Miami, FL 33149 USA.
[Feldheim, Kevin A.] Field Museum Nat Hist, Pritzker Lab Mol Systemat & Evolut, Chicago, IL 60605 USA.
RP Wirshing, HH (reprint author), Smithsonian Inst, Natl Museum Nat Hist, Dept Invertebrate Zool, Washington, DC 20560 USA.
EM wirshingh@si.edu
RI Johnson, Selena/K-3541-2013
FU Pritzker Foundation; University of Miami's Rosenstiel School
FX Special thanks to S. Gray, L. Krimsky, S. Manley, J. Sanchez and P.
Etnoyer for their assistance in the field and boat captaining. K.
Darois, K. Lynch and H. Tieslink contributed invaluable support in the
laboratory. D. Crawford and A. Wilson provided indispensible advice and
suggestions on early drafts of the manuscript. Microsatellite enrichment
was carried out in the Pritzker Laboratory for Molecular Systematics and
Evolution operated with support from the Pritzker Foundation. This work
was partially funded by Knight and Rowlands Fellowships at the
University of Miami's Rosenstiel School.
NR 96
TC 6
Z9 6
U1 1
U2 29
PU WILEY-BLACKWELL
PI HOBOKEN
PA 111 RIVER ST, HOBOKEN 07030-5774, NJ USA
SN 0962-1083
J9 MOL ECOL
JI Mol. Ecol.
PD SEP
PY 2013
VL 22
IS 17
BP 4413
EP 4432
DI 10.1111/mec.12405
PG 20
WC Biochemistry & Molecular Biology; Ecology; Evolutionary Biology
SC Biochemistry & Molecular Biology; Environmental Sciences & Ecology;
Evolutionary Biology
GA 206GI
UT WOS:000323506400006
PM 23980762
ER
PT J
AU Hurt, C
Silliman, K
Anker, A
Knowlton, N
AF Hurt, C.
Silliman, K.
Anker, A.
Knowlton, N.
TI Ecological speciation in anemone-associated snapping shrimps (Alpheus
armatus species complex)
SO MOLECULAR ECOLOGY
LA English
DT Article
DE Alpheus; Brazil; Caribbean; host-shift; isolation migration; sea
anemone; symbiosis; sympatric speciation
ID GENUS ALPHEUS; REPRODUCTIVE ISOLATION; PHYLOGENETIC EVIDENCE;
BARTHOLOMEA-ANNULATA; POPULATION-GENETICS; HOST-SPECIFICITY; SEA;
PANAMA; ISTHMUS; CORAL
AB Divergent natural selection driven by competition for limited resources can promote speciation, even in the presence of gene flow. Reproductive isolation is more likely to result from divergent selection when the partitioned resource is closely linked to mating. Obligate symbiosis and host fidelity (mating on or near the host) can provide this link, creating ideal conditions for speciation in the absence of physical barriers to dispersal. Symbiotic organisms often experience competition for hosts, and host fidelity ensures that divergent selection for a specific host or host habitat can lead to speciation and strengthen pre-existing reproductive barriers. Here, we present evidence that diversification of a sympatric species complex occurred despite the potential for gene flow and that partitioning of host resources (both by species and by host habitat) has contributed to this diversification. Four species of snapping shrimps (Alpheus armatus, A. immaculatus, A. polystictus and A. roquensis) are distributed mainly sympatrically in the Caribbean, while the fifth species (A. rudolphi) is restricted to Brazil. All five species are obligate commensals of sea anemones with a high degree of fidelity and ecological specificity for host species and habitat. We analysed sequence data from 10 nuclear genes and the mitochondrial COI gene in 11-16 individuals from each of the Caribbean taxa and from the only available specimen of the Brazilian taxon. Phylogenetic analyses support morphology-based species assignments and a well-supported Caribbean clade. The Brazilian A. rudolphi is recovered as an outgroup to the Caribbean taxa. Isolation-migration coalescent analysis provides evidence for historical gene flow among sympatric sister species. Our data suggest that both selection for a novel host and selection for host microhabitat may have promoted diversification of this complex despite gene flow.
C1 [Hurt, C.; Silliman, K.] Univ Miami, Cox Sci Ctr, Miami, FL 33146 USA.
[Anker, A.] Univ Fed Ceara, Inst Ciencias Mar Labomar, BR-60165081 Fortaleza, Ceara, Brazil.
[Knowlton, N.] Smithsonian Inst, Natl Museum Nat Hist, Dept Invertebrate Zool, Washington, DC 20013 USA.
[Knowlton, N.] Univ Calif San Diego, Scripps Inst Oceanog, Ctr Marine Biodivers & Conservat, San Diego, CA 92093 USA.
RP Hurt, C (reprint author), Tennessee Technol Univ, Pennebaker Hall, Cookeville, TN 38505 USA.
EM hurtc@bio.miami.edu
FU CAPES of the Brazilian Government
FX We are grateful to Kristen Hultgren (University of Seattle) and Jane
Indorf (University of Miami) who reviewed the manuscript and made a
number of useful suggestions and corrections. Paulo P.G. Pachelle
(Universidade Federal do Ceara) provided a very valuable specimen of A.
rudolphi. Additional photographs were kindly provided by Frederic
Fasquel (Fig. 1D,E) and Marcio Lisa (Fig. 1F). One of the authors (AA)
was supported by CAPES of the Brazilian Government in the form of a
postdoctoral fellowship.
NR 63
TC 5
Z9 6
U1 5
U2 77
PU WILEY-BLACKWELL
PI HOBOKEN
PA 111 RIVER ST, HOBOKEN 07030-5774, NJ USA
SN 0962-1083
EI 1365-294X
J9 MOL ECOL
JI Mol. Ecol.
PD SEP
PY 2013
VL 22
IS 17
BP 4532
EP 4548
DI 10.1111/mec.12398
PG 17
WC Biochemistry & Molecular Biology; Ecology; Evolutionary Biology
SC Biochemistry & Molecular Biology; Environmental Sciences & Ecology;
Evolutionary Biology
GA 206GI
UT WOS:000323506400014
PM 23859595
ER
PT J
AU Geller, J
Meyer, C
Parker, M
Hawk, H
AF Geller, J.
Meyer, C.
Parker, M.
Hawk, H.
TI Redesign of PCR primers for mitochondrial cytochrome c oxidase subunit I
for marine invertebrates and application in all-taxa biotic surveys
SO MOLECULAR ECOLOGY RESOURCES
LA English
DT Article
DE biotic surveys; cytochrome c oxidase subunit I; DNA barcoding; Moorea;
universal primers
ID DNA; BARCODE; LIFE; SEQUENCES; PATTERNS
AB DNA barcoding is a powerful tool for species detection, identification and discovery. Metazoan DNA barcoding is primarily based upon a specific region of the cytochrome c oxidase subunit I gene that is PCR amplified by primers HCO2198 and LCO1490 (Folmer primers') designed by Folmer etal. (Molecular Marine Biology and Biotechnology, 3, 1994, 294). Analysis of sequences published since 1994 has revealed mismatches in the Folmer primers to many metazoans. These sequences also show that an extremely high level of degeneracy would be necessary in updated Folmer primers to maintain broad taxonomic utility. In primers jgHCO2198 and jgLCO1490, we replaced most fully degenerated sites with inosine nucleotides that complement all four natural nucleotides and modified other sites to better match major marine invertebrate groups. The modified primers were used to amplify and sequence cytochrome c oxidase subunit I from 9105 specimens from Moorea, French Polynesia and San Francisco Bay, California, USA representing 23 phyla, 42 classes and 121 orders. The new primers, jgHCO2198 and jgLCO1490, are well suited for routine DNA barcoding, all-taxon surveys and metazoan metagenomics.
C1 [Geller, J.; Hawk, H.] Moss Landing Marine Labs, Moss Landing, CA 95309 USA.
[Meyer, C.; Parker, M.] Smithsonian Inst, Natl Museum Nat Hist, Dept Invertebrate Zool, Washington, DC 20013 USA.
RP Geller, J (reprint author), Moss Landing Marine Labs, 8272 Moss Landing Rd, Moss Landing, CA 95309 USA.
EM geller@mlml.calstate.edu
FU California Department of Fish and Wildlife (San Francisco); Gordon and
Betty Moore Foundation (Moorea)
FX This work was supported by the California Department of Fish and
Wildlife (San Francisco) and the Gordon and Betty Moore Foundation
(Moorea). The Smithsonian Environmental Research Center Marine Invasions
Laboratory made specimen collections in San Francisco Bay, and we
particularly thank Gail Ashton, Christopher Brown, Tracy Campbell, Linda
McCann and Greg Ruiz. Michelle Marraffini, Kristin Meagher and Gillian
Rhett provided additional laboratory and computer assistance at MLML. We
also acknowledge a multitude of Moorea Biocode Project participants for
their field and collections efforts. Comments by two reviewers
significantly improved our manuscript.
NR 19
TC 82
Z9 83
U1 6
U2 86
PU WILEY-BLACKWELL
PI HOBOKEN
PA 111 RIVER ST, HOBOKEN 07030-5774, NJ USA
SN 1755-098X
J9 MOL ECOL RESOUR
JI Mol. Ecol. Resour.
PD SEP
PY 2013
VL 13
IS 5
BP 851
EP 861
DI 10.1111/1755-0998.12138
PG 11
WC Biochemistry & Molecular Biology; Ecology; Evolutionary Biology
SC Biochemistry & Molecular Biology; Environmental Sciences & Ecology;
Evolutionary Biology
GA 198WK
UT WOS:000322953400010
PM 23848937
ER
PT J
AU Betancur, R
Li, CH
Munroe, TA
Ballesteros, JA
Orti, G
AF Betancur-R., Ricardo
Li, Chenhong
Munroe, Thomas A.
Ballesteros, Jesus A.
Orti, Guillermo
TI Addressing Gene Tree Discordance and Non-Stationarity to Resolve a
Multi-Locus Phylogeny of the Flatfishes (Teleostei: Pleuronectiformes)
SO SYSTEMATIC BIOLOGY
LA English
DT Article
DE Base compositional bias; Carangimorphariae; compositional attraction;
concatenation; gene tree-species tree; multi-locus data set;
non-homogeneous models; non-stationarity; Pleuronectiformes; systematic
error
ID BEETLE MITOCHONDRIAL PHYLOGENOMICS; RAY-FINNED FISH; MAXIMUM-LIKELIHOOD;
COMPOSITIONAL HETEROGENEITY; SEQUENCE EVOLUTION; SPECIES TREES; DNA
SEQUENCES; ULTRACONSERVED ELEMENTS; MOLECULAR SYSTEMATICS; PROTEIN
EVOLUTION
AB Non-homogeneous processes and, in particular, base compositional non-stationarity have long been recognized as a critical source of systematic error. But only a small fraction of current molecular systematic studies methodically examine and effectively account for the potentially confounding effect of non-stationarity. The problem is especially overlooked in multi-locus or phylogenomic scale analyses, in part because no efficient tools exist to accommodate base composition heterogeneity in large data sets. We present a detailed analysis of a data set with 20 genes and 214 taxa to study the phylogeny of flatfishes (Pleuronectiformes) and their position among percomorphs. Most genes vary significantly in base composition among taxa and fail to resolve flatfish monophyly and other emblematic groups, suggesting that non-stationarity may be causing systematic error. We show a strong association between base compositional bias and topological discordance among individual gene partitions and their inferred trees. Phylogenetic methods applying non-homogeneous models to accommodate non-stationarity have relatively minor effect to reduce gene tree discordance, suggesting that available computer programs applying these methods do not scale up efficiently to the data set of modest size analysed in this study. By comparing phylogenetic trees obtained with species tree (STAR) and concatenation approaches, we show that gene tree discordance in our data set is most likely due to base compositional biases than to incomplete lineage sorting. Multi-locus analyses suggest that the combined phylogenetic signal from all loci in a concatenated data set overcomes systematic biases induced by non-stationarity at each partition. Finally, relationships among flatfishes and their relatives are discussed in the light of these results. We find support for the monophyly of flatfishes and confirm findings from previous molecular phylogenetic studies suggesting their close affinity with several carangimorph groups (i.e., jack and allies, barracuda, archerfish, billfish and swordfish, threadfin, moonfish, beach salmon, and snook and barramundi).
C1 [Betancur-R., Ricardo; Ballesteros, Jesus A.; Orti, Guillermo] George Washington Univ, Dept Biol Sci, Washington, DC 20052 USA.
[Li, Chenhong] Shanghai Ocean Univ, Coll Fisheries & Life Sci, Shanghai 201306, Peoples R China.
[Munroe, Thomas A.] NOAA, Natl Systemat Lab NMFS, Smithsonian Inst NHB, Washington, DC 20013 USA.
RP Orti, G (reprint author), George Washington Univ, Dept Biol Sci, 2023 G St NW, Washington, DC 20052 USA.
EM gorti@gwu.edu
FU GWU Selective Excellence in Diversity of Life program; National Science
Foundation [DEB-1004765]
FX This research was partially funded by GWU Selective Excellence in
Diversity of Life program (to R.B.R.); and the National Science
Foundation [grant DEB-1004765 (Euteleost Tree of Life) to G.O. and
C.L.].
NR 117
TC 31
Z9 32
U1 5
U2 55
PU OXFORD UNIV PRESS
PI OXFORD
PA GREAT CLARENDON ST, OXFORD OX2 6DP, ENGLAND
SN 1063-5157
EI 1076-836X
J9 SYST BIOL
JI Syst. Biol.
PD SEP
PY 2013
VL 62
IS 5
BP 763
EP 785
DI 10.1093/sysbio/syt039
PG 23
WC Evolutionary Biology
SC Evolutionary Biology
GA 203MO
UT WOS:000323297500009
PM 23749787
ER
PT J
AU Garcia-Robledo, C
Kuprewicz, EK
Staines, CL
Kress, WJ
Erwin, TL
AF Garcia-Robledo, Carlos
Kuprewicz, Erin K.
Staines, Charles L.
Kress, W. John
Erwin, Terry L.
TI Using a comprehensive DNA barcode library to detect novel egg and larval
host plant associations in a Cephaloleia rolled-leaf beetle (Coleoptera:
Chrysomelidae)
SO BIOLOGICAL JOURNAL OF THE LINNEAN SOCIETY
LA English
DT Article
DE Bromeliaceae; Cephaloleia histrionica; COI; herbivory; mitochondrial
DNA; Pitcairnia arcuata; Zingiberales
ID INSECT HERBIVORES; SPECIES IDENTIFICATION; CASSIDINAE; GENERALIST;
SPECIALIST; SUCCESS; GINGERS; ADULTS
AB To fully understand the ecology and evolution of plant-herbivore interactions, information regarding the life history of both immature and adult insect stages is essential. However, most knowledge of plant-herbivore associations is derived from observations of adults. One reason for this bias is that species identification of immature stages is usually challenging. DNA barcodes can be used to identify immature stages to the species level. This technique compares short sequences of the appropriate DNA barcode loci [e.g. mitochondrial cytochrome c oxidase subunit I (COI) gene for insects] of an unidentified specimen with a known DNA barcode library. The accuracy of DNA-based identifications depends on the comprehensiveness of the DNA barcode library. We generated a comprehensive DNA barcode library for a community of rolled-leaf beetles (Coleoptera: Chrysomelidae) in a premontane tropical forest in Costa Rica. The DNA barcode COI accurately identified all beetle species included in the study. Using this DNA barcode library, we identified eggs and larvae of Cephaloleia histrionicaBaly with 100% confidence. This new record of C.histrionica is unique in that this species completes its life cycle on a bromeliad, whereas most Cephaloleia species are associated with plants from the order Zingiberales. The life cycle, diet breadth, immature stages, and sexual dimorphism are described for C.histrionica.(c) 2013 The Linnean Society of London, Biological Journal of the Linnean Society, 2013, 110, 189-198.
C1 [Garcia-Robledo, Carlos; Staines, Charles L.; Erwin, Terry L.] Smithsonian Inst, Natl Museum Nat Hist, Dept Entomol, Washington, DC 20560 USA.
[Garcia-Robledo, Carlos; Kuprewicz, Erin K.; Kress, W. John] Smithsonian Inst, Natl Museum Nat Hist, Dept Bot, Washington, DC 20560 USA.
[Kuprewicz, Erin K.] Duke Univ, Org Trop Studies, Durham, NC 27708 USA.
RP Garcia-Robledo, C (reprint author), Smithsonian Inst, Natl Museum Nat Hist, Dept Entomol, Washington, DC 20560 USA.
EM garciac@si.edu
FU Smithsonian Postdoctoral Fellowship; National Geographic-Waitt Institute
[W149-11]; Heliconia Society International; Rubenstein Fellowship -
Encyclopedia of Life
FX The authors thank the staff of Selva Tica-Rara Avis Reserves, I. Lopez
(Smithsonian Institution) and J. Hurtado (TEAM project Barva Transect,
Conservation International) for logistical support. We thank S. Nagi and
D. Erickson (Smithsonian Institution) for assistance during the
laboratory work. S. Whittaker (Smithsonian Institution) provided advice
with respect to obtaining SEM images. Comments by Hugh Loxdale and an
anonymous reviewer improved the manuscript substantially. This research
was funded by a Smithsonian Postdoctoral Fellowship, a National
Geographic-Waitt Institute grant (W149-11), a Heliconia Society
International grant, and a Rubenstein Fellowship - Encyclopedia of Life
to C.G.
NR 36
TC 9
Z9 9
U1 3
U2 39
PU WILEY-BLACKWELL
PI HOBOKEN
PA 111 RIVER ST, HOBOKEN 07030-5774, NJ USA
SN 0024-4066
EI 1095-8312
J9 BIOL J LINN SOC
JI Biol. J. Linnean Soc.
PD SEP
PY 2013
VL 110
IS 1
BP 189
EP 198
DI 10.1111/bij.12115
PG 10
WC Evolutionary Biology
SC Evolutionary Biology
GA 200BF
UT WOS:000323040200014
ER
PT J
AU Olson, SL
Hearty, PJ
AF Olson, Storrs L.
Hearty, Paul J.
TI Periodicity of extinction and recolonization of the West Indian topshell
Cittarium pica in the Quaternary of Bermuda (Gastropoda: Trochoidea)
SO BIOLOGICAL JOURNAL OF THE LINNEAN SOCIETY
LA English
DT Article
DE Coenobita clypeatus; Gulf Stream velocity; hermit crabs; larval
transportation; marine istotope stages 1-11; paleoceanography
ID ATLANTIC THERMOHALINE CIRCULATION; LAST INTERGLACIAL PERIOD; SEA-LEVEL
HIGHSTAND; NORTH-ATLANTIC; COENOBITA-CLYPEATUS; LATE PLEISTOCENE;
IBERIAN MARGIN; HERMIT-CRAB; GULF-STREAM; BAHAMAS
AB Hermit-crab transported shells of the West Indian top shell Cittarium pica occur in numerous terrestrial fossil deposits on Bermuda, which is the most remote outpost of this Caribbean species. Cittarium is so far known only from deposits of interglacial ages corresponding to marine isotope stages (MIS) 11, 9, 5e, and 1 (Holocene). In at least the cases of MIS 11 and 5e, Cittarium appears at the very beginning of the interglacial. The species is definitely absent from well-stratified cave deposits of the last glacial (MIS 4-2). It is hypothesized that colder sea-surface temperatures (SSTs) during glacial periods caused Cittarium to be extirpated on Bermuda, and that it has made at least four independent colonizations of the island in the past 400000 years. Because of the limited larval life of Cittarium, the window for colonization may be a very narrow period at the onset of interglacials when the SST has risen sufficiently to make Bermuda habitable but the velocity of the Gulf Stream is still sufficiently rapid to transport viable larvae from the Bahamas.(c) 2013 The Linnean Society of London, Biological Journal of the Linnean Society, 2013, 110, 235-243.
C1 [Olson, Storrs L.] Smithsonian Inst, Natl Museum Nat Hist, Dept Vertebrate Zool, Washington, DC 20560 USA.
[Hearty, Paul J.] Univ N Carolina, Dept Environm Studies, Wilmington, NC 28403 USA.
RP Olson, SL (reprint author), Smithsonian Inst, Natl Museum Nat Hist, Dept Vertebrate Zool, Washington, DC 20560 USA.
EM olsons@si.edu
NR 62
TC 2
Z9 2
U1 0
U2 14
PU WILEY-BLACKWELL
PI HOBOKEN
PA 111 RIVER ST, HOBOKEN 07030-5774, NJ USA
SN 0024-4066
EI 1095-8312
J9 BIOL J LINN SOC
JI Biol. J. Linnean Soc.
PD SEP
PY 2013
VL 110
IS 1
BP 235
EP 243
DI 10.1111/bij.12119
PG 9
WC Evolutionary Biology
SC Evolutionary Biology
GA 200BF
UT WOS:000323040200018
ER
PT J
AU Patrick, CJ
AF Patrick, Christopher J.
TI The effect of shredder community composition on the production and
quality of fine particulate organic matter
SO FRESHWATER SCIENCE
LA English
DT Article
DE leaf decomposition; particle production; FPOM; shredder; processing
chain ecology; biodiversity
ID HYDROPSYCHE-SPARNA TRICHOPTERA; LEAF-LITTER; STREAM DETRITIVORE;
ECOSYSTEM FUNCTION; FOREST STREAM; CELLULOSE DIGESTION; HEADWATER
STREAMS; CURRENT KNOWLEDGE; FECAL PELLETS; INSECT FECES
AB Decomposition of senesced primary production starts processing chains in aquatic systems. Shredding macroinvertebrates convert coarse particulate organic matter (CPOM) to fine particulate organic matter (FPOM) that supports 2 other feeding groups, collecting and filtering macroinvertebrates. This linkage is often invoked by aquatic ecologists, but the effect of detritivore assemblage composition on production of FPOM is relatively understudied. I manipulated detritivore assemblage composition (Limnephilus sp., Caecidotea sp., and Hyalella azteca) in aquatic mesocosms stocked with green speckled alder leaves (Alnus incana rugosa). I measured production rate, size distribution, and stoichiometry of FPOM produced through time. Detritivore species richness had a positive effect on FPOM production resulting from inclusion of the functionally dominant shredder, Limnephilus sp., in mixed-species treatments (e. g., sampling effect). Mixed-species treatments had significantly faster particle production than predicted from single-species treatments. The significant increases in particle production in mixed-species treatments could have resulted from release of Limnephilus sp. from intraspecific competition, facilitation between shredders, or both processes. FPOM size distribution and C:N varied significantly among treatments and was affected by species interactions in mixed-species treatments. The presence of Limnephilus sp. significantly skewed the FPOM size distribution and increased the mass of particles >250 mu m by similar to 60%. These results suggest that the specific shredding insects in an assemblage could strongly affect production of FPOM and the size distribution and stoichiometry of FPOM produced by the benthos of a stream.
C1 [Patrick, Christopher J.] Smithsonian Environm Res Ctr, Edgewater, MD 21037 USA.
[Patrick, Christopher J.] Univ Notre Dame, Notre Dame, IN 46656 USA.
RP Patrick, CJ (reprint author), Smithsonian Environm Res Ctr, POB 28, Edgewater, MD 21037 USA.
EM patrickc@si.edu
FU University of Notre Dame Environmental Research Center
FX Gary Belovsky, Jason McLachlan, Jennifer Tank, and Todd Crowl provided
feedback and critiques of this work through its inception and execution.
Gary Belovsky, Michael Cramer, and David Richardson provided helpful
critiques of this manuscript. Matt Barnes and Jamin Dryer helped during
the field survey. This work was funded by the University of Notre Dame
Environmental Research Center.
NR 58
TC 4
Z9 5
U1 8
U2 75
PU SOC FRESWATER SCIENCE
PI WACO
PA 5400 BOSQUE BLVD, STE 680, WACO, TX 76710 USA
SN 2161-9565
J9 FRESHW SCI
JI Freshw. Sci.
PD SEP
PY 2013
VL 32
IS 3
BP 1026
EP 1035
DI 10.1899/12-090.1
PG 10
WC Ecology; Marine & Freshwater Biology
SC Environmental Sciences & Ecology; Marine & Freshwater Biology
GA 197DB
UT WOS:000322828300024
ER
PT J
AU Verde, L
Protopapas, P
Jimenez, R
AF Verde, Licia
Protopapas, Pavlos
Jimenez, Raul
TI Planck and the local Universe: Quantifying the tension
SO PHYSICS OF THE DARK UNIVERSE
LA English
DT Article
DE Cosmology; Hubble parameter; Age of the Universe; Cosmic Microwave
Background; Bayesian methods
ID GLOBULAR-CLUSTERS; HUBBLE CONSTANT; COSMOLOGICAL PARAMETERS; AGES
AB We use the latest Planck constraints, and in particular constraints on the derived parameters (Hubble constant and age of the Universe) for the local universe and compare them with local measurements of the same quantities. We propose a way to quantify whether cosmological parameters constraints from two different experiments are in tension or not. Our statistic, T, is an evidence ratio and therefore can be interpreted with the widely used Jeffrey's scale. We find that in the framework of the Lambda CDM model, the Planck inferred two dimensional, joint, posterior distribution for the Hubble constant and age of the Universe is in "strong" tension with the local measurements; the odds being similar to 1: 50. We explore several possibilities for explaining this tension and examine the consequences both in terms of unknown errors and deviations from the Lambda CDM model. In some one-parameter Lambda CDM model extensions, tension is reduced whereas in other extensions, tension is instead increased. In particular, small total neutrino masses are favored and a total neutrino mass above 0.15 eV makes the tension "highly significant" (odds similar to 1: 150). A consequence of accepting this interpretation of the tension is that the degenerate neutrino hierarchy is highly disfavored by cosmological data and the direct hierarchy is slightly favored over the inverse. (C) 2013 The Authors. Published by Elsevier B.V.
C1 [Verde, Licia; Jimenez, Raul] Univ Barcelona, UB IEEC, ICREA, Barcelona 08034, Spain.
[Verde, Licia; Jimenez, Raul] Univ Barcelona, UB IEEC, ICC, Barcelona 08034, Spain.
[Verde, Licia; Jimenez, Raul] CERN, Dept Phys, Theory Grp, CH-1211 Geneva 23, Switzerland.
[Protopapas, Pavlos] Harvard Smithsonian Ctr Astrophys, Cambridge, MA 02138 USA.
[Protopapas, Pavlos] Harvard Univ, Sch Engn & Appl Sci, Inst Appl Computat Sci, Cambridge, MA 02138 USA.
RP Verde, L (reprint author), Univ Barcelona, UB IEEC, ICREA, Marti i Franques 1, Barcelona 08034, Spain.
EM liciaverde@gmail.com
OI Jimenez, Raul/0000-0002-3370-3103; Verde, Licia/0000-0003-2601-8770
FU European Research Council under the European Community's Seventh
Framework Programme [FP7-IDEASPhys]; Mineco grant
[FPA2011-29678-C02-02]; ESA Member States; NASA; Canada; ESA; CNES
(France); CNRS/INSU-IN2P3-INP (France); ASI (Italy); CNR (Italy); INAF
(Italy); DoE (USA); STFC (UK); UKSA (UK); CSIC (Spain); MICINN (Spain);
JA (Spain); Tekes (Finland); AoF (Finland); CSC (Finland); NASA (USA);
DLR (Germany); MPG (Germany); CSA (Canada); DTU Space (Denmark); SER/SSO
(Switzerland); RCN (Norway); SFI (Ireland); FCT/MCTES (Portugal); PRACE
(EU)
FX LV is supported by European Research Council under the European
Community's Seventh Framework Programme grant FP7-IDEASPhys. LSS. LV and
RJ acknowledge Mineco grant FPA2011-29678-C02-02. We thank Hiranya
Peiris and Arthur Kosowsky for discussions and comments on an early
version of this work. We acknowledge the use of the Legacy Archive for
Microwave Background Data Analysis (LAMBDA), part of the High Energy
Astrophysics Science Archive Center (HEASARC). HEASARC /LAMBDA is a
service of the Astrophysics Science Division at the NASA Goddard Space
Flight Center. This work is based on observations obtained with Planck
(http://www.esa.int/Planck), an ESA science mission with instruments and
contributions directly funded by ESA Member States, NASA, and Canada.
The development of Planck has been supported by: ESA; CNES and
CNRS/INSU-IN2P3-INP (France); ASI, CNR, and INAF (Italy); NASA and DoE
(USA); STFC and UKSA (UK); CSIC, MICINN and JA (Spain); Tekes, AoF and
CSC (Finland); DLR and MPG (Germany); CSA (Canada); DTU Space (Denmark);
SER/SSO (Switzerland); RCN (Norway); SFI (Ireland); FCT/MCTES
(Portugal); and PRACE (EU). We acknowledge the use of the Planck Legacy
Archive.
NR 31
TC 28
Z9 28
U1 0
U2 2
PU ELSEVIER SCIENCE BV
PI AMSTERDAM
PA PO BOX 211, 1000 AE AMSTERDAM, NETHERLANDS
SN 2212-6864
J9 PHYS DARK UNIVERSE
JI Phys. Dark Universe
PD SEP
PY 2013
VL 2
IS 3
BP 166
EP 175
DI 10.1016/j.dark.2013.09.002
PG 10
WC Astronomy & Astrophysics
SC Astronomy & Astrophysics
GA AR6NT
UT WOS:000343700800006
ER
PT J
AU Eriksson, PG
Banerjee, S
Catuneanu, O
Corcoran, PL
Eriksson, KA
Hiatt, EE
Laflamme, M
Lenhardt, N
Long, DGF
Miall, AD
Mints, MV
Pufahl, PK
Sarkar, S
Simpson, EL
Williams, GE
AF Eriksson, Patrick G.
Banerjee, Santanu
Catuneanu, Octavian
Corcoran, Patricia L.
Eriksson, Kenneth A.
Hiatt, Eric E.
Laflamme, Marc
Lenhardt, Nils
Long, Darrel G. F.
Miall, Andrew D.
Mints, Michael V.
Pufahl, Peir K.
Sarkar, Subir
Simpson, Edward L.
Williams, George E.
TI Secular changes in sedimentation systems and sequence stratigraphy
SO GONDWANA RESEARCH
LA English
DT Article
DE Fragmentary sedimentary record; Actualism; Secular change in rates and
intensities of processes; Earth mechanics; Palaeoatmospheric evolution;
Great oxidation events; Global magmatic slowdown; Glacial events;
Biological evolution; Sequence stratigraphy
ID BILLION YEARS AGO; BARBERTON GREENSTONE-BELT; PERMIAN MASS EXTINCTION;
GREAT OXIDATION EVENT; PROTEROZOIC KAIMUR FORMATION; SNOWBALL EARTH
HYPOTHESIS; LOW-LATITUDE GLACIATION; MOUNT BRUCE SUPERGROUP; BIOLOGICAL
SOIL CRUSTS; ARCHAEAN MOODIES GROUP
AB The ephemeral nature of most sedimentation processes and the fragmentary character of the sedimentary record are of first-order importance. Despite a basic uniformity of external controls on sedimentation resulting in markedly similar lithologies, facies, fades associations and depositional elements within the rock record across time, there are a number of secular changes, particularly in rates and intensities of processes that resulted in contrasts between preserved Precambrian and Phanerozoic successions. Secular change encompassed (1) variations in mantle heat, rates of plate drift and of continental crustal growth, the gravitational effects of the Moon, and in rates of weathering, erosion, transport, deposition and diagenesis; (2) a decreasing planetary rotation rate over time; (3) no vegetation in the Precambrian, but prolific microbial mats, with the opposite pertaining to the Phanerozoic; (4) the long-term evolution of the hydrosphere-atmosphere-biosphere system. A relatively abrupt and sharp turning point was reached in the Neoarchaean, with spikes in mantle plume flux and tectonothermal activity and possibly concomitant onset of the supercontinent cycle. Substantial and irreversible change occurred subsequently in the Palaeoproterozoic, whereby the dramatic change from reducing to oxidizing volcanic gases ushered in change to an oxic environment, to be followed at ca. 2.4-2.3 Ga by the "Great Oxidation Event" (GOE); rise in atmospheric oxygen was accompanied by expansion of oxygenic photosynthesis in the cyanobacteria. A possible global tectono-thermal "slowdown" from ca. 2.45-2.2 Ga may have separated a preceding plate regime which interacted with a higher energy mantle from a ca. 2.2-2.0 Ga Phanerozoic-style plate tectonic regime; the "slowdown" period also encompassed the first known global-scale glaciation and overlapped with the GOE. While large palaeodeserts emerged from ca. 2.0-1.8 Ga, possibly associated with the evolution of the supercontinent cycle, widespread euxinia by ca. 1.85 Ga ushered in the "boring billion" year period. A second time of significant and irreversible change, in the Neoproterozoic, saw a second major oxidation event and several low palaeolatitude Cryogenian (740-630 Ma) glaciations. With the veracity of the "Snowball Earth" model for Neoproterozoic glaciation being under dispute, genesis of Pre-Ediacaran low-palaeolatitude glaciation remains enigmatic. Ediacaran (635-542 Ma) glaciation with a wide palaeolatitudinal range contrasts with the circum-polar nature of Phanerozoic glaciation. The observed change from low latitude to circum-polar glaciation parallels advent and diversification of the Metazoa and the Neoproterozoic oxygenation (ca. 580 Ma), and was succeeded by the Ediacaran-Cambrian transition which ushered in biomineralization, with all its implications for the chemical sedimentary record. (C) 2012 International Association for Gondwana Research. Published by Elsevier B.V. All rights reserved.
C1 [Eriksson, Patrick G.; Lenhardt, Nils] Univ Pretoria, Dept Geol, ZA-0002 Pretoria, South Africa.
[Banerjee, Santanu] Indian Inst Technol, Dept Earth Sci, Bombay 400076, Maharashtra, India.
[Catuneanu, Octavian] Univ Alberta, Dept Earth & Atmospher Sci, Edmonton, AB T6G 2E3, Canada.
[Corcoran, Patricia L.] Univ Western Ontario, Dept Earth Sci, London, ON N6A 5B7, Canada.
[Eriksson, Kenneth A.] Virginia Tech, Dept Geol Sci, Blacksburg, VA 24061 USA.
[Hiatt, Eric E.] Univ Wisconsin, Dept Geol, Oshkosh, WI 54901 USA.
[Laflamme, Marc] Smithsonian Inst, Dept Paleobiol, Washington, DC 20013 USA.
[Long, Darrel G. F.] Laurentian Univ, Dept Earth Sci, Sudbury, ON P3E 2C6, Canada.
[Miall, Andrew D.] Univ Toronto, Dept Geol, Toronto, ON M5S 3B1, Canada.
[Mints, Michael V.] Russian Acad Sci, Inst Geol, Lab Early Precambrian Tecton, Moscow 109017, Russia.
[Pufahl, Peir K.] Acadia Univ, Dept Earth & Environm Sci, Wolfville, NS B4P 2R6, Canada.
[Sarkar, Subir] Jadavpur Univ, Dept Geol Sci, Kolkata 700032, India.
[Simpson, Edward L.] Kutztown Univ Penn, Dept Phys Sci, Kutztown, PA 19530 USA.
[Williams, George E.] Univ Adelaide, Adelaide, SA 5005, Australia.
RP Eriksson, PG (reprint author), Univ Pretoria, Dept Geol, ZA-0002 Pretoria, South Africa.
EM pat.eriksson@up.ac.za
RI Lenhardt, Nils/F-4773-2010;
OI Mints, Michael V./0000-0001-7015-6586; Hiatt, Eric/0000-0002-0004-2492;
Long, Darrel/0000-0002-1014-9090
FU National Geographic Society [6003-97]; NSERC; PetroCanada Young
Innovator Award; University of Wisconsin-Oshkosh University Research
Program Grant; Smithsonian Institution Postdoctoral Fellowship; NASA
National Astrobiology Institute Grant; University of Pretoria; National
Research Foundation of South Africa
FX Ed Simpson and Ken Eriksson acknowledge research support by the National
Geographic Society grant 6003-97, and wish to thank Mr. Nico Oosthuyzen
for permission to work in the Songimvelo game preserve and Mr. Roelf Le
Roux of Barberton Mines for aid on various aspects of their work in the
famous Barberton greenstone belt. Peir K. Pufahl, Eric E. Hiatt and Marc
Laflamme were supported by a NSERC Discovery Grant and PetroCanada Young
Innovator Award to PKP, a University of Wisconsin-Oshkosh University
Research Program Grant to EEH, a Smithsonian Institution Postdoctoral
Fellowship and NASA National Astrobiology Institute Grant to ML. Nils
Lenhard acknowledges a University of Pretoria Research Development
Program (RDP) Grant. Pat Eriksson thanks this same University, and the
National Research Foundation of South Africa for research funding, and
Thino Rajab for her drafting skills. We acknowledge two anonymous
reviewers and guest editor Tim Kusky, for their sage advice.
NR 401
TC 26
Z9 27
U1 5
U2 71
PU ELSEVIER SCIENCE BV
PI AMSTERDAM
PA PO BOX 211, 1000 AE AMSTERDAM, NETHERLANDS
SN 1342-937X
EI 1878-0571
J9 GONDWANA RES
JI Gondwana Res.
PD SEP
PY 2013
VL 24
IS 2
SI SI
BP 468
EP 489
DI 10.1016/j.gr.2012.09.008
PG 22
WC Geosciences, Multidisciplinary
SC Geology
GA 186PW
UT WOS:000322057600003
ER
PT J
AU Moffett, MW
AF Moffett, Mark W.
TI Human Identity and the Evolution of Societies
SO HUMAN NATURE-AN INTERDISCIPLINARY BIOSOCIAL PERSPECTIVE
LA English
DT Article
DE Coalitions; Fission-fusion; Hunter-gatherers; Language; Outgroups;
Nationalism; Social learning; Symbols; Tribes; Xenophobia
ID FISSION-FUSION DYNAMICS; HUMAN SOCIAL EVOLUTION; MODERN HUMAN-BEHAVIOR;
WHALES ORCINUS-ORCA; HUNTER-GATHERERS; WILD CHIMPANZEES; GROUP-SIZE;
INTERGROUP CONFLICT; MATERIAL CULTURE; NEOCORTEX SIZE
AB Human societies are examined as distinct and coherent groups. This trait is most parsimoniously considered a deeply rooted part of our ancestry rather than a recent cultural invention. Our species is the only vertebrate with society memberships of significantly more than 200. We accomplish this by using society-specific labels to identify members, in what I call an anonymous society. I propose that the human brain has evolved to permit not only the close relationships described by the social brain hypothesis, but also, at little mental cost, the anonymous societies within which such alliances are built. The human compulsion to discover or invent labels to "mark" group memberships may originally have been expressed in hominins as vocally learned greetings only slightly different in function from chimpanzee pant hoots (now known to be society-specific). The weight of evidence suggests that at some point, conceivably early in the hominin line, the distinct groups composed of several bands that were typical of our ancestors came to be distinguished by their members on the basis of multiple labels that were socially acquired in this way, the earliest of which would leave no trace in the archaeological record. Often overlooked as research subjects, these sizable fission-fusion communities, in recent egalitarian hunter-gatherers sometimes 2,000 strong, should consistently be accorded the status of societies, in the same sense that this word is used to describe tribes, chiefdoms, and other cultures arising later in our history. The capacity of hunter-gatherer societies to grow sufficiently populous that not all members necessarily recognize one another would make the transition to larger agricultural societies straightforward. Humans differ from chimpanzees in that societal labels are essential to the maintenance of societies and the processes giving birth to new ones. I propose that anonymous societies of all kinds can expand only so far as their labels can remain sufficiently stable.
C1 Smithsonian Inst, Natl Museum Nat Hist, Washington, DC 20013 USA.
RP Moffett, MW (reprint author), Smithsonian Inst, Natl Museum Nat Hist, 10th St & Constitut Ave, Washington, DC 20013 USA.
EM naturalist@erols.com
NR 386
TC 13
Z9 13
U1 7
U2 83
PU SPRINGER
PI NEW YORK
PA 233 SPRING ST, NEW YORK, NY 10013 USA
SN 1045-6767
EI 1936-4776
J9 HUM NATURE-INT BIOS
JI Hum. Nat.-Interdiscip. Biosoc. Perspect.
PD SEP
PY 2013
VL 24
IS 3
BP 219
EP 267
DI 10.1007/s12110-013-9170-3
PG 49
WC Anthropology; Social Sciences, Biomedical
SC Anthropology; Biomedical Social Sciences
GA 194UF
UT WOS:000322657500001
PM 23813244
ER
PT J
AU Zhou, Z
Hong, DY
Niu, Y
Li, GD
Nie, ZL
Wen, J
Sun, H
AF Zhou, Zhuo
Hong, Deyuan
Niu, Yang
Li, Guodong
Nie, Zelong
Wen, Jun
Sun, Hang
TI Phylogenetic and biogeographic analyses of the Sino-Himalayan endemic
genus Cyananthus (Campanulaceae) and implications for the evolution of
its sexual system
SO MOLECULAR PHYLOGENETICS AND EVOLUTION
LA English
DT Article
DE Cyananthus; Sino-Himalaya; Sexual system evolution; Phylogeny;
Biogeography
ID QINGHAI-TIBETAN PLATEAU; TRNL-F SEQUENCES; MOLECULAR PHYLOGENY;
CHLOROPLAST DNA; DELAVAYI CAMPANULACEAE; RHEUM POLYGONACEAE; GEOGRAPHIC
RANGE; ASTERACEAE; RADIATION; DIVERSIFICATION
AB Cyananthus (Campanulaceae) is a small genus consisting of ca. 20 species endemic to the Sino-Himalayan region. Based on phylogenetic analysis using nuclear ribosomal ITS and four plastid markers (matIC, rbcL, psbA-trnH and trnG-S), our results strongly support the monophyly of Cyananthus and its close relationship with the Codonopsis clade of the platycodonoids. Three major clades are supported, corresponding to the three sections of the genus, with sect. Cyananthus, which mainly occurs in the Himalayas, being a sister to the clade comprising the other two sections (sect. Stenolobi and sect. Annul) distributed primarily in the Hengduan Mountain region. We also observed that Cyananthus exhibits variation in its sexual system, possessing both hermaphroditic and gynodioecious species. Character evolution analyses using Mesquite suggest that gynodioecy evolved from hermaphroditism only once in sect. Stenolobi, but that there is a reversal in C. forrnosus. Molecular dating and biogeographic analysis with LAGRANGE support dispersal from the Himalayas to the Hengduan Mountains during the early evolution of Cyananthus. The extensive uplift of the Qinghai-Tibetan Plateau and the Hengduan Mountains played an important role in the subsequent diversification of the genus. (C) 2013 Elsevier Inc. All rights reserved.
C1 [Zhou, Zhuo; Niu, Yang; Li, Guodong; Nie, Zelong; Sun, Hang] Chinese Acad Sci, Kunming Inst Bot, Key Lab Biodivers & Biogeog, Kunming 650201, Yunnan, Peoples R China.
[Hong, Deyuan] Chinese Acad Sci, Inst Bot, State Key Lab Systemat & Evolutionary Bot, Beijing 100093, Peoples R China.
[Zhou, Zhuo; Niu, Yang; Li, Guodong] Univ Chinese Acad Sci, Beijing 100049, Peoples R China.
[Wen, Jun] Smithsonian Inst, Natl Museum Nat Hist, Dept Bot, Washington, DC 20013 USA.
RP Wen, J (reprint author), Smithsonian Inst, Natl Museum Nat Hist, Dept Bot, Washington, DC 20013 USA.
EM wenj@si.edu; hsun@mail.kib.ac.cn
RI Nie, Ze-Long/N-8471-2015
OI Nie, Ze-Long/0000-0001-8065-3981
FU National Natural Science Foundation of China (NSFC) [40930209, 31200183,
U 1136601]; Chinese Academy of Sciences [XDB03030112]; Hundred Talents
Program of the Chinese Academy of Sciences [2011312D11022]
FX The study was supported by grants-in-aid from the National Natural
Science Foundation of China (NSFC, 40930209, 31200183, U 1136601),
Strategic Priority Research Program (B) of the Chinese Academy of
Sciences (XDB03030112), Hundred Talents Program of the Chinese Academy
of Sciences (2011312D11022 to H. Sun) and the John D. and Catherine T.
MacArthur Foundation to J. Wen, R. Ree, and G. Mueller. Lab assistance
was provided by Dr. H.G. Zha in the Kunming Institute of Botany and Lee
Weigt, Jeff Hunt and Gabe Johnson at the Laboratory of Analytical
Biology of the Smith-sonian Institution. We thank X.X. Wang, B. Xu and
J.W. Zhang for help with collecting samples, and L.M. Lu for assistance
on creating graphics. We also thank Sees-editing Ltd. help for English
editing of the manuscript.
NR 108
TC 20
Z9 21
U1 4
U2 47
PU ACADEMIC PRESS INC ELSEVIER SCIENCE
PI SAN DIEGO
PA 525 B ST, STE 1900, SAN DIEGO, CA 92101-4495 USA
SN 1055-7903
J9 MOL PHYLOGENET EVOL
JI Mol. Phylogenet. Evol.
PD SEP
PY 2013
VL 68
IS 3
BP 482
EP 497
DI 10.1016/j.ympev.2013.04.027
PG 16
WC Biochemistry & Molecular Biology; Evolutionary Biology; Genetics &
Heredity
SC Biochemistry & Molecular Biology; Evolutionary Biology; Genetics &
Heredity
GA 176PG
UT WOS:000321316000010
PM 23669010
ER
PT J
AU Lu, LM
Wang, W
Chen, ZD
Wen, J
AF Lu, Limin
Wang, Wei
Chen, Zhiduan
Wen, Jun
TI Phylogeny of the non-monophyletic Cayratia Juss. (Vitaceae) and
implications for character evolution and biogeography
SO MOLECULAR PHYLOGENETICS AND EVOLUTION
LA English
DT Article
DE Cayratia; Cyphostemma; Long-distance dispersal; Out-of-Africa;
Phylogeny; Tetrastigma; Vitaceae
ID GRAPE FAMILY VITACEAE; LONG-DISTANCE DISPERSAL; OUT-OF-AFRICA; MOLECULAR
PHYLOGENY; VITIS VITACEAE; SEQUENCE DATA; HISTORICAL BIOGEOGRAPHY;
PARTHENOCISSUS VITACEAE; TROPICAL FLORAS; DNA-SEQUENCES
AB Cayratia consists of ca. 60 species primarily distributed in the tropical and subtropical regions of Asia, Australia, and Africa. It is an excellent candidate for exploring the evolution of intercontinental disjunct distributions in the Old World. Previous phylogenetic work of Vitaceae with a few species of Cayratia sampled showed that Cayratia was not monophyletic and was closely related to Cyphostemma and Tetrastigma. We herein expanded taxon sampling of Cayratia (25/60 species) with its allied genera Cyphostemma (39/150 species), Tetrastigma (27/95 species), and other related genera from Vitaceae represented, employing five plastid markers (atpB-rbcL, rps16, trnC-petN, trnH-psbA, and trnL-F), to investigate the phylogeny, character evolution and biogeography of Cayratia. The phylogenetic analyses have confirmed the monophyly of the Cayratia-Cyphostemma-Tetrastigma (CCT) clade and resolved Cayratia into three lineages: the African Cayratia clade, subg. Cayratia, and subg. Discypharia. The African Cayratia was supported as the first diverging lineage within the CCT clade and Tetrastigma is resolved as sister to subg. Discypharia. Character optimizations suggest that the presence/absence of a membrane enclosing the ventral infolds in seeds is an important character for the taxonomy of Cayratia. The presence of bracts on the lower part of the inflorescence axis is inferred to have arisen only once in Cayratia, but this character evolved several times in Tetrastigma. Both the branching pattern of tendrils and the leaf architecture are suggested as important infrageneric characters, but should be used cautiously because some states evolved multiple times. Ancestral area reconstruction and molecular dating suggest that the CCT clade originated from continental Africa in the late Cretaceous, and it then reached Asia twice independently in the late Cretaceous and late Oligocene, respectively. Several dispersals are inferred from Asia to Australia since the Eocene. (C) 2013 Elsevier Inc. All rights reserved.
C1 [Lu, Limin; Wang, Wei; Chen, Zhiduan] Chinese Acad Sci, Inst Bot, State Key Lab Systemat & Evolutionary Bot, Beijing 100093, Peoples R China.
[Lu, Limin] Chinese Acad Sci, Grad Sch, Beijing 100049, Peoples R China.
[Wen, Jun] Smithsonian Inst, Natl Museum Nat Hist, Dept Bot, MRC166, Washington, DC 20013 USA.
RP Chen, ZD (reprint author), Chinese Acad Sci, Inst Bot, State Key Lab Systemat & Evolutionary Bot, Beijing 100093, Peoples R China.
EM zhiduan@ibcas.ac.cn; wenj@si.edu
FU US National Science Foundation [DEB 0743474]; National Museum of Natural
History, the Smithsonian Institution; Laboratory of Analytical Biology
of the National Museum of Natural History, the Smithsonian Institution
FX This study was supported by the US National Science Foundation (Grant
DEB 0743474 to S.R. Manchester and J. Wen), and the Small Grants Program
of the National Museum of Natural History, the Smithsonian Institution.
We are grateful to Miao Sun for collecting seed materials from the PE
herbarium, Zelong Nie for assistance in data analyses, and Robert
Kiapranis, Michael Lovave, Thomas Magun, Quentin Luke, Elizabeth
Widjaja, Leng-guan Saw, Tingshuang Yi, and Marc Appelhans for field
assistance and/or sample collection. We also thank Minqing Zou for
sequencing two important species during the revision of the manuscript.
Laboratory work was done at and partially supported by the Laboratory of
Analytical Biology of the National Museum of Natural History, the
Smithsonian Institution.
NR 100
TC 14
Z9 15
U1 3
U2 42
PU ACADEMIC PRESS INC ELSEVIER SCIENCE
PI SAN DIEGO
PA 525 B ST, STE 1900, SAN DIEGO, CA 92101-4495 USA
SN 1055-7903
EI 1095-9513
J9 MOL PHYLOGENET EVOL
JI Mol. Phylogenet. Evol.
PD SEP
PY 2013
VL 68
IS 3
BP 502
EP 515
DI 10.1016/j.ympev.2013.04.023
PG 14
WC Biochemistry & Molecular Biology; Evolutionary Biology; Genetics &
Heredity
SC Biochemistry & Molecular Biology; Evolutionary Biology; Genetics &
Heredity
GA 176PG
UT WOS:000321316000012
PM 23669013
ER
PT J
AU Meyer, KA
Mackay, DH
van Ballegooijen, AA
Parnell, CE
AF Meyer, K. A.
Mackay, D. H.
van Ballegooijen, A. A.
Parnell, C. E.
TI Solar Magnetic Carpet III: Coronal Modelling of Synthetic Magnetograms
SO SOLAR PHYSICS
LA English
DT Article
DE Sun: magnetic fields; Sun: magnetic carpet
ID QUIET-SUN; LOOP OSCILLATIONS; BRIGHT POINTS; TRANSVERSE OSCILLATIONS;
VELOCITY FIELDS; RECONNECTION; EVOLUTION; INTRANETWORK; NETWORK;
CHROMOSPHERE
AB This article is the third in a series working towards the construction of a realistic, evolving, non-linear force-free coronal-field model for the solar magnetic carpet. Here, we present preliminary results of 3D time-dependent simulations of the small-scale coronal field of the magnetic carpet. Four simulations are considered, each with the same evolving photospheric boundary condition: a 48-hour time series of synthetic magnetograms produced from the model of Meyer et al. (Solar Phys. 272, 29, 2011). Three simulations include a uniform, overlying coronal magnetic field of differing strength, the fourth simulation includes no overlying field. The build-up, storage, and dissipation of magnetic energy within the simulations is studied. In particular, we study their dependence upon the evolution of the photospheric magnetic field and the strength of the overlying coronal field. We also consider where energy is stored and dissipated within the coronal field. The free magnetic energy built up is found to be more than sufficient to power small-scale, transient phenomena such as nanoflares and X-ray bright points, with the bulk of the free energy found to be stored low down, between 0.5 -aEuro parts per thousand 0.8 Mm. The energy dissipated is currently found to be too small to account for the heating of the entire quiet-Sun corona. However, the form and location of energy-dissipation regions qualitatively agree with what is observed on small scales on the Sun. Future MHD modelling using the same synthetic magnetograms may lead to a higher energy release.
C1 [Meyer, K. A.; Mackay, D. H.; Parnell, C. E.] Univ St Andrews, Sch Math & Stat, St Andrews KY16 9SS, Fife, Scotland.
[van Ballegooijen, A. A.] Harvard Smithsonian Ctr Astrophys, Cambridge, MA 02138 USA.
RP Meyer, KA (reprint author), Univ St Andrews, Sch Math & Stat, St Andrews KY16 9SS, Fife, Scotland.
EM karen@mcs.st-and.ac.uk
OI van Ballegooijen, Adriaan/0000-0002-5622-3540
FU Leverhulme Trust; STFC; Royal Society; EU
FX KAM and DHM gratefully acknowledge the support of the Leverhulme Trust
and the STFC. DHM would like to thank the Royal Society for their
support through the Research Grant Scheme. DHM and CEP acknowledge
support from the EU under FP7.
NR 56
TC 4
Z9 4
U1 0
U2 7
PU SPRINGER
PI DORDRECHT
PA VAN GODEWIJCKSTRAAT 30, 3311 GZ DORDRECHT, NETHERLANDS
SN 0038-0938
J9 SOL PHYS
JI Sol. Phys.
PD SEP
PY 2013
VL 286
IS 2
BP 357
EP 384
DI 10.1007/s11207-013-0272-1
PG 28
WC Astronomy & Astrophysics
SC Astronomy & Astrophysics
GA 145IC
UT WOS:000319007700005
ER
PT J
AU Le Chat, G
Zaslavsky, A
Meyer-Vernet, N
Issautier, K
Belheouane, S
Pantellini, F
Maksimovic, M
Zouganelis, I
Bale, SD
Kasper, JC
AF Le Chat, G.
Zaslavsky, A.
Meyer-Vernet, N.
Issautier, K.
Belheouane, S.
Pantellini, F.
Maksimovic, M.
Zouganelis, I.
Bale, S. D.
Kasper, J. C.
TI Interplanetary Nanodust Detection by the Solar Terrestrial Relations
Observatory/WAVES Low Frequency Receiver
SO SOLAR PHYSICS
LA English
DT Article
DE Interplanetary dust; Nanodust; In situ dust detection; Radio antennas;
STEREO/WAVES
ID PLASMA-WAVE INSTRUMENT; DUST PARTICLES; RING PLANE; GRAIN IMPACTS; COMET
HALLEY; VOYAGER-2; VEGA-2; RADIO; NEPTUNE; URANUS
AB New measurements using radio and plasma-wave instruments in interplanetary space have shown that nanometer-scale dust, or nanodust, is a significant contributor to the total mass in interplanetary space. Better measurements of nanodust will allow us to determine where it comes from and the extent to which it interacts with the solar wind. When one of these nanodust grains impacts a spacecraft, it creates an expanding plasma cloud, which perturbs the photoelectron currents. This leads to a voltage pulse between the spacecraft body and the antenna. Nanodust has a high charge/mass ratio, and therefore can be accelerated by the interplanetary magnetic field to the speed of the solar wind: significantly faster than the Keplerian orbital speeds of heavier dust. The amplitude of the signal induced by a dust grain grows much more strongly with speed than with mass of the dust particle. As a result, nanodust can produce a strong signal despite its low mass. The WAVES instruments on the twin Solar TErrestrial RElations Observatory spacecraft have observed interplanetary nanodust particles since shortly after their launch in 2006. After describing a new and improved analysis of the last five years of STEREO/WAVES Low Frequency Receiver data, we present a statistical survey of the nanodust characteristics, namely the rise time of the pulse voltage and the flux of nanodust. We show that previous measurements and interplanetary dust models agree with this survey. The temporal variations of the nanodust flux are also discussed.
C1 [Le Chat, G.; Kasper, J. C.] Harvard Smithsonian Ctr Astrophys, Cambridge, MA USA.
[Le Chat, G.; Kasper, J. C.] NASA, Lunar Sci Inst, Moffett Field, CA USA.
[Le Chat, G.; Zaslavsky, A.; Meyer-Vernet, N.; Issautier, K.; Belheouane, S.; Pantellini, F.; Maksimovic, M.] Univ Paris Diderot, Univ Paris 06, CNRS, LESIA,Observ Paris, F-92195 Meudon, France.
[Zouganelis, I.] Univ Paris 06, LPP, Ecole Polytech, CNRS, F-94107 St Maur Des Fosses, France.
[Bale, S. D.] Univ Calif Berkeley, Space Sci Lab, Berkeley, CA 94720 USA.
RP Le Chat, G (reprint author), Harvard Smithsonian Ctr Astrophys, Cambridge, MA USA.
EM glechat@head.cfa.harvard.edu
RI Bale, Stuart/E-7533-2011; Kasper, Justin/D-1152-2010
OI Bale, Stuart/0000-0002-1989-3596; Kasper, Justin/0000-0002-7077-930X
FU CNES; CNRS; NASA
FX We thank the team who designed and built the instrument. The S/WAVES
data used here are produced by an international consortium of the
Observatoire de Paris (France), the University of Minnesota (USA), the
University of California Berkeley (USA), and NASA Goddard Space Flight
Center (USA). The French contribution was funded by CNES and CNRS, and
the USA institutions were funded by NASA.
NR 28
TC 9
Z9 9
U1 1
U2 20
PU SPRINGER
PI DORDRECHT
PA VAN GODEWIJCKSTRAAT 30, 3311 GZ DORDRECHT, NETHERLANDS
SN 0038-0938
J9 SOL PHYS
JI Sol. Phys.
PD SEP
PY 2013
VL 286
IS 2
BP 549
EP 559
DI 10.1007/s11207-013-0268-x
PG 11
WC Astronomy & Astrophysics
SC Astronomy & Astrophysics
GA 145IC
UT WOS:000319007700016
ER
PT J
AU Mueller, T
O'Hara, RB
Converse, SJ
Urbanek, RP
Fagan, WF
AF Mueller, Thomas
O'Hara, Robert B.
Converse, Sarah J.
Urbanek, Richard P.
Fagan, William F.
TI Social Learning of Migratory Performance
SO SCIENCE
LA English
DT Article
ID DECISION-MAKING; ORIENTATION; MOVE; INFORMATION; EVOLUTION; GENETICS;
MODELS; BIRDS
AB Successful bird migration can depend on individual learning, social learning, and innate navigation programs. Using 8 years of data on migrating whooping cranes, we were able to partition genetic and socially learned aspects of migration. Specifically, we analyzed data from a reintroduced population wherein all birds were captive bred and artificially trained by ultralight aircraft on their first lifetime migration. For subsequent migrations, in which birds fly individually or in groups but without ultralight escort, we found evidence of long-term social learning, but no effect of genetic relatedness on migratory performance. Social learning from older birds reduced deviations from a straight-line path, with 7 years of experience yielding a 38% improvement in migratory accuracy.
C1 [Mueller, Thomas; Fagan, William F.] Univ Maryland, Dept Biol, College Pk, MD 20742 USA.
[Mueller, Thomas; O'Hara, Robert B.] Senckenberg Gesell Nat Forsch, Biodivers & Climate Res Ctr BiK F, D-60325 Frankfurt, Main, Germany.
[Mueller, Thomas; O'Hara, Robert B.] Goethe Univ Frankfurt, D-60325 Frankfurt, Main, Germany.
[Mueller, Thomas] Smithsonian Conservat Biol Inst, Front Royal, VA 22630 USA.
[Converse, Sarah J.] US Geol Survey, Patuxent Wildlife Res Ctr, Laurel, MD 20708 USA.
[Urbanek, Richard P.] US Fish & Wildlife Serv, Necedah Natl Wildlife Refuge, Necedah, WI 54646 USA.
RP Mueller, T (reprint author), Univ Maryland, Dept Biol, College Pk, MD 20742 USA.
EM muellert@gmail.com
RI O'Hara, Robert/A-7499-2008;
OI O'Hara, Robert/0000-0001-9737-3724; Converse, Sarah
J/0000-0002-3719-5441
FU NSF [1062411]; Landes-Offensive zur Entwicklung
Wissenschaftlich-okonomischer Exzellenz programme (Hesse, Germany);
Robert Bosch Foundation
FX T.M. and W.F.F. were supported by NSF Advances in Biological Informatics
award 1062411, T. M. and R.B.O. were supported by the Landes-Offensive
zur Entwicklung Wissenschaftlich-okonomischer Exzellenz programme
(Hesse, Germany), and T. M. was supported by the Robert Bosch
Foundation. Data were provided by the Whooping Crane Eastern Partnership
and K. Jones and are deposited in the Dryad Repository:
http://doi.org/10.5061/dryad.1r0f7. We thank F. Hailer, S. Servanty, E.
Grant, J. Calabrese, R. Reynolds, S. Via, E. L. Neuschulz, C. Rushing,
D. Bennu, and three anonymous reviewers for helpful comments and
discussions.
NR 31
TC 45
Z9 45
U1 16
U2 153
PU AMER ASSOC ADVANCEMENT SCIENCE
PI WASHINGTON
PA 1200 NEW YORK AVE, NW, WASHINGTON, DC 20005 USA
SN 0036-8075
EI 1095-9203
J9 SCIENCE
JI Science
PD AUG 30
PY 2013
VL 341
IS 6149
BP 999
EP 1002
DI 10.1126/science.1237139
PG 4
WC Multidisciplinary Sciences
SC Science & Technology - Other Topics
GA 208BZ
UT WOS:000323652300042
PM 23990559
ER
PT J
AU Coverdale, TC
Axelman, EE
Brisson, CP
Young, EW
Altieri, AH
Bertness, MD
AF Coverdale, Tyler C.
Axelman, Eric E.
Brisson, Caitlin P.
Young, Eric W.
Altieri, Andrew H.
Bertness, Mark D.
TI New England Salt Marsh Recovery: Opportunistic Colonization of an
Invasive Species and Its Non-Consumptive Effects
SO PLOS ONE
LA English
DT Article
ID MEDIATED INDIRECT INTERACTIONS; POTENTIAL CONSERVATION VALUE; DIE-OFF;
GLOBAL CHANGE; FOOD-WEB; ECOSYSTEM; MANAGEMENT; SHIFTS; VULNERABILITY;
BIODIVERSITY
AB Predator depletion on Cape Cod (USA) has released the herbivorous crab Sesarma reticulatum from predator control leading to the loss of cordgrass from salt marsh creek banks. After more than three decades of die-off, cordgrass is recovering at heavily damaged sites coincident with the invasion of green crabs (Carcinus maenas) into intertidal Sesarma burrows. We hypothesized that Carcinus is dependent on Sesarma burrows for refuge from physical and biotic stress in the salt marsh intertidal and reduces Sesarma functional density and herbivory through consumptive and non-consumptive effects, mediated by both visual and olfactory cues. Our results reveal that in the intertidal zone of New England salt marshes, Carcinus are burrow dependent, Carcinus reduce Sesarma functional density and herbivory in die-off areas and Sesarma exhibit a generic avoidance response to large, predatory crustaceans. These results support recent suggestions that invasive Carcinus are playing a role in the recovery of New England salt marshes and assertions that invasive species can play positive roles outside of their native ranges.
C1 [Coverdale, Tyler C.; Axelman, Eric E.; Brisson, Caitlin P.; Young, Eric W.; Bertness, Mark D.] Brown Univ, Dept Ecol & Evolutionary Biol, Providence, RI 02912 USA.
[Altieri, Andrew H.] Smithsonian Trop Res Inst, Balboa, Ancon, Panama.
RP Coverdale, TC (reprint author), Brown Univ, Dept Ecol & Evolutionary Biol, Providence, RI 02912 USA.
EM Tyler_Coverdale@Brown.edu
OI Brisson, Caitlin/0000-0001-8567-1863; Coverdale,
Tyler/0000-0003-0910-9187
FU NSF BIO [OCE-0927090]
FX This work was funded by NSF BIO OCE-0927090. The funders had no role in
study design, data collection and analysis, decision to publish, or
preparation of the manuscript.
NR 42
TC 5
Z9 5
U1 2
U2 75
PU PUBLIC LIBRARY SCIENCE
PI SAN FRANCISCO
PA 1160 BATTERY STREET, STE 100, SAN FRANCISCO, CA 94111 USA
SN 1932-6203
J9 PLOS ONE
JI PLoS One
PD AUG 29
PY 2013
VL 8
IS 8
AR e73823
DI 10.1371/journal.pone.0073823
PG 8
WC Multidisciplinary Sciences
SC Science & Technology - Other Topics
GA 209DO
UT WOS:000323734600077
PM 24009763
ER
PT J
AU Yan, YQ
Blume, D
AF Yan, Yangqian
Blume, D.
TI Harmonically trapped Fermi gas: Temperature dependence of the Tan
contact
SO PHYSICAL REVIEW A
LA English
DT Article
ID CLUSTERS; HELIUM
AB Ultracold atomic gases with short-range interactions are characterized by a number of universal species-independent relations. Many of these relations involve the two-body Tan contact. Employing the canonical ensemble, we determine the Tan contact for small harmonically trapped two-component Fermi gases at unitarity over a wide range of temperatures, including the zero and high-temperature regimes. A cluster expansion that describes the properties of the N-particle system in terms of those of smaller subsystems is introduced and shown to provide an accurate description of the contact in the high-temperature regime. Finite-range corrections are quantified and the role of the Fermi statistics is elucidated by comparing results for Fermi, Bose, and Boltzmann statistics.
C1 [Yan, Yangqian; Blume, D.] Washington State Univ, Dept Phys & Astron, Pullman, WA 99164 USA.
[Blume, D.] Harvard Smithsonian Ctr Astrophys, ITAMP, Cambridge, MA 02138 USA.
RP Yan, YQ (reprint author), Washington State Univ, Dept Phys & Astron, Pullman, WA 99164 USA.
FU National Science Foundation (NSF) [PHY-1205443, OCI-1053575]; WSU HPC;
Smithsonian Astrophysical Observatory
FX Support by the National Science Foundation (NSF) through Grant No.
PHY-1205443 is gratefully acknowledged. This work used the Extreme
Science and Engineering Discovery Environment (XSEDE), which is
supported by NSF Grant No. OCI-1053575, and the WSU HPC. This work was
additionally supported by the NSF through a grant for the Institute for
Theoretical Atomic, Molecular and Optical Physics at Harvard University
and Smithsonian Astrophysical Observatory.
NR 52
TC 9
Z9 9
U1 2
U2 11
PU AMER PHYSICAL SOC
PI COLLEGE PK
PA ONE PHYSICS ELLIPSE, COLLEGE PK, MD 20740-3844 USA
SN 2469-9926
EI 2469-9934
J9 PHYS REV A
JI Phys. Rev. A
PD AUG 27
PY 2013
VL 88
IS 2
AR 023616
DI 10.1103/PhysRevA.88.023616
PG 9
WC Optics; Physics, Atomic, Molecular & Chemical
SC Optics; Physics
GA 207NI
UT WOS:000323607900009
ER
PT J
AU Smith, AB
Zamora, S
AF Smith, Andrew B.
Zamora, Samuel
TI Cambrian spiral-plated echinoderms from Gondwana reveal the earliest
pentaradial body plan
SO PROCEEDINGS OF THE ROYAL SOCIETY B-BIOLOGICAL SCIENCES
LA English
DT Article
DE phylogeny; body plans; Echinodermata; evolution; Cambrian explosion
ID SKELETAL HOMOLOGIES; GUIZHOU PROVINCE; WEST GONDWANA; KAILI BIOTA;
DIVERSIFICATION; REPLACEMENTS; CHINA; SHOW
AB Echinoderms are unique among animal phyla in having a pentaradial body plan, and their fossil record provides critical data on how this novel organization came about by revealing intermediate stages. Here, we report a spiral-plated animal from the early Cambrian of Morocco that is the most primitive pentaradial echinoderm yet discovered. It is intermediate between helicoplacoids (a bizarre group of spiral-bodied echinoderms) and crown-group pentaradiate echinoderms. By filling an important gap, this fossil reveals the common pattern that underpins the body plans of the two major echinoderm clades (pelmatozoans and eleutherozoans), showing that differential growth played an important role in their divergence. It also adds to the striking disparity of novel body plans appearing in the Cambrian explosion.
C1 [Smith, Andrew B.] Nat Hist Museum, Dept Earth Sci, London SW7 5BD, England.
[Zamora, Samuel] Smithsonian Inst, Dept Paleobiol, Natl Museum Nat Hist, Washington, DC 20013 USA.
RP Smith, AB (reprint author), Nat Hist Museum, Dept Earth Sci, Cromwell Rd, London SW7 5BD, England.
EM a.smith@nhm.ac.uk
RI Smith, Andrew/B-9849-2009
FU Smithsonian Institution (Springer fund); National Geographic Project
[GEFNE5-11]; [CGL2011-24516]
FX S.Z. was funded by the Smithsonian Institution (Springer fund) and
project CGL2011-24516. Fieldwork was supported by National Geographic
Project grant no. GEFNE5-11.
NR 26
TC 6
Z9 6
U1 0
U2 24
PU ROYAL SOC
PI LONDON
PA 6-9 CARLTON HOUSE TERRACE, LONDON SW1Y 5AG, ENGLAND
SN 0962-8452
J9 P ROY SOC B-BIOL SCI
JI Proc. R. Soc. B-Biol. Sci.
PD AUG 22
PY 2013
VL 280
IS 1765
AR 20131197
DI 10.1098/rspb.2013.1197
PG 6
WC Biology; Ecology; Evolutionary Biology
SC Life Sciences & Biomedicine - Other Topics; Environmental Sciences &
Ecology; Evolutionary Biology
GA 175TH
UT WOS:000321255700025
PM 23804624
ER
PT J
AU Fair, JM
Ryder, TB
Loiselle, BA
Blake, JG
Larson, TE
Davis, P
Syme, J
Perkins, GB
Heikoop, JM
AF Fair, Jeanne M.
Ryder, Thomas B.
Loiselle, Bette A.
Blake, John G.
Larson, Toti E.
Davis, Paul
Syme, James
Perkins, George B.
Heikoop, Jeffrey M.
TI Estimates of dietary overlap for six species of Amazonian manakin birds
using stable isotopes
SO ISOTOPES IN ENVIRONMENTAL AND HEALTH STUDIES
LA English
DT Article; Proceedings Paper
CT 8th International Conference on Applications of Stable Isotope
Techniques to Ecological Studies (ISOECOL)
CY AUG 20-24, 2012
CL Brest, FRANCE
DE birds; carbon-13; diet; feather; isotope ecology; manakin; Monte Carlo
models; moult; nitrogen-15
ID INCORPORATING CONCENTRATION-DEPENDENCE; FRUIT-EATING BIRDS; INDIVIDUAL
SPECIALIZATION; SEASONAL-CHANGES; NITROGEN ISOTOPES; FORAGING ECOLOGY;
CLIMATE-CHANGE; MIXING MODELS; NESTLING DIET; CARBON
AB We used stable isotope ratios to determine the metabolic routing fraction of carbon and nitrogen in feathers in addition to faecal analysis to estimate diet overlap of six sympatric species of manakins in the eastern lowland forest of Ecuador. Collectively, all species varied from-23.7 to-32.7 parts per thousand for C-13, and from 6.0 to 9.9 parts per thousand for N-15, with Machaeropterus regulus showing isotopic differences from the other species. We developed a mixing model that explicitly addresses the routing of carbon and nitrogen to feathers. Interestingly, these results suggest a higher proportion of nitrogen and carbon derived from insects than anticipated based on feeding observations and faecal analysis. A concentration-dependent mixing isotopic model was also used to look at dietary proportions. While larvae and arachnids had higher N-15 values, these two groups may also be preferred prey of manakins and may be more assimilated into tissues, leading to a potential overestimation of the contribution to diet. This study supports the finding that manakin species, previously thought be primarily frugivorous, contain a significant amount of arthropods in their diet.
C1 [Fair, Jeanne M.] Los Alamos Natl Lab, Environm Stewardship, Los Alamos, NM USA.
[Ryder, Thomas B.] Smithsonian Inst, Natl Zool Pk, Smithsonian Migratory Bird Ctr, Washington, DC 20008 USA.
[Loiselle, Bette A.; Blake, John G.] Univ Florida, Dept Wildlife Ecol & Conservat, Gainesville, FL USA.
[Larson, Toti E.; Perkins, George B.; Heikoop, Jeffrey M.] Los Alamos Natl Lab, Div Earth & Environm Sci, Los Alamos, NM 87545 USA.
[Davis, Paul; Syme, James] EnviroLogic Inc, Durango, CO USA.
RP Fair, JM (reprint author), Los Alamos Natl Lab, Environm Stewardship, Los Alamos, NM USA.
EM jmfair@lanl.gov
RI Heikoop, Jeffrey/C-1163-2011; Loiselle, Bette/O-7106-2016;
OI Loiselle, Bette/0000-0003-1434-4173; Larson, Toti/0000-0002-2291-5979;
Heikoop, Jeffrey/0000-0001-7648-3385
FU National Science Foundation [IBN 0235141, IOB 0508189, OISE 0513341];
International Center for Tropical Ecology at the University of Missouri,
St Louis; Association of Field Ornithologist's Alexander Bergstrom
Award; National Geographic Society [7113-01]
FX Thanks to R. Duraes, W. P. Tori, J. R. Hidalgo, and F. Narvaez who
helped collect the data. We give special thanks to David and Consuelo
Romo, Kelly Swing, Jaime Guerra, and all the TBS staff for their
logistical and field support. IACUC protocol number 5-12-20. This
research was conducted in accordance with permit number 13-IC-FAU-DFN,
Distrito Forestal Napo, Tena, Ecuador. We are grateful to Terry Erwin of
the Smithsonian National Museum of Natural History for collecting and
donating the arthropod samples from TBS. We thank the Ministerio de
Ambiente for allowing us to conduct our research at the TBS. Funding was
provided by the National Science Foundation (IBN 0235141, IOB 0508189,
OISE 0513341), the International Center for Tropical Ecology at the
University of Missouri, St Louis, the Association of Field
Ornithologist's Alexander Bergstrom Award, and the National Geographic
Society (7113-01). We also thank L. Marsh and H. Hinojosa for comments
on an earlier draft.
NR 70
TC 3
Z9 3
U1 6
U2 36
PU TAYLOR & FRANCIS LTD
PI ABINGDON
PA 2-4 PARK SQUARE, MILTON PARK, ABINGDON OR14 4RN, OXON, ENGLAND
SN 1025-6016
EI 1477-2639
J9 ISOT ENVIRON HEALT S
JI Isot. Environ. Health Stud.
PD AUG 20
PY 2013
VL 49
IS 3
BP 420
EP 435
DI 10.1080/10256016.2013.784702
PG 16
WC Chemistry, Inorganic & Nuclear; Environmental Sciences
SC Chemistry; Environmental Sciences & Ecology
GA 266HV
UT WOS:000328015600014
PM 23781884
ER
PT J
AU Alexander, DM
Stern, D
Del Moro, A
Lansbury, GB
Assef, RJ
Aird, J
Ajello, M
Ballantyne, DR
Bauer, FE
Boggs, SE
Brandt, WN
Christensen, FE
Civano, F
Comastri, A
Craig, WW
Elvis, M
Grefenstette, BW
Hailey, CJ
Harrison, FA
Hickox, RC
Luo, B
Madsen, KK
Mullaney, JR
Perri, M
Puccetti, S
Saez, C
Treister, E
Urry, CM
Zhang, WW
Bridge, CR
Eisenhardt, PRM
Gonzalez, AH
Miller, SH
Tsai, CW
AF Alexander, D. M.
Stern, D.
Del Moro, A.
Lansbury, G. B.
Assef, R. J.
Aird, J.
Ajello, M.
Ballantyne, D. R.
Bauer, F. E.
Boggs, S. E.
Brandt, W. N.
Christensen, F. E.
Civano, F.
Comastri, A.
Craig, W. W.
Elvis, M.
Grefenstette, B. W.
Hailey, C. J.
Harrison, F. A.
Hickox, R. C.
Luo, B.
Madsen, K. K.
Mullaney, J. R.
Perri, M.
Puccetti, S.
Saez, C.
Treister, E.
Urry, C. M.
Zhang, W. W.
Bridge, C. R.
Eisenhardt, P. R. M.
Gonzalez, A. H.
Miller, S. H.
Tsai, C. W.
TI THE NuSTAR EXTRAGALACTIC SURVEY: A FIRST SENSITIVE LOOK AT THE
HIGH-ENERGY COSMIC X-RAY BACKGROUND POPULATION
SO ASTROPHYSICAL JOURNAL
LA English
DT Article
DE galaxies: active; galaxies: high-redshift; infrared: galaxies; X-rays:
diffuse background; X-rays: general
ID ACTIVE GALACTIC NUCLEI; DEEP FIELD-SOUTH; BL-LACERTAE OBJECTS; MS SOURCE
CATALOGS; ALL-SKY SURVEY; RESOLUTION SPECTRAL TEMPLATES; HOST-GALAXY
PROPERTIES; STAR-FORMING GALAXIES; POINT-SOURCE CATALOGS; HEAVILY
OBSCURED AGN
AB We report on the first 10 identifications of sources serendipitously detected by the Nuclear Spectroscopic Telescope Array (NuSTAR) to provide the first sensitive census of the cosmic X-ray background source population at greater than or similar to 10 keV. We find that these NuSTAR-detected sources are approximate to 100 times fainter than those previously detected at greater than or similar to 10 keV and have a broad range in redshift and luminosity (z = 0.020-2.923 and L10-40 keV approximate to 4 x 10(41)-5 x 10(45) erg s(-1)); the median redshift and luminosity are z approximate to 0.7 and L10-40 keV approximate to 3 x 10(44) erg s(-1), respectively. We characterize these sources on the basis of broad-band approximate to 0.5-32 keV spectroscopy, optical spectroscopy, and broad-band ultraviolet-to-mid-infrared spectral energy distribution analyses. We find that the dominant source population is quasars with L10-40 keV > 10(44) erg s(-1), of which approximate to 50% are obscured with N-H greater than or similar to 10(22) cm(-2). However, none of the 10 NuSTAR sources are Compton thick (N-H greater than or similar to 10(24) cm(-2)) and we place a 90% confidence upper limit on the fraction of Compton-thick quasars (L10-40 keV > 10(44) erg s(-1)) selected at greater than or similar to 10 keV of less than or similar to 33% over the redshift range z = 0.5-1.1. We jointly fitted the rest-frame approximate to 10-40 keV data for all of the non-beamed sources with L10-40 keV > 10(43) erg s(-1) to constrain the average strength of reflection; we find R < 1.4 for Gamma = 1.8, broadly consistent with that found for local active galactic nuclei (AGNs) observed at greater than or similar to 10 keV. We also constrain the host-galaxy masses and find a median stellar mass of approximate to 10(11) M-circle dot, a factor approximate to 5 times higher than the median stellar mass of nearby high-energy selected AGNs, which may be at least partially driven by the order of magnitude higher X-ray luminosities of the NuSTAR sources. Within the low source-statistic limitations of our study, our results suggest that the overall properties of the NuSTAR sources are broadly similar to those of nearby high-energy selected AGNs but scaled up in luminosity and mass.
C1 [Alexander, D. M.; Del Moro, A.; Lansbury, G. B.; Aird, J.; Mullaney, J. R.] Univ Durham, Dept Phys, Durham DH1 3LE, England.
[Stern, D.; Assef, R. J.; Eisenhardt, P. R. M.; Tsai, C. W.] CALTECH, Jet Prop Lab, Pasadena, CA 91109 USA.
[Ajello, M.; Boggs, S. E.] Univ Calif Berkeley, Space Sci Lab, Berkeley, CA 94720 USA.
[Ballantyne, D. R.] Georgia Inst Technol, Sch Phys, Ctr Relativist Astrophys, Atlanta, GA 30332 USA.
[Bauer, F. E.; Saez, C.] Pontificia Univ Catolica Chile, Dept Astron & Astrofis, Santiago 22, Chile.
[Bauer, F. E.] Space Sci Inst, Boulder, CO 80301 USA.
[Brandt, W. N.; Luo, B.] Penn State Univ, Dept Astron & Astrophys, Davey Lab 525, University Pk, PA 16802 USA.
[Brandt, W. N.; Luo, B.] Penn State Univ, Inst Gravitat & Cosmos, University Pk, PA 16802 USA.
[Christensen, F. E.; Craig, W. W.] Tech Univ Denmark, DTU Space Natl Space Inst, DK-2800 Lyngby, Denmark.
[Civano, F.; Hickox, R. C.] Dartmouth Coll, Dept Phys & Astron, Wilder Lab 6127, Hanover, NH 03755 USA.
[Civano, F.; Elvis, M.] Harvard Smithsonian Ctr Astrophys, Cambridge, MA 02138 USA.
[Comastri, A.] INAF Osservatorio Astron Bologna, I-40127 Bologna, Italy.
[Craig, W. W.] Lawrence Livermore Natl Lab, Livermore, CA 94550 USA.
[Grefenstette, B. W.; Harrison, F. A.; Madsen, K. K.] CALTECH, Cahill Ctr Astrophys, Pasadena, CA 91125 USA.
[Hailey, C. J.] Columbia Astrophys Lab, Columbia, NY 10027 USA.
[Perri, M.; Puccetti, S.] ASI Sci Data Ctr, I-00044 Frascati, Italy.
[Perri, M.; Puccetti, S.] INAF Osservatorio Astron Roma, I-00040 Monte Porzio Catone, Italy.
[Treister, E.] Univ Concepcion, Dept Astron, Concepcion, Chile.
[Urry, C. M.] Yale Univ, Dept Phys, Yale Ctr Astron & Astrophys, New Haven, CT 06520 USA.
[Zhang, W. W.] NASA, Goddard Space Flight Ctr, Greenbelt, MD 20771 USA.
[Bridge, C. R.; Miller, S. H.] CALTECH, Pasadena, CA 91125 USA.
[Gonzalez, A. H.] Univ Florida, Dept Astron, Gainesville, FL 32611 USA.
RP Alexander, DM (reprint author), Univ Durham, Dept Phys, Durham DH1 3LE, England.
RI Urry, Claudia/G-7381-2011; Boggs, Steven/E-4170-2015; Brandt,
William/N-2844-2015; Comastri, Andrea/O-9543-2015;
OI Alexander, David/0000-0002-5896-6313; Puccetti,
Simonetta/0000-0002-2734-7835; Urry, Claudia/0000-0002-0745-9792; Boggs,
Steven/0000-0001-9567-4224; Brandt, William/0000-0002-0167-2453;
Comastri, Andrea/0000-0003-3451-9970; Perri, Matteo/0000-0003-3613-4409
FU Leverhulme Trust; Science and Technology Facilities Council (STFC); SAO
grant [GO2-13164X]; NASA Postdoctoral Program at the Jet Propulsion
Laboratory; NSF award [AST 1008067]; Center of Excellence in
Astrophysics and Associated Technologies [PFB 06/2007]; Anillo project
[ACT1101]; FONDECYT [1101024, 1120061]; Caltech NuSTAR [44A-1092750];
NASA ADP grant [NNX10AC99G]; ASI/INAF grant [I/037/12/0]; CONICYT-Chile
under grant FONDECYT [3120198]; NASA [NNG08FD60C]; National Aeronautics
and Space Administration
FX We acknowledge financial support from the Leverhulme Trust (D.M.A. and
J.R.M.), the Science and Technology Facilities Council (STFC; D.M.A.,
A.D.M., and G.B.L.), the SAO grant GO2-13164X (M.A.), NASA Postdoctoral
Program at the Jet Propulsion Laboratory (R.J.A.), NSF award AST 1008067
(D.R.B.), Center of Excellence in Astrophysics and Associated
Technologies (PFB 06/2007; F.E.B. and E.T.), the Anillo project ACT1101
(F.E.B. and E.T.), FONDECYT Regular 1101024 (F.E.B.), Caltech NuSTAR
subcontract 44A-1092750 (W.N.B. and B.L.), NASA ADP grant NNX10AC99G
(W.N.B. and B.L.), ASI/INAF grant I/037/12/0 (A.C. and S.P.),
CONICYT-Chile under grant FONDECYT 3120198 (C.S.), and FONDECYT regular
grant 1120061 (E.T.). We thank the referee for a constructive and
positive report. We also thank Michael Koss for the discussion of
Swift-BAT results, and Mark Brodwin, Daniel Gettings, John Gizis,
Richard Walters, Jingwen Wu, and Dominika Wylezalek for supporting the
ground-based follow-up observations. This work was supported under NASA
Contract No. NNG08FD60C, and made use of data from the NuSTAR mission, a
project led by the California Institute of Technology, managed by the
Jet Propulsion Laboratory, and funded by the National Aeronautics and
Space Administration. We thank the NuSTAR Operations, Software and
Calibration teams for support with the execution and analysis of these
observations. This research has made use of the NuSTAR Data Analysis
Software (NuSTAR-DAS) jointly developed by the ASI Science Data Center
(ASDC, Italy) and the California Institute of Technology (USA).
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PA TEMPLE CIRCUS, TEMPLE WAY, BRISTOL BS1 6BE, ENGLAND
SN 0004-637X
J9 ASTROPHYS J
JI Astrophys. J.
PD AUG 20
PY 2013
VL 773
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AR 125
DI 10.1088/0004-637X/773/2/125
PG 20
WC Astronomy & Astrophysics
SC Astronomy & Astrophysics
GA 205EU
UT WOS:000323426100044
ER
PT J
AU Asgari-Targhi, M
van Ballegooijen, AA
Cranmer, SR
DeLuca, EE
AF Asgari-Targhi, M.
van Ballegooijen, A. A.
Cranmer, S. R.
DeLuca, E. E.
TI THE SPATIAL AND TEMPORAL DEPENDENCE OF CORONAL HEATING BY ALFVEN WAVE
TURBULENCE
SO ASTROPHYSICAL JOURNAL
LA English
DT Article
DE magnetohydrodynamics (MHD); Sun: corona; turbulence; waves
ID MAGNETIC-FIELD; SOLAR-WIND; MAGNETOHYDRODYNAMIC TURBULENCE; TRANSITION
REGION; MODEL; LOOPS; DYNAMICS; NANOFLARES; MOTIONS; CHROMOSPHERE
AB The solar atmosphere may be heated by Alfven waves that propagate up from the convection zone and dissipate their energy in the chromosphere and corona. To further test this theory, we consider wave heating in an active region observed on 2012 March 7. A potential field model of the region is constructed, and 22 field lines representing observed coronal loops are traced through the model. Using a three-dimensional (3D) reduced magnetohydrodynamics code, we simulate the dynamics of Alfven waves in and near the observed loops. The results for different loops are combined into a single formula describing the average heating rate Q as a function of position within the observed active region. We suggest this expression may be approximately valid also for other active regions, and therefore may be used to construct 3D, time-dependent models of the coronal plasma. Such models are needed to understand the role of thermal non-equilibrium in the structuring and dynamics of the Sun's corona.
C1 [Asgari-Targhi, M.; van Ballegooijen, A. A.; Cranmer, S. R.; DeLuca, E. E.] Harvard Smithsonian Ctr Astrophys, Cambridge, MA 02138 USA.
RP Asgari-Targhi, M (reprint author), Harvard Smithsonian Ctr Astrophys, 60 Garden St MS 15, Cambridge, MA 02138 USA.
RI DeLuca, Edward/L-7534-2013;
OI DeLuca, Edward/0000-0001-7416-2895; van Ballegooijen,
Adriaan/0000-0002-5622-3540
FU NASA [NNM07AB07C]; LMSAL [SP02H1701R]
FX This project is supported under contract NNM07AB07C from NASA to the
Smithsonian Astrophysical Observatory (SAO) and SP02H1701R from LMSAL to
SAO.
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PA TEMPLE CIRCUS, TEMPLE WAY, BRISTOL BS1 6BE, ENGLAND
SN 0004-637X
EI 1538-4357
J9 ASTROPHYS J
JI Astrophys. J.
PD AUG 20
PY 2013
VL 773
IS 2
AR 111
DI 10.1088/0004-637X/773/2/111
PG 12
WC Astronomy & Astrophysics
SC Astronomy & Astrophysics
GA 205EU
UT WOS:000323426100030
ER
PT J
AU Baskin, NJ
Knutson, HA
Burrows, A
Fortney, JJ
Lewis, NK
Agol, E
Charbonneau, D
Cowan, NB
Deming, D
Desert, JM
Langton, J
Laughlin, G
Showman, AP
AF Baskin, Nathaniel J.
Knutson, Heather A.
Burrows, Adam
Fortney, Jonathan J.
Lewis, Nikole K.
Agol, Eric
Charbonneau, David
Cowan, Nicolas B.
Deming, Drake
Desert, Jean-Michel
Langton, Jonathan
Laughlin, Gregory
Showman, Adam P.
TI SECONDARY ECLIPSE PHOTOMETRY OF THE EXOPLANET WASP-5b WITH WARM SPITZER
SO ASTROPHYSICAL JOURNAL
LA English
DT Article
DE eclipses; planetary systems; techniques: photometric
ID TRANSIT TIMING VARIATIONS; PLANET HD 189733B; HOT JUPITERS; EXTRASOLAR
PLANET; ATMOSPHERIC CIRCULATION; THERMAL EMISSION; PHASE VARIATIONS;
STARS; MODEL; ECCENTRICITIES
AB We present secondary eclipse photometry of the extrasolar planet WASP-5b taken in the 3.6 and 4.5 mu m bands with the Spitzer Space Telescope's Infrared Array Camera as part of the extended warm mission. By estimating the depth of the secondary eclipse in these two bands we can place constraints on the planet's atmospheric pressure-temperature profile and chemistry. We measure secondary eclipse depths of 0.197% +/- 0.028% and 0.237% +/- 0.024% in the 3.6 mu m and 4.5 mu m bands, respectively. For the case of a solar-composition atmosphere and chemistry in local thermal equilibrium, our observations are best matched by models showing a hot dayside and, depending on our choice of model, a weak thermal inversion or no inversion at all. We measure a mean offset from the predicted center of eclipse of 3.7 +/- 1.8 minutes, corresponding to e cos omega = 0.0025 +/- 0.0012 and consistent with a circular orbit. We conclude that the planet's orbit is unlikely to have been perturbed by interactions with another body in the system as claimed by Fukui et al.
C1 [Baskin, Nathaniel J.; Knutson, Heather A.; Desert, Jean-Michel] CALTECH, Div Geol & Planetary Sci, Pasadena, CA 91125 USA.
[Burrows, Adam] Princeton Univ, Dept Astrophys Sci, Princeton, NJ 05844 USA.
[Fortney, Jonathan J.; Laughlin, Gregory] Univ Calif Santa Cruz, Dept Astron & Astrophys, Santa Cruz, CA 95064 USA.
[Lewis, Nikole K.] MIT, Dept Earth Atmospher & Planetary Sci, Cambridge, MA 02139 USA.
[Agol, Eric] Univ Washington, Dept Astron, Seattle, WA 98195 USA.
[Charbonneau, David] Harvard Smithsonian Ctr Astrophys, Cambridge, MA 02138 USA.
[Cowan, Nicolas B.] Northwestern Univ, Ctr Interdisciplinary Explorat & Res Astrophys, Evanston, IL 60208 USA.
[Deming, Drake] Univ Maryland, Dept Astron, College Pk, MD 20742 USA.
[Langton, Jonathan] Principia Coll, Dept Phys, Elsah, IL 62028 USA.
[Showman, Adam P.] Univ Arizona, Lunar & Planetary Lab, Tucson, AZ 85721 USA.
RP Baskin, NJ (reprint author), CALTECH, Div Geol & Planetary Sci, Pasadena, CA 91125 USA.
OI Fortney, Jonathan/0000-0002-9843-4354; /0000-0002-0802-9145
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PA TEMPLE CIRCUS, TEMPLE WAY, BRISTOL BS1 6BE, ENGLAND
SN 0004-637X
J9 ASTROPHYS J
JI Astrophys. J.
PD AUG 20
PY 2013
VL 773
IS 2
AR 124
DI 10.1088/0004-637X/773/2/124
PG 5
WC Astronomy & Astrophysics
SC Astronomy & Astrophysics
GA 205EU
UT WOS:000323426100043
ER
PT J
AU Cucchiara, A
Prochaska, JX
Zhu, G
Menard, B
Fynbo, JPU
Fox, DB
Chen, HW
Cooksey, KL
Cenko, SB
Perley, D
Bloom, JS
Berger, E
Tanvir, NR
D'Elia, V
Lopez, S
Chornock, R
de Jaeger, T
AF Cucchiara, A.
Prochaska, J. X.
Zhu, G.
Menard, B.
Fynbo, J. P. U.
Fox, D. B.
Chen, H. -W.
Cooksey, K. L.
Cenko, S. B.
Perley, D.
Bloom, J. S.
Berger, E.
Tanvir, N. R.
D'Elia, V.
Lopez, S.
Chornock, R.
de Jaeger, T.
TI AN INDEPENDENT MEASUREMENT OF THE INCIDENCE OF Mg II ABSORBERS ALONG
GAMMA-RAY BURST SIGHT LINES: THE END OF THE MYSTERY?
SO ASTROPHYSICAL JOURNAL
LA English
DT Article
DE gamma-ray burst: general; quasars: absorption lines; techniques:
spectroscopic
ID DIGITAL-SKY-SURVEY; SURVEY QSO-SPECTRA; OPTICAL SPECTROSCOPY; REDSHIFT
GALAXIES; ABSORPTION-LINES; HOST GALAXY; SWIFT-ERA; REAL-TIME;
FOLLOW-UP; OF-SIGHT
AB In 2006, Prochter et al. reported a statistically significant enhancement of very strong Mg II absorption systems intervening the sight lines to gamma-ray bursts (GRBs) relative to the incidence of such absorption along quasar sight lines. This counterintuitive result has inspired a diverse set of astrophysical explanations (e.g., dust, gravitational lensing) but none of these has obviously resolved the puzzle. Using the largest set of GRB afterglow spectra available, we reexamine the purported enhancement. In an independent sample of GRB spectra with a survey path three times larger than Prochter et al., we measure the incidence per unit redshift of >= 1 angstrom rest-frame equivalent width Mg II absorbers at z approximate to 1 to be l(z) = 0.18 +/- 0.06. This is fully consistent with current estimates for the incidence of such absorbers along quasar sight lines. Therefore, we do not confirm the original enhancement and suggest those results suffered from a statistical fluke. Signatures of the original result do remain in our full sample (l(z) shows an approximate to 1.5 enhancement over l(z)(QSO)), but the statistical significance now lies at approximate to 90% c.l. Restricting our analysis to the subset of high-resolution spectra of GRB afterglows (which overlaps substantially with Prochter et al.), we still reproduce a statistically significant enhancement of Mg II absorption. The reason for this excess, if real, is still unclear since there is no connection between the rapid afterglow follow-up process with echelle (or echellette) spectrographs and the detectability of strong Mg II doublets. Only a larger sample of such high-resolution data will shed some light on this matter.
C1 [Cucchiara, A.; Prochaska, J. X.] Univ Calif Santa Cruz, Dept Astron & Astrophys, UCO Lick Observ, Santa Cruz, CA 95064 USA.
[Zhu, G.; Menard, B.] Johns Hopkins Univ, Dept Phys & Astron, Baltimore, MD 21218 USA.
[Menard, B.] Univ Tokyo, Kavli Inst Phys & Math Universe, Kashiwa, Chiba 2778583, Japan.
[Fynbo, J. P. U.] Univ Copenhagen, Niels Bohr Inst, Dark Cosmol Ctr, DK-2100 Copenhagen, Denmark.
[Fox, D. B.] Penn State Univ, Dept Astron & Astrophys, University Pk, PA 16802 USA.
[Chen, H. -W.] Univ Chicago, Dept Astron & Astrophys, Kavli Inst Cosmol Phys, Chicago, IL 60637 USA.
[Cooksey, K. L.] MIT, Kavli Inst Astrophys & Space Res, Cambridge, MA 02139 USA.
[Cenko, S. B.; Bloom, J. S.] Univ Calif Berkeley, Dept Astron, Berkeley, CA 94720 USA.
[Perley, D.] CALTECH, Dept Astron, Pasadena, CA 91125 USA.
[Berger, E.; Chornock, R.] Harvard Smithsonian Ctr Astrophys, Cambridge, MA 02138 USA.
[Tanvir, N. R.] Univ Leicester, Dept Phys & Astron, Leicester LE1 7RH, Leics, England.
[D'Elia, V.] Osserv Astron Roma, Ist Nazl Astrofis, I-00040 Monte Porzio Catone, Italy.
[Lopez, S.; de Jaeger, T.] Univ Chile, Dept Astron, Santiago, Chile.
RP Cucchiara, A (reprint author), Univ Calif Santa Cruz, Dept Astron & Astrophys, UCO Lick Observ, 1156 High St, Santa Cruz, CA 95064 USA.
EM acucchia@ucolick.org
RI Fynbo, Johan/L-8496-2014; Lopez, Sebastian /I-5657-2016;
OI Fynbo, Johan/0000-0002-8149-8298; Lopez, Sebastian /0000-0003-0389-0902;
D'Elia, Valerio/0000-0002-7320-5862; Zhu, Guangtun/0000-0002-7574-8078;
Chen, Hsiao-Wen/0000-0001-8813-4182
FU FONDECYT [1100214]; Center of Excellence in Astrophysics and Associated
Technologies [PFB 06]; ERC-StG [EGGS-278202]; DNRF
FX A.C. thanks the anonymous referee for the valuable comments and
suggestions. A.C. also thanks J.X. Prochaska for the fundamental
guidances, without which this work could not be possible. A.C. also
thanks B. Menard and B. Zhu for the useful comments and to have provided
the best to date compilation of high signal-to-noise quasars spectra as
well their Mg II search results. Gemini results are based on
observations obtained at the Gemini Observatory, which is operated by
the Association of Universities for Research in Astronomy, Inc., under a
cooperative agreement with the NSF on behalf of the Gemini partnership:
the National Science Foundation (United States), the National Research
Council (Canada), CONICYT (Chile), the Australian Research Council
(Australia), Ministerio da Ciencia, Tecnologia e Inovacao (Brazil), and
Ministerio de Ciencia, Tecnologia e Innovacion Productiva (Argentina).
S.L. has been supported by FONDECYT grant number 1100214 and received
partial support from the Center of Excellence in Astrophysics and
Associated Technologies (PFB 06). J.P.U.F. acknowledges support from the
ERC-StG grant EGGS-278202. The Dark Cosmology Centre is funded by the
DNRF.
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SN 0004-637X
J9 ASTROPHYS J
JI Astrophys. J.
PD AUG 20
PY 2013
VL 773
IS 2
AR 82
DI 10.1088/0004-637X/773/2/82
PG 24
WC Astronomy & Astrophysics
SC Astronomy & Astrophysics
GA 205EU
UT WOS:000323426100001
ER
PT J
AU Dahle, H
Gladders, MD
Sharon, K
Bayliss, MB
Wuyts, E
Abramson, LE
Koester, BP
Groeneboom, N
Brinckmann, TE
Kristensen, MT
Lindholmer, MO
Nielsen, A
Krogager, JK
Fynbo, JPU
AF Dahle, H.
Gladders, M. D.
Sharon, K.
Bayliss, M. B.
Wuyts, E.
Abramson, L. E.
Koester, B. P.
Groeneboom, N.
Brinckmann, T. E.
Kristensen, M. T.
Lindholmer, M. O.
Nielsen, A.
Krogager, J. -K.
Fynbo, J. P. U.
TI SDSS J2222+2745: A GRAVITATIONALLY LENSED SEXTUPLE QUASAR WITH A MAXIMUM
IMAGE SEPARATION OF 15.'' 1 DISCOVERED IN THE SLOAN GIANT ARCS SURVEY
SO ASTROPHYSICAL JOURNAL
LA English
DT Article
DE galaxies: clusters: general; gravitational lensing: strong; quasars:
individual (SDSS J2222+2745)
ID DIGITAL-SKY-SURVEY; GALAXY CLUSTERS; MASS-DISTRIBUTION; TIME-DELAY; 5TH
IMAGE; J1004+4112; STATISTICS; J1029+2623; SPECTRA
AB We report the discovery of a unique gravitational lens system, SDSS J2222+2745, producing five spectroscopically confirmed images of a z(s) = 2.82 quasar lensed by a foreground galaxy cluster at z(l) = 0.49. We also present photometric and spectroscopic evidence for a sixth lensed image of the same quasar. The maximum separation between the quasar images is 15.'' 1. Both the large image separations and the high image multiplicity are in themselves rare among known lensed quasars, and observing the combination of these two factors is an exceptionally unlikely occurrence in present data sets. This is only the third known case of a quasar lensed by a cluster, and the only one with six images. The lens system was discovered in the course of the Sloan Giant Arcs Survey, in which we identify candidate lenses in the Sloan Digital Sky Survey and target these for follow-up and verification with the 2.56 m Nordic Optical Telescope. Multi-band photometry obtained over multiple epochs from 2011 September to 2012 September reveals significant variability at the similar to 10%-30% level in some of the quasar images, indicating that measurements of the relative time delay between quasar images will be feasible. In this lens system, we also identify a bright (g = 21.5) giant arc corresponding to a strongly lensed background galaxy at z(s) = 2.30. We fit parametric models of the lens system, constrained by the redshift and positions of the quasar images and the redshift and position of the giant arc. The predicted time delays between different pairs of quasar images range from similar to 100 days to similar to 6 yr.
C1 [Dahle, H.; Groeneboom, N.] Univ Oslo, Inst Theoret Astrophys, NO-0315 Oslo, Norway.
[Dahle, H.] Univ Oslo, Ctr Math Applicat, NO-0315 Oslo, Norway.
[Gladders, M. D.; Abramson, L. E.] Univ Chicago, Dept Astron & Astrophys, Chicago, IL 60637 USA.
[Gladders, M. D.; Abramson, L. E.] Univ Chicago, Kavli Inst Cosmol Phys, Chicago, IL 60637 USA.
[Sharon, K.] Univ Michigan, Dept Astron, Ann Arbor, MI 48109 USA.
[Bayliss, M. B.] Harvard Smithsonian Ctr Astrophys, Cambridge, MA 02138 USA.
[Bayliss, M. B.] Harvard Univ, Dept Phys, Cambridge, MA 02138 USA.
[Wuyts, E.] Max Planck Inst Extraterr Phys, D-85748 Garching, Germany.
[Koester, B. P.] Univ Michigan, Dept Phys, Ann Arbor, MI 48109 USA.
[Brinckmann, T. E.; Kristensen, M. T.; Lindholmer, M. O.; Nielsen, A.; Krogager, J. -K.; Fynbo, J. P. U.] Niels Bohr Inst, Dark Cosmol Ctr, DK-2100 Copenhagen O, Denmark.
RP Dahle, H (reprint author), Univ Oslo, Inst Theoret Astrophys, POB 1029, NO-0315 Oslo, Norway.
EM hdahle@astro.uio.no
RI Fynbo, Johan/L-8496-2014; Krogager, Jens-Kristian/E-4384-2015
OI Fynbo, Johan/0000-0002-8149-8298; Krogager,
Jens-Kristian/0000-0002-4912-9388
FU Research Council of Norway; Research Corporation through a Cottrell
Scholars award; University of Michigan's President's Postdoctoral
Fellowship; ERC-StG [EGGS-278202]; DNRF
FX H.D. acknowledges support from the Research Council of Norway. M.D.G.
thanks the Research Corporation for support of this work through a
Cottrell Scholars award. K.S. acknowledges support from the University
of Michigan's President's Postdoctoral Fellowship. J.P.U.F. acknowledges
support from the ERC-StG grant EGGS-278202. The Dark Cosmology Centre is
funded by the DNRF. We thank the NOT staff, in particular our support
astronomer Stefan Geier, for excellent support, including accommodating
a last-minute instrument change which allowed the spectroscopic
confirmation of the D image and discovery of the E image of the quasar.
NR 35
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PA TEMPLE CIRCUS, TEMPLE WAY, BRISTOL BS1 6BE, ENGLAND
SN 0004-637X
J9 ASTROPHYS J
JI Astrophys. J.
PD AUG 20
PY 2013
VL 773
IS 2
AR 146
DI 10.1088/0004-637X/773/2/146
PG 10
WC Astronomy & Astrophysics
SC Astronomy & Astrophysics
GA 205EU
UT WOS:000323426100065
ER
PT J
AU Grier, CJ
Martini, P
Watson, LC
Peterson, BM
Bentz, MC
Dasyra, KM
Dietrich, M
Ferrarese, L
Pogge, RW
Zu, Y
AF Grier, C. J.
Martini, P.
Watson, L. C.
Peterson, B. M.
Bentz, M. C.
Dasyra, K. M.
Dietrich, M.
Ferrarese, L.
Pogge, R. W.
Zu, Y.
TI STELLAR VELOCITY DISPERSION MEASUREMENTS IN HIGH-LUMINOSITY QUASAR HOSTS
AND IMPLICATIONS FOR THE AGN BLACK HOLE MASS SCALE
SO ASTROPHYSICAL JOURNAL
LA English
DT Article
DE galaxies: active; galaxies: kinematics and dynamics; galaxies: nuclei;
quasars: individual (PG1411+442, PG1617+175, Mrk 509, PG 2130+099)
ID ACTIVE GALACTIC NUCLEI; M-BH-SIGMA; BROAD-LINE REGION; ULTRALUMINOUS
INFRARED GALAXIES; SEYFERT 1 GALAXIES; MONITORING PROJECT; DELAY MAPS;
ARP 151; EVOLUTION; GROWTH
AB We present new stellar velocity dispersion measurements for four luminous quasars with the Near-Infrared Integral Field Spectrometer instrument and the ALTAIR laser guide star adaptive optics system on the Gemini North 8 m telescope. Stellar velocity dispersion measurements and measurements of the supermassive black hole (BH) masses in luminous quasars are necessary to investigate the coevolution of BHs and galaxies, trace the details of accretion, and probe the nature of feedback. We find that higher-luminosity quasars with higher-mass BHs are not offset with respect to the M-BH-sigma* relation exhibited by lower-luminosity active galactic nuclei (AGNs) with lower-mass BHs, nor do we see correlations with galaxy morphology. As part of this analysis, we have recalculated the virial products for the entire sample of reverberation-mapped AGNs and used these data to redetermine the mean virial factor < f > that places the reverberation data on the quiescent M-BH-sigma* relation. With our updated measurements and new additions to the AGN sample, we obtain < f > = 4.31 +/- 1.05, which is slightly lower than, but consistent with, most previous determinations.
C1 [Grier, C. J.; Martini, P.; Peterson, B. M.; Pogge, R. W.; Zu, Y.] Ohio State Univ, Dept Astron, Columbus, OH 43210 USA.
[Martini, P.; Peterson, B. M.; Pogge, R. W.] Ohio State Univ, Ctr Cosmol & AstroParticle Phys, Columbus, OH 43210 USA.
[Watson, L. C.] Harvard Smithsonian Ctr Astrophys, Cambridge, MA 02138 USA.
[Bentz, M. C.] Georgia State Univ, Dept Phys & Astron, Atlanta, GA 30303 USA.
[Dasyra, K. M.] Observ Paris, LERMA, CNRS, UMR8112, F-75014 Paris, France.
[Dietrich, M.] Ohio Univ, Dept Phys & Astron, Athens, OH 45601 USA.
[Ferrarese, L.] Natl Res Council Canada, Herzberg Inst Astrophys, Victoria, BC V9E 2E7, Canada.
RP Grier, CJ (reprint author), Ohio State Univ, Dept Astron, 140 W 18th Ave, Columbus, OH 43210 USA.
OI Dasyra, Kalliopi/0000-0002-1482-2203; Zu, Ying/0000-0001-6966-6925
FU National Science Foundation [AST-1008882]; Presidential Fellowship at
The Ohio State University; North American ALMA Science Center (NAASC) at
NRAO; National Aeronautics and Space Administration
FX The authors would like to thank Jenny Greene and Alister Graham for
their helpful suggestions that improved this work. We also thank Luis Ho
for pointing out a scaling error in the reported lags prior to
publication. C.J.G. would like to thank Gisella De Rosa for help with
some of the code used in this analysis. B.M.P., R.W.P., and C.J.G.
gratefully acknowledge the support of the National Science Foundation
through grant AST-1008882 to The Ohio State University. C.J.G. is also
supported by a Presidential Fellowship at The Ohio State University.
P.M. is grateful for support from the sabbatical visitor program at the
North American ALMA Science Center (NAASC) at NRAO and the hospitality
of both the NAASC and the University of Virginia while this work was
completed. This research has made use of the NASA/IPAC Extragalactic
Database (NED), which is operated by the Jet Propulsion Laboratory,
California Institute of Technology, under contract with the National
Aeronautics and Space Administration. This work is based on observations
obtained at the Gemini Observatory, which is operated by the Association
of Universities for Research in Astronomy, Inc., under a cooperative
agreement with the NSF on behalf of the Gemini partnership: the National
Science Foundation (United States), the National Research Council
(Canada), CONICYT (Chile), the Australian Research Council (Australia),
Ministerio da Ciencia, Tecnologia e Inovacao (Brazil) and Ministerio de
Ciencia, Tecnologia e Innovacion Productiva (Argentina).
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JI Astrophys. J.
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PY 2013
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PG 14
WC Astronomy & Astrophysics
SC Astronomy & Astrophysics
GA 205EU
UT WOS:000323426100009
ER
PT J
AU Guarcello, MG
Drake, JJ
Wright, NJ
Drew, JE
Gutermuth, RA
Hora, JL
Naylor, T
Aldcroft, T
Fruscione, A
Garcia-Alvarez, D
Kashyap, VL
King, R
AF Guarcello, M. G.
Drake, J. J.
Wright, N. J.
Drew, J. E.
Gutermuth, R. A.
Hora, J. L.
Naylor, T.
Aldcroft, T.
Fruscione, A.
Garcia-Alvarez, D.
Kashyap, V. L.
King, R.
TI THE PROTOPLANETARY DISKS IN THE NEARBY MASSIVE STAR-FORMING REGION
CYGNUS OB2
SO ASTROPHYSICAL JOURNAL
LA English
DT Article
DE infrared: stars; open clusters and associations: individual (Cygnus
OB2); protoplanetary disks; stars: formation; stars: pre-main sequence
ID YOUNG STELLAR OBJECTS; ORION NEBULA CLUSTER; DIGITAL-SKY-SURVEY;
WIDE-FIELD CAMERA; T-TAURI STARS; X REGION; DATA RELEASE; SPECTRAL
CLASSIFICATION; SPATIAL-DISTRIBUTION; SPITZER OBSERVATIONS
AB The formation of stars in massive clusters is one of the main modes of the star formation process. However, the study of massive star-forming regions is hampered by their typically large distances to the Sun. One exception to this is the massive star-forming region Cygnus OB2 in the Cygnus X region, at the distance of similar to 1400 pc. Cygnus OB2 hosts very rich populations of massive and low-mass stars, being the best target in our Galaxy to study the formation of stars, circumstellar disks, and planets in the presence of massive stars. In this paper, we combine a wide and deep set of photometric data, from the r band to 24 mu m, in order to select the disk-bearing population of stars in Cygnus OB2 and identify the class I, class II, and stars with transition and pre-transition disks. We selected 1843 sources with infrared excesses in an area of 1 degrees x 1 degrees centered on Cyg OB2 in several evolutionary stages: 8.4% class I, 13.1% flat-spectrum sources, 72.9% class II, 2.3% pre-transition disks, and 3.3% transition disks. The spatial distribution of these sources shows a central cluster surrounded by an annular overdensity and some clumps of recent star formation in the outer region. Several candidate subclusters are identified, both along the overdensity and in the rest of the association.
C1 [Guarcello, M. G.; Drake, J. J.; Wright, N. J.; Hora, J. L.; Aldcroft, T.; Fruscione, A.; Kashyap, V. L.] Smithsonian Astrophys Observ, Cambridge, MA 02138 USA.
[Wright, N. J.; Drew, J. E.] Univ Hertfordshire, Sch Phys Astron & Math, Hatfield AL10 9AB, Herts, England.
[Gutermuth, R. A.] Smith Coll, Coll Astron Dept 5, Northampton, MA 01063 USA.
[Gutermuth, R. A.] Univ Massachusetts, Dept Astron, Amherst, MA 01003 USA.
[Naylor, T.; King, R.] Univ Exeter, Sch Phys, Exeter EX4 4QL, Devon, England.
[Garcia-Alvarez, D.] Univ La Laguna, Dpto Astrofis, E-38206 Tenerife, Spain.
[Garcia-Alvarez, D.] Grantecan CALP, E-38712 Brena Baja, La Palma, Spain.
[Garcia-Alvarez, D.] Inst Astrofis Canarias, E-38205 Tenerife, Spain.
RP Guarcello, MG (reprint author), Smithsonian Astrophys Observ, MS-67,60 Garden St, Cambridge, MA 02138 USA.
RI Naylor, Tim /A-9465-2015;
OI Drew, Janet/0000-0003-1192-7082
FU National Aeronautics and Space Administration; National Science
Foundation; NASA [NAS8-39073]; Chandra grant [GO0-11040X]; Spanish
MICINN [AYA2008-02038]; NASA Astrophysics Data Analysis Program (ADAP)
[NNX11AD14G, NNX13AF08G]; Caltech/JPL [1373081, 1424329, 1440160]
FX We thank the anonymous referee for the useful comments. The authors are
indebted with Raffaele D'Abrusco and Ignazio Pillitteri for their
precious help. This article makes use of data obtained with observations
made with the Gran Telescopio CANARIAS (GTC), installed in the Spanish
Observatorio del Roque de los Muchachos of the Instituto de Astrofisica
de CANARIAS, in the island of La Palma; data obtained as part of the INT
Photometric H alpha Survey (IPHAS) of the northern Galactic plane
carried out at the Isaac Newton Telescope (INT; all IPHAS data are
processed by the Cambridge Astronomical Survey Unit, at the Institute of
Astronomy in Cambridge); SDSS data, founded by the Alfred P. Sloan
Foundation, the Participating Institutions, the National Science
Foundation, the U.S. Department of Energy, the National Aeronautics and
Space Administration, the Japanese Monbukagakusho, the Max Planck
Society, and the Higher Education Funding Council for England; data
products from the Two Micron All Sky Survey, which is a joint project of
the University of Massachusetts and the Infrared Processing and Analysis
Center/California Institute of Technology, funded by the National
Aeronautics and Space Administration and the National Science
Foundation; data based on observations made with the Spitzer Space
Telescope, which is operated by the Jet Propulsion Laboratory,
California Institute of Technology, under contract with NASA. The paper
is also based on data obtained as part of the UKIRT Infrared Deep Sky
Survey (UKIDSS; Lawrence et al. 2007; we are grateful to Charles
Williams for his support of the Apple Mac X-grid cluster in Exeter, on
which the UKIRT data were reduced). UKIDSS uses the UKIRT Wide Field
Camera (WFCAM; Casali et al. 2007). The photometric system is described
in Hewett et al. (2006), and the calibration is described in Hodgkin et
al. (2009). The pipeline processing and science archive are described in
M. J. Irwin et al. (in preparation) and Hambly et al. (2008). M.G.G. is
supported by the Chandra grant GO0-11040X. J.J.D., V.L.K., and T.A. are
supported by NASA contract NAS8-39073 to the Chandra X-ray Center (CXC)
and thank the Director, Harvey Tananbaum, and the CXC science staff for
advice and support. D.G.A. acknowledges support from the Spanish MICINN
through grant AYA2008-02038. R.A.G. would like to acknowledge the
support of NASA Astrophysics Data Analysis Program (ADAP) grants
NNX11AD14G and NNX13AF08G, and Caltech/JPL awards 1373081, 1424329, and
1440160 in support of Spitzer Space Telescope observing programs.
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JI Astrophys. J.
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PG 24
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SC Astronomy & Astrophysics
GA 205EU
UT WOS:000323426100054
ER
PT J
AU Isenberg, PA
Maruca, BA
Kasper, JC
AF Isenberg, Philip A.
Maruca, Bennett A.
Kasper, Justin C.
TI SELF-CONSISTENT ION CYCLOTRON ANISOTROPY-BETA RELATION FOR SOLAR WIND
PROTONS
SO ASTROPHYSICAL JOURNAL
LA English
DT Article
DE plasmas; solar wind; waves
ID PITCH-ANGLE DIFFUSION; TEMPERATURE ANISOTROPY; MAGNETIC-FIELD; CORONAL
HOLE; MINOR IONS; 1 AU; WAVES; TURBULENCE; FLUCTUATIONS; INSTABILITY
AB We derive a set of self-consistent marginally stable states for a system of ion-cyclotron waves propagating parallel to the large-scale magnetic field through a homogeneous proton-electron plasma. The proton distributions and the wave dispersions are related through the condition that no further ion-cyclotron resonant particle scattering or wave growth/damping may take place. The thermal anisotropy of the protons in these states therefore defines the threshold value for triggering the proton-cyclotron anisotropy instability. A number of recent papers have noted that the anisotropy of solar wind protons at 1 AU does not seem to be limited by the proton-cyclotron anisotropy threshold, even at low plasma beta. However, this puzzle seems to be due solely to the estimation of this anisotropy threshold under the assumption that the protons have a bi-Maxwellian distribution. We note that bi-Maxwellian distributions are never marginally stable to the resonant cyclotron interaction, so these estimates do not represent physically valid thresholds. The threshold anisotropies obtained from our marginally stable states are much larger, as a function of proton parallel beta, than the bi-Maxwellian estimates, and we show that the measured data remains below these more rigorous thresholds. Thus, the results of this paper resolve the apparent contradiction presented by the solar wind anisotropy observations at 1 AU: the bi-Maxwellian anisotropies are not rigorous thresholds, and so do not limit the proton distributions in the solar wind.
C1 [Isenberg, Philip A.] Univ New Hampshire, Inst Study Earth Oceans & Space, Durham, NH 03824 USA.
[Maruca, Bennett A.] Univ Calif Berkeley, Space Sci Lab, Berkeley, CA 94720 USA.
[Kasper, Justin C.] Harvard Smithsonian Ctr Astrophys, Cambridge, MA 02138 USA.
RP Isenberg, PA (reprint author), Univ New Hampshire, Inst Study Earth Oceans & Space, Durham, NH 03824 USA.
EM phil.isenberg@unh.edu; bmaruca@ssl.berkeley.edu; jkasper@cfa.harvard.edu
FU NSF [ATM0719738, AGS 0962506]; NASA [NNX08AW07G, NNX11AJ37G]; DoE
[DEFG0207ER46372]
FX This work was supported in part by NSF grants ATM0719738 and AGS
0962506, NASA grants NNX08AW07G and NNX11AJ37G, and DoE grant
DEFG0207ER46372.
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JI Astrophys. J.
PD AUG 20
PY 2013
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PG 6
WC Astronomy & Astrophysics
SC Astronomy & Astrophysics
GA 205EU
UT WOS:000323426100083
ER
PT J
AU Jorstad, SG
Marscher, AP
Smith, PS
Larionov, VM
Agudo, I
Gurwell, M
Wehrle, AE
Lahteenmaki, A
Nikolashvili, MG
Schmidt, GD
Arkharov, AA
Blinov, DA
Blumenthal, K
Casadio, C
Chigladze, RA
Efimova, NV
Eggen, JR
Gomez, JL
Grupe, D
Hagen-Thorn, VA
Joshi, M
Kimeridze, GN
Konstantinova, TS
Kopatskaya, EN
Kurtanidze, OM
Kurtanidze, SO
Larionova, EG
Larionova, LV
Sigua, LA
MacDonald, NR
Maune, JD
McHardy, IM
Miller, HR
Molina, SN
Morozova, DA
Scott, T
Taylor, BW
Tornikoski, M
Troitsky, IS
Thum, C
Walker, G
Williamson, KE
Sallum, S
Consiglio, S
Strelnitski, V
AF Jorstad, Svetlana G.
Marscher, Alan P.
Smith, Paul S.
Larionov, Valeri M.
Agudo, Ivan
Gurwell, Mark
Wehrle, Ann E.
Lahteenmaki, Anne
Nikolashvili, Maria G.
Schmidt, Gary D.
Arkharov, Arkady A.
Blinov, Dmitry A.
Blumenthal, Kelly
Casadio, Carolina
Chigladze, Revaz A.
Efimova, Natalia V.
Eggen, Joseph R.
Gomez, Jose L.
Grupe, Dirk
Hagen-Thorn, Vladimir A.
Joshi, Manasvita
Kimeridze, Givi N.
Konstantinova, Tatiana S.
Kopatskaya, Evgenia N.
Kurtanidze, Omar M.
Kurtanidze, Sofia O.
Larionova, Elena G.
Larionova, Liudmilla V.
Sigua, Lorand A.
MacDonald, Nicholas R.
Maune, Jeremy D.
McHardy, Ian M.
Miller, H. Richard
Molina, Sol N.
Morozova, Daria A.
Scott, Terri
Taylor, Brian W.
Tornikoski, Merja
Troitsky, Ivan S.
Thum, Clemens
Walker, Gary
Williamson, Karen E.
Sallum, Stephanie
Consiglio, Santina
Strelnitski, Vladimir
TI A TIGHT CONNECTION BETWEEN GAMMA-RAY OUTBURSTS AND PARSEC-SCALE JET
ACTIVITY IN THE QUASAR 3C 454.3
SO ASTROPHYSICAL JOURNAL
LA English
DT Article
DE galaxies: active; galaxies: jets; quasars: individual (3C 454.3);
techniques: interferometric; techniques: photometric; techniques:
polarimetric
ID SPACE-TELESCOPE OBSERVATIONS; BASE-LINE ARRAY; GALACTIC NUCLEI;
RELATIVISTIC JETS; RADIO-SOURCES; BL-LACERTAE; POLARIMETRIC
OBSERVATIONS; BRIGHT BLAZARS; 2009 DECEMBER; MULTIWAVELENGTH
OBSERVATIONS
AB We analyze the multi-frequency behavior of the quasar 3C 454.3 during three prominent gamma-ray outbursts: 2009 Autumn, 2010 Spring, and 2010 Autumn. The data reveal a repeating pattern, including a triple flare structure, in the properties of each gamma-ray outburst, which implies similar mechanism(s) and location for all three events. The multi-frequency behavior indicates that the lower frequency events are co-spatial with the gamma-ray outbursts, although the gamma-ray emission varies on the shortest timescales. We determine that the variability from UV to IR wavelengths during an outburst results from a single synchrotron component whose properties do not change significantly over the different outbursts. Despite a general increase in the degree of optical linear polarization during an outburst, the polarization drops significantly at the peak of the gamma-ray event, which suggests that both shocks and turbulent processes are involved. We detect two disturbances (knots) with superluminal apparent speeds in the parsec-scale jet associated with the outbursts in 2009 Autumn and 2010 Autumn. The kinematic properties of the knots can explain the difference in amplitudes of the gamma-ray events, while their millimeter-wave polarization is related to the optical polarization during the outbursts. We interpret the multi-frequency behavior within models involving either a system of standing conical shocks or magnetic reconnection events located in the parsec-scale millimeter-wave core of the jet. We argue that gamma-ray outbursts with variability timescales as short as similar to 3 hr can occur on parsec scales if flares take place in localized regions such as turbulent cells.
C1 [Jorstad, Svetlana G.; Marscher, Alan P.; Agudo, Ivan; Blumenthal, Kelly; Joshi, Manasvita; MacDonald, Nicholas R.; Scott, Terri; Taylor, Brian W.; Williamson, Karen E.] Boston Univ, Inst Astrophys Res, Boston, MA 02215 USA.
[Jorstad, Svetlana G.; Larionov, Valeri M.; Blinov, Dmitry A.; Efimova, Natalia V.; Hagen-Thorn, Vladimir A.; Konstantinova, Tatiana S.; Kopatskaya, Evgenia N.; Larionova, Elena G.; Larionova, Liudmilla V.; Morozova, Daria A.; Troitsky, Ivan S.] St Petersburg State Univ, Astron Inst, St Petersburg 198504, Russia.
[Smith, Paul S.] Univ Arizona, Steward Observ, Tucson, AZ 85721 USA.
[Larionov, Valeri M.; Arkharov, Arkady A.; Efimova, Natalia V.] RAS, Main Pulkovo Astron Observ, St Petersburg 196140, Russia.
[Larionov, Valeri M.; Hagen-Thorn, Vladimir A.] Isaac Newton Inst Chile, St Petersburg Branch, St Petersburg, Russia.
[Agudo, Ivan; Casadio, Carolina; Gomez, Jose L.; Molina, Sol N.] CSIC, Inst Astrofis Andalucia, E-18080 Granada, Spain.
[Gurwell, Mark] Harvard Smithsonian Ctr Astrophys, Cambridge, MA 02138 USA.
[Wehrle, Ann E.] Space Sci Inst, Boulder, CO 80301 USA.
[Lahteenmaki, Anne; Tornikoski, Merja] Aalto Univ Metsahovi Radio Observ, FIN-02540 Kylmala, Finland.
[Nikolashvili, Maria G.; Chigladze, Revaz A.; Kimeridze, Givi N.; Kurtanidze, Omar M.; Kurtanidze, Sofia O.; Sigua, Lorand A.] Abastumani Astrophys Observ, Mt Kanobili, Abastumani, Rep of Georgia.
[Schmidt, Gary D.] Natl Sci Fdn, Arlington, VA 22230 USA.
[Eggen, Joseph R.; Maune, Jeremy D.; Miller, H. Richard] Georgia State Univ, Dept Phys & Astron, Atlanta, GA 30303 USA.
[Grupe, Dirk] Penn State Univ, Dept Astron & Astrophys, Davey Lab 525, University Pk, PA 16802 USA.
[McHardy, Ian M.] Univ Southampton, Dept Phys & Astron, Southampton SO17 1BJ, Hants, England.
[Taylor, Brian W.] Lowell Observ, Flagstaff, AZ 86001 USA.
[Thum, Clemens] IRAM, E-18012 Granada, Spain.
[Walker, Gary; Sallum, Stephanie; Consiglio, Santina; Strelnitski, Vladimir] Maria Mitchell Observ, Nantucket, MA 02554 USA.
[Sallum, Stephanie] MIT, EAPS, Cambridge, MA 02139 USA.
[Consiglio, Santina] Calif State Univ Los Angeles, Dept Phys & Astron, Los Angeles, CA USA.
RP Jorstad, SG (reprint author), Boston Univ, Inst Astrophys Res, 725 Commonwealth Ave, Boston, MA 02215 USA.
EM jorstad@bu.edu
RI Blinov, Dmitry/G-9925-2013; Lahteenmaki, Anne/L-5987-2013; Kurtanidze,
Omar/J-6237-2014; Molina, Sol Natalia/F-9968-2015; Agudo,
Ivan/G-1701-2015; Larionov, Valeri/H-1349-2013; Morozova,
Daria/H-1298-2013; Larionova, Elena/H-7287-2013; Troitskiy,
Ivan/K-7979-2013; Jorstad, Svetlana/H-6913-2013; Grishina,
Tatiana/H-6873-2013; Hagen-Thorn, Vladimir/H-3983-2013; Kopatskaya,
Evgenia/H-4720-2013;
OI Blinov, Dmitry/0000-0003-0611-5784; Molina, Sol
Natalia/0000-0002-4112-2157; Agudo, Ivan/0000-0002-3777-6182; Larionov,
Valeri/0000-0002-4640-4356; Morozova, Daria/0000-0002-9407-7804;
Larionova, Elena/0000-0002-2471-6500; Troitskiy,
Ivan/0000-0002-4218-0148; Jorstad, Svetlana/0000-0001-9522-5453;
Grishina, Tatiana/0000-0002-3953-6676; Hagen-Thorn,
Vladimir/0000-0002-6431-8590; Kopatskaya, Evgenia/0000-0001-9518-337X;
Larionova, Liudmila/0000-0002-0274-1481; Smith, Paul/0000-0002-5083-3663
FU NASA [NNX08AV65G, NNX10AO59G, NNX10AU15G, NNX11AO37G, NNX11AQ03G,
NNX10AF88G, NNX08AW56G, NNX09AU93G, Herschel RSA 1427799, NNX11AAO85G,
NAS5-00136]; NSF; BU; Lowell Observatory; UK Science and Technology
Facilities Council; RFBR [12-02-00452, 12-02-31193]; Spanish Ministry of
Economy and Competitiveness and the Regional Government of Andalucia
(Spain) [AYA2010-14844, P09-FQM-4784]; Smithsonian Institution; Academia
Sinica; Georgian National Science Foundation [GNSF/ST09/4-521];
INSU/CNRS (France); MPG (Germany); IGN (Spain); Academy of Finland
FX The research at Boston University (BU) was funded in part by NASA Fermi
Guest Investigator grants NNX08AV65G, NNX10AO59G, NNX10AU15G,
NNX11AO37G, and NNX11AQ03G and Swift Guest Investigator grant
NNX10AF88G. The VLBA is operated by the National Radio Astronomy
Observatory. The National Radio Astronomy Observatory is a facility of
the National Science Foundation operated under cooperative agreement by
Associated Universities, Inc. The PRISM camera at Lowell Observatory was
developed by K. Janes et al. at BU and Lowell Observatory, with funding
from the NSF, BU, and Lowell Observatory. The Liverpool Telescope is
operated on the island of La Palma by Liverpool John Moores University
in the Spanish Observatorio del Roque de los Muchachos of the Instituto
de Astrofisica de Canarias, with funding from the UK Science and
Technology Facilities Council. The effort at Steward Observatory was
funded in part by NASA through Fermi Guest Investigator grant NNX08AW56G
and NNX09AU93G. The St. Petersburg State University team acknowledges
support from RFBR grants 12-02-00452 and 12-02-31193. The research at
the IAA-CSIC is supported by the Spanish Ministry of Economy and
Competitiveness and the Regional Government of Andalucia (Spain) through
grants AYA2010-14844 and P09-FQM-4784, respectively. A. Wehrle
acknowledges Guest Investigator support from NASA via Herschel RSA
1427799 and Fermi Guest Investigator grant NNX11AAO85G. The
Submillimeter Array is a joint project between the Smithsonian
Astrophysical Observatory and the Academia Sinica Institute of Astronomy
and Astrophysics, and is funded by the Smithsonian Institution and the
Academia Sinica. The Abastumani team thanks the Georgian National
Science Foundation for support through grant GNSF/ST09/4-521. The Swift
effort at PSU is supported by NASA contract NAS5-00136. The Calar Alto
Observatory is jointly operated by the Max-Planck-Institut fur
Astronomie and the Instituto de Astrofisica de Andalucia-CSIC. The IRAM
30 m telescope is supported by INSU/CNRS (France), MPG (Germany), and
IGN (Spain). The Metsahovi team acknowledges support from the Academy of
Finland. This study is partly based on data taken and assembled by the
WEBT collaboration and stored in the WEBT archive at the Osservatorio
Astronomico di Torino-INAF (http://www.oato.inaf.it/blazars/webt/). This
paper has made use of up-to-date SMARTS optical/near-infrared light
curves that are available at www.astro.yale.edu/smarts/glast/home.php.
NR 94
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PA TEMPLE CIRCUS, TEMPLE WAY, BRISTOL BS1 6BE, ENGLAND
SN 0004-637X
J9 ASTROPHYS J
JI Astrophys. J.
PD AUG 20
PY 2013
VL 773
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AR 147
DI 10.1088/0004-637X/773/2/147
PG 27
WC Astronomy & Astrophysics
SC Astronomy & Astrophysics
GA 205EU
UT WOS:000323426100066
ER
PT J
AU Naoz, S
Kocsis, B
Loeb, A
Yunes, N
AF Naoz, Smadar
Kocsis, Bence
Loeb, Abraham
Yunes, Nicolas
TI RESONANT POST-NEWTONIAN ECCENTRICITY EXCITATION IN HIERARCHICAL
THREE-BODY SYSTEMS
SO ASTROPHYSICAL JOURNAL
LA English
DT Article
DE pulsars: general; stars: evolution; stars: kinematics and dynamics
ID SUPERMASSIVE BLACK-HOLES; KOZAI MECHANISM; HOT JUPITERS;
GRAVITATIONAL-WAVES; GLOBULAR-CLUSTERS; SECULAR EVOLUTION; ACCRETION
DISKS; GALACTIC NUCLEI; TIDAL FRICTION; TRIPLE-SYSTEMS
AB We study the secular, hierarchical three-body problem to first-order in a post-Newtonian expansion of general relativity (GR). We expand the first-order post-Newtonian Hamiltonian to leading-order in the ratio of the semi-major axis of the two orbits. In addition to the well-known terms that correspond to the GR precession of the inner and outer orbits, we find a new secular post-Newtonian interaction term that can affect the long-term evolution of the triple. We explore the parameter space for highly inclined and eccentric systems, where the Kozai-Lidov mechanism can produce large-amplitude oscillations in the eccentricities. The standard lore, i.e., that GR effects suppress eccentricity, is only consistent with the parts of phase space where the GR timescales are several orders of magnitude shorter than the secular Newtonian one. In other parts of phase space, however, post-Newtonian corrections combined with the three-body ones can excite eccentricities. In particular, for systems where the GR timescale is comparable to the secular Newtonian timescales, the three-body interactions give rise to a resonant-like eccentricity excitation. Furthermore, for triples with a comparable-mass inner binary, where the eccentric Kozai-Lidov mechanism is suppressed, post-Newtonian corrections can further increase the eccentricity and lead to orbital flips even when the timescale of the former is much longer than the timescale of the secular Kozai-Lidov quadrupole perturbations.
C1 [Naoz, Smadar; Kocsis, Bence; Loeb, Abraham] Harvard Smithsonian Ctr Astrophys, Inst Theory & Computat, Cambridge, MA 02138 USA.
[Naoz, Smadar] Northwestern Univ, CIERA, Evanston, IL 60208 USA.
[Yunes, Nicolas] Montana State Univ, Dept Phys, Bozeman, MT 59718 USA.
RP Naoz, S (reprint author), Harvard Smithsonian Ctr Astrophys, Inst Theory & Computat, 60 Garden St, Cambridge, MA 02138 USA.
EM snaoz@cfa.harvard.edu
RI Kocsis, Bence/C-3061-2013;
OI Kocsis, Bence/0000-0002-4865-7517; Naoz, Smadar/0000-0002-9802-9279
FU NASA [PF2-130096, NNX08AL43G, NNA09DB30A, NNX11AI49G, PF9-00063];
Chandra X-Ray Center; NSF [PHY-1114374, AST-0907890]; National
Aeronautics Space Administration [NAS8-03060]
FX We thank Alessandra Buonanno, Fred Rasio, and Gongjie Li for useful
discussions, and we also thank Cole Miller for carefully reading the
first draft of the paper and sending useful comments. We thank our
anonymous referee for useful remarks. We thank Yoram Lithwick for the
use of his allocation time on the computer cluster Quest. This research
was supported in part through the computational resources and staff
contributions provided by Information Technology at Northwestern
University as part of its shared cluster program, Quest. S.N.
acknowledge partial supported by NASA through an Einstein Post-doctoral
Fellowship awarded by the Chandra X-Ray Center, which is operated by the
Smithsonian Astrophysical Observatory for NASA under contract
PF2-130096. This work was supported in part by NSF grant PHY-1114374 and
AST-0907890, as well as NASA grants NNX08AL43G and NNA09DB30A and
NNX11AI49G. B.K. acknowledges support from NASA through Einstein
Postdoctoral Fellowship Award No. PF9-00063 issued by the Chandra X-Ray
Observatory Center, which is operated by the Smithsonian Astrophysical
Observatory for and on behalf of the National Aeronautics Space
Administration under contract NAS8-03060. N.Y. also thanks the Institute
for Theory and Computation at the Harvard Smithsonian Center for
Astrophysics for their hospitality.
NR 78
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U2 4
PU IOP PUBLISHING LTD
PI BRISTOL
PA TEMPLE CIRCUS, TEMPLE WAY, BRISTOL BS1 6BE, ENGLAND
SN 0004-637X
EI 1538-4357
J9 ASTROPHYS J
JI Astrophys. J.
PD AUG 20
PY 2013
VL 773
IS 2
AR 187
DI 10.1088/0004-637X/773/2/187
PG 16
WC Astronomy & Astrophysics
SC Astronomy & Astrophysics
GA 205EU
UT WOS:000323426100106
ER
PT J
AU Paterno-Mahler, R
Blanton, EL
Randall, SW
Clarke, TE
AF Paterno-Mahler, R.
Blanton, E. L.
Randall, S. W.
Clarke, T. E.
TI DEEP CHANDRA OBSERVATIONS OF THE EXTENDED GAS SLOSHING SPIRAL IN A2029
SO ASTROPHYSICAL JOURNAL
LA English
DT Article
DE galaxies: clusters: general; galaxies: clusters: individual (A2029);
galaxies: clusters: intracluster medium; X-rays: galaxies: clusters
ID KELVIN-HELMHOLTZ INSTABILITIES; RELAXED GALAXY CLUSTERS; ACTIVE GALACTIC
NUCLEI; COLD FRONTS; COOLING FLOWS; RADIO-SOURCES; XMM-NEWTON; MERGING
CLUSTERS; PERSEUS CLUSTER; ABELL CLUSTERS
AB Recent X-ray observations of galaxy clusters have shown that there is substructure present in the intracluster medium (ICM), even in clusters that are seemingly relaxed. This substructure is sometimes a result of sloshing of the ICM, which occurs in cool core clusters that have been disturbed by an off-axis merger with a sub-cluster or group. We present deep Chandra observations of the cool core cluster Abell 2029, which has a sloshing spiral extending radially outward from the center of the cluster to approximately 400 kpc at its fullest extent-the largest continuous spiral observed to date. We find a surface brightness excess, a temperature decrement, a density enhancement, an elemental abundance enhancement, and a smooth pressure profile in the area of the spiral. The sloshing gas seems to be interacting with the southern lobe of the central radio galaxy, causing it to bend and giving the radio source a wide-angle tail (WAT) morphology. This shows that WATs can be produced in clusters that are relatively relaxed on large scales. We explore the interaction between heating and cooling in the central region of the cluster. Energy injection from the active galactic nucleus is likely insufficient to offset the cooling, and sloshing may be an important additional mechanism in preventing large amounts of gas from cooling to very low temperatures.
C1 [Paterno-Mahler, R.; Blanton, E. L.] Boston Univ, Dept Astron, Boston, MA 02215 USA.
[Paterno-Mahler, R.; Blanton, E. L.] Boston Univ, Inst Astrophys Res, Boston, MA 02215 USA.
[Randall, S. W.] Harvard Smithsonian Ctr Astrophys, Cambridge, MA 02138 USA.
[Clarke, T. E.] Naval Res Lab, Washington, DC 20375 USA.
RP Paterno-Mahler, R (reprint author), Boston Univ, Dept Astron, 725 Commonwealth Ave, Boston, MA 02215 USA.
EM rachelpm@bu.edu; eblanton@bu.edu; srandall@head.cfa.harvard.edu;
tracy.clarke@nrl.navy.mil
RI Blanton, Elizabeth/H-4501-2014;
OI Randall, Scott/0000-0002-3984-4337
FU Alfred P. Sloan Foundation; National Science Foundation; U.S. Department
of Energy Office of Science; University of Arizona; Brazilian
Participation Group; Brookhaven National Laboratory; University of
Cambridge; Carnegie Mellon University; University of Florida; French
Participation Group; German Participation Group; Harvard University;
Instituto de Astrofisica de Canarias; Michigan State/Notre Dame/JINA
Participation Group; Johns Hopkins University; Lawrence Berkeley
National Laboratory; Max Planck Institute for Astrophysics; Max Planck
Institute for Extraterrestrial Physics; New Mexico State University; New
York University; Ohio State University; Pennsylvania State University;
University of Portsmouth; Princeton University; Spanish Participation
Group; University of Tokyo; University of Utah; Vanderbilt University;
University of Virginia; University of Washington; Yale University
FX Funding for SDSS-III has been provided by the Alfred P. Sloan
Foundation, the Participating Institutions, the National Science
Foundation, and the U.S. Department of Energy Office of Science. The
SDSS-III Web site is http://www.sdss3.org/.; SDSS-III is managed by the
Astrophysical Research Consortium for the Participating Institutions of
the SDSS-III Collaboration including the University of Arizona, the
Brazilian Participation Group, Brookhaven National Laboratory,
University of Cambridge, Carnegie Mellon University, University of
Florida, the French Participation Group, the German Participation Group,
Harvard University, the Instituto de Astrofisica de Canarias, the
Michigan State/Notre Dame/JINA Participation Group, Johns Hopkins
University, Lawrence Berkeley National Laboratory, Max Planck Institute
for Astrophysics, Max Planck Institute for Extraterrestrial Physics, New
Mexico State University, New York University, Ohio State University,
Pennsylvania State University, University of Portsmouth, Princeton
University, the Spanish Participation Group, University of Tokyo,
University of Utah, Vanderbilt University, University of Virginia,
University of Washington, and Yale University.
NR 60
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U1 0
U2 4
PU IOP PUBLISHING LTD
PI BRISTOL
PA TEMPLE CIRCUS, TEMPLE WAY, BRISTOL BS1 6BE, ENGLAND
SN 0004-637X
J9 ASTROPHYS J
JI Astrophys. J.
PD AUG 20
PY 2013
VL 773
IS 2
AR 114
DI 10.1088/0004-637X/773/2/114
PG 13
WC Astronomy & Astrophysics
SC Astronomy & Astrophysics
GA 205EU
UT WOS:000323426100033
ER
PT J
AU Shen, CC
Reeves, KK
Raymond, JC
Murphy, NA
Ko, YK
Lin, J
Mikic, Z
Linker, JA
AF Shen, Chengcai
Reeves, Katharine K.
Raymond, John C.
Murphy, Nicholas A.
Ko, Yuan-Kuen
Lin, Jun
Mikic, Zoran
Linker, Jon A.
TI NON-EQUILIBRIUM IONIZATION MODELING OF THE CURRENT SHEET IN A SIMULATED
SOLAR ERUPTION
SO ASTROPHYSICAL JOURNAL
LA English
DT Article
DE atomic processes; magnetic reconnection; Sun: coronal mass ejections
(CMEs); Sun: UV radiation
ID CORONAL MASS EJECTION; MAGNETIC RECONNECTION; ULTRAVIOLET-SPECTRA; SOHO
OBSERVATIONS; CHARGE STATES; PLASMA; FLARES; EVOLUTION; FEATURES;
SPECTROMETER
AB The current sheet that extends from the top of flare loops and connects to an associated flux rope is a common structure in models of coronal mass ejections (CMEs). To understand the observational properties of CME current sheets, we generated predictions from a flare/CME model to be compared with observations. We use a simulation of a large-scale CME current sheet previously reported by Reeves et al. This simulation includes ohmic and coronal heating, thermal conduction, and radiative cooling in the energy equation. Using the results of this simulation, we perform time-dependent ionization calculations of the flow in a CME current sheet and construct two-dimensional spatial distributions of ionic charge states for multiple chemical elements. We use the filter responses from the Atmospheric Imaging Assembly (AIA) on the Solar Dynamics Observatory and the predicted intensities of emission lines to compute the count rates for each of the AIA bands. The results show differences in the emission line intensities between equilibrium and non-equilibrium ionization. The current sheet plasma is underionized at low heights and overionized at large heights. At low heights in the current sheet, the intensities of the AIA 94 angstrom and 131 angstrom channels are lower for non-equilibrium ionization than for equilibrium ionization. At large heights, these intensities are higher for non-equilibrium ionization than for equilibrium ionization inside the current sheet. The assumption of ionization equilibrium would lead to a significant underestimate of the temperature low in the current sheet and overestimate at larger heights. We also calculate the intensities of ultraviolet lines and predict emission features to be compared with events from the Ultraviolet Coronagraph Spectrometer on the Solar and Heliospheric Observatory, including a low-intensity region around the current sheet corresponding to this model.
C1 [Shen, Chengcai; Reeves, Katharine K.; Raymond, John C.; Murphy, Nicholas A.] Harvard Smithsonian Ctr Astrophys, Cambridge, MA 02138 USA.
[Shen, Chengcai; Lin, Jun] Chinese Acad Sci, Yunnan Astron Observ, Kunming 650011, Yunnan, Peoples R China.
[Shen, Chengcai] Chinese Acad Sci, Grad Sch, Beijing 100039, Peoples R China.
[Ko, Yuan-Kuen] Naval Res Lab, Div Space Sci, Washington, DC 20375 USA.
[Mikic, Zoran; Linker, Jon A.] Predict Sci Inc PSI, San Diego, CA 92121 USA.
RP Shen, CC (reprint author), Harvard Smithsonian Ctr Astrophys, 60 Garden St, Cambridge, MA 02138 USA.
RI Reeves, Katharine/P-9163-2014; LIN, JUN/B-9890-2017;
OI Murphy, Nicholas/0000-0001-6628-8033
FU NASA [NNX11AB61G, NNH11AQ13I]; NSF SHINE [AGS-1156076]; Program 973
[2011CB811403, 2013CBA01503]; NSFC [11273055]; CAS [KJCX2-EW-T07]; NASA
(Heliophysics theory program); NSF (Frontiers in Earth System Dynamics)
FX The authors appreciate the referee for valuable comments and suggestions
that helped improve this paper. This research was supported by NASA
grant NNX11AB61G, NNH11AQ13I and NSF SHINE grant AGS-1156076 to the
Smithsonian Astrophysical Observatory. This work was also supported by
Program 973 grants 2011CB811403 and 2013CBA01503, NSFC grant 11273055,
and CAS grant KJCX2-EW-T07 to the Yunnan Astronomical Observatory.
J.A.L. and Z.M. were supported by NASA (Heliophysics theory program) and
NSF (Frontiers in Earth System Dynamics).
NR 41
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U1 1
U2 7
PU IOP PUBLISHING LTD
PI BRISTOL
PA TEMPLE CIRCUS, TEMPLE WAY, BRISTOL BS1 6BE, ENGLAND
SN 0004-637X
J9 ASTROPHYS J
JI Astrophys. J.
PD AUG 20
PY 2013
VL 773
IS 2
AR 110
DI 10.1088/0004-637X/773/2/110
PG 11
WC Astronomy & Astrophysics
SC Astronomy & Astrophysics
GA 205EU
UT WOS:000323426100029
ER
PT J
AU Wolk, SJ
Rice, TS
Aspin, C
AF Wolk, Scott J.
Rice, Thomas S.
Aspin, Colin
TI NEAR-INFRARED VARIABILITY AMONG YOUNG STELLAR OBJECTS IN THE STAR
FORMATION REGION CYGNUS OB7
SO ASTROPHYSICAL JOURNAL
LA English
DT Article
DE accretion, accretion disks; infrared: stars; stars: formation; stars:
pre-main sequence; stars: variables: general
ID T-TAURI STARS; ORION NEBULA CLUSTER; SPECTRAL ENERGY-DISTRIBUTIONS;
LOW-MASS STARS; MAGNETOSPHERIC ACCRETION; MOLECULAR CLOUD; INTERSTELLAR
EXTINCTION; PHOTOMETRIC VARIABILITY; CIRCUMSTELLAR DISKS; SPITZER SURVEY
AB We present an analysis of near-infrared time-series photometry in J, H, and K bands for about 100 epochs of a 1 degrees x 1 degrees region of the Lynds 1003/1004 dark cloud in the Cygnus OB7 region. Augmented by data from the Wide-field Infrared Survey Explorer, we identify 96 candidate disk bearing young stellar objects (YSOs) in the region. Of these, 30 are clearly Class I or earlier. Using the Wide-Field Imaging Camera on the United Kingdom Infrared Telescope, we were able to obtain photometry over three observing seasons, with photometric uncertainty better than 0.05 mag down to J approximate to 17. We study detailed light curves and color trajectories of similar to 50 of the YSOs in the monitored field. We investigate the variability and periodicity of the YSOs and find the data are consistent with all YSOs being variable in these wavelengths on timescales of a few years. We divide the variability into four observational classes: (1) stars with periodic variability stable over long timescales, (2) variables which exhibit short-lived cyclic behavior, (3) long-duration variables, and (4) stochastic variables. Some YSO variability defies simple classification. We can explain much of the observed variability as being due to dynamic and rotational changes in the disk, including an asymmetric or changing blocking fraction, changes to the inner disk hole size, as well as changes to the accretion rate. Overall, we find that the Class I: Class II ratio of the cluster is consistent with an age of <1 Myr, with at least one individual, wildly varying source similar to 100,000 yr old. We have also discovered a Class II eclipsing binary system with a period of 17.87 days.
C1 [Wolk, Scott J.; Rice, Thomas S.] Harvard Smithsonian Ctr Astrophys, Cambridge, MA 02138 USA.
[Aspin, Colin] Univ Hawaii, Inst Astron, Hilo, HI 96720 USA.
RP Wolk, SJ (reprint author), Harvard Smithsonian Ctr Astrophys, 60 Garden St, Cambridge, MA 02138 USA.
FU NASA [NAS8-03060]; Spitzer Science Center [1348190]; NSF REU [0757887];
National Aeronautics and Space Administration
FX S.J.W. is supported by NASA contract NAS8-03060 (Chandra). T.S.R. was
supported by grant 1348190 from the Spitzer Science Center. Thanks also
to the NSF REU program for funding part of this research via NSF REU
site grant 0757887. This publication makes use of data products from the
Wide-field Infrared Survey Explorer, which is a joint project of the
University of California, Los Angeles, and the Jet Propulsion
Laboratory/California Institute of Technology, funded by the National
Aeronautics and Space Administration. This research has made use of the
NASA/IPAC Infrared Science Archive, which is operated by the Jet
Propulsion Laboratory, California Institute of Technology, under
contract with the National Aeronautics and Space Administration. The
authors wish to recognize and acknowledge the very significant cultural
role and reverence that the summit of Mauna Kea has always had within
the indigenous Hawaiian community. We are most fortunate to have the
opportunity to conduct observations from this sacred mountain.
NR 54
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U1 0
U2 2
PU IOP PUBLISHING LTD
PI BRISTOL
PA TEMPLE CIRCUS, TEMPLE WAY, BRISTOL BS1 6BE, ENGLAND
SN 0004-637X
J9 ASTROPHYS J
JI Astrophys. J.
PD AUG 20
PY 2013
VL 773
IS 2
AR 145
DI 10.1088/0004-637X/773/2/145
PG 19
WC Astronomy & Astrophysics
SC Astronomy & Astrophysics
GA 205EU
UT WOS:000323426100064
ER
PT J
AU Wyman, K
Redfield, S
AF Wyman, Katherine
Redfield, Seth
TI PROBING OUR HELIOSPHERIC HISTORY. I. HIGH-RESOLUTION OBSERVATIONS OF Na
I AND Ca II ALONG THE SOLAR HISTORICAL TRAJECTORY
SO ASTROPHYSICAL JOURNAL
LA English
DT Article
DE ISM: clouds; ISM: structure; line: profiles; local interstellar matter;
Sun: heliosphere; techniques: spectroscopic
ID LOCAL INTERSTELLAR-MEDIUM; ULTRA-HIGH-RESOLUTION; SCALE
ATOMIC-STRUCTURE; LEO COLD CLOUD; ABSORPTION-LINES; COSMIC-RAYS;
PHYSICAL-PROPERTIES; MAGNETIC-FIELD; 100 PARSECS; MILKY-WAY
AB Over the course of its motion through the Galaxy, our solar system has encountered many interstellar environments of varying characteristics. Interstellar medium (ISM) density variations spanning seven orders of magnitude are commonly seen throughout the general Galactic environment, and a sufficiently dense cloud within this range has the potential to dramatically alter the structure of the heliosphere. We present observations of the ISM environments the Sun has most recently encountered based on high-resolution optical spectra toward nearby stars in the direction of the historical solar trajectory. The data were obtained with the highest-resolution spectrographs available, including the Tull Spectrograph on the Harlan J. Smith Telescope at McDonald Observatory and the Ultra-High-Resolution Facility on the Anglo-Australian Telescope at the Anglo-Australian Observatory. Observations were made of interstellar Na I and Ca II doublet absorption toward 43 bright stars within similar to 500 pc. No absorption is seen out to a distance of 120 pc (consistent with the outer boundary of the Local Bubble), but a complex collection of absorbers is seen in stars beyond 120 pc. While common absorbers are consistently seen in most sight lines, significant spatial variation is also detected, even between closely spaced sight lines. This pervasive evidence of small-scale structure not only speaks to the complexity of the morphology or physical properties of the gas in the ISM, but also emphasizes that dramatic structural changes to the heliosphere are common and it is important to understand the implications of such changes, such as the modulation in the cosmic ray flux, on planets.
C1 [Wyman, Katherine] Harvard Smithsonian Ctr Astrophys, Cambridge, MA 02138 USA.
[Wyman, Katherine; Redfield, Seth] Wesleyan Univ, Dept Astron, Van Vleck Observ, Middletown, CT 06459 USA.
RP Wyman, K (reprint author), Harvard Smithsonian Ctr Astrophys, 60 Garden St, Cambridge, MA 02138 USA.
EM kwyman@cfa.harvard.edu; sredfield@wesleyan.edu
OI Redfield, Seth/0000-0003-3786-3486
NR 91
TC 2
Z9 2
U1 0
U2 3
PU IOP PUBLISHING LTD
PI BRISTOL
PA TEMPLE CIRCUS, TEMPLE WAY, BRISTOL BS1 6BE, ENGLAND
SN 0004-637X
J9 ASTROPHYS J
JI Astrophys. J.
PD AUG 20
PY 2013
VL 773
IS 2
AR 96
DI 10.1088/0004-637X/773/2/96
PG 27
WC Astronomy & Astrophysics
SC Astronomy & Astrophysics
GA 205EU
UT WOS:000323426100015
ER
PT J
AU Van Bocxlaer, B
Hunt, G
AF Van Bocxlaer, Bert
Hunt, Gene
TI Morphological stasis in an ongoing gastropod radiation from Lake Malawi
SO PROCEEDINGS OF THE NATIONAL ACADEMY OF SCIENCES OF THE UNITED STATES OF
AMERICA
LA English
DT Article
DE speciation; rates of evolution; punctuated equilibrium; Viviparidae
ID DARWINS FINCHES; RANDOM-WALKS; PUNCTUATED EQUILIBRIA; PHENOTYPIC
EVOLUTION; ADAPTIVE RADIATION; MEASURING RATES; SELECTION; HISTORY;
MODEL; DIVERSIFICATION
AB Evolutionary processes leading to adaptive radiation regularly occur too fast to be accurately recorded in the fossil record but too slowly to be readily observed in living biota. The study of evolutionary radiations is thereby confronted with an epistemological gap between the timescales and approaches used by neontologists and paleontologists. Here we report on an ongoing radiation of extant Bellamya species (n = 4) from the African Rift Lake Malawi that provides an unusual opportunity to bridge this gap. The substantial molecular differentiation in this monophyletic Bellamya clade has arisen since Late Pleistocene megadroughts in the Malawi Basin caused by climate change. Morphological time-series analysis of a high-resolution, radiocarbon-dated sequence of 22 faunas spanning the Holocene documents stasis up to the middle Holocene in all traits studied (shell height, number of whorls, and two variables obtained from geometric morphometrics). Between deposition of the last fossil fauna (similar to 5 ka) and the present day, a drastic increase in morphological disparity was observed (3.7-5.8 times) associated with an increase in species diversity. Comparison of the rates of morphological evolution obtained from the paleontological time-series with phylogenetic rates indicates that the divergence in two traits could be reconstructed with the slow rates documented in the fossils, that one trait required a rate reduction (stabilizing selection), and the other faster rates (divergent selection). The combined paleontological and comparative approach taken here allows recognition that morphological stasis can be the dominant evolutionary pattern within species lineages, even in very young and radiating clades.
C1 [Van Bocxlaer, Bert; Hunt, Gene] Smithsonian Inst, Natl Museum Nat Hist, Dept Paleobiol, Washington, DC 20013 USA.
[Van Bocxlaer, Bert] Smithsonian Inst, Natl Museum Nat Hist, Dept Invertebrate Zool, Washington, DC 20013 USA.
[Van Bocxlaer, Bert] Univ Ghent, Dept Geol & Soil Sci, Res Unit Palaeontol, B-9000 Ghent, Belgium.
RP Van Bocxlaer, B (reprint author), Smithsonian Inst, Natl Museum Nat Hist, Dept Paleobiol, Washington, DC 20013 USA.
EM vanbocxlaerb@si.edu
RI Hunt, Gene/B-3783-2010; Van Bocxlaer, Bert/N-1965-2016
OI Hunt, Gene/0000-0001-6430-5020; Van Bocxlaer, Bert/0000-0003-2033-326X
FU Flanders Research Foundation; Ghent University Research Council; Academy
of Natural Sciences in Philadelphia; Leopold III-fund; Belgian American
Educational Foundation; Smithsonian Institution
FX We thank the chiefs of Chipalamawamba, Kwitambo, and Kazembe for
allowing us to work in outcrops near their villages; the Cultural and
Museum Centre Karonga for structural support; Friedemann Schrenk,
Harisson Simfukwe, Joseph Tembo, Jacques Verniers, Nore Praet, and Wout
Salenbien for providing assistance in the field; Jon Ablett, Didier Van
den Spiegel, Oliver Sandrock, Thomas Kristensen, Daniel Graf, and Ellen
Strong for providing access to museum specimens; and Roland Schultheiss,
Achilles Gautier, Pieter Kat, Ellen Strong, Thomas Ezard, two anonymous
referees, and the editor for providing constructive discussion. This
work was supported in part by the Flanders Research Foundation, the
Ghent University Research Council, a Jessup Award from the Academy of
Natural Sciences in Philadelphia, the Leopold III-fund, and Fellowships
of the Belgian American Educational Foundation and the Smithsonian
Institution (to B.V.B.).
NR 60
TC 13
Z9 13
U1 2
U2 48
PU NATL ACAD SCIENCES
PI WASHINGTON
PA 2101 CONSTITUTION AVE NW, WASHINGTON, DC 20418 USA
SN 0027-8424
J9 P NATL ACAD SCI USA
JI Proc. Natl. Acad. Sci. U. S. A.
PD AUG 20
PY 2013
VL 110
IS 34
BP 13892
EP 13897
DI 10.1073/pnas.1308588110
PG 6
WC Multidisciplinary Sciences
SC Science & Technology - Other Topics
GA 203DU
UT WOS:000323271400053
PM 23924610
ER
PT J
AU Dupree, AK
Avrett, EH
AF Dupree, A. K.
Avrett, E. H.
TI DIRECT EVALUATION OF THE HELIUM ABUNDANCES IN OMEGA CENTAURI
SO ASTROPHYSICAL JOURNAL LETTERS
LA English
DT Article
DE globular clusters: individual (Omega Centauri); stars: abundances;
stars: atmospheres; stars: individual (LEID 54064, LEID 54084)
ID HORIZONTAL-BRANCH STARS; RED GIANT STARS; GLOBULAR-CLUSTERS; MASS-LOSS;
CHROMOSPHERIC LINE; RGB STARS; FIELD; NGC-2808; OUTFLOW; WIND
AB A direct measure of the helium abundances from the near-infrared transition of He I at 1.08 mu m is obtained for two nearly identical red giant stars in the globular cluster Omega Centauri. One star exhibits the He I line; the line is weak or absent in the other star. Detailed non-local thermal equilibrium semi-empirical models including expansion in spherical geometry are developed to match the chromospheric H alpha, H beta, and Ca Pi K lines, in order to predict the helium profile and derive a helium abundance. The red giant spectra suggest a helium abundance of Y <= 0.22 (LEID 54064) and Y = 0.39-0.44 (LEID 54084) corresponding to a difference in the abundance Delta Y >= 0.17. Helium is enhanced in the giant star (LEID 54084) that also contains enhanced aluminum and magnesium. This direct evaluation of the helium abundances gives observational support to the theoretical conjecture that multiple populations harbor enhanced helium in addition to light elements that are products of high-temperature hydrogen burning. We demonstrate that the 1.08 mu m He I line can yield a helium abundance in cool stars when constraints on the semi-empirical chromospheric model are provided by other spectroscopic features.
C1 [Dupree, A. K.; Avrett, E. H.] Harvard Smithsonian Ctr Astrophys, Cambridge, MA 02138 USA.
RP Dupree, AK (reprint author), Harvard Smithsonian Ctr Astrophys, 60 Garden St, Cambridge, MA 02138 USA.
EM dupree@cfa.harvard.edu; eavrett@cfa.harvard.edu
NR 42
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U1 0
U2 1
PU IOP PUBLISHING LTD
PI BRISTOL
PA TEMPLE CIRCUS, TEMPLE WAY, BRISTOL BS1 6BE, ENGLAND
SN 2041-8205
J9 ASTROPHYS J LETT
JI Astrophys. J. Lett.
PD AUG 20
PY 2013
VL 773
IS 2
AR L28
DI 10.1088/2041-8205/773/2/L28
PG 5
WC Astronomy & Astrophysics
SC Astronomy & Astrophysics
GA 198CO
UT WOS:000322899600011
ER
PT J
AU Alo, D
Correa, C
Arias, C
Cardenas, L
AF Alo, Dominique
Correa, Cristian
Arias, Carlos
Cardenas, Leyla
TI Diversity of Aplochiton Fishes (Galaxiidea) and the Taxonomic
Resurrection of A. marinus
SO PLOS ONE
LA English
DT Article
ID FRESH-WATER FISHES; SPECIES DELIMITATION; DNA BARCODES; PATAGONIAN
LAKES; FALKLAND ISLANDS; GALAXIOID FISHES; ZEBRA TELEOSTEI; GLACIAL
CYCLES; POPULATION; JENYNS
AB Aplochiton is a small genus of galaxiid fishes endemic to Patagonia and the Falkland Islands whose taxonomy is insufficiently resolved. Recent genetic analyses confirmed the existence of only two closely related species, Aplochiton taeniatus and Aplochiton zebra, while a third controversial species, Aplochiton marinus, remained lost to synonymy with A. taeniatus. Using an integrative taxonomy framework, we studied original samples and published sequences from a broad range in western Patagonia and the Falkland Islands, and generated robust species hypotheses based on single-locus (Cytochrome Oxidase subunit I; COI) species-delineation methods and known diagnostic morphological characters analyzed in a multivariate context. Results revealed three distinct evolutionary lineages that morphologically resemble, in important respects, existing nominal species descriptions. Interestingly, the lineage associated with A. marinus was unambiguously identifiable (100% accuracy) both from the genetic and morphological viewpoints. In contrast, the morphology of A. taeniatus and A. zebra overlapped substantially, mainly due to the high variability of A. taeniatus. Discriminant function analysis aided the identification of these species with 83.9% accuracy. Hence, for their unambiguous identification, genetic screening is needed. A. marinus has seldom been documented, and when recorded, it has always been found in sites with clear marine influence. It is possible that only A. marinus preserves a life cycle related to the sea akin to the hypothesized ancestral galaxiid. We did not find evidence of claimed diadromy in A. taeniatus or A. zebra, and, therefore, these should be regarded as freshwater species. Finally, a lack of phylogeographic patterns and overrepresentation of uncommon haplotypes suggested demographic expansions in recent evolutionary time, especially of A. zebra, in line with the hypothesis of large-scale range expansion and lineage spread in western Patagonia.
C1 [Alo, Dominique] Univ Austral Chile, Fac Ciencias Forestales & Recursos Nat, Inst Conservac Biodiversidad & Terr, Valdivia, Chile.
[Correa, Cristian; Arias, Carlos] McGill Univ, Dept Biol, Montreal, PQ H3A 1B1, Canada.
[Correa, Cristian; Arias, Carlos] McGill Univ, Redpath Museum, Montreal, PQ H3A 2K6, Canada.
[Arias, Carlos] Smithsonian Trop Res Inst, Panama City, Panama.
[Cardenas, Leyla] Univ Austral Chile, Fac Ciencias, Inst Ciencias Ambientales & Evolut, Valdivia, Chile.
RP Alo, D (reprint author), Univ Austral Chile, Fac Ciencias Forestales & Recursos Nat, Inst Conservac Biodiversidad & Terr, Valdivia, Chile.
EM dominiquealo@gmail.com; cristiancorrea@gmail.com
OI Arias, Carlos Francisco/0000-0001-5925-0985
FU National Geographic Society (CRE grant) [8624-09]; International
Development Research Centre (LACREG grant); Fondo de Investigacion
Cientifica y Tecnica (FONDECYT) [11080068]; McGill School of
Environment; Mejoramento Calidad y Equidad de la Educacion Superior
(MECESUP) [AUS0703]; Comision Nacional de Investigacion Cientifica y
Tecnologica (CONICYT); STRI; Biology department of McGill University
FX This research was possible thanks to the financial support from National
Geographic Society (CRE grant No. 8624-09), International Development
Research Centre (LACREG grant), Fondo de Investigacion Cientifica y
Tecnica (FONDECYT No. 11080068), and McGill School of Environment.
During the course of this study, DA received a doctoral fellowship from
Mejoramento Calidad y Equidad de la Educacion Superior (MECESUP, Project
AUS0703), CC held a scholarship from Comision Nacional de Investigacion
Cientifica y Tecnologica (CONICYT), and CA received fellowships from
STRI and the Biology department of McGill University. The funders had no
role in study design, data collection and analysis, decision to publish,
or preparation of the manuscript.
NR 83
TC 7
Z9 7
U1 0
U2 27
PU PUBLIC LIBRARY SCIENCE
PI SAN FRANCISCO
PA 1160 BATTERY STREET, STE 100, SAN FRANCISCO, CA 94111 USA
SN 1932-6203
J9 PLOS ONE
JI PLoS One
PD AUG 19
PY 2013
VL 8
IS 8
AR e71577
DI 10.1371/journal.pone.0071577
PG 11
WC Multidisciplinary Sciences
SC Science & Technology - Other Topics
GA 205ER
UT WOS:000323425700071
PM 23977079
ER
PT J
AU Gagne, RJ
AF Gagne, Raymond J.
TI Four new genera of Nearctic Cecidomyiidae (Diptera) for species
previously incorrectly placed
SO ZOOTAXA
LA English
DT Article
DE gall midges; conifers; Lasiopteridi; Dasineurini; Ledomyiini
ID GALL MIDGES DIPTERA; BIOLOGY; MYRTACEAE
AB Four new genera belonging to the tribe Dasineurini (Diptera: Cecidomyiidae: Lasiopteridi) are described for previously incorrectly placed species. The new genera are: Cembrotia Gagne, type species Janetiella coloradensis Felt; Cupressatia Gagne, type-species Janetiella siskiyou Felt; Strobilotia Gagne, type species Phytophaga carpophaga Tripp; and Rhizocecis Gagne, type species Cecidomyia rhois Coquillett. Resulting new combinations are: Cembrotia coloradensis (Felt), Cupressatia siskiyou (Felt), Cupressatia thujae (Hedlin), Strobilotia carpophaga (Tripp) and Rhizocecis rhois (Coquillett).
C1 ARS, Systemat Entomol Lab, PSI, USDA,Smithsonian Inst, Washington, DC 20013 USA.
RP Gagne, RJ (reprint author), ARS, Systemat Entomol Lab, PSI, USDA,Smithsonian Inst, MRC 168,POB 37012, Washington, DC 20013 USA.
EM raymond.gagne@ars.usda.gov
NR 19
TC 0
Z9 1
U1 0
U2 1
PU MAGNOLIA PRESS
PI AUCKLAND
PA PO BOX 41383, AUCKLAND, ST LUKES 1030, NEW ZEALAND
SN 1175-5326
J9 ZOOTAXA
JI Zootaxa
PD AUG 19
PY 2013
VL 3701
IS 2
BP 148
EP 158
PG 11
WC Zoology
SC Zoology
GA 201NS
UT WOS:000323148900002
PM 26191576
ER
PT J
AU Kiso, WK
Selvaraj, V
Nagashima, J
Asano, A
Brown, JL
Schmitt, DL
Leszyk, J
Travis, AJ
Pukazhenthi, BS
AF Kiso, Wendy K.
Selvaraj, Vimal
Nagashima, Jennifer
Asano, Atsushi
Brown, Janine L.
Schmitt, Dennis L.
Leszyk, John
Travis, Alexander J.
Pukazhenthi, Budhan S.
TI Lactotransferrin in Asian Elephant (Elephas maximus) Seminal Plasma
Correlates with Semen Quality
SO PLOS ONE
LA English
DT Article
ID FERTILITY-ASSOCIATED PROTEIN; ALKALINE-PHOSPHATASE; SPERM MOTILITY;
CREATINE-PHOSPHATE; MURINE SPERMATOZOA; LOXODONTA-AFRICANA; STALLION
SEMEN; LACTOFERRIN; PARAMETERS; IDENTIFICATION
AB Asian elephants (Elephas maximus) have highly variable ejaculate quality within individuals, greatly reducing the efficacy of artificial insemination and making it difficult to devise a sperm cryopreservation protocol for this endangered species. Because seminal plasma influences sperm function and physiology, including sperm motility, the objectives of this study were to characterize the chemistry and protein profiles of Asian elephant seminal plasma and to determine the relationships between seminal plasma components and semen quality. Ejaculates exhibiting good sperm motility (>= 65%) expressed higher percentages of spermatozoa with normal morphology (80.3 +/- 13.0 vs. 44.9 +/- 30.8%) and positive Spermac staining (51.9 +/- 14.5 vs. 7.5 +/- 14.4%), in addition to higher total volume (135.1 +/- 89.6 vs. 88.8 +/- 73.1 ml) and lower sperm concentration (473.0 +/- 511.2 vs. 1313.8 +/- 764.7x10(6) cells ml(-1)) compared to ejaculates exhibiting poor sperm motility (<= 10%; P<0.05). Comparison of seminal plasma from ejaculates with good versus poor sperm motility revealed significant differences in concentrations of creatine phosphokinase, alanine aminotransferase, phosphorus, sodium, chloride, magnesium, and glucose. These observations suggest seminal plasma influences semen quality in elephants. One-and two-dimensional (2D) gel electrophoresis revealed largely similar compositional profiles of seminal plasma proteins between good and poor motility ejaculates. However, a protein of similar to 80 kDa was abundant in 85% of ejaculates with good motility, and was absent in 90% of poor motility ejaculates (P<0.05). We used mass spectrometry to identify this protein as lactotransferrin, and immunoblot analysis to confirm this identification. Together, these findings lay a functional foundation for understanding the contributions of seminal plasma in the regulation of Asian elephant sperm motility, and for improving semen collection and storage in this endangered species.
C1 [Kiso, Wendy K.] Smithsonian Conservat Biol Inst, Ctr Species Survival, Washington, DC USA.
[Kiso, Wendy K.] George Mason Univ, Dept Environm Sci & Policy, Fairfax, VA 22030 USA.
[Selvaraj, Vimal] Cornell Univ, Dept Anim Sci, Ithaca, NY 14853 USA.
[Nagashima, Jennifer; Asano, Atsushi; Travis, Alexander J.] Cornell Univ, Coll Vet Med, Baker Inst Anim Hlth, Ithaca, NY 14853 USA.
[Nagashima, Jennifer; Brown, Janine L.; Pukazhenthi, Budhan S.] Smithsonian Conservat Biol Inst, Ctr Species Survival, Front Royal, VA USA.
[Schmitt, Dennis L.] Missouri State Univ, William H Darr Sch Agr, Springfield, MO USA.
[Schmitt, Dennis L.] Ringling Bros Ctr Elephant Conservat, Polk City, FL USA.
[Leszyk, John] Univ Massachusetts, Sch Med, Prote & Mass Spectrometry Facil, Shrewsbury, MA USA.
RP Kiso, WK (reprint author), Smithsonian Conservat Biol Inst, Ctr Species Survival, Natl Zool Pk, Washington, DC USA.
EM wkiso@feldinc.com
FU Feld Entertainment Inc.; International Elephant Foundation; Friends of
the National Zoo; Baker Institute for Animal Health
FX Funding for this study was generously provided by Feld Entertainment
Inc., International Elephant Foundation, Friends of the National Zoo,
and the Baker Institute for Animal Health. Wendy Kiso was supported by a
grant from Feld Entertainment, Inc. The funders had no role in study
design, data collection and analysis, decision to publish, or
preparation of the manuscript.
NR 78
TC 5
Z9 5
U1 0
U2 18
PU PUBLIC LIBRARY SCIENCE
PI SAN FRANCISCO
PA 1160 BATTERY STREET, STE 100, SAN FRANCISCO, CA 94111 USA
SN 1932-6203
J9 PLOS ONE
JI PLoS One
PD AUG 16
PY 2013
VL 8
IS 8
AR e71033
DI 10.1371/journal.pone.0071033
PG 11
WC Multidisciplinary Sciences
SC Science & Technology - Other Topics
GA 207BA
UT WOS:000323570200016
PM 23976974
ER
PT J
AU Montaser, R
Paul, VJ
Luesch, H
AF Montaser, Rana
Paul, Valerie J.
Luesch, Hendrik
TI Modular Strategies for Structure and Function Employed by Marine
Cyanobacteria: Characterization and Synthesis of Pitinoic Acids
SO ORGANIC LETTERS
LA English
DT Article
ID PSEUDOMONAS-AERUGINOSA; GENE-EXPRESSION; THP-1 CELLS; SILYL ETHERS;
INFECTION; INFLAMMATION; MACROPHAGES; CYTOKINES; OXIDATION; MOLECULE
AB Novel bioactive lipids were identified from a Guamanian cyanobacterium, the Pseudomonas aeruginosa quorum sensing inhibitor pitinoic acid A (1) and the anti-inflammatory pitinoic acids B (2) and C. The structure of 2 was confirmed by synthesis, which also allowed for biological evaluation. Since 2 is an ester of pitinoic acids A and C, it represents a prodrug strategy to liberate dual biological activity for the management of P. aeruginosa infections and their associated inflammation.
C1 [Montaser, Rana; Luesch, Hendrik] Univ Florida, Dept Med Chem, Gainesville, FL 32610 USA.
[Paul, Valerie J.] Smithsonian Marine Stn, Ft Pierce, FL 34949 USA.
RP Luesch, H (reprint author), Univ Florida, Dept Med Chem, Gainesville, FL 32610 USA.
EM luesch@cop.ufl.edu
FU National Institutes of Health [P41GM086210, R01CA172310]
FX We thank Dr. Qi-Yin Chen (Department of Medicinal Chemistry, University
of Florida) for helpful discussions regarding the synthetic procedures
and Dr. Sarath Gunasekera and Vicky Pittman (Smithsonian Marine Station)
for providing additional amounts of pitinoic acid A. We thank J. R.
Rocca (AMRIS, McKnight Brain Institute, University of Florida) for
technical assistance with NMR data acquisition. This research was
supported by the National Institutes of Health, Grants P41GM086210 and
R01CA172310. This is contribution 916 from the Smithsonian Marine
Station.
NR 29
TC 7
Z9 7
U1 0
U2 15
PU AMER CHEMICAL SOC
PI WASHINGTON
PA 1155 16TH ST, NW, WASHINGTON, DC 20036 USA
SN 1523-7060
EI 1523-7052
J9 ORG LETT
JI Org. Lett.
PD AUG 16
PY 2013
VL 15
IS 16
BP 4050
EP 4053
DI 10.1021/ol401396u
PG 4
WC Chemistry, Organic
SC Chemistry
GA 204KB
UT WOS:000323363100003
PM 23915229
ER
PT J
AU Maruca, BA
Kasper, JC
AF Maruca, B. A.
Kasper, J. C.
TI Improved interpretation of solar wind ion measurements via
high-resolution magnetic field data
SO ADVANCES IN SPACE RESEARCH
LA English
DT Article
DE Solar wind; Ion temperature anisotropy; Wave-particle interactions; Data
analysis; Instrumentation
ID WAVE ACTIVITY; SPACECRAFT; EVOLUTION; PLASMAS
AB The Wind spacecraft's Faraday cups (FC) continue to produce high-quality, in situ observations of thermal protons (i.e., ionized hydrogen) and a-particles (i.e., fully ionized helium) in the solar wind. By fitting a Wind/FC ion spectrum with a model velocity distribution function (VDF) for each particle species, values for density, bulk velocity, and temperature can be inferred. Incorporating measurements of the background magnetic field from the Wind Magnetic Field Investigation (MFI) allows perpendicular and parallel temperature components to be separated. Prior implementations of this analysis averaged the higher-cadence Wind/MFI measurements to match that of the Wind/FC ion spectra. However, this article summarizes recent and extensive revisions to the analysis software that, among other things, eliminate such averaging and thereby account for variations in the direction of the magnetic field over the time taken to measure the ions. A statistical comparison reveals that the old version consistently underestimates the temperature anisotropy of ion VDF's: averaging over fluctuations in the magnetic field essentially blurs the perpendicular and parallel temperature components, which makes the plasma seem artificially more isotropic. The new version not only provides a more accurate dataset of ion parameters (which is well suited to the study of microkinetic phenomena), it also demonstrates a novel technique for jointly processing particle and field data. Such methods are crucial to heliophysics as wave-particle interactions are increasingly seen as playing an important role in the dynamics of the solar wind and similar space plasmas. (C) 2013 COSPAR. Published by Elsevier Ltd. All rights reserved.
C1 [Maruca, B. A.] Univ Calif Berkeley, Space Sci Lab, Berkeley, CA 94720 USA.
[Kasper, J. C.] Harvard Smithsonian Ctr Astrophys, Cambridge, MA 02138 USA.
RP Maruca, BA (reprint author), Univ Calif Berkeley, Space Sci Lab, 7 Gauss Way, Berkeley, CA 94720 USA.
EM bmaruca@ssl.berkeley.edu; jkas-per@cfa.harvard.edu
RI Kasper, Justin/D-1152-2010
OI Kasper, Justin/0000-0002-7077-930X
FU NASA [NNX08AW07G]
FX The authors thank A. Szabo for assistance with Wind/MFI data and
gratefully acknowledge A. J. Lazarus, J. T. Steinberg, M. R. Aellig, and
all who worked on prior versions of the Wind/FC analysis code. Thanks
are also extended to M. L. Stevens and S. D. Bale for fruitful
discussions about this work. The analysis of Wind/FC observations at the
Harvard-Smithsonian Center for Astrophysics (CfA) was supported by NASA
Grant NNX08AW07G. This research has made use of the SAO/NASA
Astrophysics Data System (ADS).
NR 29
TC 5
Z9 5
U1 0
U2 4
PU ELSEVIER SCI LTD
PI OXFORD
PA THE BOULEVARD, LANGFORD LANE, KIDLINGTON, OXFORD OX5 1GB, OXON, ENGLAND
SN 0273-1177
J9 ADV SPACE RES
JI Adv. Space Res.
PD AUG 15
PY 2013
VL 52
IS 4
BP 723
EP 731
DI 10.1016/j.asr.2013.04.006
PG 9
WC Astronomy & Astrophysics; Geosciences, Multidisciplinary; Meteorology &
Atmospheric Sciences
SC Astronomy & Astrophysics; Geology; Meteorology & Atmospheric Sciences
GA 187CG
UT WOS:000322093900017
ER
PT J
AU Gillner, S
Ruger, N
Roloff, A
Berger, U
AF Gillner, Sten
Rueger, Nadja
Roloff, Andreas
Berger, Uta
TI Low relative growth rates predict future mortality of common beech
(Fagus sylvatica L.)
SO FOREST ECOLOGY AND MANAGEMENT
LA English
DT Article
DE Dendrochronology; Mortality predictions; Common beech; Crown decline;
Vitality assessment
ID QUERCUS-ROBUR L.; TREE MORTALITY; DROUGHT; CLIMATE; MODELS; FOREST;
DEATH; RESPONSES; OAKS; PERFORMANCE
AB For many tree species, growth patterns derived from tree-ring time series have been shown to be good indicators of tree mortality. Although tree rings of common beech (Fagus sylvatica) have been widely used to answer complex questions of forest ecology, there are only few studies using growth characteristics, such as growth decline or growth variability, as informative predictors of tree mortality in old-growth beech forests. To do this, we used dendrochronological data of living and dead trees from a nature reserve in eastern Germany. Using a logistic regression model, we predicted tree mortality based on growth characteristics (basal area increment; variance, autocorrelation, mean sensitivity of ring widths; growth trends) over different time horizons. Beech mortality could reliably be predicted up to 20 years in advance on the basis of relative basal area growth. Trees that grew slower in relative basal area than 0.95 cm(2)/cm y on average over a 20-year-period had a much higher mortality risk than faster-growing trees. Other statistical characteristics of the dendrochronological time series, such as the variance or autocorrelation of ring widths, the mean sensitivity or growth trends, did not convey significant additional information and did not lead to better mortality predictions. (C) 2013 Elsevier B.V. All rights reserved.
C1 [Gillner, Sten; Roloff, Andreas] Tech Univ Dresden, Inst Forest Bot & Forest Zool, D-01737 Tharandt, Germany.
[Rueger, Nadja] Univ Leipzig, Dept Systemat Bot & Funct Biodivers, D-04103 Leipzig, Germany.
[Rueger, Nadja] Smithsonian Trop Res Inst, Balboa, Ancon, Panama.
[Berger, Uta] Tech Univ Dresden, Inst Forest Growth & Forest Comp Sci, D-01737 Tharandt, Germany.
RP Gillner, S (reprint author), Tech Univ Dresden, Inst Forest Bot & Forest Zool, Pienner Str 7, D-01737 Tharandt, Germany.
EM gillner@forst.tu-dresden.de
RI Ruger, Nadja/J-6393-2015
OI Ruger, Nadja/0000-0003-2371-4172
FU Bundesministerium fur Bildung und Forschung (BMBF); Deutsche
Forschungsgemeinschaft DFG [RU 1536/2-1]
FX We thank E. Fritzsche for his support in the fieldwork and the staff of
the Institute for Forest Botany and Zoology for their comments on the
manuscript. This study was realized with the financial support by the
Bundesministerium fur Bildung und Forschung (BMBF) in the project
REGKLAM (www.regklam.de). We would like to give special thanks to Mr.
Pielenz and the Umweltamt Dresden for their stimulus and great
commitment to this study. N.R. was funded by a research grant from
Deutsche Forschungsgemeinschaft DFG (RU 1536/2-1).
NR 57
TC 10
Z9 12
U1 6
U2 68
PU ELSEVIER SCIENCE BV
PI AMSTERDAM
PA PO BOX 211, 1000 AE AMSTERDAM, NETHERLANDS
SN 0378-1127
EI 1872-7042
J9 FOREST ECOL MANAG
JI For. Ecol. Manage.
PD AUG 15
PY 2013
VL 302
BP 372
EP 378
DI 10.1016/j.foreco.2013.03.032
PG 7
WC Forestry
SC Forestry
GA 168XN
UT WOS:000320741300039
ER
PT J
AU Burton, MG
Braiding, C
Glueck, C
Goldsmith, P
Hawkes, J
Hollenbach, DJ
Kulesa, C
Martin, CL
Pineda, JL
Rowell, G
Simon, R
Stark, AA
Stutzki, J
Tothill, NJH
Urquhart, JS
Walker, C
Walsh, AJ
Wolfire, M
AF Burton, Michael G.
Braiding, C.
Glueck, C.
Goldsmith, P.
Hawkes, J.
Hollenbach, D. J.
Kulesa, C.
Martin, C. L.
Pineda, J. L.
Rowell, G.
Simon, R.
Stark, A. A.
Stutzki, J.
Tothill, N. J. H.
Urquhart, J. S.
Walker, C.
Walsh, A. J.
Wolfire, M.
TI The Mopra Southern Galactic Plane CO Survey
SO PUBLICATIONS OF THE ASTRONOMICAL SOCIETY OF AUSTRALIA
LA English
DT Article
DE Galaxy: kinematics and dynamics; Galaxy: structure; ISM: clouds; ISM:
molecules; radio lines: ISM; surveys
ID GIANT MOLECULAR CLOUDS; GAMMA-RAY SIGNATURES; MILKY-WAY; STAR-FORMATION;
INTERSTELLAR CLOUDS; CARBON-MONOXIDE; OUTER GALAXY; RING SURVEY; DARK
GAS; EMISSION
AB We present the first results from a new carbon monoxide (CO) survey of the southern Galactic plane being conducted with the Mopra radio telescope in Australia. The (CO)-C-12, (CO)-C-13, and (CO)-O-18 J = 1-0 lines are being mapped over the l = 305 degrees-345 degrees, b= +/- 0.5 degrees portion of the fourth quadrant of the Galaxy, at 35 arcsec spatial and 0.1 km s(-1) spectral resolution. The survey is being undertaken with two principal science objectives: (i) to determine where and how molecular clouds are forming in the Galaxy and (ii) to probe the connection between molecular clouds and the 'missing' gas inferred from gamma-ray observations. We describe the motivation for the survey, the instrumentation and observing techniques being applied, and the data reduction and analysis methodology. In this paper, we present the data from the first degree surveyed, l = 323 degrees-324 degrees, b= +/- 0.5 degrees. We compare the data to the previous CO survey of this region and present metrics quantifying the performance being achieved; the rms sensitivity per 0.1 km s-1 velocity channel is similar to 1.5 K for (CO)-C-12 and similar to 0.7 K for the other lines. We also present some results from the region surveyed, including line fluxes, column densities, molecular masses, (CO)-C-12/(CO)-C-13 line ratios, and (CO)-C-12 optical depths. We also examine how these quantities vary as a function of distance from the Sun when averaged over the 1 square degree survey area. Approximately 2 x 10(6) M-circle dot of molecular gas is found along the G323 sightline, with an average H-2 number density of n(H2) similar to 1 cm(-3) within the Solar circle. The CO data cubes will be made publicly available as they are published.
C1 [Burton, Michael G.; Braiding, C.; Tothill, N. J. H.] Univ New S Wales, Sch Phys, Sydney, NSW 2052, Australia.
[Glueck, C.; Simon, R.; Stutzki, J.] Univ Cologne, Inst Phys 1, KOSMA, D-50937 Cologne, Germany.
[Goldsmith, P.; Pineda, J. L.] CALTECH, Jet Prop Lab, Pasadena, CA 91109 USA.
[Hawkes, J.; Rowell, G.] Univ Adelaide, Sch Chem & Phys, Adelaide, SA 5005, Australia.
[Hollenbach, D. J.] SETI Inst, Carl Sagan Ctr, Mountain View, CA 94043 USA.
[Kulesa, C.; Walker, C.] Univ Arizona, Steward Observ, Tucson, AZ 85721 USA.
[Martin, C. L.] Oberlin Coll, Dept Phys & Astron, Oberlin, OH 44074 USA.
[Stark, A. A.] Harvard Smithsonian Ctr Astrophys, Cambridge, MA 02138 USA.
[Tothill, N. J. H.] Univ Western Sydney, Sch Comp Engn & Math, Penrith, NSW 2751, Australia.
[Urquhart, J. S.] Max Planck Inst Radioastron, D-53121 Bonn, Germany.
[Walsh, A. J.] Curtin Univ, Int Ctr Radio Astron Res, Perth, WA 6845, Australia.
[Wolfire, M.] Univ Maryland, Dept Astron, College Pk, MD 20742 USA.
RP Burton, MG (reprint author), Univ New S Wales, Sch Phys, Sydney, NSW 2052, Australia.
EM m.burton@unsw.edu.au
RI Walsh, Andrew/B-5627-2013;
OI Walsh, Andrew/0000-0001-9506-0855; Burton, Michael/0000-0001-7289-1998;
Rowell, Gavin/0000-0002-9516-1581; Stark, Antony/0000-0002-2718-9996
FU Commonwealth of Australia; Australian Research Council (ARC)
[DP120101585]
FX The Mopra radio telescope is part of the Australia Telescope National
Facility, which is funded by the Commonwealth of Australia for operation
as a National Facility managed by CSIRO. Many staff of the ATNF have
contributed to the success of the remote operations at Mopra. We
particularly wish to acknowledge the contributions of David Brodrick,
Philip Edwards, Brett Hisock, Balt Indermuehle, and Peter Mirtschin. The
University of New South Wales Digital Filter Bank used for the
observations with the Mopra Telescope (the UNSW-MOPS) was provided with
support from the Australian Research Council (ARC). We also acknowledge
ARC support through Discovery Project DP120101585. This work was also
carried out, in part, at the Jet Propulsion Laboratory, California
Institute of Technology. Finally, we thank the anonymous referee whose
comments have helped improve this paper.
NR 65
TC 3
Z9 3
U1 0
U2 5
PU CAMBRIDGE UNIV PRESS
PI NEW YORK
PA 32 AVENUE OF THE AMERICAS, NEW YORK, NY 10013-2473 USA
SN 1323-3580
EI 1448-6083
J9 PUBL ASTRON SOC AUST
JI Publ. Astron. Soc. Aust.
PD AUG 14
PY 2013
VL 30
AR e044
DI 10.1017/pasa.2013.22
PG 28
WC Astronomy & Astrophysics
SC Astronomy & Astrophysics
GA 201UU
UT WOS:000323169300001
ER
PT J
AU Uzdin, R
Dalla Torre, EG
Kosloff, R
Moiseyev, N
AF Uzdin, Raam
Dalla Torre, Emanuele G.
Kosloff, Ronnie
Moiseyev, Nimrod
TI Effects of an exceptional point on the dynamics of a single particle in
a time-dependent harmonic trap
SO PHYSICAL REVIEW A
LA English
DT Article
ID BOSE-EINSTEIN CONDENSATE; COLLECTIVE EXCITATIONS; COHERENT STATES;
QUANTUM-SYSTEMS; OSCILLATOR; DEGENERACIES; HAMILTONIANS; INVARIANTS; GAS
AB The time evolution of a single particle in a harmonic trap with time-dependent frequency omega(t) has been well studied. Nevertheless, here we show that when the harmonic trap is opened (or closed) as a function of time while keeping the adiabatic parameter mu = [d omega(t)/dt]/omega(2)(t) fixed, a sharp transition from an oscillatory to a monotonic exponential dynamics occurs at mu = 2. At this transition point, the time evolution has an exceptional point (EP) at all instants. This situation, where an EP of a time-dependent Hermitian Hamiltonian is obtained at any given time, is very different from other known cases. In the present case, we show that the order of the EP depends on the set of observables used to describe the dynamics. Our finding is relevant to the dynamics of a single ion in a magnetic, optical, or rf trap, and of diluted gases of ultracold atoms in optical traps.
C1 [Uzdin, Raam; Dalla Torre, Emanuele G.; Kosloff, Ronnie; Moiseyev, Nimrod] Harvard Smithsonian Ctr Astrophys, Inst Theoret Atom Mol & Opt Phys, Cambridge, MA 01238 USA.
[Dalla Torre, Emanuele G.] Harvard Univ, Dept Phys, Cambridge, MA 01238 USA.
[Kosloff, Ronnie] Hebrew Univ Jerusalem, Fritz Haber Inst Mol Dynam, Jerusalem, Israel.
[Moiseyev, Nimrod] Technion Israel Inst Technol, Schulich Fac Chem, IL-32000 Haifa, Israel.
[Moiseyev, Nimrod] Technion Israel Inst Technol, Fac Phys, IL-32000 Haifa, Israel.
RP Uzdin, R (reprint author), Hebrew Univ Jerusalem, Dept Phys, Jerusalem, Israel.
RI Kosloff, Ronnie/D-2388-2013;
OI Kosloff, Ronnie/0000-0001-6201-2523; Dalla Torre, Emanuele
G./0000-0002-7219-3804
FU ITAMP
FX We would like to acknowledge ITAMP for their support. This work was
initialized and has been carried out as a result of the friendly and
scientific atmosphere at ITAMP, which encourages informal discussions on
a daily basis among the permanent and visiting members of ITAMP. We
would also like to sincerely thank the anonymous referee for his/her
useful comments.
NR 57
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U1 1
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PU AMER PHYSICAL SOC
PI COLLEGE PK
PA ONE PHYSICS ELLIPSE, COLLEGE PK, MD 20740-3844 USA
SN 1050-2947
J9 PHYS REV A
JI Phys. Rev. A
PD AUG 12
PY 2013
VL 88
IS 2
AR 022505
DI 10.1103/PhysRevA.88.022505
PG 5
WC Optics; Physics, Atomic, Molecular & Chemical
SC Optics; Physics
GA 199YI
UT WOS:000323031400007
ER
PT J
AU Sharifi, A
Kalin, L
Hantush, MM
Isik, S
Jordan, TE
AF Sharifi, Amirreza
Kalin, Latif
Hantush, Mohamed M.
Isik, Sabahattin
Jordan, Thomas E.
TI Carbon dynamics and export from flooded wetlands: A modeling approach
SO ECOLOGICAL MODELLING
LA English
DT Article
DE Wetlands; Model; Carbon; Methane; CH4; DOC; Dissolved organic carbon;
Carbon export; Greenhouse gas emission; Aerobic; Anaerobic; Diffusion;
Ebullition
ID ORGANIC-CARBON; METHANE EMISSIONS; SENSITIVITY ANALYSIS; WATER;
UNCERTAINTY; ECOSYSTEMS; OXIDATION; MATTER; SOIL; VEGETATION
AB Described in this article is development and validation of a process based model for carbon cycling in flooded wetlands, called WetQual-C. The model considers various biogeochemical interactions affecting C cycling, greenhouse gas emissions, organic carbon export and retention. WetQual-C couples carbon cycling with other interrelated geochemical cycles in wetlands, i.e. nitrogen and oxygen; and fully reflects the dynamics of the thin oxidized zone at the soil-water interface. Using field collected data from a small wetland receiving runoff from an agricultural watershed on the eastern shore of Chesapeake Bay, we assessed model performance and carried out a thorough sensitivity and uncertainty analysis to evaluate the credibility of the model. Overall, model performed well in capturing TOC export fluctuations and dynamics from the study wetland. Model results revealed that over a period of 2 years, the wetland removed or retained equivalent to 47 +/- 12% of the OC carbon intake, mostly via DC decomposition and DOC diffusion to sediment. The study wetland appeared as a carbon sink rather than source and proved its purpose as a relatively effective and low cost mean for improving water quality. (C) 2013 Elsevier B.V. All rights reserved.
C1 [Sharifi, Amirreza; Kalin, Latif] Auburn Univ, Sch Forestry & Wildlife Sci, Auburn, AL 36849 USA.
[Hantush, Mohamed M.] US EPA, Land Remediat & Pollut Control Div, Natl Risk Management Res Lab, ORD, Cincinnati, OH 45268 USA.
[Isik, Sabahattin] Turgut Ozal Univ, Fac Engn, Ankara, Turkey.
[Jordan, Thomas E.] Smithsonian Environm Res Ctr, Edgewater, MD 21037 USA.
RP Kalin, L (reprint author), Auburn Univ, Sch Forestry & Wildlife Sci, 602 Duncan Dr, Auburn, AL 36849 USA.
EM Latif@auburn.edu
RI ISIK, Sabahattin/G-5265-2012
FU U.S. Environmental Protection Agency through its Office of Research and
Development [EP08C000066]; Auburn University, School of Forestry and
Wildlife Sciences
FX The U.S. Environmental Protection Agency through its Office of Research
and Development partially funded and collaborated in the research
described here under contract (EP08C000066) with Auburn University,
School of Forestry and Wildlife Sciences. It has not been subject to the
Agency review and therefore does not necessarily reflect the views of
the Agency, and no official endorsement should be inferred.
NR 56
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U1 3
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PU ELSEVIER SCIENCE BV
PI AMSTERDAM
PA PO BOX 211, 1000 AE AMSTERDAM, NETHERLANDS
SN 0304-3800
EI 1872-7026
J9 ECOL MODEL
JI Ecol. Model.
PD AUG 10
PY 2013
VL 263
BP 196
EP 210
DI 10.1016/j.ecolmodel.2013.04.023
PG 15
WC Ecology
SC Environmental Sciences & Ecology
GA 197NJ
UT WOS:000322857600019
ER
PT J
AU Acero, F
Ackermann, M
Ajello, M
Allafort, A
Baldini, L
Ballet, J
Barbiellini, G
Bastieri, D
Bechtol, K
Bellazzini, R
Blandford, RD
Bloom, ED
Bonamente, E
Bottacini, E
Brandt, TJ
Bregeon, J
Brigida, M
Bruel, P
Buehler, R
Buson, S
Caliandro, GA
Cameron, RA
Caraveo, PA
Cecchi, C
Charles, E
Chaves, RCG
Chekhtman, A
Chiang, J
Chiaro, G
Ciprini, S
Claus, R
Cohen-Tanugi, J
Conrad, J
Cutini, S
Dalton, M
D'Ammando, F
de Palma, F
Dermer, CD
Di Venere, L
Silva, EDE
Drell, PS
Drlica-Wagner, A
Falletti, L
Favuzzi, C
Fegan, SJ
Ferrara, EC
Focke, WB
Franckowiak, A
Fukazawa, Y
Funk, S
Fusco, P
Gargano, F
Gasparrini, D
Giglietto, N
Giordano, F
Giroletti, M
Glanzman, T
Godfrey, G
Gregoire, T
Grenier, IA
Grondin, MH
Grove, JE
Guiriec, S
Hadasch, D
Hanabata, Y
Harding, AK
Hayashida, M
Hayashi, K
Hays, E
Hewitt, J
Hill, AB
Horan, D
Hou, X
Hughes, RE
Inoue, Y
Jackson, MS
Jogler, T
Johannesson, G
Johnson, AS
Kamae, T
Kawano, T
Kerr, M
Knodlseder, J
Kuss, M
Lande, J
Larsson, S
Latronico, L
Lemoine-Goumard, M
Longo, F
Loparco, F
Lovellette, MN
Lubrano, P
Marelli, M
Massaro, F
Mayer, M
Mazziotta, MN
McEnery, JE
Mehault, J
Michelson, PF
Mitthumsiri, W
Mizuno, T
Monte, C
Monzani, ME
Morselli, A
Moskalenko, IV
Murgia, S
Nakamori, T
Nemmen, R
Nuss, E
Ohsugi, T
Okumura, A
Orienti, M
Orlando, E
Ormes, JF
Paneque, D
Panetta, JH
Perkins, JS
Pesce-Rollins, M
Piron, F
Pivato, G
Porter, TA
Raino, S
Rando, R
Razzano, M
Reimer, A
Reimer, O
Reposeur, T
Ritz, S
Roth, M
Rousseau, R
Parkinson, PMS
Schulz, A
Sgro, C
Siskind, EJ
Smith, DA
Spandre, G
Spinelli, P
Suson, DJ
Takahashi, H
Takeuchi, Y
Thayer, JG
Thayer, JB
Thompson, DJ
Tibaldo, L
Tibolla, O
Tinivella, M
Torres, DF
Tosti, G
Troja, E
Uchiyama, Y
Vandenbroucke, J
Vasileiou, V
Vianello, G
Vitale, V
Werner, M
Winer, BL
Wood, KS
Yang, Z
AF Acero, F.
Ackermann, M.
Ajello, M.
Allafort, A.
Baldini, L.
Ballet, J.
Barbiellini, G.
Bastieri, D.
Bechtol, K.
Bellazzini, R.
Blandford, R. D.
Bloom, E. D.
Bonamente, E.
Bottacini, E.
Brandt, T. J.
Bregeon, J.
Brigida, M.
Bruel, P.
Buehler, R.
Buson, S.
Caliandro, G. A.
Cameron, R. A.
Caraveo, P. A.
Cecchi, C.
Charles, E.
Chaves, R. C. G.
Chekhtman, A.
Chiang, J.
Chiaro, G.
Ciprini, S.
Claus, R.
Cohen-Tanugi, J.
Conrad, J.
Cutini, S.
Dalton, M.
D'Ammando, F.
de Palma, F.
Dermer, C. D.
Di Venere, L.
do Couto e Silva, E.
Drell, P. S.
Drlica-Wagner, A.
Falletti, L.
Favuzzi, C.
Fegan, S. J.
Ferrara, E. C.
Focke, W. B.
Franckowiak, A.
Fukazawa, Y.
Funk, S.
Fusco, P.
Gargano, F.
Gasparrini, D.
Giglietto, N.
Giordano, F.
Giroletti, M.
Glanzman, T.
Godfrey, G.
Gregoire, T.
Grenier, I. A.
Grondin, M. -H.
Grove, J. E.
Guiriec, S.
Hadasch, D.
Hanabata, Y.
Harding, A. K.
Hayashida, M.
Hayashi, K.
Hays, E.
Hewitt, J.
Hill, A. B.
Horan, D.
Hou, X.
Hughes, R. E.
Inoue, Y.
Jackson, M. S.
Jogler, T.
Johannesson, G.
Johnson, A. S.
Kamae, T.
Kawano, T.
Kerr, M.
Knoedlseder, J.
Kuss, M.
Lande, J.
Larsson, S.
Latronico, L.
Lemoine-Goumard, M.
Longo, F.
Loparco, F.
Lovellette, M. N.
Lubrano, P.
Marelli, M.
Massaro, F.
Mayer, M.
Mazziotta, M. N.
McEnery, J. E.
Mehault, J.
Michelson, P. F.
Mitthumsiri, W.
Mizuno, T.
Monte, C.
Monzani, M. E.
Morselli, A.
Moskalenko, I. V.
Murgia, S.
Nakamori, T.
Nemmen, R.
Nuss, E.
Ohsugi, T.
Okumura, A.
Orienti, M.
Orlando, E.
Ormes, J. F.
Paneque, D.
Panetta, J. H.
Perkins, J. S.
Pesce-Rollins, M.
Piron, F.
Pivato, G.
Porter, T. A.
Raino, S.
Rando, R.
Razzano, M.
Reimer, A.
Reimer, O.
Reposeur, T.
Ritz, S.
Roth, M.
Rousseau, R.
Parkinson, P. M. Saz
Schulz, A.
Sgro, C.
Siskind, E. J.
Smith, D. A.
Spandre, G.
Spinelli, P.
Suson, D. J.
Takahashi, H.
Takeuchi, Y.
Thayer, J. G.
Thayer, J. B.
Thompson, D. J.
Tibaldo, L.
Tibolla, O.
Tinivella, M.
Torres, D. F.
Tosti, G.
Troja, E.
Uchiyama, Y.
Vandenbroucke, J.
Vasileiou, V.
Vianello, G.
Vitale, V.
Werner, M.
Winer, B. L.
Wood, K. S.
Yang, Z.
TI CONSTRAINTS ON THE GALACTIC POPULATION OF TeV PULSAR WIND NEBULAE USING
FERMI LARGE AREA TELESCOPE OBSERVATIONS
SO ASTROPHYSICAL JOURNAL
LA English
DT Article
DE gamma rays: general
ID GAMMA-RAY PULSARS; COMPOSITE SUPERNOVA REMNANT; YOUNG RADIO PULSAR;
ENERGETIC PSR J1357-6429; BLIND FREQUENCY SEARCHES; XMM-NEWTON
OBSERVATIONS; SOURCE HESS J1303-631; X-RAY; MAGNETIC-FIELD; CRAB-NEBULA
AB Pulsar wind nebulae (PWNe) have been established as the most populous class of TeV gamma-ray emitters. Since launch, the Fermi Large Area Telescope (LAT) has identified five high-energy (100 MeV < E < 100 GeV) gamma-ray sources as PWNe and detected a large number of PWN candidates, all powered by young and energetic pulsars. The wealth of multi-wavelength data available and the new results provided by Fermi-LAT give us an opportunity to find new PWNe and to explore the radiative processes taking place in known ones. The TeV gamma-ray unidentified (UNID) sources are the best candidates for finding new PWNe. Using 45 months of Fermi-LAT data for energies above 10 GeV, an analysis was performed near the position of 58 TeV PWNe and UNIDs within 5. of the Galactic plane to establish new constraints on PWN properties and find new clues on the nature of UNIDs. Of the 58 sources, 30 were detected, and this work provides their gamma-ray fluxes for energies above 10 GeV. The spectral energy distributions and upper limits, in the multi-wavelength context, also provide new information on the source nature and can help distinguish between emission scenarios, i.e., between classification as a pulsar candidate or as a PWN candidate. Six new GeV PWN candidates are described in detail and compared with existing models. A population study of GeV PWN candidates as a function of the pulsar/PWN system characteristics is presented.
C1 [Acero, F.; Brandt, T. J.; Ferrara, E. C.; Guiriec, S.; Harding, A. K.; Hays, E.; Hewitt, J.; McEnery, J. E.; Nemmen, R.; Perkins, J. S.; Thompson, D. J.; Troja, E.] NASA, Goddard Space Flight Ctr, Greenbelt, MD 20771 USA.
[Ackermann, M.; Mayer, M.; Schulz, A.] Deutsch Elektronen Synchrotron DESY, D-15738 Zeuthen, Germany.
[Ajello, M.] Univ Calif Berkeley, Space Sci Lab, Berkeley, CA 94720 USA.
[Allafort, A.; Bechtol, K.; Blandford, R. D.; Bloom, E. D.; Bottacini, E.; Buehler, R.; Cameron, R. A.; Charles, E.; Chiang, J.; Claus, R.; Di Venere, L.; do Couto e Silva, E.; Drell, P. S.; Drlica-Wagner, A.; Focke, W. B.; Franckowiak, A.; Funk, S.; Glanzman, T.; Godfrey, G.; Hayashida, M.; Hill, A. B.; Inoue, Y.; Jogler, T.; Johnson, A. S.; Kamae, T.; Kerr, M.; Lande, J.; Massaro, F.; Michelson, P. F.; Mitthumsiri, W.; Monzani, M. E.; Moskalenko, I. V.; Murgia, S.; Okumura, A.; Orlando, E.; Paneque, D.; Panetta, J. H.; Porter, T. A.; Reimer, A.; Reimer, O.; Thayer, J. G.; Thayer, J. B.; Uchiyama, Y.; Vandenbroucke, J.; Vianello, G.] Stanford Univ, Kavli Inst Particle Astrophys & Cosmol, WW Hansen Expt Phys Lab, Dept Phys, Stanford, CA 94305 USA.
[Allafort, A.; Bechtol, K.; Blandford, R. D.; Bloom, E. D.; Bottacini, E.; Buehler, R.; Cameron, R. A.; Charles, E.; Chiang, J.; Claus, R.; Di Venere, L.; do Couto e Silva, E.; Drell, P. S.; Drlica-Wagner, A.; Focke, W. B.; Franckowiak, A.; Funk, S.; Glanzman, T.; Godfrey, G.; Hayashida, M.; Hill, A. B.; Inoue, Y.; Jogler, T.; Johnson, A. S.; Kamae, T.; Kerr, M.; Lande, J.; Massaro, F.; Michelson, P. F.; Mitthumsiri, W.; Monzani, M. E.; Moskalenko, I. V.; Murgia, S.; Okumura, A.; Orlando, E.; Paneque, D.; Panetta, J. H.; Porter, T. A.; Reimer, A.; Reimer, O.; Thayer, J. G.; Thayer, J. B.; Uchiyama, Y.; Vandenbroucke, J.; Vianello, G.] Stanford Univ, SLAC Natl Accelerator Lab, Stanford, CA 94305 USA.
[Baldini, L.] Univ Pisa, I-56127 Pisa, Italy.
[Baldini, L.; Bellazzini, R.; Bregeon, J.; Kuss, M.; Pesce-Rollins, M.; Razzano, M.; Sgro, C.; Spandre, G.; Tinivella, M.] Ist Nazl Fis Nucl, Sez Pisa, I-56127 Pisa, Italy.
[Ballet, J.; Chaves, R. C. G.; Grenier, I. A.] Univ Paris Diderot, CNRS, Serv Astrophys, Lab AIM,CEA IRFU,CEA Saclay, F-91191 Gif Sur Yvette, France.
[Barbiellini, G.; Longo, F.] Ist Nazl Fis Nucl, Sez Trieste, I-34127 Trieste, Italy.
[Barbiellini, G.; Longo, F.] Univ Trieste, Dipartimento Fis, I-34127 Trieste, Italy.
[Bastieri, D.; Buson, S.; Rando, R.] Ist Nazl Fis Nucl, Sez Padova, I-35131 Padua, Italy.
[Bastieri, D.; Buson, S.; Chiaro, G.; Pivato, G.; Rando, R.] Univ Padua, Dipartimento Fis & Astron G Galilei, I-35131 Padua, Italy.
[Bonamente, E.; Cecchi, C.; Lubrano, P.; Tosti, G.] Ist Nazl Fis Nucl, Sez Perugia, I-06123 Perugia, Italy.
[Bonamente, E.; Cecchi, C.; Lubrano, P.; Tosti, G.] Univ Perugia, Dipartimento Fis, I-06123 Perugia, Italy.
[Brigida, M.; de Palma, F.; Favuzzi, C.; Fusco, P.; Giglietto, N.; Giordano, F.; Loparco, F.; Monte, C.; Raino, S.; Spinelli, P.] Univ Politecn Bari, Dipartimento Fis M Merlin, I-70126 Bari, Italy.
[Brigida, M.; de Palma, F.; Favuzzi, C.; Fusco, P.; Gargano, F.; Giglietto, N.; Giordano, F.; Loparco, F.; Mazziotta, M. N.; Monte, C.; Raino, S.; Spinelli, P.] Ist Nazl Fis Nucl, Sez Bari, I-70126 Bari, Italy.
[Bruel, P.; Fegan, S. J.; Horan, D.] Ecole Polytech, CNRS, IN2P3, Lab Leprince Ringuet, F-91128 Palaiseau, France.
[Caliandro, G. A.; Hadasch, D.; Torres, D. F.] Inst Ciencies Espai IEEE CSIC, E-08193 Barcelona, Spain.
[Caraveo, P. A.; Marelli, M.] INAF Ist Astrofis Spaziale & Fis Cosm, I-20133 Milan, Italy.
[Chekhtman, A.] George Mason Univ, Coll Sci, Ctr Earth Observing & Space Res, Fairfax, VA 22030 USA.
[Ciprini, S.; Cutini, S.; Gasparrini, D.] Agenzia Spaziale Italiana, Sci Data Ctr, I-00044 Frascati, Italy.
[Ciprini, S.; Cutini, S.; Gasparrini, D.] Osserv Astron Roma, Ist Nazl Astrofis, I-00040 Monte Porzio Catone, Italy.
[Cohen-Tanugi, J.; Falletti, L.; Nuss, E.; Piron, F.; Vasileiou, V.] Univ Montpellier 2, CNRS, IN2P3, Lab Univers & Particules Montpellier, F-34095 Montpellier, France.
[Conrad, J.; Larsson, S.; Yang, Z.] Stockholm Univ, Dept Phys, AlbaNova, SE-10691 Stockholm, Sweden.
[Conrad, J.; Jackson, M. S.; Larsson, S.; Yang, Z.] Stockholm Univ, Oskar Klein Ctr Cosmoparticle Phys, AlbaNova, SE-10691 Stockholm, Sweden.
[Conrad, J.] Royal Swedish Acad Sci, SE-10405 Stockholm, Sweden.
[Dalton, M.; Hou, X.; Lemoine-Goumard, M.; Mehault, J.; Reposeur, T.; Rousseau, R.; Smith, D. A.] Univ Bordeaux 1, CNRS, IN2p3, CEN Bordeaux Gradignan, F-33175 Gradignan, France.
[D'Ammando, F.; Giroletti, M.; Orienti, M.] INAF Ist Radioastron, I-40129 Bologna, Italy.
[Dermer, C. D.; Grove, J. E.; Lovellette, M. N.; Wood, K. S.] Naval Res Lab, Div Space Sci, Washington, DC 20375 USA.
[Fukazawa, Y.; Hanabata, Y.; Hayashi, K.; Kawano, T.; Takahashi, H.] Hiroshima Univ, Dept Phys Sci, Higashihiroshima, Hiroshima 7398526, Japan.
[Gregoire, T.; Grondin, M. -H.; Knoedlseder, J.] CNRS, IRAP, F-31028 Toulouse 4, France.
[Gregoire, T.; Grondin, M. -H.; Knoedlseder, J.] Univ Toulouse, GAHEC, UPS OMP, IRAP, F-31028 Toulouse, France.
[Hayashida, M.] Kyoto Univ, Grad Sch Sci, Dept Astron, Sakyo Ku, Kyoto 6068502, Japan.
[Hill, A. B.] Univ Southampton, Sch Phys & Astron, Southampton SO17 1BJ, Hants, England.
[Hughes, R. E.; Winer, B. L.] Ohio State Univ, Ctr Cosmol & Astroparticle Phys, Dept Phys, Columbus, OH 43210 USA.
[Jackson, M. S.] Royal Inst Technol KTH, Dept Phys, AlbaNova, SE-10691 Stockholm, Sweden.
[Johannesson, G.] Univ Iceland, Inst Sci, IS-107 Reykjavik, Iceland.
[Larsson, S.] Stockholm Univ, Dept Astron, SE-10691 Stockholm, Sweden.
[Latronico, L.] Ist Nazl Fis Nucl, Sez Torino, I-10125 Turin, Italy.
[McEnery, J. E.] Univ Maryland, Dept Phys, College Pk, MD 20742 USA.
[McEnery, J. E.] Univ Maryland, Dept Astron, College Pk, MD 20742 USA.
[Mizuno, T.; Ohsugi, T.] Hiroshima Univ, Hiroshima Astrophys Sci Ctr, Higashihiroshima, Hiroshima 7398526, Japan.
[Morselli, A.; Vitale, V.] Ist Nazl Fis Nucl, Sez Roma Tor Vergata, I-00133 Rome, Italy.
[Nakamori, T.; Takeuchi, Y.] Waseda Univ, Res Inst Sci & Engn, Shinjuku Ku, Tokyo 1698555, Japan.
[Okumura, A.] Nagoya Univ, Solar Terr Environm Lab, Nagoya, Aichi 4648601, Japan.
[Ormes, J. F.] Univ Denver, Dept Phys & Astron, Denver, CO 80208 USA.
[Paneque, D.] Max Planck Inst Phys & Astrophys, D-80805 Munich, Germany.
[Perkins, J. S.] Univ Maryland Baltimore Cty, Dept Phys, Baltimore, MD 21250 USA.
[Perkins, J. S.] Univ Maryland Baltimore Cty, Ctr Space Sci & Technol, Baltimore, MD 21250 USA.
[Perkins, J. S.] NASA, Goddard Space Flight Ctr, Ctr Res & Explorat Space Sci & Technol, Greenbelt, MD 20771 USA.
[Perkins, J. S.] Harvard Smithsonian Ctr Astrophys, Cambridge, MA 02138 USA.
[Razzano, M.; Ritz, S.; Parkinson, P. M. Saz] Univ Calif Santa Cruz, Santa Cruz Inst Particle Phys, Dept Phys, Santa Cruz, CA 95064 USA.
[Razzano, M.; Ritz, S.; Parkinson, P. M. Saz] Univ Calif Santa Cruz, Dept Astron & Astrophys, Santa Cruz, CA 95064 USA.
[Reimer, A.; Reimer, O.; Werner, M.] Leopold Franzens Univ Innsbruck, Inst Astro & Teilchenphys, A-6020 Innsbruck, Austria.
[Reimer, A.; Reimer, O.; Werner, M.] Leopold Franzens Univ Innsbruck, Inst Theoret Phys, A-6020 Innsbruck, Austria.
[Roth, M.] Univ Washington, Dept Phys, Seattle, WA 98195 USA.
[Siskind, E. J.] NYCB Real Time Comp Inc, Lattingtown, NY 11560 USA.
[Suson, D. J.] Purdue Univ Calumet, Dept Chem & Phys, Hammond, IN 46323 USA.
[Tibolla, O.] Univ Wurzburg, Inst Theoret Phys & Astrophys, D-97074 Wurzburg, Germany.
[Torres, D. F.] ICREA, E-08010 Barcelona, Spain.
[Vianello, G.] Consorzio Interuniv Fis Spaziale, I-10133 Turin, Italy.
[Vitale, V.] Univ Roma Tor Vergata, Dipartimento Fis, I-00133 Rome, Italy.
RP Acero, F (reprint author), NASA, Goddard Space Flight Ctr, Greenbelt, MD 20771 USA.
EM funk@slac.stanford.edu; joshualande@gmail.com; lemoine@cenbg.in2p3.fr;
rousseau@cenbg.in2p3.fr
RI Massaro, Francesco/L-9102-2016; Torres, Diego/O-9422-2016; Orlando,
E/R-5594-2016; Di Venere, Leonardo/C-7619-2017; Saz Parkinson, Pablo
Miguel/I-7980-2013; Moskalenko, Igor/A-1301-2007; Rando,
Riccardo/M-7179-2013; Hays, Elizabeth/D-3257-2012; Sgro,
Carmelo/K-3395-2016; Reimer, Olaf/A-3117-2013; Morselli,
Aldo/G-6769-2011; Nemmen, Rodrigo/O-6841-2014; Funk, Stefan/B-7629-2015;
Johannesson, Gudlaugur/O-8741-2015; Loparco, Francesco/O-8847-2015;
Gargano, Fabio/O-8934-2015; giglietto, nicola/I-8951-2012
OI orienti, monica/0000-0003-4470-7094; Giroletti,
Marcello/0000-0002-8657-8852; Mazziotta, Mario
Nicola/0000-0001-9325-4672; Gasparrini, Dario/0000-0002-5064-9495;
Baldini, Luca/0000-0002-9785-7726; Marelli, Martino/0000-0002-8017-0338;
Massaro, Francesco/0000-0002-1704-9850; Torres,
Diego/0000-0002-1522-9065; Di Venere, Leonardo/0000-0003-0703-824X;
Inoue, Yoshiyuki/0000-0002-7272-1136; Caraveo,
Patrizia/0000-0003-2478-8018; Sgro', Carmelo/0000-0001-5676-6214;
SPINELLI, Paolo/0000-0001-6688-8864; Rando,
Riccardo/0000-0001-6992-818X; Hill, Adam/0000-0003-3470-4834; Bastieri,
Denis/0000-0002-6954-8862; Pesce-Rollins, Melissa/0000-0003-1790-8018;
Moskalenko, Igor/0000-0001-6141-458X; Reimer, Olaf/0000-0001-6953-1385;
Morselli, Aldo/0000-0002-7704-9553; Funk, Stefan/0000-0002-2012-0080;
Johannesson, Gudlaugur/0000-0003-1458-7036; Loparco,
Francesco/0000-0002-1173-5673; Gargano, Fabio/0000-0002-5055-6395;
giglietto, nicola/0000-0002-9021-2888
FU K. A. Wallenberg Foundation; European Community [ERC-StG-259391]; Marie
Curie IOF [275861]
FX Royal Swedish Academy of Sciences Research Fellow, funded by a grant
from the K. A. Wallenberg Foundation.; Funded by contract ERC-StG-259391
from the European Community.; Funded by a Marie Curie IOF,
FP7/2007-2013, grant agreement No. 275861.
NR 159
TC 28
Z9 28
U1 0
U2 19
PU IOP PUBLISHING LTD
PI BRISTOL
PA TEMPLE CIRCUS, TEMPLE WAY, BRISTOL BS1 6BE, ENGLAND
SN 0004-637X
J9 ASTROPHYS J
JI Astrophys. J.
PD AUG 10
PY 2013
VL 773
IS 1
AR 77
DI 10.1088/0004-637X/773/1/77
PG 27
WC Astronomy & Astrophysics
SC Astronomy & Astrophysics
GA 193BN
UT WOS:000322531900077
ER
PT J
AU Aller, KM
Kraus, AL
Liu, MC
Burgett, WS
Chambers, KC
Hodapp, KW
Kaiser, N
Magnier, EA
Price, PA
AF Aller, Kimberly M.
Kraus, Adam L.
Liu, Michael C.
Burgett, William S.
Chambers, Kenneth C.
Hodapp, Klaus W.
Kaiser, Nick
Magnier, Eugene A.
Price, Paul A.
TI A PAN-STARRS plus UKIDSS SEARCH FOR YOUNG, WIDE PLANETARY-MASS
COMPANIONS IN UPPER SCORPIUS
SO ASTROPHYSICAL JOURNAL
LA English
DT Article
DE binaries: general; brown dwarfs; planetary systems; stars: pre-main
sequence
ID BROWN DWARF CANDIDATES; NEAR-INFRARED SPECTRA; SOLAR-TYPE STARS; SKY
SURVEY 2MASS; OB ASSOCIATION; HR 8799; GRAVITATIONAL-INSTABILITY;
SUBSTELLAR COMPANION; CIRCUMSTELLAR DISKS; EVOLUTIONARY MODELS
AB We have combined optical and NIR photometry from Pan-STARRS 1 and UKIDSS to search the young (5-10 Myr) star-forming region of Upper Scorpius for wide (approximate to 400-4000 AU) substellar companions down to similar to 5M(Jup). Our search is approximate to 4 mag deeper than previous work based on the Two Micron All Sky Survey. We identified several candidates around known stellar members using a combination of color selection and spectral energy distribution fitting. Our follow-up spectroscopy has identified two new companions as well as confirmed two companions previously identified from photometry, with spectral types of M7.5-M9 and masses of similar to 15-60 M-Jup, indicating a frequency for such wide substellar companions of similar to 0.6% +/- 0.3%. Both USco 1610-1913B and USco 1612-1800B are more luminous than expected for their spectral type compared with known members of Upper Sco. HIP 77900B has an extreme mass ratio (M-2/M-1 approximate to 0.005) and an extreme separation of 3200 AU. USco 1602-2401B also has a very large separation of 1000 AU. We have also confirmed a low-mass stellar companion, USco 1610-2502B (730 AU, M5.5). Our substellar companions appear both non-coeval with their primary stars according to evolutionary models and, as a group, are systematically more luminous than the Upper Sco cluster sequence. One possible reason for these luminosity discrepancies could be different formation processes or accretion histories for these objects.
C1 [Aller, Kimberly M.; Kraus, Adam L.; Liu, Michael C.; Burgett, William S.; Chambers, Kenneth C.; Hodapp, Klaus W.; Kaiser, Nick; Magnier, Eugene A.] Univ Hawaii, Inst Astron, Honolulu, HI 96822 USA.
[Kraus, Adam L.] Harvard Smithsonian Ctr Astrophys, Cambridge, MA 02138 USA.
[Price, Paul A.] Princeton Univ, Dept Astrophys Sci, Princeton, NJ 08544 USA.
RP Aller, KM (reprint author), Univ Hawaii, Inst Astron, 2680 Woodlawn Dr, Honolulu, HI 96822 USA.
NR 85
TC 19
Z9 19
U1 0
U2 4
PU IOP PUBLISHING LTD
PI BRISTOL
PA TEMPLE CIRCUS, TEMPLE WAY, BRISTOL BS1 6BE, ENGLAND
SN 0004-637X
J9 ASTROPHYS J
JI Astrophys. J.
PD AUG 10
PY 2013
VL 773
IS 1
AR 63
DI 10.1088/0004-637X/773/1/63
PG 15
WC Astronomy & Astrophysics
SC Astronomy & Astrophysics
GA 193BN
UT WOS:000322531900063
ER
PT J
AU Chen, CTJ
Hickox, RC
Alberts, S
Brodwin, M
Jones, C
Murray, SS
Alexander, D
Assef, RJ
Brown, MJI
Dey, A
Forman, WR
Gorjian, V
Goulding, AD
Le Floc'h, E
Jannuzi, BT
Mullaney, JR
Pope, A
AF Chen, Chien-Ting J.
Hickox, Ryan C.
Alberts, Stacey
Brodwin, Mark
Jones, Christine
Murray, Stephen S.
Alexander, DavidM.
Assef, Roberto J.
Brown, Michael J. I.
Dey, Arjun
Forman, William R.
Gorjian, Varoujan
Goulding, Andrew D.
Le Floc'h, Emeric
Jannuzi, Buell T.
Mullaney, James R.
Pope, Alexandra
TI A CORRELATION BETWEEN STAR FORMATION RATE AND AVERAGE BLACK HOLE
ACCRETION IN STAR-FORMING GALAXIES
SO ASTROPHYSICAL JOURNAL
LA English
DT Article
DE galaxies: active; galaxies: evolution; galaxies: starburst; infrared:
galaxies; X-rays: galaxies
ID ACTIVE GALACTIC NUCLEI; SPECTRAL ENERGY-DISTRIBUTIONS; FORMATION RATE
INDICATOR; QUASAR HOST GALAXIES; IRAC SHALLOW SURVEY; WIDE-FIELD SURVEY;
SIMILAR-TO 2.5; X-RAY SURVEY; FORMATION HISTORY; GOODS-HERSCHEL
AB We present a measurement of the average supermassive black hole accretion rate (BHAR) as a function of the star formation rate (SFR) for galaxies in the redshift range 0.25 < z < 0.8. We study a sample of 1767 far-IR-selected star-forming galaxies in the 9 deg(2) Bootes multi-wavelength survey field. The SFR is estimated using 250 mu m observations from the Herschel Space Observatory, for which the contribution from the active galactic nucleus (AGN) is minimal. In this sample, 121 AGNs are directly identified using X-ray or mid-IR selection criteria. We combined these detected AGNs and an X-ray stacking analysis for undetected sources to study the average BHAR for all of the star-forming galaxies in our sample. We find an almost linear relation between the average BHAR (in M-circle dot yr(-1)) and the SFR (in M-circle dot yr(-1)) for galaxies across a wide SFR range 0.85 < log SFR < 2.56 : logBHAR = (-3.72 +/- 0.52) + (1.05 +/- 0.33) log SFR. This global correlation between SFR and average BHAR is consistent with a simple picture in which SFR and AGN activity are tightly linked over galaxy evolution timescales.
C1 [Chen, Chien-Ting J.; Hickox, Ryan C.] Dartmouth Coll, Dept Phys & Astron, Wilder Lab 6127, Hanover, NH 03755 USA.
[Alberts, Stacey; Pope, Alexandra] Univ Massachusetts, Dept Astron, Amherst, MA 01003 USA.
[Brodwin, Mark] Univ Missouri, Dept Phys & Astron, Kansas City, MO 64110 USA.
[Jones, Christine; Forman, William R.; Goulding, Andrew D.] Harvard Smithsonian Ctr Astrophys, Cambridge, MA 02138 USA.
[Murray, Stephen S.] Johns Hopkins Univ, Dept Phys & Astron, Baltimore, MD 21218 USA.
[Alexander, DavidM.; Mullaney, James R.] Univ Durham, Dept Phys, Durham DH1 3LE, England.
[Assef, Roberto J.; Gorjian, Varoujan] CALTECH, Jet Prop Lab, Pasadena, CA 91109 USA.
[Brown, Michael J. I.] Monash Univ, Sch Phys, Clayton, Vic 3800, Australia.
[Dey, Arjun; Jannuzi, Buell T.] Natl Opt Astron Observ, Tucson, AZ 85726 USA.
[Le Floc'h, Emeric; Mullaney, James R.] Univ Paris Diderot, Lab AIM Paris Saclay, CEA, DSM,Irfu,CNRS,CE Saclay, F-91191 Gif Sur Yvette, France.
RP Chen, CTJ (reprint author), Dartmouth Coll, Dept Phys & Astron, Wilder Lab 6127, Hanover, NH 03755 USA.
EM ctchen@dartmouth.edu
RI Brown, Michael/B-1181-2015;
OI Brown, Michael/0000-0002-1207-9137; Chen,
Chien-Ting/0000-0002-4945-5079; Alexander, David/0000-0002-5896-6313;
Forman, William/0000-0002-9478-1682
FU Dartmouth Fellowship; Chandra grant [SP8-9001X, AR8-9017X]
FX We are grateful to the anonymous referee for the very careful reading of
the paper, and the suggestions that significantly improved this paper.
We thank our colleagues on the AGES, IRAC Shallow Survey, SDWFS, NDWFS,
and the XBootes teams, and the HerMES team for making the data publicly
available. The first Spitzer MIPS survey of the Bootes region was
obtained using GTO time provided by the Spitzer Infrared Spectrograph
Team (PI: James Houck) and by M. Rieke. We thank the collaborators in
that work for access to the 24 mu m catalog generated from those data by
Emeric Le Floc'h. We also thank Chris S. Kochanek for useful
discussions. C.-T.J.C was supported by a Dartmouth Fellowship. This work
was supported in part by Chandra grants SP8-9001X and AR8-9017X.
NR 92
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PU IOP PUBLISHING LTD
PI BRISTOL
PA TEMPLE CIRCUS, TEMPLE WAY, BRISTOL BS1 6BE, ENGLAND
SN 0004-637X
J9 ASTROPHYS J
JI Astrophys. J.
PD AUG 10
PY 2013
VL 773
IS 1
AR 3
DI 10.1088/0004-637X/773/1/3
PG 9
WC Astronomy & Astrophysics
SC Astronomy & Astrophysics
GA 193BN
UT WOS:000322531900003
ER
PT J
AU Johannsen, T
Psaltis, D
AF Johannsen, Tim
Psaltis, Dimitrios
TI TESTING THE NO-HAIR THEOREM WITH OBSERVATIONS IN THE ELECTROMAGNETIC
SPECTRUM. IV. RELATIVISTICALLY BROADENED IRON LINES
SO ASTROPHYSICAL JOURNAL
LA English
DT Article
DE accretion, accretion disks; black hole physics; galaxies: active;
gravitation; line: profiles; relativistic processes
ID ARBITRARY MULTIPOLE MOMENTS; SAGITTARIUS A-ASTERISK; BLACK-HOLE
CANDIDATES; STRONG-GRAVITY REGIME; X-RAY BINARIES; GRAVITATIONAL-WAVES;
GENERAL-RELATIVITY; ACCRETION DISKS; EMISSION-LINES; KERR SPACETIME
AB According to the no-hair theorem, astrophysical black holes are fully characterized by their masses and spins and are described by the Kerr metric. This theorem can be tested observationally by measuring (at least) three different multipole moments of the spacetimes of black holes. In this paper, we calculate the profiles of fluorescent iron lines emitted from the accretion flows around black hole candidates within a framework that allows us to perform the calculation as a function of its mass and spin as well as of a free parameter that measures potential deviations from the Kerr metric. We show that such deviations lead to line profiles that are significantly altered and may exhibit a modified flux ratio of the two peaks in their characteristic double-peaked shape. We also show that the disk inclination can be measured independently of the spin and the deviation parameter at low to intermediate inclination angles, as in the case of Kerr black holes. We estimate the precision that near-future X-ray missions such as Astro-H and ATHENA+ are required to achieve in order to resolve deviations from the Kerr metric in iron line profiles and show that constraints on such deviations will be strongest for rapidly spinning black holes. More generally, we show that measuring the line profile with a precision of similar to 5% at disk inclinations of 30 degrees or 60 degrees constrains the deviation parameter to order unity for values of the spin a greater than or similar to 0.5M.
C1 [Johannsen, Tim] Univ Waterloo, Dept Phys & Astron, Waterloo, ON N2L 3G1, Canada.
[Johannsen, Tim] Univ Toronto, Canadian Inst Theoret Astrophys, Toronto, ON M5S 3H8, Canada.
[Johannsen, Tim] Perimeter Inst Theoret Phys, Waterloo, ON N2L 2Y5, Canada.
[Johannsen, Tim; Psaltis, Dimitrios] Univ Arizona, Dept Phys, Tucson, AZ 85721 USA.
[Johannsen, Tim; Psaltis, Dimitrios] Univ Arizona, Dept Astron, Tucson, AZ 85721 USA.
[Psaltis, Dimitrios] Harvard Smithsonian Ctr Astrophys, Cambridge, MA 02138 USA.
FU University of Arizona by the NSF [NSF 0746549]; CITA National Fellowship
at the University of Waterloo; Government of Canada through Industry
Canada; Province of Ontario through the Ministry of Research and
Innovation
FX We thank the referee, C. Reynolds, as well as L. Brenneman for useful
comments. This work was supported at the University of Arizona by the
NSF CAREER award NSF 0746549. T. J. was also supported by a CITA
National Fellowship at the University of Waterloo. Research at Perimeter
Institute is supported by the Government of Canada through Industry
Canada and by the Province of Ontario through the Ministry of Research
and Innovation.
NR 72
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PU IOP PUBLISHING LTD
PI BRISTOL
PA TEMPLE CIRCUS, TEMPLE WAY, BRISTOL BS1 6BE, ENGLAND
SN 0004-637X
J9 ASTROPHYS J
JI Astrophys. J.
PD AUG 10
PY 2013
VL 773
IS 1
AR 57
DI 10.1088/0004-637X/773/1/57
PG 9
WC Astronomy & Astrophysics
SC Astronomy & Astrophysics
GA 193BN
UT WOS:000322531900057
ER
PT J
AU Melott, AL
Bambach, RK
AF Melott, Adrian L.
Bambach, Richard K.
TI DO PERIODICITIES IN EXTINCTION-WITH POSSIBLE ASTRONOMICAL
CONNECTIONS-SURVIVE A REVISION OF THE GEOLOGICAL TIMESCALE?
SO ASTROPHYSICAL JOURNAL
LA English
DT Article
DE astrobiology; dust, extinctions; methods: statistical
ID UNEVENLY SPACED DATA; TIME-SERIES ANALYSIS; MASS EXTINCTIONS; GENERAL
TRENDS; FOSSIL RECORD; BIODIVERSITY; CYCLES; FLUCTUATION; ORIGINATION;
DIVERSITY
AB A major revision of the geological timescale was published in 2012. We re-examine our past finding of a 27 Myr periodicity in marine extinction rates by re-assigning dates to the extinction data used previously. We find that the spectral power in this period is somewhat increased, and persists at a narrow bandwidth, which supports our previous contention that the Nemesis hypothesis is untenable as an explanation for the periodicity that was first noted by Raup & Sepkoski in the 1980s. We enumerate a number of problems in a recent study comparing extinction rates with time series models.
C1 [Melott, Adrian L.] Univ Kansas, Dept Phys & Astron, Lawrence, KS 66045 USA.
[Bambach, Richard K.] Smithsonian Inst, Natl Museum Nat Hist, Dept Paleobiol, Washington, DC 20013 USA.
RP Melott, AL (reprint author), Univ Kansas, Dept Phys & Astron, Lawrence, KS 66045 USA.
NR 30
TC 10
Z9 10
U1 0
U2 12
PU IOP PUBLISHING LTD
PI BRISTOL
PA TEMPLE CIRCUS, TEMPLE WAY, BRISTOL BS1 6BE, ENGLAND
SN 0004-637X
EI 1538-4357
J9 ASTROPHYS J
JI Astrophys. J.
PD AUG 10
PY 2013
VL 773
IS 1
AR 6
DI 10.1088/0004-637X/773/1/6
PG 5
WC Astronomy & Astrophysics
SC Astronomy & Astrophysics
GA 193BN
UT WOS:000322531900006
ER
PT J
AU Minh, YC
Liu, HB
Ho, PTP
Hsieh, PY
Su, YN
Kim, SS
Wright, M
AF Minh, Young Chol
Liu, Hauyu Baobab
Ho, Paul T. P.
Hsieh, Pei-Ying
Su, Yu-Nung
Kim, Sungsoo S.
Wright, Melvyn
TI GREEN BANK TELESCOPE OBSERVATIONS OF THE NH3 (3,3) AND (6,6) TRANSITIONS
TOWARD SAGITTARIUS A MOLECULAR CLOUDS
SO ASTROPHYSICAL JOURNAL
LA English
DT Article
DE Galaxy: center; ISM: individual objects (Sgr A); ISM: molecules; radio
lines: ISM
ID GALACTIC-CENTER REGION; APERTURE SYNTHESIS OBSERVATIONS; A COMPLEX;
CIRCUMNUCLEAR DISK; SGR-A; GAS; PARSECS; ENVIRONMENT; AMMONIA;
MORPHOLOGY
AB Ammonia (3, 3) and (6, 6) transitions have been observed using the Green Bank Telescope toward the Sgr A region. The gas is mainly concentrated in 50 km s(-1) and 20 km s(-1) clouds located in a plane inclined to the galactic plane. These "main" clouds appear to be virialized and influenced by the expansion of the supernova remnant Sgr A East. The observed emission shows very complicated features in the morphology and velocity structure. Gaussian multi-component fittings of the observed spectra revealed that various "streaming" gas components exist all over the observed region. These components include those previously known as "streamers" and "ridges," but most of these components appear not to be directly connected to the major gas condensations (the 50 km s(-1) and 20 km s(-1) clouds). They are apparently located out of the galactic plane, and they may have a different origin than the major gas condensations. Some of the streaming components are expected to be sources that feed the circumnuclear disk of our Galactic center directly and episodically. They may also evolve differently than major gas condensations under the influence of the activities of the Galactic center.
C1 [Minh, Young Chol] Korea Astron & Space Sci Inst, Taejon 305348, South Korea.
[Liu, Hauyu Baobab; Ho, Paul T. P.; Hsieh, Pei-Ying; Su, Yu-Nung] Acad Sinica, Inst Astron & Astrophys, Taipei 10617, Taiwan.
[Ho, Paul T. P.] Harvard Smithsonian Ctr Astrophys, Cambridge, MA 02138 USA.
[Kim, Sungsoo S.] Kyung Hee Univ, Dept Astron & Space Sci, Yongin 446701, Kyungki Do, South Korea.
[Wright, Melvyn] Univ Calif Berkeley, Radio Astron Lab, Berkeley, CA 94720 USA.
RP Minh, YC (reprint author), Korea Astron & Space Sci Inst, Daeduk Daero 776, Taejon 305348, South Korea.
RI Kim, Sungsoo/A-8601-2011
OI Kim, Sungsoo/0000-0002-5570-2160
FU Mid-career Research Program through the National Research Foundation
(NRF) [2011-0016898]; Ministry of Education, Science, and Technology
(MEST) of Korea
FX We thank the GBT staff for their capable assistance in making these
observations. S.S.K.'s work was supported by the Mid-career Research
Program (No. 2011-0016898) through the National Research Foundation
(NRF) grant funded by the Ministry of Education, Science, and Technology
(MEST) of Korea.
NR 37
TC 3
Z9 3
U1 0
U2 3
PU IOP PUBLISHING LTD
PI BRISTOL
PA TEMPLE CIRCUS, TEMPLE WAY, BRISTOL BS1 6BE, ENGLAND
SN 0004-637X
J9 ASTROPHYS J
JI Astrophys. J.
PD AUG 10
PY 2013
VL 773
IS 1
AR 31
DI 10.1088/0004-637X/773/1/31
PG 10
WC Astronomy & Astrophysics
SC Astronomy & Astrophysics
GA 193BN
UT WOS:000322531900031
ER
PT J
AU Pepper, J
Siverd, RJ
Beatty, TG
Gaudi, BS
Stassun, KG
Eastman, J
Collins, K
Latham, DW
Bieryla, A
Buchhave, LA
Jensen, ELN
Manner, M
Penev, K
Crepp, JR
Cargile, PA
Dhital, S
Calkins, ML
Esquerdo, GA
Berlind, P
Fulton, BJ
Street, R
Ma, B
Ge, J
Wang, J
Mao, QQ
Richert, AJW
Gould, A
Depoy, DL
Kielkopf, JF
Marshall, JL
Pogge, RW
Stefanik, RP
Trueblood, M
Trueblood, P
AF Pepper, Joshua
Siverd, Robert J.
Beatty, Thomas G.
Gaudi, B. Scott
Stassun, Keivan G.
Eastman, Jason
Collins, Karen
Latham, David W.
Bieryla, Allyson
Buchhave, Lars A.
Jensen, Eric L. N.
Manner, Mark
Penev, Kaloyan
Crepp, Justin R.
Cargile, Phillip A.
Dhital, Saurav
Calkins, Michael L.
Esquerdo, Gilbert A.
Berlind, Perry
Fulton, Benjamin J.
Street, Rachel
Ma, Bo
Ge, Jian
Wang, Ji
Mao, Qingqing
Richert, Alexander J. W.
Gould, Andrew
Depoy, Darren L.
Kielkopf, John F.
Marshall, Jennifer L.
Pogge, Richard W.
Stefanik, Robert P.
Trueblood, Mark
Trueblood, Patricia
TI KELT-3b: A HOT JUPITER TRANSITING A V=9.8 LATE-F STAR
SO ASTROPHYSICAL JOURNAL
LA English
DT Article
DE planetary systems; planets and satellites: detection
ID IMAGE SUBTRACTION; SUPER-EARTH; GIANT STARS; SKY SURVEY; K-DWARF;
STELLAR; PLANET; EXOPLANETS; EVOLUTION; MISSION
AB We report the discovery of KELT-3b, a moderately inflated transiting hot Jupiter with a mass of 1.477(-0.067)(+0.066) M-J, radius of 1.345 +/- 0.072 R-J, and an orbital period of 2.7033904 +/- 0.000010 days. The host star, KELT-3, is a V = 9.8 late F star with M-* = 1.278(-0.061)(+0.063) M-circle dot, R-* = 1.472(-0.067)(+0.065) R-circle dot, T-eff = 6306(-49)(+50) K, log(g) = 4.209(-0.031)(+0.033), and [Fe/H] = 0.044(-0.082)(+0.080), and has a likely proper motion companion. KELT-3b is the third transiting exoplanet discovered by the KELT survey, and is orbiting one of the 20 brightest known transiting planet host stars, making it a promising candidate for detailed characterization studies. Although we infer that KELT-3 is significantly evolved, a preliminary analysis of the stellar and orbital evolution of the system suggests that the planet has likely always received a level of incident flux above the empirically identified threshold for radius inflation suggested by Demory & Seager.
C1 [Pepper, Joshua] Lehigh Univ, Dept Phys, Bethlehem, PA 18015 USA.
[Pepper, Joshua; Siverd, Robert J.; Stassun, Keivan G.; Cargile, Phillip A.; Dhital, Saurav; Mao, Qingqing] Vanderbilt Univ, Dept Phys & Astron, Nashville, TN 37235 USA.
[Beatty, Thomas G.; Gaudi, B. Scott; Gould, Andrew; Pogge, Richard W.] Ohio State Univ, Dept Astron, Columbus, OH 43210 USA.
[Stassun, Keivan G.] Fisk Univ, Dept Phys, Nashville, TN 37208 USA.
[Eastman, Jason; Fulton, Benjamin J.; Street, Rachel] Las Cumbres Observ Global Telescope Network, Santa Barbara, CA 93117 USA.
[Eastman, Jason] Univ Calif Santa Barbara, Dept Phys, Santa Barbara, CA 93106 USA.
[Collins, Karen; Kielkopf, John F.] Univ Louisville, Dept Phys & Astron, Louisville, KY 40292 USA.
[Latham, David W.; Bieryla, Allyson; Calkins, Michael L.; Esquerdo, Gilbert A.; Berlind, Perry; Stefanik, Robert P.] Harvard Smithsonian Ctr Astrophys, Cambridge, MA 02138 USA.
[Buchhave, Lars A.] Univ Copenhagen, Niels Bohr Inst, DK-21S00 Copenhagen, Denmark.
[Buchhave, Lars A.] Univ Copenhagen, Nat Hist Museum Denmark, Ctr Star & Planet Format, DK-1350 Copenhagen, Denmark.
[Jensen, Eric L. N.] Swarthmore Coll, Dept Phys & Astron, Swarthmore, PA 19081 USA.
[Manner, Mark] Spot Observ, Nunnelly, TN 37137 USA.
[Penev, Kaloyan] Princeton Univ, Dept Astrophys Sci, Princeton, NJ 08544 USA.
[Crepp, Justin R.] Univ Notre Dame, Dept Phys, Notre Dame, IN 46556 USA.
[Dhital, Saurav] Boston Univ, Dept Astron, Boston, MA 02215 USA.
[Fulton, Benjamin J.] Univ Hawaii, Inst Astron, Honolulu, HI 96822 USA.
[Ma, Bo; Ge, Jian] Univ Florida, Dept Astron, Gainesville, FL 32611 USA.
[Wang, Ji] Yale Univ, Dept Astron, New Haven, CT 06511 USA.
[Richert, Alexander J. W.] Penn State Univ, Dept Astron & Astrophys, University Pk, PA 16802 USA.
[Gould, Andrew; Pogge, Richard W.] Ohio State Univ, Ctr Cosmol & Astroparticle Phys, Columbus, OH 43210 USA.
[Depoy, Darren L.; Marshall, Jennifer L.] Texas A&M Univ, Dept Phys & Astron, College Stn, TX 77843 USA.
[Trueblood, Mark; Trueblood, Patricia] Winer Observ, Sonoita, AZ 85637 USA.
RP Pepper, J (reprint author), Lehigh Univ, Dept Phys, Bldg 16, Bethlehem, PA 18015 USA.
RI Mao, Qingqing/E-2043-2016;
OI Richert, Alexander/0000-0002-9613-6863; Penev,
Kaloyan/0000-0003-4464-1371; Jensen, Eric/0000-0002-4625-7333; Buchhave,
Lars A./0000-0003-1605-5666; Pepper, Joshua/0000-0002-3827-8417; Mao,
Qingqing/0000-0001-6001-6723; Eastman, Jason/0000-0003-3773-5142
FU NASA [NNG04GO70G, NNX07AP14G]; Vanderbilt Office of the Provost through
the Vanderbilt Initiative in Data-intensive Astrophysics; National
Science Foundation's PREST program [AST-0721386]; National Science
Foundation through PAARE Grant [AST-0849736]; National Science
Foundation through AAG Grant [AST-1009810]; NASA Kentucky Space Grant
Consortium Graduate Fellowship; NSF CAREER Grant [AST-1056524]; Kepler
Mission [NNX11AB99A]; NSF [NSF AST-0705139]; UCF-UF SRI program;
University of Florida
FX We would like to thank additional collaborators on the KELT project,
including Bruce Gary, Joao Gregorio, Roberto Zambelli, and KimMcLeod. We
would also like to thank Leslie Hebb, Robert Emrich, and Martin Paegert
for helpful discussions. Early work on KELT-North was supported by NASA
Grant NNG04GO70G. J. A. P. and K. G. S. acknowledge support from the
Vanderbilt Office of the Provost through the Vanderbilt Initiative in
Data-intensive Astrophysics. E.L.N.J. gratefully acknowledges the
support of the National Science Foundation's PREST program, which helped
to establish the Peter van de Kamp Observatory through grant
AST-0721386. K. G. S. acknowledges the support of the National Science
Foundation through PAARE Grant AST-0849736 and AAG Grant AST-1009810. K.
A. C. was supported by a NASA Kentucky Space Grant Consortium Graduate
Fellowship. Work by B. S. G., J. D. E., and T. G. B. was partially
supported by NSF CAREER Grant AST-1056524. The TRES and KeplerCam
observations were obtained with partial support from the Kepler Mission
through NASA Cooperative Agreement NNX11AB99A with the Smithsonian
Astrophysical Observatory (PI: D. W. L.). The Byrne Observatory at
Sedgwick (BOS) is operated by the Las Cumbres Observatory Global
Telescope Network and is located at the Sedgwick Reserve, a part of the
University of California Natural Reserve System. EXPERT construction and
follow-up observations were funded by NSF with grant NSF AST-0705139,
NASA with grants NNX07AP14G (Origins), UCF-UF SRI program, and the
University of Florida. This work has made use of NASA's Astrophysics
Data System, the Exo-planet Orbit Database at exoplanets. org, the
Extrasolar Planet Encyclopedia at exoplanet. eu (Schneider et al. 2011),
and the SIMBAD database operated at CDS, Strasbourg, France.
NR 54
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PI BRISTOL
PA TEMPLE CIRCUS, TEMPLE WAY, BRISTOL BS1 6BE, ENGLAND
SN 0004-637X
J9 ASTROPHYS J
JI Astrophys. J.
PD AUG 10
PY 2013
VL 773
IS 1
AR 64
DI 10.1088/0004-637X/773/1/64
PG 11
WC Astronomy & Astrophysics
SC Astronomy & Astrophysics
GA 193BN
UT WOS:000322531900064
ER
PT J
AU Plotkin, RM
Gallo, E
Jonker, PG
AF Plotkin, Richard. M.
Gallo, Elena
Jonker, Peter G.
TI THE X-RAY SPECTRAL EVOLUTION OF GALACTIC BLACK HOLE X-RAY BINARIES
TOWARD QUIESCENCE
SO ASTROPHYSICAL JOURNAL
LA English
DT Article
DE accretion, accretion disks; black hole physics; X-rays: binaries
ID ADVECTION-DOMINATED ACCRETION; CANDIDATE XTE J1752-223; XMM-NEWTON
OBSERVATIONS; BROAD-BAND SPECTRUM; NOVA-MUSCAE 1991; LOW-HARD STATE; GX
339-4; LOW/HARD STATE; RADIO-EMISSION; MULTIWAVELENGTH OBSERVATIONS
AB Most transient black hole X-ray binaries (BHXBs) spend the bulk of their time in a quiescent state, where they accrete matter from their companion star at highly sub-Eddington luminosities (we define quiescence here as a normalized Eddington ratio l(x) = L0.5-10 keV/L-Edd < 10(-5)). Here, we present Chandra X-ray imaging spectroscopy for three BHXB systems (H 1743-322, MAXI J1659-152, and XTE J1752-223) as they fade into quiescence following an outburst. Multiple X-ray observations were taken within one month of each other, allowing us to track each individual system's X-ray spectral evolution during its decay. We compare these three systems to other BHXB systems. We confirm that quiescent BHXBs have softer X-ray spectra than low-hard-state BHXBs, and that quiescent BHXB spectral properties show no dependence on the binary system's orbital parameters. However, the observed anti-correlation between X-ray photon index (Gamma) and l(x) in the low-hard state does not continue once a BHXB enters quiescence. Instead, Gamma plateaus to an average = 2.08 +/- 0.07 by the time l(x) reaches similar to 10(-5). l(x) similar to 10(-5) is thus an observationally motivated upper limit for the beginning of the quiescent spectral state. Our results are discussed in the context of different accretion flow models and across the black hole mass scale.
C1 [Plotkin, Richard. M.; Gallo, Elena] Univ Michigan, Dept Astron, Ann Arbor, MI 48109 USA.
[Jonker, Peter G.] SRON, Netherlands Inst Space Res, NL-3584 CA Utrecht, Netherlands.
[Jonker, Peter G.] Harvard Smithsonian Ctr Astrophys, Cambridge, MA 02138 USA.
[Jonker, Peter G.] Radboud Univ Nijmegen, Dept Astrophys IMAPP, NL-6500 GL Nijmegen, Netherlands.
RP Plotkin, RM (reprint author), Univ Michigan, Dept Astron, 500 Church St, Ann Arbor, MI 48109 USA.
EM rplotkin@umich.edu
OI Plotkin, Richard/0000-0002-7092-0326
FU National Aeronautics and Space Administration through Chandra X-Ray
Observatory Center [GO1-12049A]; National Aeronautics Space
Administration [NAS8-03060]; Netherlands Organisation for Scientific
Research
FX We thank the anonymous referee for helpful comments that improved this
manuscript. We also thank Stephane Corbel for discussions regarding GX
339-4. Support for this work was provided by the National Aeronautics
and Space Administration through Chandra Award Nos. GO1-12049A and
GO1-12049A issued by the Chandra X-Ray Observatory Center, which is
operated by the Smithsonian Astrophysical Observatory for and on behalf
of the National Aeronautics Space Administration under contract
NAS8-03060. P. G. J. acknowledges support from the Netherlands
Organisation for Scientific Research. This research has made use of data
obtained from the Chandra Data Archive and the Chandra Source Catalog,
and software provided by the Chandra X-Ray Center (CXC) in the
application packages CIAO, ChIPS, and Sherpa.
NR 169
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PI BRISTOL
PA TEMPLE CIRCUS, TEMPLE WAY, BRISTOL BS1 6BE, ENGLAND
SN 0004-637X
EI 1538-4357
J9 ASTROPHYS J
JI Astrophys. J.
PD AUG 10
PY 2013
VL 773
IS 1
AR 59
DI 10.1088/0004-637X/773/1/59
PG 16
WC Astronomy & Astrophysics
SC Astronomy & Astrophysics
GA 193BN
UT WOS:000322531900059
ER
PT J
AU Poppenhaeger, K
Schmitt, JHMM
Wolk, SJ
AF Poppenhaeger, K.
Schmitt, J. H. M. M.
Wolk, S. J.
TI TRANSIT OBSERVATIONS OF THE HOT JUPITER HD 189733b AT X-RAY WAVELENGTHS
SO ASTROPHYSICAL JOURNAL
LA English
DT Article
DE binaries: general; planetary systems; stars: activity; stars: coronae;
stars: individual (HD 189733); X-rays: stars
ID HUBBLE-SPACE-TELESCOPE; EXTRASOLAR GIANT PLANETS; ATMOSPHERIC ESCAPE;
MASS-LOSS; CHROMOSPHERIC ACTIVITY; TRANSMISSION SPECTRUM; ROTATION
PERIOD; YOUNG STARS; HD-189733; SYSTEM
AB We present new X-ray observations obtained with Chandra ACIS-S of the HD 189733 system, consisting of a K-type star orbited by a transiting Hot Jupiter and an M-type stellar companion. We report a detection of the planetary transit in soft X-rays with a significantly deeper transit depth than observed in the optical. The X-ray data favor a transit depth of 6%-8%, versus a broadband optical transit depth of 2.41%. While we are able to exclude several possible stellar origins for this deep transit, additional observations will be necessary to fully exclude the possibility that coronal inhomogeneities influence the result. From the available data, we interpret the deep X-ray transit to be caused by a thin outer planetary atmosphere which is transparent at optical wavelengths, but dense enough to be opaque to X-rays. The X-ray radius appears to be larger than the radius observed at far-UV wavelengths, most likely due to high temperatures in the outer atmosphere at which hydrogen is mostly ionized. We furthermore detect the stellar companion HD 189733B in X-rays for the first time with an X-ray luminosity of log L-X = 26.67 erg s(-1). We show that the magnetic activity level of the companion is at odds with the activity level observed for the planet-hosting primary. The discrepancy may be caused by tidal interaction between the Hot Jupiter and its host star.
C1 [Poppenhaeger, K.; Wolk, S. J.] Harvard Smithsonian Ctr Astrophys, Cambridge, MA 02138 USA.
[Poppenhaeger, K.; Schmitt, J. H. M. M.] Hamburger Sternwarte, D-21029 Hamburg, Germany.
RP Poppenhaeger, K (reprint author), Harvard Smithsonian Ctr Astrophys, 60 Garden St, Cambridge, MA 02138 USA.
EM kpoppenhaeger@cfa.harvard.edu
OI Poppenhaeger, Katja/0000-0003-1231-2194
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PA TEMPLE CIRCUS, TEMPLE WAY, BRISTOL BS1 6BE, ENGLAND
SN 0004-637X
EI 1538-4357
J9 ASTROPHYS J
JI Astrophys. J.
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SC Astronomy & Astrophysics
GA 193BN
UT WOS:000322531900062
ER
PT J
AU Ross, NP
McGreer, ID
White, M
Richards, GT
Myers, AD
Palanque-Delabrouille, N
Strauss, MA
Anderson, SF
Shen, Y
Brandt, WN
Yeche, C
Swanson, MEC
Aubourg, E
Bailey, S
Bizyaev, D
Bovy, J
Brewington, H
Brinkmann, J
DeGraf, C
Di Matteo, T
Ebelke, G
Fan, XH
Ge, J
Malanushenko, E
Malanushenko, V
Mandelbaum, R
Maraston, C
Muna, D
Oravetz, D
Pan, K
Paris, I
Petitjean, P
Schawinski, K
Schlegel, DJ
Schneider, DP
Silverman, JD
Simmons, A
Snedden, S
Streblyanska, A
Suzuki, N
Weinberg, DH
York, D
AF Ross, Nicholas P.
McGreer, Ian D.
White, Martin
Richards, Gordon T.
Myers, Adam D.
Palanque-Delabrouille, Nathalie
Strauss, Michael A.
Anderson, Scott F.
Shen, Yue
Brandt, W. N.
Yeche, Christophe
Swanson, Molly E. C.
Aubourg, Eric
Bailey, Stephen
Bizyaev, Dmitry
Bovy, Jo
Brewington, Howard
Brinkmann, J.
DeGraf, Colin
Di Matteo, Tiziana
Ebelke, Garrett
Fan, Xiaohui
Ge, Jian
Malanushenko, Elena
Malanushenko, Viktor
Mandelbaum, Rachel
Maraston, Claudia
Muna, Demitri
Oravetz, Daniel
Pan, Kaike
Paris, Isabelle
Petitjean, Patrick
Schawinski, Kevin
Schlegel, David J.
Schneider, Donald P.
Silverman, John D.
Simmons, Audrey
Snedden, Stephanie
Streblyanska, Alina
Suzuki, Nao
Weinberg, David H.
York, Donald
TI THE SDSS-III BARYON OSCILLATION SPECTROSCOPIC SURVEY: THE QUASAR
LUMINOSITY FUNCTION FROM DATA RELEASE NINE
SO ASTROPHYSICAL JOURNAL
LA English
DT Article
DE cosmology: observations; galaxies: active; galaxies: luminosity
function, mass function; quasars: general; surveys
ID DIGITAL-SKY-SURVEY; ACTIVE GALACTIC NUCLEI; SUPERMASSIVE BLACK-HOLES;
HIGH-REDSHIFT QUASARS; DEEP FIELD-SOUTH; SIMILAR-TO 4; SPECTRAL
ENERGY-DISTRIBUTIONS; SURVEY PHOTOMETRIC SYSTEM; BROAD-LINE QUASARS;
DARK-MATTER HALOES
AB We present a new measurement of the optical quasar luminosity function (QLF), using data from the Sloan Digital Sky Survey-III: Baryon Oscillation Spectroscopic Survey (SDSS-III: BOSS). From the SDSS-III Data Release Nine, a uniform sample of 22,301 i less than or similar to 21.8 quasars are selected over an area of 2236 deg(2), with confirmed spectroscopic redshifts between 2.2 < z < 3.5, filling in a key part of the luminosity-redshift plane for optical quasar studies. The completeness of the survey is derived through simulated quasar photometry, and this completeness estimate is checked using a sample of quasars selected by their photometric variability within the BOSS footprint. We investigate the level of systematics associated with our quasar sample using the simulations, in the process generating color-redshift relations and a new quasar K-correction. We probe the faint end of the QLF to M-i (z = 2.2) approximate to -24.5 and see a clear break in the QLF at all redshifts up to z = 3.5. A log-linear relation (in log Phi* - M*) for a luminosity evolution and density evolution model is found to adequately describe our data within the range 2.2 < z < 3.5; across this interval the break luminosity increases by a factor of similar to 2.6 while Phi* declines by a factor of similar to 8. At z less than or similar to 2.2 our data are reasonably well fit by a pure luminosity evolution model, and only a weak signature of "AGN downsizing" is seen, in line with recent studies of the hard X-ray luminosity function. We compare our measured QLF to a number of theoretical models and find that models making a variety of assumptions about quasar triggering and halo occupation can fit our data over a wide range of redshifts and luminosities.
C1 [Ross, Nicholas P.; White, Martin; Bailey, Stephen; Schlegel, David J.; Suzuki, Nao] Lawrence Berkeley Natl Lab, Berkeley, CA 92420 USA.
[McGreer, Ian D.; Fan, Xiaohui] Steward Observ, Tucson, AZ 85721 USA.
[White, Martin] Univ Calif Berkeley, Dept Phys, Berkeley, CA 94720 USA.
[Richards, Gordon T.] Drexel Univ, Dept Phys, Philadelphia, PA 19104 USA.
[Richards, Gordon T.] Max Planck Inst Astron, D-69117 Heidelberg, Germany.
[Myers, Adam D.] Univ Wyoming, Dept Phys & Astron, Laramie, WY 82071 USA.
[Palanque-Delabrouille, Nathalie; Yeche, Christophe] CEA, Ctr Saclay, IRFU, F-91191 Gif Sur Yvette, France.
[Strauss, Michael A.] Princeton Univ, Dept Astrophys Sci, Princeton, NJ 08544 USA.
[Anderson, Scott F.] Univ Washington, Dept Astron, Seattle, WA 98195 USA.
[Shen, Yue; Swanson, Molly E. C.] Harvard Smithsonian Ctr Astrophys, Cambridge, MA 02138 USA.
[Brandt, W. N.; Schneider, Donald P.] Penn State Univ, Dept Astron & Astrophys, University Pk, PA 16802 USA.
[Brandt, W. N.; Schneider, Donald P.] Penn State Univ, Inst Gravitat & Cosmos, University Pk, PA 16802 USA.
[Aubourg, Eric] Univ Paris Diderot, APC, CNRS IN2P3, CEA IRFU,Observ Paris,Sorbonne Paris Cite, Paris, France.
[Bizyaev, Dmitry; Brewington, Howard; Brinkmann, J.; Ebelke, Garrett; Malanushenko, Elena; Malanushenko, Viktor; Oravetz, Daniel; Pan, Kaike; Simmons, Audrey; Snedden, Stephanie] Apache Point Observ, Sunspot, NM 88349 USA.
[Bovy, Jo] Inst Adv Study, Princeton, NJ 08540 USA.
[DeGraf, Colin; Di Matteo, Tiziana; Mandelbaum, Rachel] Carnegie Mellon Univ, McWilliams Ctr Cosmol, Pittsburgh, PA 15213 USA.
[Ge, Jian] Univ Florida, Dept Astron, Gainesville, FL 32611 USA.
[Maraston, Claudia] Univ Portsmouth, Inst Cosmol & Gravitat, Portsmouth PO1 3FX, Hants, England.
[Muna, Demitri] NYU, Ctr Cosmol & Particle Phys, Dept Phys, New York, NY 10003 USA.
[Paris, Isabelle; Petitjean, Patrick] UPMC, CNRS, Inst Astrophys Paris, UMR7095, F-75014 Paris, France.
[Paris, Isabelle] Univ Chile, Dept Astron, Santiago, Chile.
[Schawinski, Kevin] Yale Univ, Dept Phys, New Haven, CT 06511 USA.
[Silverman, John D.] Univ Tokyo, IPMU, Kashiwa, Chiba 2778568, Japan.
[Streblyanska, Alina] Inst Astrofis Canarias, E-38200 San Cristobal la Laguna, Tenerife, Spain.
[Weinberg, David H.] Ohio State Univ, Dept Astron, Columbus, OH 43210 USA.
[Weinberg, David H.] Ohio State Univ, Ctr Cosmol & AstroParticle Phys, Columbus, OH 43210 USA.
[York, Donald] Univ Chicago, Dept Astron & Astrophys, Chicago, IL 60637 USA.
[York, Donald] Univ Chicago, Fermi Inst, Chicago, IL 60637 USA.
RP Ross, NP (reprint author), Lawrence Berkeley Natl Lab, 1 Cyclotron Rd, Berkeley, CA 92420 USA.
EM npross@lbl.gov
RI Mandelbaum, Rachel/N-8955-2014; Di Matteo, Tiziana/O-4762-2014; White,
Martin/I-3880-2015; Brandt, William/N-2844-2015;
OI Mandelbaum, Rachel/0000-0003-2271-1527; Di Matteo,
Tiziana/0000-0002-6462-5734; White, Martin/0000-0001-9912-5070; Brandt,
William/0000-0002-0167-2453; Bovy, Jo/0000-0001-6855-442X; Schawinski,
Kevin/0000-0001-5464-0888
FU Alfred P. Sloan Foundation; University of Arizona; Brazilian
Participation Group; Brookhaven National Laboratory; University of
Cambridge; Carnegie Mellon University; University of Florida; French
Participation Group; German Participation Group; Harvard University;
Instituto de Astrofisica de Canarias; Michigan State/Notre Dame/JINA
Participation Group; Johns Hopkins University; Lawrence Berkeley
National Laboratory; Max Planck Institute for Astrophysics; Max Planck
Institute for Extraterrestrial Physics; New Mexico State University; New
York University; Ohio State University; Pennsylvania State University;
University of Portsmouth; Princeton University; Spanish Participation
Group; University of Tokyo; University of Utah; Vanderbilt University;
University of Virginia; University of Washington; Yale University;
National Science Foundation; U.S. Department of Energy Office of
Science; David and Lucile Packard Fellowship; NSF [AST 08-06861, AST
11-07682]; Alexander von Humboldt Foundation at the Max-Planck-Institut
fur Astronomie
FX Funding for SDSS-III has been provided by the Alfred P. Sloan
Foundation, the Participating Institutions, the National Science
Foundation, and the U.S. Department of Energy Office of Science. The
SDSS-III Web site is http://www.sdss3.org/.; SDSS-III is managed by the
Astrophysical Research Consortium for the Participating Institutions of
the SDSS-III Collaboration including the University of Arizona, the
Brazilian Participation Group, Brookhaven National Laboratory,
University of Cambridge, Carnegie Mellon University, University of
Florida, the French Participation Group, the German Participation Group,
Harvard University, the Instituto de Astrofisica de Canarias, the
Michigan State/Notre Dame/JINA Participation Group, Johns Hopkins
University, Lawrence Berkeley National Laboratory, Max Planck Institute
for Astrophysics, Max Planck Institute for Extraterrestrial Physics, New
Mexico State University, New York University, Ohio State University,
Pennsylvania State University, University of Portsmouth, Princeton
University, the Spanish Participation Group, University of Tokyo,
University of Utah, Vanderbilt University, University of Virginia,
University of Washington, and Yale University.; N.P.R. warmly thanks
Silvia Bonoli, Federico Marulli, Nikos Fanidakis and Phil Hopkins for
providing their model QLF data in a prompt manner. Matt George,
Genevieve Graves, Tom Shanks, Julie Wardlow and Gabor Worseck, also
provided very useful discussions. Paul Hewett was key in the
K-correction discussions. I. D. M. and X. F. acknowledge support from a
David and Lucile Packard Fellowship, and NSF grants AST 08-06861 and AST
11-07682. G. T. R. acknowledges the generous support of a research
fellowship from the Alexander von Humboldt Foundation at the
Max-Planck-Institut fur Astronomie and is grateful for the hospitality
of the Astronomisches Rechen-Institut and the Institute of Astronomy,
Cambridge.
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PA TEMPLE CIRCUS, TEMPLE WAY, BRISTOL BS1 6BE, ENGLAND
SN 0004-637X
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JI Astrophys. J.
PD AUG 10
PY 2013
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AR 14
DI 10.1088/0004-637X/773/1/14
PG 27
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SC Astronomy & Astrophysics
GA 193BN
UT WOS:000322531900014
ER
PT J
AU Torres, G
Ruiz-Rodriguez, D
Badenas, M
Prato, L
Schaefer, GH
Wasserman, LH
Mathieu, RD
Latham, DW
AF Torres, Guillermo
Ruiz-Rodriguez, Dary
Badenas, Mariona
Prato, L.
Schaefer, G. H.
Wasserman, Lawrence H.
Mathieu, Robert D.
Latham, David W.
TI THE QUADRUPLE PRE-MAIN-SEQUENCE SYSTEM LkCa 3: IMPLICATIONS FOR STELLAR
EVOLUTION MODELS
SO ASTROPHYSICAL JOURNAL
LA English
DT Article
DE binaries: close; binaries: spectroscopic; stars: individual (LkCa3);
stars: pre-main sequence; stars: rotation; techniques: radial velocities
ID T-TAURI STARS; LOW-MASS STARS; CLOSE BINARY-SYSTEMS; KECK II TELESCOPE;
SPECTROSCOPIC BINARIES; VLBA DETERMINATION; FORMING REGIONS; BROWN
DWARFS; GG TAURI; INTERSTELLAR EXTINCTION
AB We report the discovery that the pre-main-sequence (PMS) object LkCa 3 in the Taurus-Auriga star-forming region is a hierarchical quadruple system of M stars. It was previously known to be a close (similar to 0.'' 5) visual pair, with one component being a moderately eccentric 12.94 day single-lined spectroscopic binary. A re-analysis of archival optical spectra complemented by new near-infrared (NIR) spectroscopy shows both visual components to be double lined; the second one has a period of 4.06 days and a circular orbit. In addition to the orbital elements, we determine optical and NIR flux ratios, effective temperatures, and projected rotational velocities for all four stars. Using existing photometric monitoring observations of the system that had previously revealed the rotational period of the primary in the longer-period binary, we also detect the rotational signal of the primary in the 4.06 day binary, which is synchronized with the orbital motion. With only the assumption of coevality, a comparison of all of these constraints with current stellar evolution models from the Dartmouth series points to an age of 1.4 Myr and a distance of 133 pc, consistent with previous estimates for the region and suggesting that the system is on the near side of the Taurus complex. Similar comparisons of the properties of LkCa 3 and the well-known quadruple PMS system GG Tau with the widely used models from the Lyon series for a mixing length parameter of alpha(ML) = 1.0 strongly favor the Dartmouth models.
C1 [Torres, Guillermo; Latham, David W.] Harvard Smithsonian Ctr Astrophys, Cambridge, MA 02138 USA.
[Ruiz-Rodriguez, Dary; Prato, L.; Wasserman, Lawrence H.] Lowell Observ, Flagstaff, AZ 86001 USA.
[Badenas, Mariona] Yale Univ, Dept Astron, New Haven, CT 06520 USA.
[Schaefer, G. H.] CHARA Array Georgia State Univ, Mt Wilson Observ, Mt Wilson, CA 91023 USA.
[Mathieu, Robert D.] Univ Wisconsin, Dept Astron, Madison, WI 53706 USA.
RP Torres, G (reprint author), Harvard Smithsonian Ctr Astrophys, 60 Garden St, Cambridge, MA 02138 USA.
EM gtorres@cfa.harvard.edu
FU NSF; W. M. Keck Foundation; NSF [AST-1007992, AST-1009136]; NASA Keck PI
Data Award [2003B, 2004A]
FX We thank the anonymous referee for interesting suggestions, as well as
I. Baraffe and R. White for helpful exchanges about stellar evolution
models. The spectroscopic observations at the CfA were obtained with the
able assistance of P. Berlind, R. Davis, L. Hartmann, E. Horine, A.
Milone, and J. Peters. We are grateful to R. Davis for maintaining the
CfA echelle database over the years. We also thank C. Beichman for the
opportunity to obtain an additional NIRSPEC spectrum on the night of UT
2010 November 22. We thank the staff at Keck Observatory for their
superb support. Data presented herein were obtained at the W. M. Keck
Observatory from telescope time allocated to the National Aeronautics
and Space Administration through the agency's scientific partnership
with the California Institute of Technology and the University of
California. L. P. acknowledges support from the NASA Keck PI Data Award
administered by NExScI (semesters 2003B and 2004A). Keck telescope time
was also granted by NOAO through the Telescope System Instrumentation
Program (TSIP). TSIP was funded by the NSF. The Observatory was made
possible by the generous financial support of the W. M. Keck Foundation.
We recognize the Hawaiian community for the opportunity to conduct these
observations from the summit of Mauna Kea. This work was partially
supported by NSF grants AST-1007992 to G. T. and AST-1009136 to L. P.
The research has made use of NASA's Astrophysics Data System Abstract
Service, and of the SIMBAD and VizieR databases, operated at the CDS,
Strasbourg, France.
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PA TEMPLE CIRCUS, TEMPLE WAY, BRISTOL BS1 6BE, ENGLAND
SN 0004-637X
J9 ASTROPHYS J
JI Astrophys. J.
PD AUG 10
PY 2013
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PG 15
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SC Astronomy & Astrophysics
GA 193BN
UT WOS:000322531900040
ER
PT J
AU Wilkes, BJ
Kuraszkiewicz, J
Haas, M
Barthel, P
Leipski, C
Willner, SP
Worrall, DM
Birkinshaw, M
Antonucci, R
Ashby, MLN
Chini, R
Fazio, GG
Lawrence, C
Ogle, P
Schulz, B
AF Wilkes, Belinda J.
Kuraszkiewicz, Joanna
Haas, Martin
Barthel, Peter
Leipski, Christian
Willner, S. P.
Worrall, D. M.
Birkinshaw, Mark
Antonucci, Robert
Ashby, M. L. N.
Chini, Rolf
Fazio, G. G.
Lawrence, Charles
Ogle, Patrick
Schulz, Bernhard
TI REVEALING THE HEAVILY OBSCURED ACTIVE GALACTIC NUCLEUS POPULATION OF
HIGH-REDSHIFT 3CRR SOURCES WITH CHANDRA X-RAY OBSERVATIONS
SO ASTROPHYSICAL JOURNAL
LA English
DT Article
DE quasars: general; X-rays: galaxies
ID COMPACT STEEP-SPECTRUM; XMM-NEWTON OBSERVATIONS; POWERFUL RADIO
GALAXIES; DIGITAL SKY SURVEY; EXTRAGALACTIC LEGACY SURVEY;
DUAL-FREQUENCY OBSERVATIONS; SUPERMASSIVE BLACK-HOLES; EXTENDED GROTH
STRIP; SEYFERT 2 GALAXIES; DEEP FIELD SOUTH
AB Chandra observations of a complete, flux-limited sample of 38 high-redshift (1 < z < 2), low-frequency-selected (and so unbiased in orientation) 3CRR radio sources are reported. The sample includes 21 quasars (=broad-line radio galaxies) and 17 narrow-line radio galaxies (NLRGs) with matched 178 MHz radio luminosity (log L-R(5 GHz) similar to 44-45). The quasars have high radio core fraction, high X-ray luminosities (log L-X similar to 45-46), and soft X-ray hardness ratios (HR similar to -0.5) indicating low obscuration. The NLRGs have lower core fraction, lower apparent X-ray luminosities (log L-X similar to 43-45), and mostly hard X-ray hardness ratios (HR > 0) indicating obscuration (N-H similar to 10(22)-10(24) cm(-2)). These properties and the correlation between obscuration and radio core fraction are consistent with orientation-dependent obscuration as in unification models. About half the NLRGs have soft X-ray hardness ratios and/or a high [O III] emission line to X-ray luminosity ratio suggesting obscuration by Compton thick (CT) material so that scattered nuclear or extended X-ray emission dominates (as in NGC 1068). The ratios of unobscured to Compton-thin (10(22) cm(-2) < N-H(int) < 1.5 x 10(24) cm(-2)) to CT (N-H(int) > 1.5 x 10(24) cm(-2)) is 2.5:1.4:1 in this high-luminosity, radio-selected sample. The obscured fraction is 0.5, higher than is typically reported for active galactic nuclei at comparable luminosities from multi-wavelength surveys (0.1-0.3). Assuming random nuclear orientation, the unobscured half-opening angle of the disk/wind/torus structure is similar to 60 degrees and the obscuring material covers 30 degrees, similar to 12 degrees of which is CT. The multi-wavelength properties reveal that many NLRGs have intrinsic absorption 10-1000x higher than indicated by their X-ray hardness ratios, and their true L-X values are similar to 10-100x larger than the hardness-ratio absorption corrections would indicate.
C1 [Wilkes, Belinda J.; Kuraszkiewicz, Joanna; Willner, S. P.; Ashby, M. L. N.; Fazio, G. G.] Harvard Smithsonian Ctr Astrophys, Cambridge, MA 02138 USA.
[Haas, Martin; Chini, Rolf] Ruhr Univ Bochum, Astron Inst, D-44801 Bochum, Germany.
[Barthel, Peter] Univ Groningen, Kapteyn Inst, NL-9747 AD Groningen, Netherlands.
[Leipski, Christian] MPIA, D-69117 Heidelberg, Germany.
[Worrall, D. M.; Birkinshaw, Mark] Univ Bristol, HH Wills Phys Lab, Bristol BS8 1TL, Avon, England.
[Antonucci, Robert] Univ Calif Santa Barbara, Dept Phys, Santa Barbara, CA 93106 USA.
[Chini, Rolf] Univ Catolica Norte, Inst Astron, Antofagasta, Chile.
[Lawrence, Charles] JPL, Pasadena, CA 91109 USA.
[Ogle, Patrick] CALTECH, Spitzer Sci Ctr, Pasadena, CA 91125 USA.
[Schulz, Bernhard] CALTECH, IPAC, Pasadena, CA 91125 USA.
RP Wilkes, BJ (reprint author), Harvard Smithsonian Ctr Astrophys, 60 Garden St, Cambridge, MA 02138 USA.
OI Wilkes, Belinda/0000-0003-1809-2364
FU National Aeronautics and Space Administration [G08-9106X, NAS8-03060];
Chandra X-Ray Center; Smithsonian Institution Endowment, Scholarly
Studies Program [40488100HH0017]
FX Support for this work was provided by the National Aeronautics and Space
Administration through Chandra Award Number G08-9106X, by the Chandra
X-Ray Center, which is operated by the Smithsonian Astrophysical
Observatory for and on behalf of the National Aeronautics Space
Administration under contract NAS8-03060 (Chandra X-Ray Center) and by
the Smithsonian Institution Endowment, Scholarly Studies Program, fund
40488100HH0017. The scientific results in this article are based to a
significant degree on observations made by the Chandra X-Ray Observatory
(CXO). We thank Mark Avara and Margaret Yellen for their early work on
this project.
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JI Astrophys. J.
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SC Astronomy & Astrophysics
GA 193BN
UT WOS:000322531900015
ER
PT J
AU Zeng, LZ
Bennett, CL
Chapman, NL
Chuss, DT
Jimenez-Serra, I
Novak, G
Vaillancourt, JE
AF Zeng, Lingzhen
Bennett, Charles L.
Chapman, Nicholas L.
Chuss, David T.
Jimenez-Serra, Izaskun
Novak, Giles
Vaillancourt, John E.
TI THE SUBMILLIMETER POLARIZATION SPECTRUM OF M17
SO ASTROPHYSICAL JOURNAL
LA English
DT Article
DE ISM: clouds; ISM: individual objects (M17, NGC 6618); ISM: magnetic
fields; polarization; submillimeter: ISM
ID MAGNETIC-FIELDS; GRAIN ALIGNMENT; MOLECULAR CLOUDS; INFRARED
POLARIZATION; INTERSTELLAR GRAINS; RADIATIVE TORQUES; GALACTIC CLOUDS;
SHARC-II; EMISSION; ORION
AB We present 450 mu m polarimetric observations of the M17 molecular cloud obtained with the SHARP polarimeter at the Caltech Submillimeter Observatory. Across the observed region, the magnetic field orientation is consistent with previous submillimeter and far-infrared polarization measurements. Our observations are centered on a region of the molecular cloud that has been compressed by stellar winds from a cluster of OB stars. We have compared these new data with previous 350 mu m polarimetry and find an anti-correlation between the 450 and 350 mu m polarization magnitude ratio and the ratio of 21 cm to 450 mu m intensity. The polarization ratio is lower near the east end of the studied region where the cloud is exposed to stellar winds and radiation. At the west end of the region, the polarization ratio is higher. We interpret the varying polarization spectrum as evidence supporting the radiative alignment torque model for grain alignment, implying higher alignment efficiency in the region that is exposed to a higher anisotropic radiation field.
C1 [Zeng, Lingzhen; Jimenez-Serra, Izaskun] Harvard Smithsonian Ctr Astrophys, Cambridge, MA 02138 USA.
[Zeng, Lingzhen; Bennett, Charles L.] Johns Hopkins Univ, Dept Phys & Astron, Baltimore, MD 21218 USA.
[Chapman, Nicholas L.; Novak, Giles] Northwestern Univ, CIERA, Evanston, IL 60208 USA.
[Chapman, Nicholas L.; Novak, Giles] Northwestern Univ, Dept Phys & Astron, Evanston, IL 60208 USA.
[Chuss, David T.] NASA, Goddard Space Flight Ctr, Greenbelt, MD 20771 USA.
[Vaillancourt, John E.] NASA, Ames Res Ctr, SOFIA Sci Ctr, Univ Space Res Assoc, Moffett Field, CA 94035 USA.
RP Zeng, LZ (reprint author), Harvard Smithsonian Ctr Astrophys, 60 Garden St, Cambridge, MA 02138 USA.
EM lingzhen@cfa.harvard.edu
OI Vaillancourt, John/0000-0001-8916-1828; Zeng,
Lingzhen/0000-0001-6924-9072
FU National Science Foundation [AST-0838261, AST-0909030]
FX We thank C. Brogan for providing the 21 cm intensity data. We are
grateful to A. Chepurnov, R. Hildebrand, and A. Lazarian for
illuminating discussions. This material is based upon work at the
Caltech Submillimeter Observatory, which is operated by the California
Institute of Technology under cooperative agreement with the National
Science Foundation (AST-0838261). We thank the National Science
Foundation for supporting SHARP, via grant AST-0909030 to Northwestern
University.
NR 36
TC 3
Z9 3
U1 0
U2 6
PU IOP PUBLISHING LTD
PI BRISTOL
PA TEMPLE CIRCUS, TEMPLE WAY, BRISTOL BS1 6BE, ENGLAND
SN 0004-637X
J9 ASTROPHYS J
JI Astrophys. J.
PD AUG 10
PY 2013
VL 773
IS 1
AR 29
DI 10.1088/0004-637X/773/1/29
PG 12
WC Astronomy & Astrophysics
SC Astronomy & Astrophysics
GA 193BN
UT WOS:000322531900029
ER
PT J
AU Qi, CH
Oberg, KI
Wilner, DJ
D'Alessio, P
Bergin, E
Andrews, SM
Blake, GA
Hogerheijde, MR
van Dishoeck, EF
AF Qi, Chunhua
Oeberg, Karin I.
Wilner, David J.
D'Alessio, Paola
Bergin, Edwin
Andrews, Sean M.
Blake, Geoffrey A.
Hogerheijde, Michiel R.
van Dishoeck, Ewine F.
TI Imaging of the CO Snow Line in a Solar Nebula Analog
SO SCIENCE
LA English
DT Article
ID PROTOPLANETARY DISKS; STAR-FORMATION; X-RAY; ICE; CHEMISTRY; MOLECULES;
WATER; PLANETESIMALS; EVOLUTION; EMISSION
AB Planets form in the disks around young stars. Their formation efficiency and composition are intimately linked to the protoplanetary disk locations of "snow lines" of abundant volatiles. We present chemical imaging of the carbon monoxide (CO) snow line in the disk around TW Hya, an analog of the solar nebula, using high spatial and spectral resolution Atacama Large Millimeter/Submillimeter Array observations of diazenylium (N2H+), a reactive ion present in large abundance only where CO is frozen out. The N2H+ emission is distributed in a large ring, with an inner radius that matches CO snow line model predictions. The extracted CO snow line radius of similar to 30 astronomical units helps to assess models of the formation dynamics of the solar system, when combined with measurements of the bulk composition of planets and comets.
C1 [Qi, Chunhua; Wilner, David J.; Andrews, Sean M.] Harvard Smithsonian Ctr Astrophys, Cambridge, MA 02138 USA.
[Oeberg, Karin I.] Univ Virginia, Dept Chem, Charlottesville, VA 22904 USA.
[Oeberg, Karin I.] Univ Virginia, Dept Astron, Charlottesville, VA 22904 USA.
[D'Alessio, Paola] Univ Nacl Autonoma Mexico, Ctr Radioastron & Astrofis, Mexico City 58089, DF, Mexico.
[Bergin, Edwin] Univ Michigan, Dept Astron, Ann Arbor, MI 48109 USA.
[Blake, Geoffrey A.] CALTECH, Div Geol & Planetary Sci, Pasadena, CA 91125 USA.
[Hogerheijde, Michiel R.; van Dishoeck, Ewine F.] Leiden Univ, Leiden Observ, NL-2300 RA Leiden, Netherlands.
[van Dishoeck, Ewine F.] Max Planck Inst Extraterr Phys, D-85748 Garching, Germany.
RP Qi, CH (reprint author), Harvard Smithsonian Ctr Astrophys, 60 Garden St, Cambridge, MA 02138 USA.
EM cqi@cfa.harvard.edu
FU NASA Origins of Solar Systems [NNX11AK63]; Programa de Apoyo a Proyectos
de Investigacion e Innovacion Tecnologica-UNAM; NSF [1008800];
Smithsonian Institution; Academia Sinica; [2004-214]
FX We are grateful to S. Schnee for data calibration and reduction
assistance. C. Q. thanks the Smithsonian Astrophysical Observatory (SAO)
Radio Telescope Data Center (RTDC) staff for their generous
computational support. C. Q., K.I.O., and D.J.W. acknowledge grant
NNX11AK63 from NASA Origins of Solar Systems. P. D. acknowledges a grant
from Programa de Apoyo a Proyectos de Investigacion e Innovacion
Tecnologica-UNAM. E. B. acknowledges support from NSF grant 1008800.
This Report makes use of the following ALMA data: ADS JAO.
ALMA#2011.0.00340.S. ALMA is a partnership of the European Southern
Observatory (ESO) (representing its member states), NSF (USA), and the
National Institute of Natural Sciences (Japan), together with the
National Research Council (Canada) and the National Science Council and
Academia Sinica's Institute of Astronomy and Astrophysics (ASIAA)
(Taiwan), in cooperation with the Republic of Chile. The Joint ALMA
Observatory is operated by ESO, Associated Universities, Inc.
(AUI)/National Radio Astronomy Observatory, and the National
Astronomical Observatory of Japan. We also make use of the Submillimeter
Array (SMA) data: project #2004-214 (principal investigator, C. Q.). The
SMA is a joint project between SAO and ASIAA and is funded by the
Smithsonian Institution and the Academia Sinica.
NR 33
TC 75
Z9 75
U1 1
U2 21
PU AMER ASSOC ADVANCEMENT SCIENCE
PI WASHINGTON
PA 1200 NEW YORK AVE, NW, WASHINGTON, DC 20005 USA
SN 0036-8075
J9 SCIENCE
JI Science
PD AUG 9
PY 2013
VL 341
IS 6146
BP 630
EP 632
DI 10.1126/science.1239560
PG 3
WC Multidisciplinary Sciences
SC Science & Technology - Other Topics
GA 197XC
UT WOS:000322884800031
PM 23868917
ER
PT J
AU Brown, C
Burslem, DFRP
Illian, JB
Bao, L
Brockelman, W
Cao, M
Chang, LW
Dattaraja, HS
Davies, S
Gunatilleke, CVS
Gunatilleke, IAUN
Huang, J
Kassim, AR
LaFrankie, JV
Lian, J
Lin, L
Ma, K
Mi, X
Nathalang, A
Noor, S
Ong, P
Sukumar, R
Su, SH
Sun, IF
Suresh, HS
Tan, S
Thompson, J
Uriarte, M
Valencia, R
Yap, SL
Ye, W
Law, R
AF Brown, C.
Burslem, D. F. R. P.
Illian, J. B.
Bao, L.
Brockelman, W.
Cao, M.
Chang, L. W.
Dattaraja, H. S.
Davies, S.
Gunatilleke, C. V. S.
Gunatilleke, I. A. U. N.
Huang, J.
Kassim, A. R.
LaFrankie, J. V.
Lian, J.
Lin, L.
Ma, K.
Mi, X.
Nathalang, A.
Noor, S.
Ong, P.
Sukumar, R.
Su, S. H.
Sun, I. F.
Suresh, H. S.
Tan, S.
Thompson, J.
Uriarte, M.
Valencia, R.
Yap, S. L.
Ye, W.
Law, R.
TI Multispecies coexistence of trees in tropical forests: spatial signals
of topographic niche differentiation increase with environmental
heterogeneity
SO PROCEEDINGS OF THE ROYAL SOCIETY B-BIOLOGICAL SCIENCES
LA English
DT Article
DE species coexistence; tropical forest; niche differentiation; neutral
theory; spatial pattern; cross-pair overlap distribution
ID LANKAN DIPTEROCARP FOREST; HABITAT ASSOCIATIONS; SPECIES COEXISTENCE;
BETA-DIVERSITY; ABUNDANCE; PATTERNS; COMMUNITIES; DISPERSAL; GRADIENTS;
DISTRIBUTIONS
AB Neutral and niche theories give contrasting explanations for the maintenance of tropical tree species diversity. Both have some empirical support, but methods to disentangle their effects have not yet been developed. We applied a statistical measure of spatial structure to data from 14 large tropical forest plots to test a prediction of niche theory that is incompatible with neutral theory: that species in heterogeneous environments should separate out in space according to their niche preferences. We chose plots across a range of topographic heterogeneity, and tested whether pairwise spatial associations among species were more variable in more heterogeneous sites. We found strong support for this prediction, based on a strong positive relationship between variance in the spatial structure of species pairs and topographic heterogeneity across sites. We interpret this pattern as evidence of pervasive niche differentiation, which increases in importance with increasing environmental heterogeneity.
C1 [Brown, C.] Univ Edinburgh, Sch Geosci, Edinburgh EH8 9XP, Midlothian, Scotland.
[Brown, C.; Illian, J. B.] Univ St Andrews, Sch Math & Stat, CREEM, St Andrews KY16 9LZ, Fife, Scotland.
[Burslem, D. F. R. P.] Univ Aberdeen, Inst Biol & Environm Sci, Aberdeen AB24 3UU, Scotland.
[Bao, L.; Ma, K.; Mi, X.] Chinese Acad Sci, Inst Bot, State Key Lab Vegetat & Environm Change, Beijing 100093, Peoples R China.
[Brockelman, W.; Nathalang, A.] BIOTEC Cent Res Unit, Ecol Lab, Klongluang 12120, Pathum Thani, Thailand.
[Cao, M.; Lin, L.] Chinese Acad Sci, Xishuangbanna Trop Bot Garden, Key Lab Trop Forest Ecol, Kunming 650223, Peoples R China.
[Chang, L. W.; Su, S. H.] Taiwan Forestry Res Inst, Taipei 10066, Taiwan.
[Dattaraja, H. S.; Sukumar, R.; Suresh, H. S.] Indian Inst Sci, Ctr Ecol Sci, Bangalore 560012, Karnataka, India.
[Davies, S.] Harvard Univ, Ctr Trop Forest Sci, Cambridge, MA 02138 USA.
[Davies, S.] Smithsonian Trop Res Inst, Panama City, Panama.
[Gunatilleke, C. V. S.; Gunatilleke, I. A. U. N.] Univ Peradeniya, Dept Bot, Peradeniya 20400, Sri Lanka.
[Huang, J.; Lian, J.; Ye, W.] Chinese Acad Sci, South China Bot Garden, Guangzhou 510650, Guangdong, Peoples R China.
[Kassim, A. R.; Noor, S.] Forest Res Inst Malaysia, Div Forest Environm, Forest Ecol Unit, Kuala Lumpur 52109, Malaysia.
[LaFrankie, J. V.; Ong, P.; Yap, S. L.] Univ Philippines Diliman, Inst Biol, Quezon City, Philippines.
[Sun, I. F.] Natl Dong Hwa Univ, Dept Nat Resources & Environm Studies, Hualien 974, Taiwan.
[Tan, S.] Forest Dept Sarawak, Kuching 93660, Sarawak, Malaysia.
[Thompson, J.] Univ Puerto Rico, Inst Trop Ecosyst Studies, Luquillo, PR 00773 USA.
[Thompson, J.] Ctr Ecol & Hydrol, Penicuik EH26 0QB, Midlothian, Scotland.
[Uriarte, M.] Columbia Univ, New York, NY 10027 USA.
[Valencia, R.] Pontifical Catholic Univ Ecuador, Sch Biol Sci, Plant Ecol Lab, Quito, Ecuador.
[Law, R.] Univ York, York Ctr Complex Syst Anal, York YO10 5EG, N Yorkshire, England.
[Law, R.] Univ York, Dept Biol, York YO10 5EG, N Yorkshire, England.
RP Brown, C (reprint author), Univ Edinburgh, Sch Geosci, Drummond St, Edinburgh EH8 9XP, Midlothian, Scotland.
EM calum.brown@ed.ac.uk
RI Uriarte, Maria/L-8944-2013; Thompson, Jill/K-2200-2012; Brown,
Calum/D-4341-2017;
OI Thompson, Jill/0000-0002-4370-2593; Brown, Calum/0000-0001-9331-1008;
Burslem, David/0000-0001-6033-0990
FU Microsoft
FX The CTFS plots were individually supported from a number of sources,
details of which are given in the electronic supplementary material,
text S2. C.B. was financially supported by a Microsoft PhD Scholarship.
NR 56
TC 20
Z9 21
U1 5
U2 103
PU ROYAL SOC
PI LONDON
PA 6-9 CARLTON HOUSE TERRACE, LONDON SW1Y 5AG, ENGLAND
SN 0962-8452
EI 1471-2954
J9 P ROY SOC B-BIOL SCI
JI Proc. R. Soc. B-Biol. Sci.
PD AUG 7
PY 2013
VL 280
IS 1764
AR 20130502
DI 10.1098/rspb.2013.0502
PG 8
WC Biology; Ecology; Evolutionary Biology
SC Life Sciences & Biomedicine - Other Topics; Environmental Sciences &
Ecology; Evolutionary Biology
GA 167RA
UT WOS:000320649400002
PM 23782876
ER
PT J
AU Okie, JG
Boyer, AG
Brown, JH
Costa, DP
Ernest, SKM
Evans, AR
Fortelius, M
Gittleman, JL
Hamilton, MJ
Harding, LE
Lintulaakso, K
Lyons, SK
Saarinen, JJ
Smith, FA
Stephens, PR
Theodor, J
Uhen, MD
Sibly, RM
AF Okie, Jordan G.
Boyer, Alison G.
Brown, James H.
Costa, Daniel P.
Ernest, S. K. Morgan
Evans, Alistair R.
Fortelius, Mikael
Gittleman, John L.
Hamilton, Marcus J.
Harding, Larisa E.
Lintulaakso, Kari
Lyons, S. Kathleen
Saarinen, Juha J.
Smith, Felisa A.
Stephens, Patrick R.
Theodor, Jessica
Uhen, Mark D.
Sibly, Richard M.
TI Effects of allometry, productivity and lifestyle on rates and limits of
body size evolution
SO PROCEEDINGS OF THE ROYAL SOCIETY B-BIOLOGICAL SCIENCES
LA English
DT Article
DE slow-fast life-history continuum; evolutionary rate; metabolic theory of
ecology; maximum body size; macroecology; mammal macroevolution
ID MOLECULAR CLOCK; METABOLIC-RATE; COPES RULE; HISTORY; MAMMALS; TIME;
TEMPERATURE; DYNAMICS; PATTERNS; RESPONSES
AB Body size affects nearly all aspects of organismal biology, so it is important to understand the constraints and dynamics of body size evolution. Despite empirical work on the macroevolution and macroecology of minimum and maximum size, there is little general quantitative theory on rates and limits of body size evolution. We present a general theory that integrates individual productivity, the lifestyle component of the slow-fast life-history continuum, and the allometric scaling of generation time to predict a clade's evolutionary rate and asymptotic maximum body size, and the shape of macroevolutionary trajectories during diversifying phases of size evolution. We evaluate this theory using data on the evolution of clade maximum body sizes in mammals during the Cenozoic. As predicted, clade evolutionary rates and asymptotic maximum sizes are larger in more productive clades (e.g. baleen whales), which represent the fast end of the slow-fast lifestyle continuum, and smaller in less productive clades (e.g. primates). The allometric scaling exponent for generation time fundamentally alters the shape of evolutionary trajectories, so allometric effects should be accounted for in models of phenotypic evolution and interpretations of macroevolutionary body size patterns. This work highlights the intimate interplay between the macroecological and macroevolutionary dynamics underlying the generation and maintenance of morphological diversity.
C1 [Okie, Jordan G.] Arizona State Univ, Sch Earth & Space Explorat, Tempe, AZ 85287 USA.
[Okie, Jordan G.; Brown, James H.; Hamilton, Marcus J.; Harding, Larisa E.; Smith, Felisa A.] Univ New Mexico, Dept Biol, Albuquerque, NM 87131 USA.
[Boyer, Alison G.] Univ Tennessee, Dept Ecol & Evolutionary Biol, Knoxville, TN USA.
[Brown, James H.; Hamilton, Marcus J.] Santa Fe Inst, Santa Fe, NM 87501 USA.
[Costa, Daniel P.] Univ Calif Santa Cruz, Dept Ecol & Evolutionary Biol, Santa Cruz, CA 95064 USA.
[Ernest, S. K. Morgan] Utah State Univ, Dept Biol, Logan, UT 84322 USA.
[Ernest, S. K. Morgan] Utah State Univ, Ctr Ecol, Logan, UT 84322 USA.
[Evans, Alistair R.] Monash Univ, Sch Biol Sci, Melbourne, Vic 3004, Australia.
[Evans, Alistair R.] Museum Victoria, Melbourne, Vic, Australia.
[Fortelius, Mikael; Lintulaakso, Kari; Saarinen, Juha J.] Univ Helsinki, Dept Geosci & Geog, Helsinki, Finland.
[Gittleman, John L.; Stephens, Patrick R.] Univ Georgia, Odum Sch Ecol, Athens, GA 30602 USA.
[Hamilton, Marcus J.] Univ New Mexico, Dept Anthropol, Albuquerque, NM 87131 USA.
[Lyons, S. Kathleen] Smithsonian Inst, Dept Paleobiol, Washington, DC 20560 USA.
[Theodor, Jessica] Univ Calgary, Dept Biol Sci, Calgary, AB T2N 1N4, Canada.
[Uhen, Mark D.] George Mason Univ, Dept Atmospher Ocean & Earth Sci, Fairfax, VA 22030 USA.
[Sibly, Richard M.] Univ Reading, Sch Biol Sci, Reading, Berks, England.
RP Okie, JG (reprint author), Arizona State Univ, Sch Earth & Space Explorat, Tempe, AZ 85287 USA.
EM jordan.okie@asu.edu
RI Evans, Alistair/D-4239-2011; Ernest, SK Morgan/O-2532-2015;
OI Evans, Alistair/0000-0002-4078-4693; Ernest, SK
Morgan/0000-0002-6026-8530; Sibly, Richard/0000-0001-6828-3543;
Lintulaakso, Kari/0000-0001-9627-8821; Fortelius,
Mikael/0000-0002-4851-783X
FU National Science Foundation Grant Integrating Macroecological Pattern
and Processes across Scales Research Coordination Network [DEB 0541625];
University of New Mexico's Program in Interdisciplinary Biological and
Biomedical Sciences; Howard Hughes Medical Institute under the National
Institute of Biomedical Imaging and Bioengineering Interfaces
Initiative; Arizona State University's School of Earth and Space
Exploration; National Aeronautics and Space Administration; NASA
Astrobiology Institute
FX We thank Chris Venditti, P. David Polly and an anonymous reviewer for
helpful feedback. This study was supported by National Science
Foundation Grant Integrating Macroecological Pattern and Processes
across Scales Research Coordination Network DEB 0541625 (to F.A.S.,
S.K.L. and S.K.M.E., principal investigators). Financial support to J.
Okie was provided by University of New Mexico's Program in
Interdisciplinary Biological and Biomedical Sciences, which is funded by
the Howard Hughes Medical Institute under the National Institute of
Biomedical Imaging and Bioengineering Interfaces Initiative; an
Exploration Postdoctoral Fellowship from Arizona State University's
School of Earth and Space Exploration; and a Postdoctoral Fellowship
from the National Aeronautics and Space Administration Postdoctoral
Program with the NASA Astrobiology Institute, which is administered by
Oak Ridge Associated Universities. This paper is IMPPS RCN publication
no. 19.
NR 56
TC 5
Z9 5
U1 6
U2 112
PU ROYAL SOC
PI LONDON
PA 6-9 CARLTON HOUSE TERRACE, LONDON SW1Y 5AG, ENGLAND
SN 0962-8452
EI 1471-2954
J9 P ROY SOC B-BIOL SCI
JI Proc. R. Soc. B-Biol. Sci.
PD AUG 7
PY 2013
VL 280
IS 1764
AR 20131007
DI 10.1098/rspb.2013.1007
PG 7
WC Biology; Ecology; Evolutionary Biology
SC Life Sciences & Biomedicine - Other Topics; Environmental Sciences &
Ecology; Evolutionary Biology
GA 167RA
UT WOS:000320649400011
PM 23760865
ER
PT J
AU Petaev, MI
Huang, SC
Jacobsen, SB
Zindler, A
AF Petaev, Michail I.
Huang, Shichun
Jacobsen, Stein B.
Zindler, Alan
TI Large Pt anomaly in the Greenland ice core points to a cataclysm at the
onset of Younger Dryas
SO PROCEEDINGS OF THE NATIONAL ACADEMY OF SCIENCES OF THE UNITED STATES OF
AMERICA
LA English
DT Article
DE meteorite impact; climate change; ICP-MS analysis; PGE
ID PLATINUM-GROUP ELEMENTS; IMPACT; ACCUMULATION; CIRCULATION; ACCRETION;
VOLCANISM; IRIDIUM; SHEET; MELT
AB One explanation of the abrupt cooling episode known as the Younger Dryas (YD) is a cosmic impact or airburst at the YD boundary (YDB) that triggered cooling and resulted in other calamities, including the disappearance of the Clovis culture and the extinction of many large mammal species. We tested the YDB impact hypothesis by analyzing ice samples from the Greenland Ice Sheet Project 2 (GISP2) ice core across the Bolling-Allerod/YD boundary for major and trace elements. We found a large Pt anomaly at the YDB, not accompanied by a prominent Ir anomaly, with the Pt/Ir ratios at the Pt peak exceeding those in known terrestrial and extraterrestrial materials. Whereas the highly fractionated Pt/Ir ratio rules out mantle or chondritic sources of the Pt anomaly, it does not allow positive identification of the source. Circumstantial evidence such as very high, superchondritic Pt/Al ratios associated with the Pt anomaly and its timing, different from other major events recorded on the GISP2 ice core such as well-understood sulfate spikes caused by volcanic activity and the ammonium and nitrate spike due to the biomass destruction, hints for an extraterrestrial source of Pt. Such a source could have been a highly differentiated object like an Ir-poor iron meteorite that is unlikely to result in an airburst or trigger wide wildfires proposed by the YDB impact hypothesis.
C1 [Petaev, Michail I.; Huang, Shichun; Jacobsen, Stein B.; Zindler, Alan] Harvard Univ, Dept Earth & Planetary Sci, Cambridge, MA 02138 USA.
[Petaev, Michail I.] Harvard Smithsonian Ctr Astrophys, Div Solar Stellar & Planetary Sci, Cambridge, MA 02138 USA.
RP Petaev, MI (reprint author), Harvard Univ, Dept Earth & Planetary Sci, 20 Oxford St, Cambridge, MA 02138 USA.
EM mpetaev@fas.harvard.edu
RI Huang, Shichun/A-3596-2008; Jacobsen, Stein/B-1759-2013
FU National Science Foundation [AGS-1007367]
FX We thank Prof. Wally Broecker for encouraging this study, Dr. Mark S.
Twickler for providing the GISP2 ice samples, and Dr. Robert P. Ackert
for inspiring discussions. We also thank H. J. Melosh and two anonymous
reviewers for helpful reviews. This work was supported by National
Science Foundation Grant AGS-1007367 (to S.B.J.).
NR 30
TC 18
Z9 18
U1 5
U2 43
PU NATL ACAD SCIENCES
PI WASHINGTON
PA 2101 CONSTITUTION AVE NW, WASHINGTON, DC 20418 USA
SN 0027-8424
J9 P NATL ACAD SCI USA
JI Proc. Natl. Acad. Sci. U. S. A.
PD AUG 6
PY 2013
VL 110
IS 32
BP 12917
EP 12920
DI 10.1073/pnas.1303924110
PG 4
WC Multidisciplinary Sciences
SC Science & Technology - Other Topics
GA 196JQ
UT WOS:000322771100030
PM 23878232
ER
PT J
AU Schneps, MH
Thomson, JM
Sonnert, G
Pomplun, M
Chen, C
Heffner-Wong, A
AF Schneps, Matthew H.
Thomson, Jenny M.
Sonnert, Gerhard
Pomplun, Marc
Chen, Chen
Heffner-Wong, Amanda
TI Shorter Lines Facilitate Reading in Those Who Struggle
SO PLOS ONE
LA English
DT Article
ID DEVELOPMENTAL DYSLEXIA; EYE-MOVEMENTS; VISUAL-ATTENTION; LEFT
MININEGLECT; FIXATED WORD; CHILDREN; INFORMATION; SLUGGISH; READERS;
ADULTS
AB People with dyslexia, who ordinarily struggle to read, sometimes remark that reading is easier when e-readers are used. Here, we used eye tracking to observe high school students with dyslexia as they read using these devices. Among the factors investigated, we found that reading using a small device resulted in substantial benefits, improving reading speeds by 27%, reducing the number of fixations by 11%, and importantly, reducing the number of regressive saccades by more than a factor of 2, with no cost to comprehension. Given that an expected trade-off between horizontal and vertical regression was not observed when line lengths were altered, we speculate that these effects occur because sluggish attention spreads perception to the left as the gaze shifts during reading. Short lines eliminate crowded text to the left, reducing regression. The effects of attention modulation by the hand, and of increased letter spacing to reduce crowding, were also found to modulate the oculomotor dynamics in reading, but whether these factors resulted in benefits or costs depended on characteristics, such as visual attention span, that varied within our sample.
C1 [Schneps, Matthew H.; Sonnert, Gerhard; Chen, Chen; Heffner-Wong, Amanda] Harvard Smithsonian Ctr Astrophys, Sci Educ Dept, Cambridge, MA 02138 USA.
[Thomson, Jenny M.; Chen, Chen] Harvard Univ, Grad Sch Educ, Cambridge, MA 02138 USA.
[Pomplun, Marc] Univ Massachusetts, Dept Comp Sci, Boston, MA 02125 USA.
RP Schneps, MH (reprint author), Harvard Smithsonian Ctr Astrophys, Sci Educ Dept, 60 Garden St, Cambridge, MA 02138 USA.
EM mschneps@cfa.harvard.edu
OI Thomson, Jenny/0000-0002-4293-4851
FU National Science Foundation [HRD-0930962, HRD-1131039]; Youth Access
Grant program at the Smithsonian Institution
FX This article is based on work supported by the National Science
Foundation under Grants No. HRD-0930962 and HRD-1131039, and the Youth
Access Grant program at the Smithsonian Institution. Data are archived
at the Harvard IQSS Dataverse Network,
http://hdl.handle.net/10904/10244. The funders had no role in study
design, data collection and analysis, decision to publish, or
preparation of the manuscript.
NR 71
TC 13
Z9 13
U1 3
U2 32
PU PUBLIC LIBRARY SCIENCE
PI SAN FRANCISCO
PA 1160 BATTERY STREET, STE 100, SAN FRANCISCO, CA 94111 USA
SN 1932-6203
J9 PLOS ONE
JI PLoS One
PD AUG 5
PY 2013
VL 8
IS 8
AR e71161
DI 10.1371/journal.pone.0071161
PG 16
WC Multidisciplinary Sciences
SC Science & Technology - Other Topics
GA 218XC
UT WOS:000324465000186
PM 23940709
ER
PT J
AU Blaimer, BB
Fisher, BL
AF Blaimer, Bonnie B.
Fisher, Brian L.
TI Taxonomy of the Crematogaster degeeri-species-assemblage in the Malagasy
region (Hymenoptera: Formicidae)
SO EUROPEAN JOURNAL OF TAXONOMY
LA English
DT Article
AB We revise the species-level taxonomy of the Crematogaster (Crematogaster) degeeri-species-assemblage, a group of related ants occuring in Madagascar and the wider Malagasy region, and further provide an identification key to all species-groups of the genus Crematogaster in this region. Within the C. degeeri-assemblage, we recognize twelve species based upon morphological data from worker, queen and male ants, as well as genetic data from the barcode region of cytochrome oxidase I. Seven new species are described: Crematogaster alafara Blaimer sp. nov., C. bara Blaimer sp. nov., C. mafybe Blaimer sp. nov., C. maina Blaimer sp. nov., C. malahelo Blaimer sp. nov., C. masokely Blaimer sp. nov., C. ramamy Blaimer sp. nov. Crematogaster tricolor Gerstacker, 1859 (stat. rev.) and C. dentata Dalla Torre, 1893 (stat. nov.) are raised to species level, and the following new synonymies are proposed: Crematogaster degeeri lunaris Santschi, 1928 as a synonym of C. degeeri Forel, 1886; Crematogaster sewelli improba Forel, 1907 and C. sewelli mauritiana Forel, 1907 as synonyms of C. dentata Dalla Torre, 1893, and C. pacifica Santschi, 1919 as a synonym of C. lobata Emery, 1895. Species descriptions, images, and distribution maps and identification keys based on worker ants, as well as on queen ants where available, are presented for all twelve species. In addition, we present a molecular gene tree for cytochrome oxidase I and summarize levels of sequence divergence within and between species of the C. degeeri-species-assemblage. Our findings are discussed in the light of previous work on Malagasy Crematogaster ants.
C1 [Blaimer, Bonnie B.] Smithsonian Inst, Natl Museum Nat Hist, Dept Entomol, Washington, DC 20560 USA.
RP Blaimer, BB (reprint author), Smithsonian Inst, Natl Museum Nat Hist, Dept Entomol, Washington, DC 20560 USA.
EM bonnieblaimer@gmail.com
NR 0
TC 1
Z9 1
U1 0
U2 2
PU MUSEUM NATL HISTOIRE NATURELLE
PI PARIS
PA SERVICE PUBLICATIONS SCIENTIFIQUES, 57 RUE CUVIER, 75005 PARIS, FRANCE
SN 2118-9773
J9 EUR J TAXON
JI Eur. J. Taxon.
PD AUG 2
PY 2013
VL 51
BP 1
EP 64
DI 10.5852/ejt.2013.51
PG 64
WC Zoology
SC Zoology
GA 213EQ
UT WOS:000324037900001
ER
PT J
AU de Carvalho-Sobrinho, JG
de Queiroz, LP
Dorr, LJ
AF de Carvalho-Sobrinho, Jefferson G.
de Queiroz, Luciano P.
Dorr, Laurence J.
TI Does Pseudobombax have prickles? Assessing the enigmatic species
Pseudobombax endecaphyllum (Malvaceae: Bombacoideae)
SO TAXON
LA English
DT Editorial Material
DE Bombacaceae; Bombax; Jacaratia; Pachira; taxonomy; typification; Vellozo
AB In order to better understand the taxonomy of the enigmatic Pseudobombax endecaphyllum (Vell.) A.Robyns (Malvaceae: Bombacoideae), the only species in this genus thought to have aculeate branches, we reexamined the protologues of B. endecaphyllum and Pachira decaphylla A.St.-Hil. & Naudin, the latter a name long considered to be a synonym of the former, and discovered a great deal of taxonomic confusion. We conclude that B. endecaphyllum does not belong in Pseudobombax, Pachira decaphylla was based on a mixture of elements from two plant families, and the relationship between B. endecaphyllum and Pachira decaphylla is specious. It becomes evident that B. endecaphyllum is the earliest name available for Pachira stenopetala Casar. and the new combination Pachira endecaphylla (Vell.) Carv.-Sobr. is effected. An epitype is designated for B. endecaphyllum and a lectotype is designated for Pachira decaphylla, which becomes a synonym of Pseudobombax grandiflorum var. majus A. Robyns. Most importantly, we now consider that all species of Pseudo bombax are unarmed.
C1 [de Carvalho-Sobrinho, Jefferson G.; de Queiroz, Luciano P.] Univ Estadual Feira de Santana, Herbario HUEFS, BR-44036900 Feira De Santana, BA, Brazil.
[Dorr, Laurence J.] Smithsonian Inst, Dept Bot, Washington, DC 20013 USA.
RP de Carvalho-Sobrinho, JG (reprint author), Univ Estadual Feira de Santana, Herbario HUEFS, Ave Univ S-N, BR-44036900 Feira De Santana, BA, Brazil.
EM jef.sobrinho@gmail.com
RI Carvalho-Sobrinho, Jefferson/E-1480-2012; de Queiroz, Luciano
Paganucci/I-1378-2012
OI Carvalho-Sobrinho, Jefferson/0000-0003-3605-0707; de Queiroz, Luciano
Paganucci/0000-0001-7436-0939
NR 11
TC 1
Z9 1
U1 0
U2 3
PU INT ASSOC PLANT TAXONOMY-IAPT
PI BRATISLAVA
PA C/O INST BOTANY, SLOVAK ACAD SCIENCES DUBRAVSKA CESTA 9, SK-845 23
BRATISLAVA, SLOVAKIA
SN 0040-0262
EI 1996-8175
J9 TAXON
JI Taxon
PD AUG
PY 2013
VL 62
IS 4
BP 814
EP 818
PG 5
WC Plant Sciences; Evolutionary Biology
SC Plant Sciences; Evolutionary Biology
GA AG0RV
UT WOS:000335124200015
ER
PT J
AU Yotsu-Yamashita, M
Abe, Y
Kudo, Y
Ritson-Williams, R
Paul, VJ
Konoki, K
Cho, Y
Adachi, M
Imazu, T
Nishikawa, T
Isobe, M
AF Yotsu-Yamashita, Mari
Abe, Yuka
Kudo, Yuta
Ritson-Williams, Raphael
Paul, Valerie J.
Konoki, Keiichi
Cho, Yuko
Adachi, Masaatsu
Imazu, Takuya
Nishikawa, Toshio
Isobe, Minoru
TI First Identification of 5,11-Dideoxytetrodotoxin in Marine Animals, and
Characterization of Major Fragment Ions of Tetrodotoxin and Its Analogs
by High Resolution ESI-MS/MS
SO MARINE DRUGS
LA English
DT Article
DE tetrodotoxin; LC-MS/MS; 5,11-dideoxytetrodotoxin; biosynthesis
ID INTRAMUSCULARLY ADMINISTERED TETRODOTOXIN; PUFFER
AROTHRON-NIGROPUNCTATUS; IONIZATION MASS-SPECTROMETRY;
FUGU-POECILONOTUS; TAKIFUGU-RUBRIPES; TRANSFER PROFILE; STEREOCONTROLLED
SYNTHESIS; STRUCTURAL ASSIGNMENT; ATERGATIS-FLORIDUS; CYNOPS-ENSICAUDA
AB Even though tetrodotoxin (TTX) is a widespread toxin in marine and terrestrial organisms, very little is known about the biosynthetic pathway used to produce it. By describing chemical structures of natural analogs of TTX, we can start to identify some of the precursors that might be important for TTX biosynthesis. In the present study, an analog of TTX, 5,11-dideoxyTTX, was identified for the first time in natural sources, the ovary of the pufferfish and the pharynx of a flatworm (planocerid sp. 1), by comparison with totally synthesized (-)-5,11-dideoxyTTX, using high resolution ESI-LC-MS. Based on the presence of 5,11-dideoxyTTX together with a series of known deoxy analogs, 5,6, 11-trideoxyTTX, 6,11-dideoxyTTX, 11-deoxyTTX, and 5-deoxyTTX, in these animals, we predicted two routes of stepwise oxidation pathways in the late stages of biosynthesis of TTX. Furthermore, high resolution masses of the major fragment ions of TTX, 6,11-dideoxyTTX, and 5,6,11-trideoxyTTX were also measured, and their molecular formulas and structures were predicted to compare them with each other. Although both TTX and 5,6,11-trideoxyTTX give major fragment ions that are very close, m/z 162.0660 and 162.1020, respectively, they are distinguishable and predicted to be different molecular formulas. These data will be useful for identification of TTXs using high resolution LC-MS/MS.
C1 [Yotsu-Yamashita, Mari; Abe, Yuka; Kudo, Yuta; Konoki, Keiichi; Cho, Yuko] Tohoku Univ, Grad Sch Agr Sci, Sendai, Miyagi 9818555, Japan.
[Ritson-Williams, Raphael] Univ Hawaii Manoa, Dept Biol, Honolulu, HI 96822 USA.
[Paul, Valerie J.] Smithsonian Marine Stn Ft Pierce, Ft Pierce, FL 34949 USA.
[Adachi, Masaatsu; Imazu, Takuya; Nishikawa, Toshio] Nagoya Univ, Grad Sch Bioagr Sci, Chikusa Ku, Nagoya, Aichi 4648601, Japan.
[Isobe, Minoru] Natl Tsing Hua Univ, Dept Chem, Hsinchu 30013, Taiwan.
RP Yotsu-Yamashita, M (reprint author), Tohoku Univ, Grad Sch Agr Sci, Sendai, Miyagi 9818555, Japan.
EM myama@biochem.tohoku.ac.jp; y.abe.woodstock@gmail.com;
b3ad1305@s.tohoku.ac.jp; rrw33@hawaii.edu; Paul@si.edu;
konoki@m.tohoku.ac.jp; choyuko@m.tohoku.ac.jp;
madachi@agr.nagoya-u.ac.jp; imazu.takuya@b.mbox.nagoya-u.ac.jp;
nisikawa@agr.nagoya-u.ac.jp; minoru@mx.nthu.edu.tw
RI Konoki, Keiichi/O-9600-2014
FU Japan Society for the Promotion of Science (JSPS) [LS012]; JSPS
[25-5534]
FX This work was funded by the Japan Society for the Promotion of Science
(JSPS), through its Funding Program for the Next Generation
World-Leading Researchers (LS012) to M.Y.Y. Y.K. is grateful for
financial support from JSPS Predoctoral fellowships for Young Scientists
(no. 25-5534).
NR 50
TC 16
Z9 17
U1 1
U2 22
PU MDPI AG
PI BASEL
PA POSTFACH, CH-4005 BASEL, SWITZERLAND
SN 1660-3397
J9 MAR DRUGS
JI Mar. Drugs
PD AUG
PY 2013
VL 11
IS 8
BP 2799
EP 2813
DI 10.3390/md11082799
PG 15
WC Chemistry, Medicinal
SC Pharmacology & Pharmacy
GA 301GR
UT WOS:000330521300008
PM 23924959
ER
PT J
AU Hodgkison, R
Ayasse, M
Haberlein, C
Schulz, S
Zubaid, A
Mustapha, WAW
Kunz, TH
Kalko, EKV
AF Hodgkison, Robert
Ayasse, Manfred
Haeberlein, Christopher
Schulz, Stefan
Zubaid, Akbar
Mustapha, Wan Aida W.
Kunz, Thomas H.
Kalko, Elisabeth K. V.
TI Fruit bats and bat fruits: the evolution of fruit scent in relation to
the foraging behaviour of bats in the New and Old World tropics
SO FUNCTIONAL ECOLOGY
LA English
DT Article
DE chemical ecology; Chiroptera; co-evolution; foraging behaviour;
olfaction; Phyllostomidae; Pteropodidae; scent; seed dispersal
syndromes; terpenes
ID LOWLAND RAIN-FOREST; EATING BATS; CAROLLIA-PERSPICILLATA; MOLECULAR
PHYLOGENY; CHEMICAL ECOLOGY; DISPERSAL AGENTS; SEED DISPERSERS; FICUS
MORACEAE; FIGS; ECHOLOCATION
AB 1. Frugivory among bats (Chiroptera) has evolved independently in the New and Old World tropics: within the families Phyllostomidae and Pteropodidae, respectively. Bats from both families rely primarily on olfaction for the location of fruits. However, the influence of bats on the evolution of fruit scent is almost completely unknown.
2. Using the genus Ficus as a model, the aims of this study were to explore the chemical composition of fruit scent in relation to two contrasting seed dispersal syndromes in Panama and Malaysia and to assess the influence of fruit scent on the foraging behaviour of neo- and palaeotropical fruit-eating bats (Artibeus jamaicensis and Cynopterus brachyotis, respectively). Two hypotheses were tested: (i) variation in fruit scent, between bat-and bird-dispersed figs, is independent of phylogeny and (ii) Old and New World fruit bats, which have evolved independently in each hemisphere, share the same olfactory preferences with respect to fruit scent.
3. The fruit scents of bat-and bird-dispersed fig species were sampled in the field, using dynamic headspace adsorption techniques. New and Old World fruit bats were then captured and tested on natural fig fruit scents from both hemispheres.
4. Chemical analyses, using gas chromatography (GC) and GC/mass spectrometry (MS), revealed a broad overlap in scent compounds between bat-dispersed fig species from both hemispheres. Their fruit scents were dominated by monoterpenes, which contrary to phylogenetic predictions, were completely absent from bird-dispersed species from both regions.
5. The fruit scents of bat-dispersed figs were highly attractive to neotropical bats (A. jamaicensis) in behavioural experiments, whereas those of bird-dispersed figs were completely rejected. Neotropical bats (A. jamaicensis) exhibited a significant preference for fig fruit scents dominated by monoterpenes, independent of the geographical origin of the scent. Palaeotropical bats (C. brachyotis), by contrast, rejected monoterpene-rich fruit scents from the Neotropics.
6. In a cluster analysis (which included additional, published data from the literature), the fruit scents of bat-dispersed figs were clumped by subgenus, with the exception of palaeotropical figs of the subgenus Sycomorus. C. brachyotis, from Malaysia, was the only fruit bat species that significantly preferred the fruit scents of Sycomorus figs that contained no monoterpenes.
C1 [Hodgkison, Robert; Ayasse, Manfred; Kalko, Elisabeth K. V.] Univ Ulm, Inst Expt Ecol, D-89069 Ulm, Germany.
[Hodgkison, Robert; Kunz, Thomas H.] Boston Univ, Ctr Ecol & Conservat Biol, Boston, MA 02215 USA.
[Haeberlein, Christopher; Schulz, Stefan] Tech Univ Carolo Wilhelmina Braunschweig, Inst Organ Chem, Braunschweig, Germany.
[Zubaid, Akbar; Mustapha, Wan Aida W.] Univ Kebangsaan Malaysia, Pusat Pengajian Sains Sekitaran dan Sumber Alam, Bangi 43600, Malaysia.
[Kalko, Elisabeth K. V.] Smithsonian Trop Res Inst, Balboa, Panama.
RP Hodgkison, R (reprint author), Univ Ulm, Inst Expt Ecol, D-89069 Ulm, Germany.
EM rhodgkison@hotmail.com
FU Smithsonian Tropical Research Institute (Panama); Lubee Bat Conservancy;
Deutsche Forschungsgemeinschaft (DFG, Germany) [KA 124 8-1];
MOHE-UKMTOPDOWN [ST08FRGS00032010]; MOA [050102SF1041]
FX We thank the Smithsonian Tropical Research Institute (Panama) for their
support throughout this study and for extending their hospitality to
Sharon Balding and Felix Hodgkison. We also thank the Department of
Wildlife and National Parks (Malaysia) and the Economic Planning Unit of
the Prime Minister's Department (Malaysia) for granting us permission to
work in Malaysia. Finally, we gratefully acknowledge the valuable
contributions of the following individuals: Ahmad Bin Dagu, for field
assistance and logistical support in Malaysia; Sonja Gaessler, Larissa
Albrecht and Katrin Petschl, for field assistance on BCI; Allen Herre,
Adalberto Gomez, Nelida Gomez and Charlotte Jander, for sharing their
knowledge of figs on BCI; Konstans Wells, for sharing information on
small mammals in S. E. Asia; and Ingrid Dillon and Andrea Weiss, for
administrative support and laboratory assistance at Ulm University. This
research adhered to the Association of Animal Behaviour Guidelines for
the Use of Animals in Research as well as the Smithsonian Tropical
Research Institute's Protocol for the Humane Use of Live Vertebrates. We
gratefully acknowledge the valuable contributions of three anonymous
referees. The project was funded by a grant from the Lubee Bat
Conservancy to THK and RH and by funds from the Deutsche
Forschungsgemeinschaft (DFG, Germany) to EKVK and MA (KA 124 8-1). AZ
and WAWM were funded by MOHE-UKMTOPDOWN (Grant No. ST08FRGS00032010) and
MOA (Grant No. 050102SF1041).
NR 60
TC 11
Z9 11
U1 11
U2 63
PU WILEY-BLACKWELL
PI HOBOKEN
PA 111 RIVER ST, HOBOKEN 07030-5774, NJ USA
SN 0269-8463
EI 1365-2435
J9 FUNCT ECOL
JI Funct. Ecol.
PD AUG
PY 2013
VL 27
IS 4
SI SI
BP 1075
EP 1084
DI 10.1111/1365-2435.12101
PG 10
WC Ecology
SC Environmental Sciences & Ecology
GA 284GK
UT WOS:000329303900024
ER
PT J
AU Merot, C
Mavarez, J
Evin, A
Dasmahapatra, KK
Mallet, J
Lamas, G
Joron, M
AF Merot, Claire
Mavarez, Jesus
Evin, Allowen
Dasmahapatra, Kanchon K.
Mallet, James
Lamas, Gerardo
Joron, Mathieu
TI Genetic differentiation without mimicry shift in a pair of hybridizing
Heliconius species (Lepidoptera: Nymphalidae)
SO BIOLOGICAL JOURNAL OF THE LINNEAN SOCIETY
LA English
DT Article
DE geometric morphometrics; hybridization; multilocus genotype;
reproductive isolation; speciation; wing shape
ID POPULATION-STRUCTURE; MELPOMENE LINNAEUS; GENOMIC DIVERGENCE;
CLADISTIC-ANALYSIS; MULLERIAN MIMICRY; SEXUAL SELECTION; MATE
PREFERENCE; WARNING-COLOR; BUTTERFLIES; SPECIATION
AB Butterflies in the genus Heliconius have undergone rapid adaptive radiation for warning patterns and mimicry, and are excellent models to study the mechanisms underlying diversification. In Heliconius, mimicry rings typically involve distantly related species, whereas closely related species often join different mimicry rings. Genetic and behavioural studies have n how reproductive isolation in many pairs of Heliconius taxa is largely mediated by natural and sexual selection on wing colour patterns. However, recent studies have uncovered new cases in which pairs of closely related species are near-perfect mimics of each other. Here, we provide morphometric and genetic evidence for the coexistence of two closely related, hybridizing co-mimetic species on the eastern slopes of the Andes, H.melpomene amaryllis and H.timaretassp. nov., which is described here as H.timareta thelxinoe. A joint analysis of multilocus genotyping and geometric morphometrics of wing shape shows a high level of differentiation between the two species, with only limited gene flow and mixing. Some degree of genetic mixing can be detected, but putative hybrids were rare, only one of 175 specimens being a clear hybrid. In contrast, we found phenotypic differentiation between populations of H.timareta thelxinoe, possibly indicative of strong selection for local mimicry in different communities. In this pair of species, the absence of breakdown of genetic isolation despite near-identical wing patterns implies that factors other than wing patterns keep the two taxa apart, such as chemical or behavioural signals, or ecological adaptation along a strong altitudinal gradient.(c) 2013 The Linnean Society of London, Biological Journal of the Linnean Society, 2013, 109, 830-847.
C1 [Merot, Claire; Joron, Mathieu] Museum Natl Hist Nat, UMR CNRS 7205, F-75005 Paris, France.
[Mavarez, Jesus] Univ Grenoble 1, LECA, F-38041 Grenoble, France.
[Mavarez, Jesus] Smithsonian Trop Res Inst, Balboa, Panama.
[Evin, Allowen] Univ Aberdeen, Dept Archaeol, Aberdeen AB24 3UF, Scotland.
[Evin, Allowen] Museum Natl Hist Nat, UMR CNRS 7209, F-75005 Paris, France.
[Dasmahapatra, Kanchon K.] Univ York, Dept Biol, York YO10 5DD, N Yorkshire, England.
[Dasmahapatra, Kanchon K.; Mallet, James] UCL, Dept Genet Evolut & Environm, London WC1E 6BT, England.
[Mallet, James] Harvard Univ, Dept Organism & Evolutionary Biol, Cambridge, MA 02138 USA.
[Lamas, Gerardo] Univ Nacl Mayor San Marcos, Museo Hist Nat, Lima 14, Peru.
RP Joron, M (reprint author), Museum Natl Hist Nat, UMR CNRS 7205, 45 Rue Buffon, F-75005 Paris, France.
EM joron@mnhn.fr
RI mallet, james/B-5114-2008;
OI EVIN, Allowen/0000-0003-4515-1649; Lamas, Gerardo/0000-0002-3664-6730
FU URKU Estudios Amazonicos; CNRS ATIP grant; ERC
FX We thank Benigno Calderon, Nicolas Chazot, Jae-Woo Chung, Mathieu
Chouteau, Stephanie Galluser, Melanie McClure, Owen McMillan, Jerome
Murienne, Ronald Mori Pezo, Joel Pintado, Lisa de Silva, Armando Silva
Vasquez, Fraser Simpson, Cesar Ramirez and Neil Rosser for their help at
various stages of fieldwork, and URKU Estudios Amazonicos for their
support in Tarapoto. We thank the Ministerio de la Agricultura
(ex-INRENA), the SERNANP-Bosque de Proteccion Alto Mayo and PEHCBM-Area
de Conservacion Regional Cordillera Escalera for collection and export
permits. We are very grateful to Chris Jiggins, Richard Merrill and
Blanca Huertas for access to specimens and wings, Michel Baylac for the
latest version of Rmorph and Neil Rosser for maps. We thank Marianne
Elias and three anonymous reviewers for constructive and helpful
comments on the manuscript. Molecular work was carried out at the
Service de Systematique Moleculaire du Museum National d'Histoire
Naturelle (CNRS - UMS 2700) and at the BoEM laboratory. This work was
supported by a CNRS ATIP grant and an ERC Starting Grant (MimEvol) to
MJ.
NR 79
TC 16
Z9 16
U1 2
U2 34
PU WILEY-BLACKWELL
PI HOBOKEN
PA 111 RIVER ST, HOBOKEN 07030-5774, NJ USA
SN 0024-4066
EI 1095-8312
J9 BIOL J LINN SOC
JI Biol. J. Linnean Soc.
PD AUG
PY 2013
VL 109
IS 4
BP 830
EP 847
DI 10.1111/bij.12091
PG 18
WC Evolutionary Biology
SC Evolutionary Biology
GA 279JR
UT WOS:000328956800008
ER
PT J
AU Fares, S
Vargas, R
Detto, M
Goldstein, AH
Karlik, J
Paoletti, E
Vitale, M
AF Fares, Silvano
Vargas, Rodrigo
Detto, Matteo
Goldstein, Allen H.
Karlik, John
Paoletti, Elena
Vitale, Marcello
TI Tropospheric ozone reduces carbon assimilation in trees: estimates from
analysis of continuous flux measurements
SO GLOBAL CHANGE BIOLOGY
LA English
DT Article
DE citrus; gross primary productivity; Mediterranean forest; ozone
concentration; ozone damage; Pinus ponderosa; stomatal deposition
ID OPEN-TOP CHAMBERS; STOMATAL CONDUCTANCE; MULTISCALE ANALYSIS;
SIERRA-NEVADA; NORWAY SPRUCE; WATER-STRESS; FOREST TREES; EXPOSURE; CO2;
PHOTOSYNTHESIS
AB High ground-level ozone concentrations are typical of Mediterranean climates. Plant exposure to this oxidant is known to reduce carbon assimilation. Ozone damage has been traditionally measured through manipulative experiments that do not consider long-term exposure and propagate large uncertainty by up-scaling leaf-level observations to ecosystem-level interpretations. We analyzed long-term continuous measurements (>9 site-years at 30min resolution) of environmental and eco-physiological parameters at three Mediterranean ecosystems: (i) forest site dominated by Pinus ponderosa in the Sierra Mountains in California, USA; (ii) forest site composed of a mixture of Quercus spp. and P. pinea in the Tyrrhenian sea coast near Rome, Italy; and (iii) orchard site of Citrus sinensis cultivated in the California Central Valley, USA. We hypothesized that higher levels of ozone concentration in the atmosphere result in a decrease in carbon assimilation by trees under field conditions. This hypothesis was tested using time series analysis such as wavelet coherence and spectral Granger causality, and complemented with multivariate linear and nonlinear statistical analyses. We found that reduction in carbon assimilation was more related to stomatal ozone deposition than to ozone concentration. The negative effects of ozone occurred within a day of exposure/uptake. Decoupling between carbon assimilation and stomatal aperture increased with the amount of ozone pollution. Up to 12-19% of the carbon assimilation reduction in P. ponderosa and in the Citrus plantation was explained by higher stomatal ozone deposition. In contrast, the Italian site did not show reductions in gross primary productivity either by ozone concentration or stomatal ozone deposition, mainly due to the lower ozone concentrations in the periurban site over the shorter period of investigation. These results highlight the importance of plant adaptation/sensitivity under field conditions, and the importance of continuous long-term measurements to explain ozone damage to real-world forests and calculate metrics for ozone-risk assessment.
C1 [Fares, Silvano] Res Ctr Soil Plant Syst, Consiglio Ric & Sperimentaz Agr CRA, I-00184 Rome, Italy.
[Vargas, Rodrigo] Univ Delaware, Delaware Environm Inst, Dept Plant & Soil Sci, Newark, DE 19716 USA.
[Detto, Matteo] Smithsonian Trop Res Inst, Dpo, AA 34002 USA.
[Goldstein, Allen H.] Univ Calif Berkeley, Dept Environm Sci Policy & Management, Berkeley, CA 94720 USA.
[Paoletti, Elena] Inst Plant Protect, Natl Res Council, I-50019 Florence, Italy.
[Vitale, Marcello] Univ Roma La Sapienza, Dept Environm Biol, I-00185 Rome, Italy.
RP Fares, S (reprint author), Res Ctr Soil Plant Syst, Consiglio Ric & Sperimentaz Agr CRA, Via Navicella 2-4, I-00184 Rome, Italy.
EM silvano.fares@entecra.it
RI Goldstein, Allen/A-6857-2011; Fares, Silvano/H-4322-2011; Paoletti,
Elena/B-8974-2009; Vargas, Rodrigo/C-4720-2008;
OI Goldstein, Allen/0000-0003-4014-4896; Fares,
Silvano/0000-0002-1990-0928; Paoletti, Elena/0000-0001-5324-7769;
Vargas, Rodrigo/0000-0001-6829-5333; Vitale,
Marcello/0000-0002-3652-7029
FU Kearney Foundation of Soil Science; University of California
Agricultural Experiment Station; Office of Science, Biological and
Environmental Research Program (BER), U.S. Department of Energy, through
the Western Regional Center of the National Institute for Global
Environmental Change (NIGEC) [DEFCO2-03ER63613]; Citrus Research Board;
California Air Resources Board; European Commission
FX The research in Blodgett was made possible by grants from the Kearney
Foundation of Soil Science, the University of California Agricultural
Experiment Station and the Office of Science, Biological and
Environmental Research Program (BER), U.S. Department of Energy, through
the Western Regional Center of the National Institute for Global
Environmental Change (NIGEC) under Cooperative Agreement No.
DEFCO2-03ER63613. We gratefully acknowledge Dr. Megan McKay for helping
to collect the data.; The research in Lindcove was made possible by
grants from the Citrus Research Board, the California Air Resources
Board, and by the European Commission Marie Curie IOF 2008 project
CITROVOC. We gratefully acknowledge Dr. Robin Weber for helping to
collect the data.
NR 56
TC 35
Z9 35
U1 3
U2 62
PU WILEY-BLACKWELL
PI HOBOKEN
PA 111 RIVER ST, HOBOKEN 07030-5774, NJ USA
SN 1354-1013
EI 1365-2486
J9 GLOBAL CHANGE BIOL
JI Glob. Change Biol.
PD AUG
PY 2013
VL 19
IS 8
BP 2427
EP 2443
DI 10.1111/gcb.12222
PG 17
WC Biodiversity Conservation; Ecology; Environmental Sciences
SC Biodiversity & Conservation; Environmental Sciences & Ecology
GA 276IV
UT WOS:000328744900011
PM 23589473
ER
PT J
AU Tait, KT
Hawthorne, FC
Wise, MA
AF Tait, Kimberly T.
Hawthorne, Frank C.
Wise, Michael A.
TI THE CRYSTAL CHEMISTRY OF THE GRAFTONITE-BEUSITE MINERALS
SO CANADIAN MINERALOGIST
LA English
DT Article
DE Graftonite; beusite; crystal-structure refinement; electron-microprobe
data
ID YELLOWKNIFE PEGMATITE FIELD; GRANITIC PEGMATITE; NORTHWEST-TERRITORIES;
PHOSPHATE MINERALS; SITE POPULATIONS; IRON-METEORITES; SOLID-SOLUTIONS;
TRIPHYLITE; INTERGROWTHS; ASSOCIATIONS
AB The crystal structures of seven members of the graftonite-beusite series, ideally (Fe2+,Mn2+,Ca)(3)(PO4)(2), monoclinic P2(1)/c, a 8.77-8.81, b 11.43-11.58, c 6.13-6.17 angstrom, beta 99.19-99.32 degrees, V 607.5-617.7 angstrom(3), have been refined to R-1 indices of 2.1-3.7% using similar to 1300-1600 unique observed reflections (vertical bar F-o vertical bar > 5 sigma F) collected using a single-crystal diffractometer equipped with MoK alpha X-radiation. The crystals used in the collection of the X-ray data were subsequently analyzed with an electron microprobe and the structural and microprobe results were used to assign site populations. The refined site-scattering values and linear variation in mean bond-length as a function of aggregate-cation radius indicate that Ca is completely ordered at the M(1) site. Similarly, Mn is ordered at the M(1) and M(3) sites, with any excess Mn occurring at M(2), and Mg is completely ordered at M(2). Detailed consideration of incident bond-valence sums at the three M sites indicates that the coordination numbers of the M(1), M(2), and M(3) sites are [8], [5], and [6], respectively, although the differences between these and [7], [5], and [5] are very small. Ca is dominant at the M(1) site in a previously refined beusite structure, and there are compositions reported here and elsewhere in which Ca is dominant at M(1) in graftonite-like compositions, indicating the potential for new mineral species in this group.
C1 [Tait, Kimberly T.; Hawthorne, Frank C.] Univ Manitoba, Dept Geol Sci, Winnipeg, MB R3T 2N2, Canada.
[Wise, Michael A.] Smithsonian Inst, Dept Mineral Sci, Washington, DC 20560 USA.
RP Hawthorne, FC (reprint author), Univ Manitoba, Dept Geol Sci, Winnipeg, MB R3T 2N2, Canada.
EM frank_hawthome@umanitoba.ca
RI Hawthorne, Frank/F-6864-2011
OI Hawthorne, Frank/0000-0001-6405-9931
FU Canada Research Chair in Crystallography and Mineralogy; Natural
Sciences and Engineering Research Council of Canada (NSERC); NSERC
FX We thank John Hughes and an anonymous reviewer for their comments on
this paper. This work was supported by a Canada Research Chair in
Crystallography and Mineralogy, and Research Tools and Equipment, Major
Facilities Access and Discovery Grants from the Natural Sciences and
Engineering Research Council of Canada (NSERC) to FCH, and an NSERC
Discovery Grant to KTT.
NR 33
TC 2
Z9 2
U1 0
U2 4
PU MINERALOGICAL ASSOC CANADA
PI QUEBEC
PA 490, RUE DE LA COURONNE, QUEBEC, QC G1K 9A9, CANADA
SN 0008-4476
EI 1499-1276
J9 CAN MINERAL
JI Can. Mineral.
PD AUG
PY 2013
VL 51
IS 4
BP 653
EP 662
DI 10.3749/canmin.51.4.653
PG 10
WC Mineralogy
SC Mineralogy
GA 266GA
UT WOS:000328010200009
ER
PT J
AU Launius, RD
AF Launius, Roger D.
TI Pursuit of Power: NASA's Propulsion Systems Laboratory No. 1 and 2
SO PUBLIC HISTORIAN
LA English
DT Book Review
C1 [Launius, Roger D.] Smithsonian Inst, Natl Air & Space Museum, Washington, DC 20560 USA.
RP Launius, RD (reprint author), Smithsonian Inst, Natl Air & Space Museum, Washington, DC 20560 USA.
NR 1
TC 0
Z9 0
U1 0
U2 0
PU UNIV CALIFORNIA PRESS
PI BERKELEY
PA C/O JOURNALS & DIGITAL PUBLISHING DIVISION, 2000 CENTER ST, STE 303,
BERKELEY, CA 94704-1223 USA
SN 0272-3433
J9 PUBL HISTORIAN
JI Public Hist.
PD AUG
PY 2013
VL 35
IS 3
BP 112
EP 113
PG 2
WC History
SC History
GA 243JN
UT WOS:000326312800012
ER
PT J
AU Errmann, R
Neuhauser, R
Marschall, L
Torres, G
Mugrauer, M
Chen, WP
Hu, SCL
Briceno, C
Chini, R
Bukowiecki, L
Dimitrov, DP
Kjurkchieva, D
Jensen, ELN
Cohen, DH
Wu, ZY
Pribulla, T
Vanko, M
Krushevska, V
Budaj, J
Oasa, Y
Pandey, AK
Fernandez, M
Kellerer, A
Marka, C
AF Errmann, R.
Neuhaeuser, R.
Marschall, L.
Torres, G.
Mugrauer, M.
Chen, W. P.
Hu, S. C. -L.
Briceno, C.
Chini, R.
Bukowiecki, L.
Dimitrov, D. P.
Kjurkchieva, D.
Jensen, E. L. N.
Cohen, D. H.
Wu, Z. -Y.
Pribulla, T.
Vanko, M.
Krushevska, V.
Budaj, J.
Oasa, Y.
Pandey, A. K.
Fernandez, M.
Kellerer, A.
Marka, C.
TI The stellar content of the young open cluster Trumpler 37
SO ASTRONOMISCHE NACHRICHTEN
LA English
DT Article
DE open clusters and associations: individual (Trumpler 37)
ID INTERMEDIATE-MASS STARS; SOLAR-TYPE STARS; CEPHEUS OB2; RESOLUTION
SPECTROSCOPY; DISK EVOLUTION; TAURUS-AURIGA; ACCRETION; VARIABILITY;
EMISSION
AB With an apparent cluster diameter of 1.5 degrees and an age of 4 Myr, Trumpler 37 is an ideal target for photometric monitoring of young stars as well as for the search of planetary transits, eclipsing binaries and other sources of variability. The YETI consortium has monitored Trumpler 37 throughout 2010 and 2011 to obtain a comprehensive view of variable phenomena in this region. In this first paper we present the cluster properties and membership determination as derived from an extensive investigation of the literature. We also compared the coordinate list to some YETI images. For 1872 stars we found literature data. Among them 774 have high probability of being member and 125 a medium probability. Based on infrared data we re-calculate a cluster extinction of 0.9-1.2 mag. We can confirm the age and distance to be 3-5 Myr and870 pc. Stellar masses are determined from theoretical models and the mass function is fitted with a power-law index of = 1.90 (0.1-0.4 M) and = 1.12 (1-10 M). ((c) 2013 WILEY-VCH Verlag GmbH & Co. KGaA, Weinheim)
C1 [Errmann, R.; Neuhaeuser, R.; Mugrauer, M.; Marka, C.] Inst Astrophys, D-07745 Jena, Germany.
[Errmann, R.; Neuhaeuser, R.; Mugrauer, M.; Marka, C.] Univ Sternwarte Jena, D-07745 Jena, Germany.
[Marschall, L.] Gettysburg Coll Observ, Dept Phys, Gettysburg, PA 17325 USA.
[Torres, G.] Harvard Smithsonian Ctr Astrophys, Cambridge, MA 02138 USA.
[Chen, W. P.; Hu, S. C. -L.] Natl Cent Univ, Grad Inst Astron, Jhongli 32001, Taoyuan County, Taiwan.
[Hu, S. C. -L.] Taipei Astron Museum, Taipei 11160, Taiwan.
[Briceno, C.] Ctr Invest Astron, Merida 5101, Venezuela.
[Chini, R.] Ruhr Univ Bochum, Astronom Inst, D-44801 Bochum, Germany.
[Chini, R.] Univ Catolica Norte, Inst Astronom, Antofagasta, Chile.
[Bukowiecki, L.] Nicholas Copernicus Univ, Torun Ctr Astron, PL-87100 Torun, Poland.
[Dimitrov, D. P.] Bulg Acad Sci, Inst Astron, Sofia 1784, Bulgaria.
[Dimitrov, D. P.] Bulg Acad Sci, NAO, Sofia 1784, Bulgaria.
[Kjurkchieva, D.] Univ Shumen, Shumen 9700, Bulgaria.
[Jensen, E. L. N.; Cohen, D. H.] Swarthmore Coll, Dept Phys & Astron, Swarthmore, PA 19081 USA.
[Wu, Z. -Y.] Chinese Acad Sci, NAO, Key Lab Opt Astron, Beijing 100012, Peoples R China.
[Pribulla, T.; Vanko, M.; Budaj, J.] Slovak Acad Sci, Astron Inst, Tatranska Lomnica, Slovakia.
[Krushevska, V.] Natl Acad Sci Ukraine, Main Astron Observ, UA-03680 Kiev, Ukraine.
[Oasa, Y.] Saitama Univ, Dept Astron & Earth Sci, Sakura, Saitama 3388570, Japan.
[Pandey, A. K.] Aryabhatta Res Inst Observat Sci, Naini Tal 263129, Uttarakhand, India.
[Fernandez, M.] CSIC, Inst Astrofis Andalucia, E-18080 Granada, Spain.
[Kellerer, A.] Univ Durham, Dept Phys, Durham DH1 3LE, England.
RP Errmann, R (reprint author), Inst Astrophys, Schillergasschen 2-3, D-07745 Jena, Germany.
EM ronny.errmann@uni-jena.de
RI Dimitrov, Dinko/J-7682-2013;
OI Jensen, Eric/0000-0002-4625-7333
FU National Aeronautics and Space Administration; National Science
Foundation; DFG [SPP 1385, NE 515 / 34-1, MU2695/13-1]; Abbe-School of
Photonics; Thuringian government [B 515-07010]; Bulgarian Scientific
Foundation [DO 02-85, DDVU 02/40-2010]; National Science Foundation's
PREST program [AST-0721386]; [APVV-0158-11]; [2/0094/11]
FX This publication makes use of data products from the Two Micron All Sky
Survey, which is a joint project of the University of Massachusetts and
the Infrared Processing and Analysis Center/California Institute of
Technology, funded by the National Aeronautics and Space Administration
and the National Science Foundation. This research has made use of the
WEBDA database, operated at the Institute for Astronomy of the
University of Vienna. This research has made use of the VizieR catalog
access tool, CDS, Strasbourg, France.; RN and RE would like to thank DFG
for support in the Priority Programme SPP 1385 on the "First Ten Million
Years of the Solar System" in project NE 515 / 34-1. RE also thanks the
Abbe-School of Photonics for support. We would like to acknowledge
financial support from the Thuringian government (B 515-07010) for the
STK CCD camera used in this project. TP, MV and JB thank for the support
to the projects APVV-0158-11 and VEGA 2/0094/11. MM acknowledges DFG for
support in program MU2695/13-1. The research was supported partly by
funds of projects DO 02-85 and DDVU 02/40-2010 of the Bulgarian
Scientific Foundation. E.L.N.J. and D. H. C. gratefully acknowledge the
support of the National Science Foundation's PREST program, which helped
to establish the Peter van de Kamp Observatory through grant
AST-0721386, and of the Provost's Office of Swarthmore College for their
support maintaining and operating the observatory.
NR 33
TC 4
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U1 0
U2 4
PU WILEY-V C H VERLAG GMBH
PI WEINHEIM
PA BOSCHSTRASSE 12, D-69469 WEINHEIM, GERMANY
SN 0004-6337
EI 1521-3994
J9 ASTRON NACHR
JI Astro. Nachr.
PD AUG
PY 2013
VL 334
IS 7
BP 673
EP 681
DI 10.1002/asna.201311890
PG 9
WC Astronomy & Astrophysics
SC Astronomy & Astrophysics
GA 237IS
UT WOS:000325863500009
ER
PT J
AU Kita, NT
Yin, QZ
MacPherson, GJ
Ushikubo, T
Jacobsen, B
Nagashima, K
Kurahashi, E
Krot, AN
Jacobsen, SB
AF Kita, Noriko T.
Yin, Qing-Zhu
MacPherson, Glenn J.
Ushikubo, Takayuki
Jacobsen, Benjamin
Nagashima, Kazuhide
Kurahashi, Erika
Krot, Alexander N.
Jacobsen, Stein B.
TI 26Al-26Mg isotope systematics of the first solids in the early solar
system
SO METEORITICS & PLANETARY SCIENCE
LA English
DT Article
ID ALUMINUM-RICH INCLUSIONS; REFRACTORY INCLUSIONS; CARBONACEOUS-CHONDRITE;
AL-26-MG-26 SYSTEMATICS; INITIAL AL-26/AL-27; HETEROGENEOUS
DISTRIBUTION; CONTEMPORANEOUS FORMATION; CA,AL-RICH INCLUSIONS;
PROTOPLANETARY DISKS; ALLENDE METEORITE
AB High-precision bulk aluminum-magnesium isotope measurements of calcium-aluminum-rich inclusions (CAIs) from CV carbonaceous chondrites in several laboratories define a bulk 26Al-26Mg isochron with an inferred initial 26Al/27Al ratio of approximately 5.25x10-5, named the canonical ratio. Nonigneous CV CAIs yield well-defined internal 26Al-26Mg isochrons consistent with the canonical value. These observations indicate that the canonical 26Al/27Al ratio records initial Al/Mg fractionation by evaporation and condensation in the CV CAI-forming region. The internal isochrons of igneous CV CAIs show a range of inferred initial 26Al/27Al ratios, (4.2-5.2)x10-5, indicating that CAI melting continued for at least 0.2Ma after formation of their precursors. A similar range of initial 26Al/27Al ratios is also obtained from the internal isochrons of many CAIs (igneous and nonigneous) in other groups of carbonaceous chondrites. Some CAIs and refractory grains (corundum and hibonite) from unmetamorphosed or weakly metamorphosed chondrites, including CVs, are significantly depleted in 26Al. At least some of these refractory objects may have formed prior to injection of 26Al into the protosolar molecular cloud and its subsequent homogenization in the protoplanetary disk. Bulk aluminum and magnesium-isotope measurements of various types of chondrites plot along the bulk CV CAI isochron, suggesting homogeneous distribution of 26Al and magnesium isotopes in the protoplanetary disk after an epoch of CAI formation. The inferred initial 26Al/27Al ratios of chondrules indicate that most chondrules formed 1-3Ma after CAIs with the canonical 26Al/27Al ratio.
C1 [Kita, Noriko T.; Ushikubo, Takayuki] Univ Wisconsin, Dept Geosci, WiscSIMS, Madison, WI 53706 USA.
[MacPherson, Glenn J.] Smithsonian Inst, US Natl Museum Nat Hist, Dept Mineral Sci, Washington, DC 20560 USA.
[Jacobsen, Benjamin] Lawrence Livermore Natl Lab, Livermore, CA 94551 USA.
[Nagashima, Kazuhide; Krot, Alexander N.] Univ Hawaii Manoa, Sch Ocean Earth Sci & Technol, Hawaii Inst Geophys & Planetol, Honolulu, HI 96822 USA.
[Kurahashi, Erika] Univ Munster, Inst Mineral, D-48149 Munster, Germany.
[Jacobsen, Stein B.] Harvard Univ, Dept Earth & Planetary Sci, Cambridge, MA 02138 USA.
RP Kita, NT (reprint author), Univ Wisconsin, Dept Geosci, WiscSIMS, Madison, WI 53706 USA.
EM noriko@geology.wisc.edu
RI Yin, Qing-Zhu/B-8198-2009; Kita, Noriko/H-8035-2016
OI Yin, Qing-Zhu/0000-0002-4445-5096; Kita, Noriko/0000-0002-0204-0765
FU NASA [NNX09AB88G, NNX11AJ51G, NNX11AD43G, NNX11 AK82G, NNX10AH76G]; UC
Laboratory Fees Research Program [12_LR-237921]
FX The authors acknowledge the organizing committee of the Workshop on
"Formation of the First Solid in the Solar System" for the opportunity
of this article. The constructive comments by Joel Baker and James
Connelly and the careful handling by associate editor Edward Scott
improved clarity of the manuscript significantly. This work is supported
by NASA programs (NNX09AB88G, NK; NNX11AJ51G, QZY; NNX11AD43G, GJM;
NNX11 AK82G, SBJ; NNX10AH76G, ANK) and UC Laboratory Fees Research
Program 12_LR-237921 to QZY.
NR 99
TC 40
Z9 40
U1 1
U2 28
PU WILEY-BLACKWELL
PI HOBOKEN
PA 111 RIVER ST, HOBOKEN 07030-5774, NJ USA
SN 1086-9379
EI 1945-5100
J9 METEORIT PLANET SCI
JI Meteorit. Planet. Sci.
PD AUG
PY 2013
VL 48
IS 8
BP 1383
EP 1400
DI 10.1111/maps.12141
PG 18
WC Geochemistry & Geophysics
SC Geochemistry & Geophysics
GA 237KC
UT WOS:000325867500002
ER
PT J
AU Bullock, ES
Knight, KB
Richter, FM
Kita, NT
Ushikubo, T
MacPherson, GJ
Davis, AM
Mendybaev, RA
AF Bullock, Emma S.
Knight, Kim B.
Richter, Frank M.
Kita, Noriko T.
Ushikubo, Takayuki
MacPherson, Glenn J.
Davis, Andrew M.
Mendybaev, Ruslan A.
TI Mg and Si isotopic fractionation patterns in types B1 and B2 CAIs:
Implications for formation under different nebular conditions
SO METEORITICS & PLANETARY SCIENCE
LA English
DT Article
ID AL-RICH INCLUSIONS; REFRACTORY INCLUSIONS; CRYSTALLIZATION SEQUENCES;
ALLENDE METEORITE; MELILITE; CONDENSATION; EVAPORATION; LIQUIDS;
CHONDRITES; EVOLUTION
AB Magnesium and silicon isotopic profiles across melilite grains in two type B1 and two type B2 calcium-aluminum-rich inclusions (CAIs) reveal differing but constant enrichments in heavy isotopes everywhere except 1000m from the CAI margins. There is no close correlation in the B1s or the B2s between isotopic composition and akermanite content of the melilite, a measure of progressive igneous crystallization, yet such a correlation might be expected in a type B2: without a melilite mantle (as in B1s) to seal the interior off and prevent further evaporation, the melt would have maintained communication with the external gas. These observations indicate a model in which B1s and B2s solidified under differing conditions. The B2s solidified under lower hydrogen pressures (PH210-4-10-5 bars) than did B1s (PH2>10-4 bars), so surface volatilization was slower in the B2s and internal chemical and isotopic equilibrium was maintained over the interval of melilite crystallization. The outermost zones of the CAIs (1000m from the edge) are not consistently enriched in heavy isotopes relative to the interiors, as might be expected from diffusion-limited surface evaporation of the melt. In all cases, the magnesium in the CAI margins is lighter than in the interiors. In one case, silicon in the margin also is lighter, but locally in some CAIs, it is isotopically heavier near the surface. If melt evaporation played a role in the formation of these outer zones, a later event in many cases caused isotopic re-equilibration with an external and isotopically near-normal reservoir.
C1 [Bullock, Emma S.; MacPherson, Glenn J.] Smithsonian Inst, US Natl Museum Nat Hist, Washington, DC 20560 USA.
[Knight, Kim B.] Lawrence Livermore Natl Lab, Livermore, CA 94550 USA.
[Richter, Frank M.; Davis, Andrew M.; Mendybaev, Ruslan A.] Univ Chicago, Dept Geophys Sci, Chicago, IL 60637 USA.
[Kita, Noriko T.; Ushikubo, Takayuki] Univ Wisconsin, Dept Geosci, Madison, WI 53706 USA.
[Davis, Andrew M.] Univ Chicago, Enrico Fermi Inst, Chicago, IL 60637 USA.
RP Bullock, ES (reprint author), Smithsonian Inst, US Natl Museum Nat Hist, Washington, DC 20560 USA.
EM bullockE@si.edu
RI Kita, Noriko/H-8035-2016;
OI Kita, Noriko/0000-0002-0204-0765; Davis, Andrew/0000-0001-7955-6236
FU NASA [NNX09AG39G, NNX09AB88G, NNX11AD43G, NNX09AG38G]; NSF [EAR03-19230,
EAR07-44079]
FX The manuscript was greatly improved by careful and thoughtful reviews by
Drs. Christine Floss (Assoc. Ed.), Yunbin Guan, Julie Paque, and Steve
Simon. This work was supported by NASA grants NNX09AG39G (A. M. D., PI),
NNX09AB88G (N. K., PI), NNX11AD43G (G. J. M., PI), and NNX09AG38G (F.
R., PI). WiscSIMS is partly supported by NSF (EAR03-19230, EAR07-44079).
NR 34
TC 7
Z9 7
U1 2
U2 15
PU WILEY-BLACKWELL
PI HOBOKEN
PA 111 RIVER ST, HOBOKEN 07030-5774, NJ USA
SN 1086-9379
EI 1945-5100
J9 METEORIT PLANET SCI
JI Meteorit. Planet. Sci.
PD AUG
PY 2013
VL 48
IS 8
BP 1440
EP 1458
DI 10.1111/maps.12158
PG 19
WC Geochemistry & Geophysics
SC Geochemistry & Geophysics
GA 237KC
UT WOS:000325867500006
ER
PT J
AU MacPherson, GJ
Andronicos, CL
Bindi, L
Distler, VV
Eddy, MP
Eiler, JM
Guan, YB
Hollister, LS
Kostin, A
Kryachko, V
Steinhardt, WM
Yudovskaya, M
Steinhardt, PJ
AF MacPherson, Glenn J.
Andronicos, Christopher L.
Bindi, Luca
Distler, Vadim V.
Eddy, Michael P.
Eiler, John M.
Guan, Yunbin
Hollister, Lincoln S.
Kostin, Alexander
Kryachko, Valery
Steinhardt, William M.
Yudovskaya, Marina
Steinhardt, Paul J.
TI Khatyrka, a new CV3 find from the Koryak Mountains, Eastern Russia
SO METEORITICS & PLANETARY SCIENCE
LA English
DT Article
ID NATURAL QUASI-CRYSTAL; CHONDRITES; ORIGIN
AB A new meteorite find, named Khatyrka, was recovered from eastern Siberia as a result of a search for naturally occurring quasicrystals. The meteorite occurs as clastic grains within postglacial clay-rich layers along the banks of a small stream in the Koryak Mountains, Chukotka Autonomous Okrug of far eastern Russia. Some of the grains are clearly chondritic and contain Type IA porphyritic olivine chondrules enclosed in matrices that have the characteristic platy olivine texture, matrix olivine composition, and mineralogy (olivine, pentlandite, nickel-rich iron-nickel metal, nepheline, and calcic pyroxene [diopside-hedenbergite solid solution]) of oxidized-subgroup CV3 chondrites. A few grains are fine-grained spinel-rich calcium-aluminum-rich inclusions with mineral oxygen isotopic compositions again typical of such objects in CV3 chondrites. The chondritic and CAI grains contain small fragments of metallic copper-aluminum-iron alloys that include the quasicrystalline phase icosahedrite. One grain is an achondritic intergrowth of Cu-Al metal alloys and forsteritic olivine +/- diopsidic pyroxene, both of which have meteoritic (CV3-like) oxygen isotopic compositions. Finally, some grains consist almost entirely of metallic alloys of aluminum+copper +/- iron. The Cu-Al-Fe metal alloys and the alloy-bearing achondrite clast are interpreted to be an accretionary component of what otherwise is a fairly normal CV3 (oxidized) chondrite. This association of CV3 chondritic grains with metallic copper-aluminum alloys makes Khatyrka a unique meteorite, perhaps best described as a complex CV3 (ox) breccia.
C1 [MacPherson, Glenn J.] Smithsonian Inst, Natl Museum Nat Hist, Dept Mineral Sci, Washington, DC 20560 USA.
[Andronicos, Christopher L.] Purdue Univ, Dept Earth & Atmospher Sci, W Lafayette, IN 47907 USA.
[Bindi, Luca] Univ Florence, Dipartimento Sci Terra, I-50121 Florence, Italy.
[Distler, Vadim V.; Kryachko, Valery; Yudovskaya, Marina] Russian Acad Sci, Inst Geol Ore Deposits, Moscow 119017, Russia.
[Eddy, Michael P.] MIT, Dept Earth Atmospher & Planetary Sci, Cambridge, MA 02139 USA.
[Eiler, John M.; Guan, Yunbin] CALTECH, Div Geol & Planetary Sci, Pasadena, CA 91125 USA.
[Hollister, Lincoln S.] Princeton Univ, Dept Geosci, Princeton, NJ 08544 USA.
[Kostin, Alexander] BHP Billiton, Geosci Technol, Houston, TX 77056 USA.
[Steinhardt, William M.] Harvard Univ, Dept Earth & Planetary Sci, Cambridge, MA 02138 USA.
[Steinhardt, Paul J.] Princeton Univ, Dept Phys, Princeton, NJ 08544 USA.
[Steinhardt, Paul J.] Princeton Univ, Princeton Ctr Theoret Sci, Princeton, NJ 08544 USA.
RP MacPherson, GJ (reprint author), Smithsonian Inst, Natl Museum Nat Hist, Dept Mineral Sci, Washington, DC 20560 USA.
EM macphers@si.edu
RI Yudovskaya, Marina/K-3980-2013
FU NSF MRSEC program through New York University [DMR-0820341]; MIUR; Dept.
of Mineral Sciences
FX The expedition to Chukotka was supported by a grant from an anonymous
donor to Princeton University (PJS, Principal Investigator). The
research was supported, in part, by the NSF MRSEC program through New
York University (grant DMR-0820341; PJS); the MIUR, PRIN 2009 project
"Modularity, microstructures and non-stoichiometry in minerals" (LB);
and the Chairman's Discretionary Fund, Dept. of Mineral Sciences, SI
(GJM). We have benefitted from comments and many contributions to
detailed imaging studies of the samples by N. Yao. The expedition was
enabled by a co-operative agreement between Princeton University and the
Institute of Geology of Ore Deposits, Mineralogy, Petrography and
Geochemistry (IGEM) of the Russian Academy of Science (RAS). The
expedition also hugely benefitted from the logistical aid provided by
Olga Komelkova, Victor Komelkov, and Bogdan Makovskii, all from Anadyr,
who organized and provided all transportation and provisions both in
base camp in the Koryak Mountains and en route between the base camp and
Anadyr. We also are grateful to Prof. A. J. T. Jull, George Burr, and
the rest of the team at the Accelerator Mass Spectrometry Laboratory,
University of Arizona, for their excellent work in producing the
14C age dates of the blue clay layer. Finally, this
manuscript benefitted greatly from constructive reviews by Drs. Michael
Weisberg, Misha Petaev, and Associate Editor Adrian Brearley.
NR 24
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U1 2
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PU WILEY-BLACKWELL
PI HOBOKEN
PA 111 RIVER ST, HOBOKEN 07030-5774, NJ USA
SN 1086-9379
EI 1945-5100
J9 METEORIT PLANET SCI
JI Meteorit. Planet. Sci.
PD AUG
PY 2013
VL 48
IS 8
BP 1499
EP 1514
DI 10.1111/maps.12170
PG 16
WC Geochemistry & Geophysics
SC Geochemistry & Geophysics
GA 237KC
UT WOS:000325867500009
ER
PT J
AU Kralj-Fiser, S
Schneider, JM
Kuntner, M
AF Kralj-Fiser, Simona
Schneider, Jutta M.
Kuntner, Matjaz
TI Challenging the Aggressive Spillover Hypothesis: Is Pre-Copulatory
Sexual Cannibalism a Part of a Behavioural Syndrome?
SO ETHOLOGY
LA English
DT Review
ID SOCIALLY POLYMORPHIC SPIDER; ORB-WEAVING SPIDERS; WEB SPIDER; FITNESS
CONSEQUENCES; SPERM COMPETITION; DOLOMEDES-TRITON; NEPHILID SPIDERS;
PRAYING-MANTIS; FISHING SPIDER; MATE CHOICE
AB Pre-copulatory cannibalism - females devouring males during courtship - may bring no benefit to either sex. The aggressive spillover hypothesis' (ASH) posits that pre-copulatory cannibalism represents a spillover of female aggressiveness from the juvenile foraging context, when aggressiveness is advantageous, to the adult mating context, when aggressiveness may be non-adaptive or maladaptive. The ASH suggests that individuals exhibit limited plasticity in aggressive behaviours because they are genetically canalised for indiscriminate aggressiveness towards prey and conspecifics, including males. Hence, a tendency to employ pre-copulatory cannibalism is a part of the female aggression syndrome, an assertion generally accepted in the personality field. We here re-evaluate the previous findings in the light of personality criteria, which we propose for ASH validation: between-individual differences, repeatability and heritability in tendency for pre-copulatory attacks (and pre-copulatory cannibalism) and voracity towards prey, and their correlation. To re-evaluate ASH and to allow for additional or alternative explanations, we ask whether pre-copulatory cannibalism depends on female hunger, mating status, size and/or male quality. Finally, we ask whether cannibalistic females have a reduced reproductive success as predicted by the ASH. While repeatability and heritability in voracity towards prey and its correlation with the tendency to engage in pre-copulatory cannibalism were found in certain systems, we lack any evidence for repeatability and heritability in pre-copulatory cannibalistic attempts and for its maladaptiveness. Rather than only resorting to the ASH, foraging and mate choice hypotheses may also explain pre-copulatory cannibalism. We suggest clarifying the use of the terms sexual cannibalism (effect) and female aggressiveness or tendency to attack and devour males (cause), and argue that male strategies to avoid cannibalism should be considered. We propose testing the ASH as the explanation for pre-copulatory cannibalism in those cases where female tendency to devour males correlates with actual pre-copulatory cannibalism and when all the above criteria are fulfilled. Finally, we propose future directions for studying the ASH.
C1 [Kralj-Fiser, Simona] Slovenian Acad Sci & Arts, Ctr Sci Res, Inst Biol, Ljubljana SI-1001, Slovenia.
[Schneider, Jutta M.] Univ Hamburg, Biozentrum Grindel, Museum & Inst Zool, Hamburg, Germany.
[Kuntner, Matjaz] Smithsonian Inst, Dept Entomol, Natl Museum Nat Hist, Washington, DC 20560 USA.
[Kuntner, Matjaz] Hubei Univ, Coll Life Sci, Wuhan, Hubei, Peoples R China.
RP Kralj-Fiser, S (reprint author), Slovenian Acad Sci & Arts, Ctr Sci Res, Inst Biol, Novi Trg 2,POB 306, Ljubljana SI-1001, Slovenia.
EM simonakf@gmail.com
RI Schneider, Jutta /G-3727-2010
FU Slovenian Research Agency [Z1-4194, P1-0236]
FX This research was supported by the Slovenian Research Agency, grants
Z1-4194 to S. K. F. and P1-0236 to M. K.
NR 57
TC 12
Z9 12
U1 7
U2 72
PU WILEY-BLACKWELL
PI HOBOKEN
PA 111 RIVER ST, HOBOKEN 07030-5774, NJ USA
SN 0179-1613
EI 1439-0310
J9 ETHOLOGY
JI Ethology
PD AUG
PY 2013
VL 119
IS 8
BP 615
EP 623
DI 10.1111/eth.12111
PG 9
WC Psychology, Biological; Behavioral Sciences; Zoology
SC Psychology; Behavioral Sciences; Zoology
GA 237FU
UT WOS:000325854800001
ER
PT J
AU Mello, MAR
Kalko, EKV
Silva, WR
AF Mello, Marco A. R.
Kalko, Elisabeth K. V.
Silva, Wesley R.
TI Effects of moonlight on the capturability of frugivorous phyllostomid
bats (Chiroptera: Phyllostomidae) at different time scales
SO ZOOLOGIA
LA English
DT Article
DE Activity; behavior; foraging; lunar phobia; mist netting
ID FORAGING BEHAVIOR; LUNAR PHOBIA; BRAZIL; PREDATION; PATTERNS; CYCLE
AB Some bat species seem to be lunar phobic, i.e., they avoid flying in bright areas or during bright periods of the night; however, the evidence is still controversial. We think that part of this controversy comes from pooling data on bat captures and moonlight intensity according to broad categories, such as moon phases, which conceal the high variability among nights. Therefore, we used detailed, long-term field data on three phyllostomid bat species, in order to test the hypothesis of lunar phobia at two different time scales: 1) among nights, by pooling data of different nights according to moon phases and testing for differences in the distribution of captures; and 2) within a night, by analyzing the relationship between capturability and moonlight intensity (measured as illuminance) in one-hour intervals for 29 individual nights. Although most captures of the studied bat species occurred in the first half of the night, their activity pattern varied largely among nights, and was not always unimodal as commonly assumed. At the larger time scale, all studied bat species showed evidence of lunar phobia, as they were more frequently captured on dark moon phases. Nevertheless, at the smaller time scale, only Carollia perspicillata (Linnaeus, 1758) was less frequently captured on brighter periods of the night. We propose that the unimodal activity pattern assumed for frugivorous phyllostomid bats may be an artifact of data organization, and that activity and lunar phobia are much more variable than previously assumed.
C1 [Mello, Marco A. R.] Univ Fed Minas Gerais, Inst Ciencias Biol, Dept Biol Geral, BR-31270901 Belo Horizonte, MG, Brazil.
[Mello, Marco A. R.; Kalko, Elisabeth K. V.] Univ Ulm, Inst Expt Okol, D-89069 Ulm, Germany.
[Kalko, Elisabeth K. V.] Smithsonian Trop Res Inst, Balboa, Panama.
[Silva, Wesley R.] Univ Estadual Campinas, Dept Zool, Campinas, SP, Brazil.
RP Mello, MAR (reprint author), Univ Fed Minas Gerais, Inst Ciencias Biol, Dept Biol Geral, Ave Antonio Carlos 6627, BR-31270901 Belo Horizonte, MG, Brazil.
EM marmello@gmail.com
RI Mello, Marco/B-1095-2008
OI Mello, Marco/0000-0002-9098-9427
FU Lincoln Park Zoo; Rio de Janeiro Research Foundation (Faperj)
[E-26/150.662/2000]; Sao Paulo Research Foundation (Fapesp)
[02/09286-0]; German Academic Exchange Service (DAAD) [290088/2004-6];
Alexander von Humboldt Foundation (AvH) [1134644]; Federal University of
Minas Gerais
FX We are very grateful to many people who helped us in this study. Ivan
Sazima, James Roper,. Mauro Galetti, Marcelo Nogueira, Joao
Vasconcellos-Neto, and Ariovaldo Cruz-Neto made important suggestions to
earlier versions of the manuscript. Joao Moreira provided us with the
worksheet for illuminance calculation. Fernando Fernandez helped us with
fieldwork infrastructure. IBAMA, especially Dionisio Pessamilio and
Rodrigo Mayerhofer, allowed us to work at Poco das Antas. This work was
supported by grants to MARM from the Lincoln Park Zoo, Rio de Janeiro
Research Foundation (Faperj, E-26/150.662/2000), Sao Paulo Research
Foundation (Fapesp, 02/09286-0), German Academic Exchange Service (DAAD,
290088/2004-6), Alexander von Humboldt Foundation (AvH, 1134644), and
Federal University of Minas Gerais.
NR 35
TC 2
Z9 2
U1 3
U2 20
PU SOC BRASILEIRA ZOOLOGIA, UNIV FEDERAL PARANA
PI CURITIBA
PA CAIXA POSTAL 19020, CURITIBA, PARANA 81531-980, BRAZIL
SN 1984-4670
J9 ZOOLOGIA-CURITIBA
JI Zoologia
PD AUG
PY 2013
VL 30
IS 4
BP 397
EP 402
DI 10.1590/S1984-46702013000400005
PG 6
WC Zoology
SC Zoology
GA 234SK
UT WOS:000325664400005
ER
PT J
AU DiMichele, WA
Elrick, SD
Bateman, RM
AF DiMichele, William A.
Elrick, Scott D.
Bateman, Richard M.
TI GROWTH HABIT OF THE LATE PALEOZOIC RHIZOMORPHIC TREE-LYCOPSID FAMILY
DIAPHORODENDRACEAE: PHYLOGENETIC, EVOLUTIONARY, AND PALEOECOLOGICAL
SIGNIFICANCE
SO AMERICAN JOURNAL OF BOTANY
LA English
DT Article
DE arborescent lycopsids; Diaphorodendron; evolutionary-developmental
change; growth architecture; Isoetales s.l.; lateral branching;
lycophyte; paedomorphosis; Pennsylvanian; saltation; Scotland;
Synchysidendron; USA
ID AGE HERRIN COAL; GEN-NOV; ARBORESCENT LYCOPSIDS; PENNSYLVANIAN-AGE;
SALTATIONAL EVOLUTION; HOPEFUL MONSTERS; LEPIDODENDRON; EURAMERICA;
ARCHITECTURE; LYCOPODS
AB Premise of the study: Rhizomorphic lycopsids evolved the tree habit independently of all other land plants. Newly discovered specimens allow radical revision of our understanding of the growth architectures of the extinct Paleozoic sister-genera Synchysidendron and Diaphorodendron.
Methods: Detailed descriptions of six remarkable adpression specimens from the Pennsylvanian of the USA and three casts from the late Mississippian of Scotland are used to revise and reanalyze a previously published morphological cladistic matrix and to reinterpret their remarkable growth forms.
Key results: Contrary to previous assertions, Synchysidendron resembled Diaphorodendron in having a distinct and relatively complex growth habit that emphasized serially homologous, closely spaced, deciduous lateral branches at the expense of reduced monocarpic crown branches. Lateral branches originated through several strongly anisotomous dichotomies before producing during extended periods large numbers of Achlamydocarpon strobili. The comparatively large diameter of abscission scars remaining on the main trunk and the emergence of branches above the horizontal plane suggest that the lateral branch systems were robust. Lateral branches were borne in two opposite rows on the main trunk and continued upward into an isotomously branched, determinate crown; their striking distichous arrangement caused preferred orientation of fallen trunks on bedding planes.
Conclusions: This discovery identifies the plagiotropic growth habit, dominated by serial lateral branches, as ubiquitous in the Diaphorodendraceae and also as unequivocally primitive within Isoetales s.l., a conclusion supported by both the revised morphological cladistic analysis and relative first appearances of taxa in the fossil record. Previously assumed complete homology between crown branching in Lepidodendraceae and that of all earlier-divergent genera requires reassessment. Saltational phenotypic transitions via modification of key developmental switches remains the most credible explanation for architectural evolution in the group. The resulting architecture allowed Diaphorodendraceae to co-dominate disturbed, clastic, equatorial wetlands from the Asbian to the Early Permian.
C1 [DiMichele, William A.] Natl Museum Nat Hist, Dept Paleobiol, Smithsonian Inst, Washington, DC 20560 USA.
[Elrick, Scott D.] Univ Illinois, Coal Sect, Illinois Geol Survey, Champaign, IL 61820 USA.
[Bateman, Richard M.] Royal Bot Gardens Kew, Jodrell Lab, Richmond TW9 3DS, Surrey, England.
RP Bateman, RM (reprint author), Royal Bot Gardens Kew, Jodrell Lab, Richmond TW9 3DS, Surrey, England.
EM r.bateman@kew.org
NR 69
TC 11
Z9 11
U1 3
U2 13
PU BOTANICAL SOC AMER INC
PI ST LOUIS
PA PO BOX 299, ST LOUIS, MO 63166-0299 USA
SN 0002-9122
J9 AM J BOT
JI Am. J. Bot.
PD AUG
PY 2013
VL 100
IS 8
BP 1604
EP 1625
DI 10.3732/ajb.1200623
PG 22
WC Plant Sciences
SC Plant Sciences
GA 228GL
UT WOS:000325173800010
PM 23935114
ER
PT J
AU Osmond, MM
Reudink, MW
Germain, RR
Marra, PP
Nocera, JJ
Boag, PT
Ratcliffe, LM
AF Osmond, Matthew M.
Reudink, Matthew W.
Germain, Ryan R.
Marra, Peter P.
Nocera, Joseph J.
Boag, Peter T.
Ratcliffe, Laurene M.
TI Relationships between carotenoid-based female plumage and age,
reproduction, and mate colour in the American Redstart (Setophaga
ruticilla)
SO CANADIAN JOURNAL OF ZOOLOGY-REVUE CANADIENNE DE ZOOLOGIE
LA English
DT Article
DE American Redstart; carotenoid; colour; female ornament; plumage;
Setophaga ruticilla; sexual selection
ID FLYCATCHER FICEDULA-HYPOLEUCA; SEXUAL SELECTION; PIED FLYCATCHER;
INTRASEXUAL COMPETITION; MUTUAL ORNAMENTATION; NORTHERN CARDINALS;
PARENTAL QUALITY; MIGRATORY BIRD; TREE SWALLOWS; ARRIVAL DATE
AB Most studies investigating the function and evolution of ornaments have focused on males. Variation in ornaments may also reflect individual quality and convey information in females. We examined correlations between female plumage colour and reproductive variables in the sexually dichromatic songbird, the American Redstart (Setophaga ruticilla (L., 1758)). Female American Redstarts display yellow, carotenoid-based plumage patches on their tails, wings, and flanks. Using reflectance spectrometry, we quantified brightness (feather structure) and "yellowness" (hue and chroma) of tail and flank feathers to examine whether female plumage colour varies with age, reproductive success, parental care, and the plumage colour of mates. Female plumage varied with age, with adult (after-second-year) females having brighter tail feathers than first-year females. We failed to find a relationship between female plumage colour and pairing or first-egg dates. However, adult females with brighter tails visited their nests less frequently and first-year females with brighter tails fledged fewer offspring. Adult females with brighter tails also mated with males who provided less care. In addition, adult females with yellower flanks paired with males with brighter flanks and with males who provided less parental care. We suggest that plumage colouration in female American Redstarts can act as a signal of individual age and quality.
C1 [Osmond, Matthew M.; Reudink, Matthew W.; Germain, Ryan R.; Nocera, Joseph J.; Boag, Peter T.; Ratcliffe, Laurene M.] Queens Univ, Dept Biol, Kingston, ON K7L 3N6, Canada.
[Reudink, Matthew W.; Marra, Peter P.] Smithsonian Conservat Biol Inst, Migratory Bird Ctr, Washington, DC 20008 USA.
RP Osmond, MM (reprint author), Michigan State Univ, WK Kellogg Biol Stn, Hickory Corners, MI 49060 USA.
EM matthew.osmond@mail.mcgill.ca
RI Boag, Peter/B-2907-2014;
OI Boag, Peter/0000-0003-0050-2089; Reudink, Matthew/0000-0001-8956-5849
FU Natural Sciences and Engineering Research Council of Canada; Canadian
Foundation for Innovation; National Science Foundation [0085965];
Smithsonian Institution; Queen's University; Ontario Innovation Trust;
Sigma Xi; American Ornithologists' Union; Society of Canadian
Ornithologists; American Museum of Natural History
FX We gratefully acknowledge the hard work of the many field assistants
that contributed to this study. R. Reudink, T. Murphy, and two anonymous
reviewers provided insightful discussion and comments on earlier
versions of the manuscript. We thank R. Montgomerie for the use of his
colour analysis equipment, software, and expertise. Funding was provided
by the Natural Sciences and Engineering Research Council of Canada, the
Canadian Foundation for Innovation, a National Science Foundation grant
to P.P.M. (0085965), the Smithsonian Institution, Queen's University,
Ontario Innovation Trust, Sigma Xi, the American Ornithologists' Union,
the Society of Canadian Ornithologists, and the American Museum of
Natural History.
NR 71
TC 7
Z9 7
U1 5
U2 48
PU CANADIAN SCIENCE PUBLISHING, NRC RESEARCH PRESS
PI OTTAWA
PA 1200 MONTREAL ROAD, BUILDING M-55, OTTAWA, ON K1A 0R6, CANADA
SN 0008-4301
J9 CAN J ZOOL
JI Can. J. Zool.-Rev. Can. Zool.
PD AUG
PY 2013
VL 91
IS 8
BP 589
EP 595
DI 10.1139/cjz-2013-0017
PG 7
WC Zoology
SC Zoology
GA 221TS
UT WOS:000324683000007
ER
PT J
AU Schook, MW
Wildt, DE
Weiss, RB
Wolfe, BA
Archibald, KE
Pukazhenthi, BS
AF Schook, Mandi W.
Wildt, David E.
Weiss, Rachael B.
Wolfe, Barbara A.
Archibald, Kate E.
Pukazhenthi, Budhan S.
TI Fundamental Studies of the Reproductive Biology of the Endangered
Persian Onager (Equus hemionus onager) Result in First Wild Equid
Offspring from Artificial Insemination
SO BIOLOGY OF REPRODUCTION
LA English
DT Article
DE artificial insemination; cryopreservation; endocrine; equid; estrous
cycle; onager
ID SPERMATOZOAL MOTILITY PARAMETERS; DAILY SPERM OUTPUT; SEMEN
CHARACTERISTICS; LUTEINIZING-HORMONE; OVARIAN ACTIVITY; ESTROUS-CYCLE;
MARES; STALLIONS; PATTERNS; DONKEY
AB We studied the Persian onager (Equus hemionus onager), an endangered equid subspecies. The objective was to characterize endocrine patterns and ovarian follicular dynamics of females as well as seminal traits and sperm sensitivity to cryopreservation in males as a prerequisite to testing the feasibility of artificial insemination (AI). Urinary progesterone and estrogen metabolite profiles were determined by enzyme immunoassay in 11 females. Serial ultrasonography of ovarian activity was performed for 2 mo in a subset of four females. Females were seasonally polyestrous (June-November). Ovarian morphometry via ultrasonography and urinary progesterone profiles were more reflective of reproductive events than urinary estrogen patterns, and preovulatory follicle size was smaller than reported for other equid species. There was evidence for lactational suppression of estrus for up to 1.5 yr in nursing dams. Electroejaculation allowed recovery of highly motile sperm from 7, anesthetized males on 57% of occasions. Spermatozoa, including motility and acrosomal integrity, were resilient to freeze-thawing. Artificial insemination was successful in 2 of 3 females following detection of a dominant follicle and deslorelin administration, resulting in births of a healthy female and male foal by using fresh/chilled and frozen/thawed sperm, respectively.
C1 [Schook, Mandi W.; Wildt, David E.; Archibald, Kate E.; Pukazhenthi, Budhan S.] Natl Zool Pk, Smithsonian Conservat Biol Inst, Front Royal, VA USA.
[Schook, Mandi W.; Weiss, Rachael B.; Wolfe, Barbara A.] The Wilds, Cumberland, OH USA.
RP Schook, MW (reprint author), Cleveland Metropk Zoo, Cleveland, OH 44109 USA.
EM mmv@clevelandmetroparks.com; pukazhenthib@si.edu
FU Sichel Endowment Fund; Phillip Reed, Jr., Fund
FX Supported by the Sichel Endowment Fund and the Phillip Reed, Jr., Fund.
Presented in part at the International Wild Equid Conference, September
18-22, 2012, University of Veterinary Medicine, Vienna, Austria.
NR 85
TC 5
Z9 5
U1 2
U2 8
PU SOC STUDY REPRODUCTION
PI MADISON
PA 1691 MONROE ST,SUITE # 3, MADISON, WI 53711-2021 USA
SN 0006-3363
J9 BIOL REPROD
JI Biol. Reprod.
PD AUG
PY 2013
VL 89
IS 2
AR 41
DI 10.1095/biolreprod.113.110122
PG 13
WC Reproductive Biology
SC Reproductive Biology
GA 220JU
UT WOS:000324580000004
PM 23863403
ER
PT J
AU Batygin, K
Morbidelli, A
AF Batygin, K.
Morbidelli, A.
TI Analytical treatment of planetary resonances
SO ASTRONOMY & ASTROPHYSICS
LA English
DT Article
DE celestial mechanics; planets and satellites: dynamical evolution and
stability; chaos
ID MEAN-MOTION RESONANCE; GASEOUS PROTOPLANETARY DISK; EXTRA-SOLAR PLANETS;
LARGE-SCALE CHAOS; ORBITAL RESONANCES; TIDAL EVOLUTION; GIANT PLANETS;
PERTURBATIVE TREATMENT; OSCILLATOR SYSTEMS; CLOSE ENCOUNTERS
AB An ever-growing observational aggregate of extrasolar planets has revealed that systems of planets that reside in or near mean-motion resonances are relatively common. While the origin of such systems is attributed to protoplanetary disk-driven migration, a qualitative description of the dynamical evolution of resonant planets remains largely elusive. Aided by the pioneering works of the last century, we formulate an approximate, integrable theory for first-order resonant motion. We utilize the developed theory to construct an intuitive, geometrical representation of resonances within the context of the unrestricted three-body problem. Moreover, we derive a simple analytical criterion for the appearance of secondary resonances between resonant and secular motion. Subsequently, we demonstrate the onset of rapid chaotic motion as a result of overlap among neighboring first-order mean-motion resonances, as well as the appearance of slow chaos as a result of secular modulation of the planetary orbits. Finally, we take advantage of the integrable theory to analytically show that, in the adiabatic regime, divergent encounters with first-order mean-motion resonances always lead to persistent apsidal anti-alignment.
C1 [Batygin, K.; Morbidelli, A.] Observ Cote Azur, Dept Lagrange, F-06304 Nice, France.
[Batygin, K.] Harvard Smithsonian Ctr Astrophys, Inst Theory & Computat, Cambridge, MA 02138 USA.
RP Batygin, K (reprint author), Observ Cote Azur, Dept Lagrange, F-06304 Nice, France.
EM kbatygin@cfa.harvard.edu; orby@oca.eu
FU Institute for Theory and Computation, Harvard-Smithsonian Center for
Astrophysics
FX We wish to thank Jake Ketchum and Matt Holman for carefully reviewing
the manuscript and providing helpful suggestions. We wish to thank
Christian Beauge for a very thorough and insightful referee report that
greatly enhanced the quality of this manuscript. K. B. acknowledges the
generous support from the ITC Prize Postdoctoral Fellowship at the
Institute for Theory and Computation, Harvard-Smithsonian Center for
Astrophysics.
NR 88
TC 10
Z9 10
U1 0
U2 6
PU EDP SCIENCES S A
PI LES ULIS CEDEX A
PA 17, AVE DU HOGGAR, PA COURTABOEUF, BP 112, F-91944 LES ULIS CEDEX A,
FRANCE
SN 0004-6361
J9 ASTRON ASTROPHYS
JI Astron. Astrophys.
PD AUG
PY 2013
VL 556
AR A28
DI 10.1051/0004-6361/201220907
PG 20
WC Astronomy & Astrophysics
SC Astronomy & Astrophysics
GA 211GH
UT WOS:000323893500028
ER
PT J
AU Elliott, J
Kruhler, T
Greiner, J
Savaglio, S
Olivares, F
Rau, EA
Postigo, AD
Sanchez-Ramirez, R
Wiersema, K
Schady, P
Kann, DA
Filgas, R
Nardini, M
Berger, E
Fox, D
Gorosabel, J
Klose, S
Levan, A
Guelbenzu, AN
Rossi, A
Schmidl, S
Sudilovsky, V
Tanvir, NR
Thone, CC
AF Elliott, J.
Kruehler, T.
Greiner, J.
Savaglio, S.
Olivares, F.
Rau, E. A.
de Ugarte Postigo, A.
Sanchez-Ramirez, R.
Wiersema, K.
Schady, P.
Kann, D. A.
Filgas, R.
Nardini, M.
Berger, E.
Fox, D.
Gorosabel, J.
Klose, S.
Levan, A.
Guelbenzu, A. Nicuesa
Rossi, A.
Schmidl, S.
Sudilovsky, V.
Tanvir, N. R.
Thoene, C. C.
TI The low-extinction afterglow in the solar-metallicity host galaxy of
gamma-ray burst 110918A
SO ASTRONOMY & ASTROPHYSICS
LA English
DT Article
DE gamma-ray burst: general; gamma-ray burst: individual: 110918A; ISM:
general; galaxies: abundances; galaxies: photometry; galaxies: star
formation
ID STAR-FORMING GALAXIES; INITIAL MASS FUNCTION; DIGITAL SKY SURVEY; DUST
EXTINCTION; STELLAR MASS; PHOTOMETRIC REDSHIFTS; LUMINOSITY FUNCTION;
STARBURST GALAXIES; OPTICAL AFTERGLOWS; FORMATION HISTORY
AB Galaxies selected through long gamma-ray bursts (GRBs) could be of fundamental importance when mapping the star formation history out to the highest redshifts. Before using them as efficient tools in the early Universe, however, the environmental factors that govern the formation of GRBs need to be understood. Metallicity is theoretically thought to be a fundamental driver in GRB explosions and energetics, but it is still, even after more than a decade of extensive studies, not fully understood. This is largely related to two phenomena: a dust-extinction bias, which prevented high-mass and thus likely high-metallicity GRB hosts from being detected in the first place, and a lack of efficient instrumentation, which limited spectroscopic studies, including metallicity measurements, to the low-redshift end of the GRB host population. The subject of this work is the very energetic GRB 110918A (E-gamma,E-iso = 1.9 x 10(54) erg), for which we measure a redshift of z = 0.984. GRB 110918A gave rise to a luminous afterglow with an intrinsic spectral slope of beta = 0.70, which probed a sight-line with little extinction (A(V)(GRB) = 0.16 mag) and soft X-ray absorption (N-H,N-X = (1.6 +/- 0.5) x 10(21) cm(-2)) typical of the established distributions of afterglow properties. However, photometric and spectroscopic follow-up observations of the galaxy hosting GRB 110918A, including optical/near-infrared photometry with the Gamma-Ray burst Optical Near-infrared Detector and spectroscopy with the Very Large Telescope/X-shooter, reveal an all but average GRB host in comparison to the z similar to 1 galaxies selected through similar afterglows to date. It has a large spatial extent with a half-light radius of R-1/2 similar to 10 kpc, the highest stellar mass for z < 1.9 (log(M-*/M-circle dot) = 10.68 +/- 0.16), and an H alpha-based star formation rate of SFRH alpha = 41(-16)(+28) M-circle dot yr(-1). We measure a gas-phase extinction of A(V)(gas) similar to 1.8 mag through the Balmer decrement and one of the largest host-integrated metallicities ever of around solar using the well-constrained ratios of [N II]/H alpha and [N II]/[O II] (12 + log (O/H) = 8.93 +/- 0.13 and 8.85(-0.18)(+0.14), respectively). This presents one of the very few robust metallicity measurements of GRB hosts at z similar to 1, and establishes that GRB hosts at z similar to 1 can also be very metal rich. It conclusively rules out a metallicity cut-off in GRB host galaxies and argues against an anti-correlation between metallicity and energy release in GRBs.
C1 [Elliott, J.; Greiner, J.; Savaglio, S.; Olivares, F.; Rau, E. A.; Schady, P.; Kann, D. A.; Filgas, R.; Sudilovsky, V.] Max Planck Inst Extraterr Phys, D-85748 Garching, Germany.
[Kruehler, T.; de Ugarte Postigo, A.] Univ Copenhagen, Niels Bohr Inst, Dark Cosmol Ctr, DK-2100 Copenhagen, Denmark.
[de Ugarte Postigo, A.; Sanchez-Ramirez, R.; Gorosabel, J.; Thoene, C. C.] Inst Astrofis Andalucia IAA CSIC, Granada 18008, Spain.
[Wiersema, K.; Tanvir, N. R.] Univ Leicester, Dept Phys & Astron, Leicester LE1 7RH, Leics, England.
[Kann, D. A.; Klose, S.; Guelbenzu, A. Nicuesa; Rossi, A.; Schmidl, S.] Thuringer Landessternwarte Tautenburg, D-07778 Tautenburg, Germany.
[Filgas, R.] Czech Tech Univ, Inst Expt & Appl Phys, Prague 12800, Czech Republic.
[Nardini, M.] Univ Milano Bicocca, I-20126 Milan, Italy.
[Berger, E.] Harvard Smithsonian Ctr Astrophys, Cambridge, MA 02138 USA.
[Fox, D.] Penn State Univ, Dept Astron & Astrophys, University Pk, PA 16802 USA.
[Levan, A.] Univ Warwick, Dept Phys, Coventry CV4 7AL, W Midlands, England.
[Gorosabel, J.] Univ Pais Vasco UPV EHU, ETS Ingn, Unidad Asociada Grp Ciencia Planetarias UPV EHU I, Dept Fis Aplicada 1, Bilbao 48013, Spain.
[Gorosabel, J.] Ikerbasque, Basque Fdn Sci, Bilbao 48008, Spain.
RP Elliott, J (reprint author), Max Planck Inst Extraterr Phys, Giessenbachstr 1, D-85748 Garching, Germany.
EM jonnyelliott@mpe.mpg.de
RI Rossi, Andrea/N-4674-2015
OI Rossi, Andrea/0000-0002-8860-6538
FU DFG [HA 1850/28-1, SA 2001/1-1, SA 2001/2-1]; National Aeronautics and
Space Administration; Marie Curie Career Integration Grant Fellowship;
European Commission under the Marie Curie Intra-European Fellowship
Programme; Danish National Research Foundation; MPG [M.FE.A.Ext 00003];
Deutscher Akademischer Austausch-Dienst (DAAD); Dark Cosmology Centre;
STFC; DFG cluster of excellence Origin and Structure of the Universe;
National Science Foundation [AST-1107973]; [AYA2012-39362-C02-02];
[AYA2011-24780/ESP]; [AYA2009-14000-C03-01/ESP];
[AYA2010-21887-C04-01]
FX We thank the anonymous referees for their constructive criticisms, Regis
Lachaume for the WFI observations, and Mara Salvato and Ivan Baldry for
helpful discussions. Part of the funding for GROND (both hardware as
well as personnel) was generously granted from the Leibniz-Prize to
Prof. G. Hasinger (DFG grant HA 1850/28-1). Based on observations made
with the Gran Telescopio Canarias (GTC), that is installed in the
Spanish Observatorio del Roque de los Muchachos of the Instituto de
AstrofAnsica de Canarias on the island of La Palma. This work made use
of data supplied by the UK Swift Science Data Centre at the University
of Leicester. This publication makes use of data products from the
Wide-field Infrared Survey Explorer, which is a joint project of the
University of California, Los Angeles, and the Jet Propulsion
Laboratory/California Institute of Technology, funded by the National
Aeronautics and Space Administration. A.d.U.P. acknowledges support from
a Marie Curie Career Integration Grant Fellowship. T. K. acknowledges
support by the European Commission under the Marie Curie Intra-European
Fellowship Programme. The Dark Cosmology Centre is funded by the Danish
National Research Foundation. SS acknowledges support through project
M.FE.A.Ext 00003 of the MPG. F.O.E. acknowledges funding of his Ph.D.
through the Deutscher Akademischer Austausch-Dienst (DAAD). A.d.U.P., C.
T., R. S. R., and J.G. acknowledge support from the Spanish research
projects AYA2012-39362-C02-02, AYA2011-24780/ESP,
AYA2009-14000-C03-01/ESP, and AYA2010-21887-C04-01. A.d.U.P.
acknowledges support from The Dark Cosmology Centre. K. W. acknowledges
support by the STFC. P. S. acknowledges support by DFG grant SA
2001/1-1. D. A. K. acknowledges support by the DFG cluster of excellence
Origin and Structure of the Universe. S. K., A.N.G., and A. R.
acknowledge support by DFG grant Kl 766/16-1. A. R., A.N.G., A. K., and
D. A. K. are grateful for travel funding support through MPE. M.N.
acknowledges support by DFG grant SA 2001/2-1. E. B. acknowledges
support from the National Science Foundation through Grant AST-1107973.
J.E. is thankful for the support from A. and G. Elliott.
NR 110
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SN 0004-6361
J9 ASTRON ASTROPHYS
JI Astron. Astrophys.
PD AUG
PY 2013
VL 556
AR A23
DI 10.1051/0004-6361/201220968
PG 12
WC Astronomy & Astrophysics
SC Astronomy & Astrophysics
GA 211GH
UT WOS:000323893500023
ER
PT J
AU Lopez-Sepulcre, A
Taquet, V
Sanchez-Monge, A
Ceccarelli, C
Dominik, C
Kama, M
Caux, E
Fontani, F
Fuente, A
Ho, PTP
Neri, R
Shimajiri, Y
AF Lopez-Sepulcre, A.
Taquet, V.
Sanchez-Monge, A.
Ceccarelli, C.
Dominik, C.
Kama, M.
Caux, E.
Fontani, F.
Fuente, A.
Ho, P. T. P.
Neri, R.
Shimajiri, Y.
TI High-angular resolution observations towards OMC-2 FIR 4: Dissecting an
intermediate-mass protocluster
SO ASTRONOMY & ASTROPHYSICS
LA English
DT Article
DE ISM: individual objects: OMC-2 FIR 4; ISM: molecules
ID SUBMILLIMETER-WAVE OBSERVATIONS; STAR-FORMATION; PROTOSTELLAR ENVELOPES;
PHYSICAL STRUCTURE; MOLECULAR CLOUD; STELLAR CONTENT; ORION; CORES;
PROTOSTARS; EMISSION
AB Context. Intermediate-mass stars are an important ingredient of our Galaxy and a key to understanding how high-and low-mass stars form in clusters. One of the closest known young intermediate-mass protoclusters is OMC-2 FIR 4, which is located at a distance of 420 pc in Orion. This region is one of the few where the complete 500-2000 GHz spectrum has been observed with the heterodyne spectrometer HIFI on board the Herschel satellite, and unbiased spectral surveys at 0.8, 1, 2, and 3 mm have been obtained with the JCMT and IRAM 30-m telescopes.
Aims. We aim to disentangle the core multiplicity, to investigate the morphology of this region in order to study the formation of a low-and intermediate-mass protostar cluster, and to aid in interpretation of the single-dish line profiles already in our hands.
Methods. We used the IRAM Plateau de Bure Interferometer to image OMC-2 FIR 4 in the 2-mm continuum emission, as well as in DCO+(2-1), DCN(2-1), (CS)-S-34(3-2), and several CH3OH lines. In addition, we analysed observations of the NH3(1, 1) and (2, 2) inversion transitions that used the Very Large Array of the NRAO. The resulting maps have an angular resolution that allows us to resolve structures of 5 '', which is equivalent to similar to 2000 AU.
Results. Our observations reveal three spatially resolved sources within OMC-2 FIR 4, of one or several solar masses each, with hints of further unresolved substructure within them. Two of these sources have elongated shapes and are associated with dust continuum emission peaks, thus likely containing at least one molecular core each. One of them also displays radio continuum emission, which may be attributed to a young B3-B4 star that dominates the overall luminosity output of the region. The third identified source displays a DCO+(2-1) emission peak and weak dust continuum emission. Its higher abundance of DCO+ relative to the other two regions suggests a lower temperature, hence its possible association with either a younger low-mass protostar or a starless core. It may alternatively be part of the colder envelope of OMC-2 FIR 4.
Conclusions. Our interferometric observations show the complexity of the intermediate-mass protocluster OMC-2 FIR 4, where multiple cores, chemical differentiation, and an ionised region all coexist within an area of only 10 000 AU.
C1 [Lopez-Sepulcre, A.; Taquet, V.; Ceccarelli, C.] UJF Grenoble 1, CNRS INSU, IPAG, UMR 5274, F-38041 Grenoble, France.
[Sanchez-Monge, A.; Fontani, F.] Osserv Astrofis Arcetri, I-50124 Florence, Italy.
[Dominik, C.; Kama, M.] Univ Amsterdam, Astron Inst Anton Pannekoek, NL-1090 GE Amsterdam, Netherlands.
[Dominik, C.] Radboud Univ Nijmegen, IMAPP, Dept Astrophys, NL-6525 AJ Nijmegen, Netherlands.
[Caux, E.] Univ Toulouse, UPS OMP, IRAP, F-31028 Toulouse 4, France.
[Caux, E.] IRAP, CNRS, F-31028 Toulouse 4, France.
[Fuente, A.] Observatorio Astron Nacl, Madrid 28803, Spain.
[Ho, P. T. P.] Acad Sinica, Inst Astron & Astrophys, Taipei 106, Taiwan.
[Ho, P. T. P.] Harvard Smithsonian Ctr Astrophys, Cambridge, MA 02138 USA.
[Neri, R.] IRAM, F-38406 St Martin Dheres, France.
[Shimajiri, Y.] Natl Inst Nat Sci, Natl Astron Observ Japan, Nobeyama Radio Observ, Minamimaki, Nagano 3841305, Japan.
RP Lopez-Sepulcre, A (reprint author), UJF Grenoble 1, CNRS INSU, IPAG, UMR 5274, F-38041 Grenoble, France.
EM ana.sepulcre@obs.ujf-grenoble.fr
RI Fuente, Asuncion/G-1468-2016;
OI Fuente, Asuncion/0000-0001-6317-6343; Kama, Mihkel/0000-0003-0065-7267;
Fontani, Francesco/0000-0003-0348-3418
FU CNES (Centre National d'Etudes Spatiales); Agence Nationale pour la
Recherche (ANR), France [ANR-08-BLAN-022]; NWO; NOVA; Leids
Kerkhoven-Bosscha Fonds; COST Action on Astrochemistry; CONSOLIDER
INGENIO [CSD2009-00038]
FX A.L.S. and C. C. acknowledge funding from the CNES (Centre National
d'Etudes Spatiales) and from the Agence Nationale pour la Recherche
(ANR), France (project FORCOMS, contracts ANR-08-BLAN-022). M. K.
gratefully acknowledges funding from an NWO grant, NOVA, Leids
Kerkhoven-Bosscha Fonds, and the COST Action on Astrochemistry. C. D.
acknowledges funding from Leids Kerkhoven-Bosscha Fonds. A. F. has been
partially supported within the programme CONSOLIDER INGENIO 2010, under
grant CSD2009-00038 "Molecular Astrophysics: The Herschel and ALMA
Era-ASTROMOL". We are grateful to the anonymous referee and to C. M.
Walmsley, whose suggestions contributed to improve the quality of the
present paper.
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PA 17, AVE DU HOGGAR, PA COURTABOEUF, BP 112, F-91944 LES ULIS CEDEX A,
FRANCE
SN 0004-6361
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JI Astron. Astrophys.
PD AUG
PY 2013
VL 556
AR A62
DI 10.1051/0004-6361/201220905
PG 13
WC Astronomy & Astrophysics
SC Astronomy & Astrophysics
GA 211GH
UT WOS:000323893500062
ER
PT J
AU Peter, H
Bingert, S
Klimchuk, JA
de Forest, C
Cirtain, JW
Golub, L
Winebarger, AR
Kobayashi, K
Korreck, KE
AF Peter, H.
Bingert, S.
Klimchuk, J. A.
de Forest, C.
Cirtain, J. W.
Golub, L.
Winebarger, A. R.
Kobayashi, K.
Korreck, K. E.
TI Structure of solar coronal loops: from miniature to large-scale
SO ASTRONOMY & ASTROPHYSICS
LA English
DT Article
DE Sun: corona; magnetic fields; Sun: UV radiation; Sun: activity; methods:
data analysis
ID DYNAMICS-OBSERVATORY SDO; ACTIVE-REGION LOOPS; TRANSITION-REGION;
MAGNETIC-FIELDS; BRIGHT POINTS; COOL LOOPS; HINODE; MODEL; TRACE; SUN
AB Aims. We use new data from the High-resolution Coronal Imager (Hi-C) with its unprecedented spatial resolution of the solar corona to investigate the structure of coronal loops down to 0.2 ''.
Methods. During a rocket flight, Hi-C provided images of the solar corona in a wavelength band around 193 angstrom that is dominated by emission from Fe XII showing plasma at temperatures around 1.5 MK. We analyze part of the Hi-C field-of-view to study the smallest coronal loops observed so far and search for the possible substructuring of larger loops.
Results. We find tiny 1.5 MK loop-like structures that we interpret as miniature coronal loops. Their coronal segments above the chromosphere have a length of only about 1 Mm and a thickness of less than 200 km. They could be interpreted as the coronal signature of small flux tubes breaking through the photosphere with a footpoint distance corresponding to the diameter of a cell of granulation. We find that loops that are longer than 50 Mm have diameters of about 2 '' or 1.5 Mm, which is consistent with previous observations. However, Hi-C really resolves these loops with some 20 pixels across the loop. Even at this greatly improved spatial resolution, the large loops seem to have no visible substructure. Instead they show a smooth variation in cross-section.
Conclusions. That the large coronal loops do not show a substructure on the spatial scale of 0.1 '' per pixel implies that either the densities and temperatures are smoothly varying across these loops or it places an upper limit on the diameter of the strands the loops might be composed of. We estimate that strands that compose the 2 '' thick loop would have to be thinner than 15 km. The miniature loops we find for the first time pose a challenge to be properly understood through modeling.
C1 [Peter, H.; Bingert, S.] Max Planck Inst Solar Syst Res, D-37191 Katlenburg Lindau, Germany.
[Klimchuk, J. A.] NASA, Heliophys Div, Goddard Space Flight Ctr, Greenbelt, MD 20771 USA.
[de Forest, C.] SW Res Inst, Instrumentat & Space Res Div, Boulder, CO 80302 USA.
[Cirtain, J. W.; Winebarger, A. R.] NASA, George C Marshall Space Flight Ctr, MSFC, Huntsville, AL 35812 USA.
[Golub, L.; Korreck, K. E.] Harvard Smithsonian Ctr Astrophys, Cambridge, MA 01238 USA.
[Kobayashi, K.] Univ Alabama, Ctr Space & Aeronaut Res, Huntsville, AL 35812 USA.
RP Peter, H (reprint author), Max Planck Inst Solar Syst Res, D-37191 Katlenburg Lindau, Germany.
EM peter@mps.mpg.de
RI Klimchuk, James/D-1041-2012
OI Klimchuk, James/0000-0003-2255-0305
FU NASA's Low Cost Access to Space program; Max-Planck/Princeton Center for
Plasma Physics; NASA
FX We acknowledge the High-resolution Coronal Imager instrument grant
funded by the NASA's Low Cost Access to Space program. MSFC/NASA led the
mission and partners include the Smithsonian Astrophysical Observatory
in Cambridge, Mass.; Lockheed Martin's Solar Astrophysical Laboratory in
Palo Alto, Calif.; the University of Central Lancashire in Lancashire,
England; and the Lebedev Physical Institute of the Russian Academy of
Sciences in Moscow. The AIA and HMI data used are provided courtesy of
NASA/SDO and the AIA and HMI science teams. The AIA and HMI data have
been retrieved using the German Data Center for SDO. The numerical
simulation was conducted at the High Performance Computing Center
Stuttgart (HLRS). This work was partially funded by the
Max-Planck/Princeton Center for Plasma Physics. The work of J.A.K. was
supported by the NASA Supporting Research and Technology and Guest
Investigator Programs. H.P. acknowledges stimulating discussions with
Robert Cameron and Aaron Birch. We thank the anonymous referee for
constructive comments.
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SN 1432-0746
J9 ASTRON ASTROPHYS
JI Astron. Astrophys.
PD AUG
PY 2013
VL 556
AR A104
DI 10.1051/0004-6361/201321826
PG 12
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SC Astronomy & Astrophysics
GA 211GH
UT WOS:000323893500104
ER
PT J
AU van der Marel, N
Kristensen, LE
Visser, R
Mottram, JC
Yildiz, UA
van Dishoeck, EF
AF van der Marel, N.
Kristensen, L. E.
Visser, R.
Mottram, J. C.
Yildiz, U. A.
van Dishoeck, E. F.
TI Outflow forces of low-mass embedded objects in Ophiuchus: a quantitative
comparison of analysis methods
SO ASTRONOMY & ASTROPHYSICS
LA English
DT Article
DE ISM: jets and outflows; ISM: molecules; stars: protostars; stars:
low-mass; circumstellar matter; submillimeter: ISM
ID YOUNG STELLAR OBJECTS; STAR-FORMING REGIONS; BIPOLAR MOLECULAR OUTFLOWS;
CO LINE FORMATION; RHO-OPHIUCHI; DARK CLOUD; SUBMILLIMETER; PROTOSTARS;
ENVELOPE; EVOLUTION
AB Context. The outflow force of molecular bipolar outflows is a key parameter in theories of young stellar feedback on their surroundings. The focus of many outflow studies is the correlation between the outflow force, bolometric luminosity, and envelope mass. However, it is difficult to combine the results of different studies in large evolutionary plots over many orders of magnitude due to the range of data quality, analysis methods, and corrections for observational effects, such as opacity and inclination.
Aims. We aim to determine the outflow force for a sample of low-luminosity embedded sources. We quantify the influence of the analysis method and the assumptions entering the calculation of the outflow force.
Methods. We used the James Clerk Maxwell Telescope to map (CO)-C-12 J = 3-2 over 2' x 2' regions around 16 Class I sources of a well-defined sample in Ophiuchus at 15 '' resolution. The outflow force was then calculated using seven different methods differing, e. g., in the use of intensity-weighted emission and correction factors for inclination. Two well studied outflows (HH 46 and NGC1 333 IRAS4A) are added to the sample and included in the comparison.
Results. The results from the analysis methods differ from each other by up to a factor of 6, whereas observational properties and choices in the analysis procedure affect the outflow force by up to a factor of 4. Subtraction of cloud emission and integrating over the remaining profile increases the outflow force at most by a factor of 4 compared to line wing integration. For the sample of Class I objects, bipolar outflows are detected around 13 sources including 5 new detections, where the three nondetections are confused by nearby outflows from other sources. New outflow structures without a clear powering source are discovered at the corners of some of the maps.
Conclusions. When combining outflow forces from different studies, a scatter by up to a factor of 5 can be expected. Although the true outflow force remains unknown, the separation method (separate calculation of dynamical time and momentum) is least affected by the uncertain observational parameters. The correlations between outflow force, bolometric luminosity, and envelope mass are further confirmed down to low-luminosity sources.
C1 [van der Marel, N.; Kristensen, L. E.; Mottram, J. C.; Yildiz, U. A.; van Dishoeck, E. F.] Leiden Univ, Leiden Observ, NL-2300 RA Leiden, Netherlands.
[Kristensen, L. E.] Harvard Smithsonian Ctr Astrophys, Cambridge, MA 02138 USA.
[Visser, R.] Univ Michigan, Dept Astron, Ann Arbor, MI 48109 USA.
[van Dishoeck, E. F.] Max Planck Inst Extraterr Phys, D-85748 Garching, Germany.
RP van der Marel, N (reprint author), Leiden Univ, Leiden Observ, POB 9513, NL-2300 RA Leiden, Netherlands.
EM nmarel@strw.leidenuniv.nl
RI Yildiz, Umut/C-5257-2011; Kristensen, Lars/F-4774-2011
OI Yildiz, Umut/0000-0001-6197-2864; Kristensen, Lars/0000-0003-1159-3721
FU Netherlands Research School for Astronomy (NOVA); Spinoza grant;
Netherlands Organisation for Scientific Research (NWO) [614.001.008]
FX The authors would like to thank Sylvie Cabrit and Mario Tafalla for
useful discussions, Antonio Chrysostomou who carried out part of the
12CO observations and Rowin Meijerink and Edo Loenen who
carried out the 13CO observations. The James Clerk Maxwell
Telescope is operated by the Joint Astronomy Centre on behalf of the
Science and Technology Facilities Council of the United Kingdom, the
Netherlands Organisation for Scientific Research, and the National
Research Council of Canada. Astrochemistry in Leiden is supported by the
Netherlands Research School for Astronomy (NOVA), by a Spinoza grant and
grant 614.001.008 from the Netherlands Organisation for Scientific
Research (NWO).
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SN 0004-6361
J9 ASTRON ASTROPHYS
JI Astron. Astrophys.
PD AUG
PY 2013
VL 556
AR A76
DI 10.1051/0004-6361/201220717
PG 23
WC Astronomy & Astrophysics
SC Astronomy & Astrophysics
GA 211GH
UT WOS:000323893500076
ER
PT J
AU Yildiz, UA
Kristensen, LE
van Dishoeck, EF
San Jose-Garcia, I
Karska, A
Harsono, D
Tafalla, M
Fuente, A
Visser, R
Jorgensen, JK
Hogerheijde, MR
AF Yildiz, U. A.
Kristensen, L. E.
van Dishoeck, E. F.
San Jose-Garcia, I.
Karska, A.
Harsono, D.
Tafalla, M.
Fuente, A.
Visser, R.
Jorgensen, J. K.
Hogerheijde, M. R.
TI High-J CO survey of low-mass protostars observed with Herschel-HIFI
SO ASTRONOMY & ASTROPHYSICS
LA English
DT Article
DE astrochemistry; stars: formation; stars: protostars; ISM: molecules;
techniques: spectroscopic
ID YOUNG STELLAR OBJECTS; STAR-FORMING REGIONS; PROTOSTELLAR ENVELOPES;
CIRCUMSTELLAR DISKS; CHEMICAL EVOLUTION; PACS SPECTROSCOPY; MOLECULAR
CLOUDS; SHOCK CHEMISTRY; BIPOLAR OUTFLOW; KEY PROGRAM
AB Context. In the deeply embedded stage of star formation, protostars start to heat and disperse their surrounding cloud cores. The evolution of these sources has traditionally been traced through dust continuum spectral energy distributions (SEDs), but the use of CO excitation as an evolutionary probe has not yet been explored due to the lack of high-J CO observations.
Aims. The aim is to constrain the physical characteristics (excitation, kinematics, column density) of the warm gas in low-mass protostellar envelopes using spectrally resolved Herschel data of CO and compare those with the colder gas traced by lower excitation lines.
Methods. Herschel-HIFI observations of high-J lines of (CO)-C-12, (CO)-C-13, and (CO)-O-18 (up to J(u) = 10, E-u up to 300 K) are presented toward 26 deeply embedded low-mass Class 0 and Class I young stellar objects, obtained as part of the Water In Star-forming regions with Herschel (WISH) key program. This is the first large spectrally resolved high-J CO survey conducted for these types of sources. Complementary lower J CO maps were observed using ground-based telescopes, such as the JCMT and APEX and convolved to matching beam sizes.
Results. The (CO)-C-12 10-9 line is detected for all objects and can generally be decomposed into a narrow and a broad component owing to the quiescent envelope and entrained outflow material, respectively. The (CO)-C-12 excitation temperature increases with velocity from similar to 60 K up to similar to 130 K. The median excitation temperatures for (CO)-C-12, (CO)-C-13, and (CO)-O-18 derived from single-temperature fits to the J(u) = 2-10 integrated intensities are similar to 70 K, 48 K and 37 K, respectively, with no significant difference between Class 0 and Class I sources and no trend with M-env or L-bol. Thus, in contrast to the continuum SEDs, the spectral line energy distributions (SLEDs) do not show any evolution during the embedded stage. In contrast, the integrated line intensities of all CO isotopologs show a clear decrease with evolutionary stage as the envelope is dispersed. Models of the collapse and evolution of protostellar envelopes reproduce the (CO)-O-18 results well, but underproduce the (CO)-C-13 and (CO)-C-12 excitation temperatures, due to lack of UV heating and outflow components in those models. The H2O 1(10) - 1(01)/CO 10-9 intensity ratio does not change significantly with velocity, in contrast to the H2O/CO 3-2 ratio, indicating that CO 10-9 is the lowest transition for which the line wings probe the same warm shocked gas as (HO)-O-2. Modeling of the full suite of (CO)-O-18 lines indicates an abundance profile for Class 0 sources that is consistent with a freeze-out zone below 25 K and evaporation at higher temperatures, but with some fraction of the CO transformed into other species in the cold phase. In contrast, the observations for two Class I sources in Ophiuchus are consistent with a constant high CO abundance profile.
Conclusions. The velocity resolved line profiles trace the evolution from the Class 0 to the Class I phase through decreasing line intensities, less prominent outflow wings, and increasing average CO abundances. However, the CO excitation temperature stays nearly constant. The multiple components found here indicate that the analysis of spectrally unresolved data, such as provided by SPIRE and PACS, must be done with caution.
C1 [Yildiz, U. A.; Kristensen, L. E.; van Dishoeck, E. F.; San Jose-Garcia, I.; Harsono, D.; Hogerheijde, M. R.] Leiden Univ, Leiden Observ, NL-2300 RA Leiden, Netherlands.
[Kristensen, L. E.] Harvard Smithsonian Ctr Astrophys, Cambridge, MA 02138 USA.
[van Dishoeck, E. F.; Karska, A.] Max Planck Inst Extraterr Phys, D-85748 Garching, Germany.
[Tafalla, M.] Observ Astron Nacl IGN, Madrid 28014, Spain.
[Fuente, A.] Observ Astron Nacl, Alcala De Henares 28803, Spain.
[Visser, R.] Univ Michigan, Dept Astron, Ann Arbor, MI 48109 USA.
[Jorgensen, J. K.] Univ Copenhagen, Niels Bohr Inst, DK-2100 Copenhagen O, Denmark.
[Jorgensen, J. K.] Univ Copenhagen, Nat Hist Museum Denmark, Ctr Star & Planet Format, DK-1350 Copenhagen K, Denmark.
RP Yildiz, UA (reprint author), Leiden Univ, Leiden Observ, POB 9513, NL-2300 RA Leiden, Netherlands.
EM yildiz@strw.leidenuniv.nl
RI Jorgensen, Jes Kristian/L-7936-2014; Yildiz, Umut/C-5257-2011; Fuente,
Asuncion/G-1468-2016; Kristensen, Lars/F-4774-2011; Karska,
Agata/O-5311-2016
OI Jorgensen, Jes Kristian/0000-0001-9133-8047; Yildiz,
Umut/0000-0001-6197-2864; Fuente, Asuncion/0000-0001-6317-6343;
Kristensen, Lars/0000-0003-1159-3721; Karska, Agata/0000-0001-8913-925X
FU Netherlands Research School for Astronomy (NOVA); Spinoza grant;
Netherlands Organisation for Scientific Research (NWO) [614.001.008];
European Community [238258]; Netherlands Organization for Scientific
Research (NWO) [600.063.310.10]
FX The authors are grateful to the rest of the WISH team for stimulating
discussions and to Joseph Mottram, Carolyn McCoey and the
anonymous referee for valuable comments on the manuscript. They also
thank the APEX, JCMT and Herschel staff as well as NL and MPIfR
observers for carrying out the observations. Astrochemistry in Leiden is
supported by The Netherlands Research School for Astronomy (NOVA), by a
Spinoza grant and grant 614.001.008 from The Netherlands Organisation
for Scientific Research (NWO), and by the European Community's Seventh
Framework Programme FP7/20072013 under grant agreement 238258 (LASSIE).
The authors are grateful to many funding agencies and the HIFI-ICC staff
who has been contributing for the construction of Herschel and HIFI for
many years. HIFI has been designed and built by a consortium of
institutes and university departments from across Europe, Canada and the
United States under the leadership of SRON Netherlands Institute for
Space Research, Groningen, The Netherlands and with major contributions
from Germany, France and the US. Consortium members are: Canada: CSA, U.
Waterloo; France: CESR, LAB, LERMA, IRAM; Germany: KOSMA, MPIfR, MPS;
Ireland, NUI Maynooth; Italy: ASI, IFSI-INAF, Osservatorio Astrofisico
di Arcetri-INAF; Netherlands: SRON, TUD; Poland: CAMK, CBK; Spain:
Observatorio Astronomico Nacional (IGN), Centro de Astrobiologia
(CSIC-INTA). Sweden: Chalmers University of Technology - MC2, RSS &
GARD; Onsala Space Observatory; Swedish National Space Board, Stockholm
University -Stockholm Observatory; Switzerland: ETH Zurich, FHNW; USA:
Caltech, JPL, NHSC. Construction of CHAMP+ is a collaboration between
the Max-Planck-Institut fur Radioastronomie Bonn, Germany; SRON
Netherlands Institute for Space Research, Groningen, The Netherlands;
The Netherlands Research School for Astronomy (NOVA); and the Kavli
Institute of Nanoscience at Delft University of Technology, The
Netherlands; with support from The Netherlands Organization for
Scientific Research (NWO) grant 600.063.310.10.
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JI Astron. Astrophys.
PD AUG
PY 2013
VL 556
AR A89
DI 10.1051/0004-6361/201220849
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SC Astronomy & Astrophysics
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UT WOS:000323893500089
ER
PT J
AU Zhang, Z
Gilfanov, M
Bogdan, A
AF Zhang, Z.
Gilfanov, M.
Bogdan, A.
TI Low-mass X-ray binary populations in galaxy outskirts: Globular clusters
and supernova kicks
SO ASTRONOMY & ASTROPHYSICS
LA English
DT Article
DE X-rays: binaries; globular clusters: general; Galaxy: halo; supernovae:
general
ID NEARBY EARLY-TYPE; VIRGO-CLUSTER; LUMINOSITY FUNCTIONS; RADIO PULSARS;
HOST GALAXY; SYSTEMS; CHANDRA; ENVIRONMENT; CONNECTION; EMISSION
AB For the first time, we have systematically explored the population of discrete X-ray sources in the outskirts of early-type galaxies. Based on a broad sample of 20 galaxies observed with Chandra we detected overdensity of X-ray sources in their outskirts. The overdensity appears as halos of resolved sources around the galaxies. These halos are broader than stellar light, extending out to at least similar to 10r(e) (r(e) is the effective radius). These halos are composed of sources fainter than similar to 5 x 10(38) erg/s, whereas the more luminous sources appear to follow the distribution of the stellar light, suggesting that the excess source population consists of neutron star binaries. Dividing the galaxy sample into four groups according to their stellar mass and specific frequency of globular clusters (GCs), we find that the extended halos are present in all groups except for the low-mass galaxies with low GC content. We propose that the extended halos may be comprised of two independent components, low-mass X-ray binaries (LMXBs) located in GCs, which are known to have a wider distribution than the stellar light, and neutron star LMXBs kicked out of the main body of the parent galaxy by supernova explosions. The available deep optical and X-ray data of NGC 4365 support this conclusion. For this galaxy we identified 60.1 +/- 10.8 excess sources in the (4-10)r(e) region of which similar to 40% are located in GCs, whereas similar to 60% are field LMXBs. We interpret the latter as kicked neutron star LMXBs. We discuss the implications of these results for the natal kick distributions of black holes and neutron stars.
C1 [Zhang, Z.; Gilfanov, M.] Max Planck Inst Astrophys, D-85741 Garching, Germany.
[Gilfanov, M.] Russian Acad Sci, Space Res Inst, Moscow 117997, Russia.
[Bogdan, A.] Smithsonian Astrophys Observ, Cambridge, MA 02138 USA.
RP Zhang, Z (reprint author), Max Planck Inst Astrophys, Karl Schwarzschild Str 1, D-85741 Garching, Germany.
EM zzhang@mpa-garching.mpg.de; gilfanov@mpa-garching.mpg.de
FU NASA [PF1-120081, NAS8-03060]; Chandra X-ray Center
FX We thank Andrew Cooper, Diederik Kruijssen, and Jingying Wang for
discussions which have improved this paper. We thank Klaus Dolag for the
discussion of the intracluster light in clusters of galaxies. This
research has made use of Chandra archival data provided by Chandra X-ray
Center, and 2MASS Large Galaxy Atlas data provided by NASA/IPAC infrared
science archive. Akos Bogdan acknowledges support provided by NASA
through Einstein Postdoctoral Fellowship grant number PF1-120081 awarded
by the Chandra X-ray Center, which is operated by the Smithsonian
Astrophysical Observatory for NASA under contract NAS8-03060.
NR 57
TC 3
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U1 0
U2 2
PU EDP SCIENCES S A
PI LES ULIS CEDEX A
PA 17, AVE DU HOGGAR, PA COURTABOEUF, BP 112, F-91944 LES ULIS CEDEX A,
FRANCE
SN 0004-6361
J9 ASTRON ASTROPHYS
JI Astron. Astrophys.
PD AUG
PY 2013
VL 556
AR A9
DI 10.1051/0004-6361/201220685
PG 10
WC Astronomy & Astrophysics
SC Astronomy & Astrophysics
GA 211GH
UT WOS:000323893500009
ER
PT J
AU Caldwell, L
Bakker, VJ
Sillett, TS
Desrosiers, MA
Morrison, SA
Angeloni, LM
AF Caldwell, Luke
Bakker, Victoria J.
Sillett, T. Scott
Desrosiers, Michelle A.
Morrison, Scott A.
Angeloni, Lisa M.
TI REPRODUCTIVE ECOLOGY OF THE ISLAND SCRUB-JAY
SO CONDOR
LA English
DT Article
DE Aphelocoma insularis; California; habitat-specific demography; nest
survival; observer effects; reproductive ecology; Santa Cruz Island
ID SANTA-CRUZ ISLAND; NEST-SITE SELECTION; TERRITORY SIZE;
APHELOCOMA-INSULARIS; SWAINSONS WARBLERS; HABITAT STRUCTURE;
POPULATION-SIZE; SONGBIRD NESTS; PREDATION RISK; SUCCESS
AB We investigated the reproductive ecology of the Island Scrub-Jay (Aphelocoma insularis), which is endemic to Santa Cruz Island, California, and is a species of conservation concern. We documented daily nest survival, probability of renesting, annual fledging success, and breeding behavior, and determined how these factors varied in relation to the habitat characteristics of the jays' home ranges. Clutch sizes, feeding rates, and nest attendance were not correlated with chaparral cover or with home-range size. In contrast, nest predation, which accounted for 92% of documented nest failures, was less likely at nests that were more concealed, at nests of breeding pairs with home ranges that were smaller and had a greater proportion of taller vegetation, and at nests that were initiated earlier in the breeding season. Researchers' activity near nests increased the likelihood of predation, although the effect diminished with a nest's age. Despite relatively low nest survival, the high frequency of renesting allowed pairs to fledge an average of 1.1 +/- 0.1 young per year, or 1.8 +/- 0.2 young after the effects of the observer were accounted for. Currently, chaparral habitats on Santa Cruz Island are regenerating following the removal of exotic herbivores. This regeneration could in turn increase and improve breeding habitat for this island endemic.
C1 [Caldwell, Luke; Desrosiers, Michelle A.; Angeloni, Lisa M.] Colorado State Univ, Dept Biol, Ft Collins, CO 80523 USA.
[Bakker, Victoria J.; Sillett, T. Scott] Natl Zool Pk, Smithsonian Conservat Biol Inst, Migratory Bird Ctr, Washington, DC 20013 USA.
[Morrison, Scott A.] Nature Conservancy, San Francisco, CA 94105 USA.
RP Caldwell, L (reprint author), Colorado State Univ, Dept Biol, Ft Collins, CO 80523 USA.
EM lukecaldwell@hotmail.com
FU Nature Conservancy; Channel Islands National Park; University of
California's Santa Cruz Island Reserve; Smithsonian Institution;
Colorado State University
FX We thank The Nature Conservancy, Channel Islands National Park, and the
University of California's Santa Cruz Island Reserve for support of the
Island Scrub-Jay Conservation Initiative. This work was done at the
University of California Natural Reserve System's Santa Cruz Island
Reserve on property owned and managed by The Nature Conservancy. Karl
Bardon, Sinead Borchert, Jenelle Dowling, Ben Griffith, Eileen Muller,
Kyle Pias, and Anna Potter provided excellent assistance in the field.
We are grateful to Mika Altfeld, Christina Boser, Reed Bowman, Walter
Boyce, Kate Faulkner, John Fitzpatrick, Cameron Ghalambor, Brian
Guerrero, Kathryn Langin, Lyndal Laughrin, Mario Pesendorfer, Helen
Sofaer, Jerre Stallcup, Lotus Vermeer, and Winston Vickers for advice
and logistical support, and to Brian Cohen for the map figures. We also
thank Robert Curry and Claire Curry for perceptive comments that
improved this paper. Funding was provided by The Nature Conservancy, the
Smithsonian Institution, Channel Islands National Park, and Colorado
State University.
NR 62
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U1 3
U2 43
PU COOPER ORNITHOLOGICAL SOC
PI LAWRENCE
PA ORNITHOLOGICAL SOC NORTH AMER PO BOX 1897, LAWRENCE, KS 66044-8897 USA
SN 0010-5422
J9 CONDOR
JI Condor
PD AUG
PY 2013
VL 115
IS 3
BP 603
EP 613
DI 10.1525/cond.2013.120028
PG 11
WC Ornithology
SC Zoology
GA 213TH
UT WOS:000324082600017
ER
PT J
AU Capper, A
Flewelling, LJ
Arthur, K
AF Capper, Angela
Flewelling, Leanne J.
Arthur, Karen
TI Dietary exposure to harmful algal bloom (HAB) toxins in the endangered
manatee (Trichechus manatus latirostris) and green sea turtle (Chelonia
mydas) in Florida, USA
SO HARMFUL ALGAE
LA English
DT Article
DE Brevetoxin; Okadaic acid; Saxitoxin; Lyngbyatoxin-A; Cyanobacteria;
Dinoflagellate
ID INDIAN RIVER LAGOON; CYANOBACTERIUM LYNGBYA-MAJUSCULA; RED TIDE
DINOFLAGELLATE; KARENIA-BREVIS; OKADAIC ACID; MARINE CYANOBACTERIUM;
SECONDARY METABOLITES; PYRODINIUM-BAHAMENSE; COASTAL WATERS; POTENTIAL
ROLE
AB Florida is a hotspot for cyano- and microalgal harmful algal blooms (HABs) with annual red-tide events off-shore and blooms of Lyngbya spp. commonly observed in both marine and freshwater environments. This region also provides extensive foraging habitat for large populations of herbivorous green turtles (Chelonia mydas) and manatees (Trichechus manatus latirostris). The exposure of aquatic organisms to HAB toxins is not well known and whilst acute exposures are better understood, the vulnerability of aquatic animals to chronic exposure from multiple HAB toxins over prolonged periods has rarely been addressed. This study aimed to identify the presence of toxic compounds produced by HAB species commonly found in Florida (brevetoxins, okadaic acid, saxitoxins and Lyngbya toxins) in tissues and gut samples from manatee and green sea turtles that stranded in Florida, USA. Muscle, liver and alimentary tract samples were opportunistically collected from 14 manatees and 13 green turtles that stranded on the Florida shoreline between December 2003 and February 2006. Samples from each animal were assessed for the presence of brevetoxin, okadaic acid, lyngbyatoxin-A and saxitoxin. Nine (64%) manatees and 11 (85%) turtles were found to have been exposed to one or more of the HAB toxins. Okadaic acid and saxitoxin were only found in alimentary tract samples, whereas brevetoxin was more widely distributed. No lyngbyatoxin-A was observed in any tissue samples. The majority of turtles (13) stranded on the Atlantic coast between St. Johns and Monroe counties, with one on the Gulf coast at Bay County, whereas nine manatees were stranded on the Gulf coast between Levy and Lee counties, with the remaining five between Volusia and Brevard counties on the Atlantic coast. This HAB toxin screen has identified that a large proportion of a random sample of turtles and manatees that stranded in Florida in 2003-2006 were exposed to HAB toxins. Most of the concentrations measured were low, and the toxins were directly linked to the death of only three of these animals. However, the presence of these compounds, and in some cases the presence of multiple HAB toxins in individual animals, indicates that turtles and manatees in Florida are exposed to deleterious compounds at sub-lethal levels in their environment, which could ultimately compromise their health. (C) 2013 Elsevier B.V. All rights reserved.
C1 [Capper, Angela] James Cook Univ, Sch Marine & Trop Biol, Townsville, Qld 4811, Australia.
[Capper, Angela] James Cook Univ, Ctr Sustainable Trop Fisheries & Aquaculture, Townsville, Qld 4811, Australia.
[Capper, Angela; Arthur, Karen] Smithsonian Marine Stn, Ft Pierce, FL 34949 USA.
[Flewelling, Leanne J.] Fish & Wildlife Res Inst, Florida Fish & Wildlife Conservat Commiss, St Petersburg, FL 33701 USA.
RP Capper, A (reprint author), James Cook Univ, Sch Marine & Trop Biol, Townsville, Qld 4811, Australia.
EM angela.capper@jcu.edu.au; Leanne.Flewelling@myfwc.com;
karen.arthur@anu.edu.au
RI CSTFA, ResearcherID/P-1067-2014;
OI Capper, Angela/0000-0002-4922-0253
FU Smithsonian Marine Station Fellowship; US Dept. of Commerce [NA05 NOS
4781194]; Florida Fish and Wildlife Conservation Commission
FX This research was funded by a Smithsonian Marine Station Fellowship to
A.C., Grant Number NA05 NOS 4781194 from the US Dept. of Commerce (DoC,
NOAA, ECOHAB programme) through UNC-CH, and the Florida Fish and
Wildlife Conservation Commission. The findings, opinions and
recommendations expressed in this publication are those of the authors
and not necessarily those of the DoC. The authors thank veterinarians
and staff at the Marine Mammal Pathobiology Laboratory and Karrie Minch
and staff at the Sea Turtle Stranding and Salvage Network for their
assistance with tissue acquisition and stranding data. Tissue collection
and analysis was carried out in accordance with Permit No. MA773494-8
for manatees and Marine Turtle Permit No. 105 for green sea turtles.
This is contribution 911 of the Smithsonian Marine Station, Fort Pierce,
Florida.
NR 109
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U1 10
U2 134
PU ELSEVIER SCIENCE BV
PI AMSTERDAM
PA PO BOX 211, 1000 AE AMSTERDAM, NETHERLANDS
SN 1568-9883
J9 HARMFUL ALGAE
JI Harmful Algae
PD AUG
PY 2013
VL 28
BP 1
EP 9
DI 10.1016/j.hal.2013.04.009
PG 9
WC Marine & Freshwater Biology
SC Marine & Freshwater Biology
GA 210WW
UT WOS:000323866800001
ER
PT J
AU Labandeira, CC
AF Labandeira, Conrad C.
TI A paleobiologic perspective on plant-insect interactions
SO CURRENT OPINION IN PLANT BIOLOGY
LA English
DT Review
ID LONG-PROBOSCID SCORPIONFLIES; NORTH-CENTRAL TEXAS; ARTHROPOD
ASSOCIATIONS; FOSSIL EVIDENCE; CLIMATE-CHANGE; EARLY HISTORY;
POLLINATION; HERBIVORY; ANGIOSPERMS; COEVOLUTION
AB Fossil plant-insect associations (PI As) such as herbivory and pollination have become increasingly relevant to paleobiology and biology. Researchers studying fossil PI As now employ procedures for assuring unbiased representation of field specimens, use of varied analytical quantitative techniques, and address ecological and evolutionarily important issues. For herbivory, the major developments are: Late Silurian-Middle Devonian (ca. 420-385 Ma(a)) origin of herbivory; Late Pennsylvanian (318-299 Ma) expansion of herbivory; Permian (299-252 Ma) herbivore colonization of new habitats; consequences of the end-Permian (252 Ma) global crisis; early Mesozoic (ca. 235-215 Ma) rediversification of plants and herbivores; end-Cretaceous (66.5 Ma) effects on extinction; and biological effects of the Paleocene-Eocene Thermal Maximum (PETM) (55.8 Ma). For pollination, salient issues include: Permian pollination evidence; the plant hosts of mid-Mesozoic (ca. 160-110 Ma) long-proboscid pollinators; and effect of the angiosperm revolution (ca. 125-90 Ma) on earlier pollinator relationships. Multispecies interaction studies, such as contrasting damage types with insect diversity and establishing robust food webs, expand the compass and relevance of past PIAs.
C1 [Labandeira, Conrad C.] Smithsonian Inst, Natl Museum Nat Hist, Dept Paleobiol, Washington, DC 20013 USA.
[Labandeira, Conrad C.] Rhodes Univ, Dept Geol, ZA-6140 Grahamstown, South Africa.
[Labandeira, Conrad C.] Capital Normal Univ, Coll Life Sci, Beijing 100048, Peoples R China.
[Labandeira, Conrad C.] Univ Maryland, Dept Entomol, College Pk, MD 20742 USA.
[Labandeira, Conrad C.] Univ Maryland, BEES Program, College Pk, MD 20742 USA.
RP Labandeira, CC (reprint author), Smithsonian Inst, Natl Museum Nat Hist, Dept Paleobiol, Washington, DC 20013 USA.
EM labandec@si.edu
FU [DEB-0919071]
FX I thank Beverley Glover and Pradeep Kachroo for an invitation to provide
this manuscript. Finnegan Marsh drafted and formatted the figures. Grant
DEB-0919071 to P. Wilf is acknowledged. This is Contribution 254 of the
Evolution of Terrestrial Ecosystem consortium at the National Museum of
Natural History, in Washington, DC.
NR 57
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U2 114
PU CURRENT BIOLOGY LTD
PI LONDON
PA 84 THEOBALDS RD, LONDON WC1X 8RR, ENGLAND
SN 1369-5266
EI 1879-0356
J9 CURR OPIN PLANT BIOL
JI Curr. Opin. Plant Biol.
PD AUG
PY 2013
VL 16
IS 4
BP 414
EP 421
DI 10.1016/j.pbi.2013.06.003
PG 8
WC Plant Sciences
SC Plant Sciences
GA 210XW
UT WOS:000323869400004
PM 23829938
ER
PT J
AU Davidson, TM
de Rivera, CE
Canton, JT
AF Davidson, Timothy M.
de Rivera, Catherine E.
Canton, James T.
TI Small increases in temperature exacerbate the erosive effects of a
non-native burrowing crustacean
SO JOURNAL OF EXPERIMENTAL MARINE BIOLOGY AND ECOLOGY
LA English
DT Article
DE Bioerosion; Burrowing isopod; Climate change; Ecosystem engineering;
Invasive species; Temperature effects
ID RECENT CLIMATE-CHANGE; SPHAEROMA-QUOIANUM; BORING CRUSTACEANS; WATER
TEMPERATURE; FOOD-WEB; MARINE; COMMUNITY; ECOSYSTEM; RESPONSES; PLASTICS
AB Increases in temperature associated with global climate change are predicted to elicit drastic changes, especially to marine and freshwater ecosystems. Even small changes in water temperature (1-2 degrees C) may alter rates of biological activity, with concomitant effects to communities and ecosystems. The biological erosion of marine habitats and structures is a rarely considered yet important activity that is likely to be influenced by changing ocean temperatures. We conducted an experiment to test how seawater temperature affects erosion by a non-native crustacean (Sphaeroma quoianum). Aquaria were maintained at one of thirteen temperatures (7.5 degrees C-25.2 degrees C). In each aquarium, twenty isopods were encaged with an expanded polystyrene foam block (800 ml) and left to burrow. Polystyrene floats under docks are often damaged by isopods in the field. After two months, isopods created the longest burrows in the moderate seawater temperatures (13.8 degrees C-18.3 degrees C); these temperatures were 1.1-5.6 degrees C higher than the mean ambient temperatures whence they came. Shorter burrows were observed for the coldest (7.5 degrees C) and warmest seawater treatments (25.2 degrees C). These results indicate that increasing seawater temperatures can exacerbate the bioerosive effects of non-native S. quoianum until a threshold, after which the impacts diminish. Because ocean temperatures are predicted to increase 1.5-2.6 degrees C in the next 90 years, our data suggest erosion by this non-native crustacean will increase 14.7-37.6% in Coos Bay/South Slough, Oregon (where isopods were collected). However, other invaded bays on the Pacific coast of North America may also experience mean increases of biological erosion of 6.6-29.8%. Since biological activity is tightly coupled with temperature in many species, we hypothesize that the biological erosion rates of other erosive species will also increase with rising water temperatures affecting marine habitats, communities, and structures. (C) 2013 Elsevier B.V. All rights reserved.
C1 [Davidson, Timothy M.; de Rivera, Catherine E.] Portland State Univ ESM, Dept Environm Sci & Management, Portland, OR 97207 USA.
[Canton, James T.] Williams Coll Myst Seaport, Maritime Studies Program, Mystic, CT 06355 USA.
RP Davidson, TM (reprint author), Smithsonian Trop Res Inst, Apartado Postal 0843-03092, Balboa, Ancon, Panama.
EM DavidsonT@si.edu; derivera@pdx.edu; James.T.Carlton@williams.edu
OI Davidson, Timothy/0000-0001-9535-7982
FU Estuarine Reserves Division, Office of Ocean and Coastal Resource
Management, National Ocean Service, National Oceanic and Atmospheric
Administration
FX We are grateful to Anne Phillip, Dereck Guba, and Justin Ashby for their
assistance during the experiment. Heejun Chang, Linda Mantel, Yangdong
Pan, Gregory Ruiz, Steven Rumrill, and Mark Sytsma provided helpful
advice and comments. We thank Elise Granek for her advice and for
allowing the use of equipment We also thank the anonymous reviewers for
their comments on this manuscript. This research was conducted in the
National Estuarine Research Reserve System under an award from the
Estuarine Reserves Division, Office of Ocean and Coastal Resource
Management, National Ocean Service, National Oceanic and Atmospheric
Administration.
NR 53
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PU ELSEVIER SCIENCE BV
PI AMSTERDAM
PA PO BOX 211, 1000 AE AMSTERDAM, NETHERLANDS
SN 0022-0981
J9 J EXP MAR BIOL ECOL
JI J. Exp. Mar. Biol. Ecol.
PD AUG
PY 2013
VL 446
BP 115
EP 121
DI 10.1016/j.jembe.2013.05.008
PG 7
WC Ecology; Marine & Freshwater Biology
SC Environmental Sciences & Ecology; Marine & Freshwater Biology
GA 201JZ
UT WOS:000323139200016
ER
PT J
AU Yarrington, CS
Tyler, AC
Altieri, AH
AF Yarrington, Charles S.
Tyler, Anna Christina
Altieri, Andrew H.
TI Do snails facilitate bloom-forming macroalgae in a eutrophic estuary?
SO JOURNAL OF EXPERIMENTAL MARINE BIOLOGY AND ECOLOGY
LA English
DT Article
DE Eutrophication; Feedbacks; Herbivory; Indirect effects; Macroalgal
bloom; Nutrient cycling
ID ILYANASSA-OBSOLETA SAY; TEMPERATE COASTAL LAGOON; MARINE ECOSYSTEMS; MUD
SNAIL; NUTRIENT REGENERATION; RELATIVE IMPORTANCE; SHALLOW ESTUARIES;
GROWTH; NITROGEN; COMMUNITY
AB Blooms of macroalgae are one of the most visible and problematic results of eutrophication-driven estuarine degradation because they can smother seagrass, obstruct fishing, and close beaches to tourism. Not surprisingly, high densities of herbivores are commonly associated with these blooms. Invertebrates in other systems can facilitate macrophyte growth under equilibrium conditions by releasing nutrients or reducing competitors. Based on laboratory experiments it has been suggested that the omnivorous snail Ilyanassa obsoleta likewise facilitates bloom-forming macroalgae in estuaries of the Northeastern US. If snails enhance macroalgal blooms as suggested, it would have broad implications for nutrient retention and cycling in estuaries. We tested whether snails actually do facilitate macroalgal blooms in a natural setting through community surveys, laboratory incubations, and field experiments. We confirmed in our surveys that snail densities were positively correlated with macroalgal biomass, and in laboratory incubations that snail excreta enhanced macroalgal growth and that snail activity mobilized sediment nutrients and enhanced sediment-water column coupling. Snails thus have the potential to influence nutrient recycling and retention. However, snails did not facilitate macroalgal growth in our field manipulations of snails and bloom-forming macroalgae along an estuarine eutrophication gradient. Macroalgal growth in our experiment was highly variable across the estuarine gradient and through the growing season, suggesting that large-scale variation in physical factors such as nutrients, light, or temperature plays the dominant role in limiting macroalgal blooms. The departure of our field results from predictions of laboratory studies reinforces previous warnings that laboratory experiments can be useful tools for elucidating mechanisms that drive field patterns, but are not a substitute for field experiments where they are possible. While snails do not appear to directly influence macroalgal growth, we suggest that the potential influence of snails on benthic metabolism and nutrient cycling demands further investigation in the field. (C) 2013 Elsevier B.V. All rights reserved.
C1 [Yarrington, Charles S.; Tyler, Anna Christina] Rochester Inst Technol, Coll Sci, Gosnell Sch Life Sci, Rochester, NY 14623 USA.
[Altieri, Andrew H.] Smithsonian Trop Res Inst, Balboa, Ancon, Panama.
RP Tyler, AC (reprint author), Rochester Inst Technol, Coll Sci, Gosnell Sch Life Sci, 85 Lomb Mem Dr, Rochester, NY 14623 USA.
EM actsbi@rit.edu
FU National Science Foundation [OCE 0727642]
FX We thank E. Hane, H. Pough and two anonymous reviewers for their helpful
comments that improved the manuscript A. Giblin, K. Foreman, R. Marino,
R. Howarth and M. Hayn provided logistical support in Woods Hole. B.
Bourdon, M. Bida, N. McLenaghan, C. Scheiner, J. Barnette, and A. Abdul
Rahman provided invaluable assistance in the field and laboratory.
Funding for this work was provided by the National Science Foundation
grant number OCE 0727642 to A.C.T. [ST]
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PU ELSEVIER SCIENCE BV
PI AMSTERDAM
PA PO BOX 211, 1000 AE AMSTERDAM, NETHERLANDS
SN 0022-0981
J9 J EXP MAR BIOL ECOL
JI J. Exp. Mar. Biol. Ecol.
PD AUG
PY 2013
VL 446
BP 253
EP 261
DI 10.1016/j.jembe.2013.05.019
PG 9
WC Ecology; Marine & Freshwater Biology
SC Environmental Sciences & Ecology; Marine & Freshwater Biology
GA 201JZ
UT WOS:000323139200032
ER
PT J
AU Long, WC
Sellers, AJ
Hines, AH
AF Long, W. Christopher
Sellers, Andrew J.
Hines, Anson H.
TI Mechanism by which coarse woody debris affects predation and community
structure in Chesapeake Bay
SO JOURNAL OF EXPERIMENTAL MARINE BIOLOGY AND ECOLOGY
LA English
DT Article
DE Blue crab; Coarse woody debris; Community structure; Grass shrimp;
Mummichog; Predation
ID HABITAT COMPLEXITY; FORAGING SUCCESS; TEMPORAL VARIATION; SHALLOW-WATER;
FISH HABITAT; BLUE CRABS; FOOD-WEB; STREAM; RIVER; REFUGE
AB Coarse woody debris (CWD) provides a structured habitat in aquatic systems. It is associated with a higher abundance, diversity, and productivity of aquatic animals and can provide a shelter from physical stressors and predation. We investigated the effects of CWD on predation risk and community structure in two field experiments in the Rhode River, Chesapeake Bay. In the first experiment we assessed the effects of the orientation (horizontal or vertical) and complexity (simple or crossed) of CWD, and in the second experiment we investigated the effects of interstitial space (ISS). We measured predation risk in a tethering experiment for three species in each experiment: juvenile blue crab, Callinectes sapidus; mummichog (a type of killifish), Fundulus heteroditus; and grass shrimp, Palaemonetes pugio. These three species are common in nearshore Chesapeake Bay habitats but differ in their size and habitat use, allowing for a holistic examination of the function of CWD. At the end of the experiments, the benthic community inhabiting the CWD was sampled. By interpreting the community data in light of the predation experiments we were able to examine how the structural characteristics of the CWD affected predation to shape the benthic community. In the first experiment, lowest predation was experienced by blue crabs at the treatments with high complexity at the sediment surface, by mummichogs at all CWD treatments relative to control plots, and by grass shrimp in horizontally oriented treatments. In the second experiment, lowest predation was experienced by blue crabs at moderate to high ISSs, by mummichogs at intermediate ISSs, and by grass shrimp at low and high ISSs. Predation rates for each experimental species could be predicted by the size of the prey, and by both the size of their predators and the size of species that prey on the predators relative to the ISS of the structure. Community structure differed among treatments in both experiments and appeared to be driven primarily by predation risk; species whose predators were in high abundance in a treatment were less abundant themselves. This work demonstrates the importance of CWD and of wooded shorelines as important habitat for both economically and ecologically important species. It also highlights the importance of top-down forcing in the small scale community dynamics of these near-shore habitats. Published by Elsevier B.V.
C1 [Long, W. Christopher; Sellers, Andrew J.; Hines, Anson H.] Smithsonian Environm Res Ctr, Edgewater, MD 21037 USA.
RP Long, WC (reprint author), NOAA, Kodiak Lab, Resource Assessment & Conservat Engn Div, Alaska Fisheries Sci Ctr,Natl Marine Fisheries Se, 301 Res Ct, Kodiak, AK 99615 USA.
EM chris.long@noaa.gov
RI Long, William/C-7074-2009
OI Long, William/0000-0002-7095-1245
FU Marine Science Network Fellowship from the Smithsonian Institution; NOAA
grant through the Blue Crab Advanced Research Consortium; NSF Grant for
Research Experience for Undergraduates
FX We thank Lela Schlenker, Laila Melendez, Paige Roberts, Margaret Kramer,
and the other members of the Smithsonian Environmental Research Center
crab lab for the help with field and laboratory work, the SERC invasions
lab for shrimp tethering lessons, and Robert Aguilar for the help in
identifying fish and running statistics. WCL was supported by a Marine
Science Network Fellowship from the Smithsonian Institution and AS was
supported by an Internship funded by NOAA grant through the Blue Crab
Advanced Research Consortium to AHH and NSF Grant for Research
Experience for Undergraduates. Comments from Jordana Long, Ben Daily,
Frank Morado, Robert Foy, and two anonymous reviewers substantially
improved previous versions of the manuscript. The findings and
conclusions in the paper are those of the authors and do not necessarily
represent the views of the National Marine Fisheries Service, NOAA. [ST]
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PA PO BOX 211, 1000 AE AMSTERDAM, NETHERLANDS
SN 0022-0981
J9 J EXP MAR BIOL ECOL
JI J. Exp. Mar. Biol. Ecol.
PD AUG
PY 2013
VL 446
BP 297
EP 305
DI 10.1016/j.jembe.2013.05.021
PG 9
WC Ecology; Marine & Freshwater Biology
SC Environmental Sciences & Ecology; Marine & Freshwater Biology
GA 201JZ
UT WOS:000323139200037
ER
PT J
AU Moreiras, S
Marsh, E
Nami, H
Estrella, D
Duran, V
AF Moreiras, Stella
Marsh, Erik
Nami, Hugo
Estrella, Diego
Duran, Victor
TI Holocene geomorphology, tectonics, and archaeology in Barrancas, arid
Central Andes piedmont (33 degrees S)
SO APPLIED GEOGRAPHY
LA English
DT Article
DE Tectonics; Lagoons; Badlands; Archaeological site formation processes;
Argentina
ID LATE PLEISTOCENE; ARGENTINA; MENDOZA; EXCURSION
AB Archaeology and geomorphology are closely linked in Barrancas, Argentina, where both disciplines are necessary to understand human environment interactions during the Holocene. The geomorphology suggests that the area was located in a distal alluvial environment of the Zonda paleo-river that drained to the east. Active tectonics during the Pliocene-Early Pleistocene caused the gradual uplift of the Lunlunta Sierras to the southwest, which led to the bifurcation of the paleo-river. For most of the Holocene, the area was seasonally flooded, suggesting a lacustrine microenvironment A long record of human occupation beginning in the Early Holocene suggests an extended period of intimate human environment interactions. Recently, the environment has shifted dramatically. Erosion has created a badlands and significantly impacted the archaeological record. Understanding geomorphological processes is central for archaeological research in general, and especially in Barrancas. This research is an integral part of the ongoing community archaeology program in the area, and for the planned creation of an archaeological reserve. (C) 2013 Elsevier Ltd. All rights reserved.
C1 [Moreiras, Stella] Consejo Nacl Invest Cient & Tecn, IANIGLA, CCT Mendoza, Mendoza, Argentina.
[Marsh, Erik] UNCuyo, Lab Paleo Ecol Humana, Mendoza, Argentina.
[Nami, Hugo] Consejo Nacl Invest Cient & Tecn, IGEBA, Dpto Ciencias Geol, FCEN,UBA,CABA, RA-1033 Buenos Aires, DF, Argentina.
[Nami, Hugo] Smithsonian Inst, Natl Museum Nat Hist, Washington, DC 20560 USA.
[Estrella, Diego] UNCuyo, Fac Filosofia & Letras, Lab Geoarqueol, Mendoza, Argentina.
[Duran, Victor] UNCuyo, CONICET, Lab Geoarqueol, Mendoza, Argentina.
RP Moreiras, S (reprint author), Consejo Nacl Invest Cient & Tecn, IANIGLA, CCT Mendoza, Mendoza, Argentina.
EM moreiras@mendoza-conicet.gob.ar; erik.marsh@gmail.com;
hgnami@fullbrightmail.org; uzphaestar@gmail.com;
duranvic@logos.uncu.edu.ar
NR 50
TC 2
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U1 1
U2 5
PU ELSEVIER SCI LTD
PI OXFORD
PA THE BOULEVARD, LANGFORD LANE, KIDLINGTON, OXFORD OX5 1GB, OXON, ENGLAND
SN 0143-6228
J9 APPL GEOGR
JI Appl. Geogr.
PD AUG
PY 2013
VL 42
BP 217
EP 226
DI 10.1016/j.apgeog.2013.04.005
PG 10
WC Geography
SC Geography
GA 204IX
UT WOS:000323360100022
ER
PT J
AU Sargis, EJ
Woodman, N
Morningstar, NC
Reese, AT
Olson, LE
AF Sargis, Eric J.
Woodman, Neal
Morningstar, Natalie C.
Reese, Aspen T.
Olson, Link E.
TI Morphological distinctiveness of Javan Tupaia hypochrysa (Scandentia,
Tupaiidae)
SO JOURNAL OF MAMMALOGY
LA English
DT Article
DE cranium; digits; hand; mandible; manus; postcranium; rays; skeleton;
skull; treeshrews
ID TREE SHREWS; PHYLOGENETIC IMPLICATIONS; FUNCTIONAL-MORPHOLOGY;
TREESHREWS MAMMALIA; SORICIDAE; BOUNDARIES; HIGHLANDS; GUATEMALA;
CRYPTOTIS; SKULL
AB The common treeshrew, Tupaia glis, represents a species complex with a complicated taxonomic history. It is distributed mostly south of the Isthmus of Kra on the Malay Peninsula and surrounding islands. In our recent revision of a portion of this species complex, we did not fully assess the population from Java (T. "glis" hypochrysa) because of our limited sample. Herein, we revisit this taxon using multivariate analyses in comparisons with T. glis, T. chrysogaster of the Mentawai Islands, and T. ferruginea from Sumatra. Analyses of both the manus and skull of Javan T. "glis" hypochrysa show it to be most similar to T. chrysogaster and distinct from both T. glis and T. ferruginea. Yet, the Javan population and T. chrysogaster have different mammae counts, supporting recognition of T. hypochrysa as a distinct species. The change in taxonomic status of T. hypochrysa has conservation implications for both T. glis and this Javan endemic.
C1 [Sargis, Eric J.; Morningstar, Natalie C.] Yale Univ, Dept Anthropol, New Haven, CT 06520 USA.
[Sargis, Eric J.; Reese, Aspen T.] Yale Univ, Dept Ecol & Evolutionary Biol, New Haven, CT 06520 USA.
[Sargis, Eric J.; Reese, Aspen T.] Yale Peabody Museum Nat Hist, Div Vertebrate Zool, New Haven, CT 06520 USA.
[Woodman, Neal] Smithsonian Inst, Natl Museum Nat Hist, Patuxent Wildlife Res Ctr, US Geol Survey, Washington, DC 20013 USA.
[Olson, Link E.] Univ Alaska Fairbanks, Univ Alaska Museum, Fairbanks, AK 99775 USA.
RP Sargis, EJ (reprint author), Yale Univ, Dept Anthropol, POB 208277, New Haven, CT 06520 USA.
EM eric.sargis@yale.edu
OI Woodman, Neal/0000-0003-2689-7373
FU National Science Foundation [DEB-0542532/0542725]; Alaska EPSCoR grant;
United States Geological Survey's Patuxent Wildlife Research Center;
Yale Peabody Museum of Natural History Summer Internship Program
FX This research was supported by National Science Foundation grant
DEB-0542532/0542725 and an Alaska EPSCoR grant to EJS and LEO.
Additional support was provided to NW from the United States Geological
Survey's Patuxent Wildlife Research Center and to NCM from the Yale
Peabody Museum of Natural History Summer Internship Program. We thank
the following curators, collection managers, and museums for access to
the specimens in their collections: E. Westwig, D. Lunde, and R. Voss,
AMNH, New York; R. Portela-Miguez, L. Tomsett, and P. Jenkins, BMNH,
London; B. Stanley and L. Heaney, Field Museum of Natural History
(FMNH), Chicago; J. Dines, Los Angeles County Museum of Natural History,
Los Angeles (LACM); J. Chupasko and M. Omura, Museum of Comparative
Zoology at Harvard University (MCZ), Cambridge, Massachusetts; C. Conroy
and J. Patton, Museum of Vertebrate Zoology at University of California,
Berkeley (MVZ); R. Winkler, Naturhistorisches Museum Basel (NMB); B.
Herzig, A. Bibl, A. Gamauf, Naturhistorisches Museum Wien, Vienna (NMW);
H. van Grouw, Nationaal Natuurhistorisch Museum, Leiden (RMNH); L.
Gordon, R. Thorington, K. Helgen, and D. Lunde, USNM, Washington, DC; R.
Angermann and F. Mayer, Museum fur Naturkunde (ZMB), Berlin; and M.
Anderson, Zoologisk Museum University of Copenhagen (ZMUC). We are
grateful to S. Raredon, Division of Fishes, Museum Support Center, USNM,
for assistance with the digital X-ray system, and to R. Portela-Miguez,
Department of Zoology, BMNH, for providing X-rays of the 2 BMNH T.
hypochrysa specimens. We thank E. Meijaard and an anonymous reviewer for
comments that improved the manuscript. Any use of trade, product, or
firm names is for descriptive purposes only and does not imply
endorsement by the United States government.
NR 33
TC 5
Z9 5
U1 0
U2 8
PU ALLIANCE COMMUNICATIONS GROUP DIVISION ALLEN PRESS
PI LAWRENCE
PA 810 EAST 10TH STREET, LAWRENCE, KS 66044 USA
SN 0022-2372
J9 J MAMMAL
JI J. Mammal.
PD AUG
PY 2013
VL 94
IS 4
BP 938
EP 947
DI 10.1644/13-MAMM-A-042.1
PG 10
WC Zoology
SC Zoology
GA 206OS
UT WOS:000323532600018
ER
PT J
AU Sedio, BE
Paul, JR
Taylor, CM
Dick, CW
AF Sedio, Brian E.
Paul, John R.
Taylor, Charlotte M.
Dick, Christopher W.
TI Fine-scale niche structure of Neotropical forests reflects a legacy of
the Great American Biotic Interchange
SO NATURE COMMUNICATIONS
LA English
DT Article
ID TROPICAL FORESTS; SPECIES COEXISTENCE; ADAPTIVE EVOLUTION; PLANT
DIVERSITY; ANDEAN UPLIFT; COMMUNITY; DISPERSAL; PHYLOGENY; RUBIACEAE;
PATTERNS
AB The tendency of species to retain their ancestral niches may link processes that determine community assembly with biogeographic histories that span geological time scales. Biogeographic history is likely to have had a particularly strong impact on Neotropical forests because of the influence of the Great American Biotic Interchange, which followed emergence of a land connection between North and South America similar to 3 Ma. Here we examine the community structure, ancestral niches and ancestral distributions of the related, hyperdiverse woody plant genera Psychotria and Palicourea (Rubiaceae) in Panama. We find that 49% of the variation in hydraulic traits, a strong determinant of community structure, is explained by species' origins in climatically distinct biogeographic regions. Niche evolution models for a regional sample of 152 species indicate that ancestral climatic niches are associated with species' habitat distributions, and hence local community structure and composition, even millions of years after dispersal into new geographic regions.
C1 [Sedio, Brian E.; Dick, Christopher W.] Univ Michigan, Dept Ecol & Evolutionary Biol, Ann Arbor, MI 49109 USA.
[Paul, John R.] Colorado State Univ, Dept Biol, Ft Collins, CO 80523 USA.
[Taylor, Charlotte M.] Missouri Bot Garden, St Louis, MO 63166 USA.
[Dick, Christopher W.] Smithsonian Trop Res Inst, Balboa, Ancon, Panama.
RP Sedio, BE (reprint author), Univ Michigan, Dept Ecol & Evolutionary Biol, 830 N Univ, Ann Arbor, MI 49109 USA.
EM bsedio@umich.edu
FU NSF [DEB 1010816]
FX We thank R. Magill, R. Foster and the Environmental and Conservation
Program of the Field Museum, as well as D. Lorence and the National
Tropical Botanical Garden whose botanical collections made this study
possible. We also thank A. King, S. Smith, D. Goldberg, J. Wright, J.
Bemmels, the Angert Lab and the University of Michigan Plant Ecology
Discussion Group for intellectual input, the Smithsonian Tropical
Research Institute for support of the original fieldwork on Barro
Colorado Island and J. Megahan for assistance with the artwork. This
study was facilitated by the support of NSF DEB 1010816 and an NSF
Graduate Research Fellowship to B.E.S.
NR 45
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U1 5
U2 50
PU NATURE PUBLISHING GROUP
PI LONDON
PA MACMILLAN BUILDING, 4 CRINAN ST, LONDON N1 9XW, ENGLAND
SN 2041-1723
J9 NAT COMMUN
JI Nat. Commun.
PD AUG
PY 2013
VL 4
AR 2317
DI 10.1038/ncomms3317
PG 8
WC Multidisciplinary Sciences
SC Science & Technology - Other Topics
GA 209JQ
UT WOS:000323752300002
PM 23939338
ER
PT J
AU Hirsch, BT
Tujague, MP
Di Blanco, YE
Di Bitetti, MS
Janson, CH
AF Hirsch, Ben T.
Tujague, Maria P.
Di Blanco, Yamil E.
Di Bitetti, Mario S.
Janson, Charles H.
TI Comparing capuchins and coatis: causes and consequences of differing
movement ecology in two sympatric mammals
SO ANIMAL BEHAVIOUR
LA English
DT Article
DE animal movement; capuchin; Cebus apella nigritus; coati; foraging; Nasua
nasua; straightness index; trapline; travel behaviour; travel cost
ID CEBUS-APELLA-NIGRITUS; GROUP SPATIAL POSITION; HOME-RANGE USE;
NASUA-NASUA; BEHAVIORAL ECOLOGY; MULTIPLE NUTRIENTS; VIGILANCE BEHAVIOR;
FEEDING ECOLOGY; FOOD DETECTION; TRAVEL SPEED
AB The mechanisms that shape animal movement decisions at the level of an individual or a group of animals can scale up to affect larger-scale ecological processes. Ecologists often use mechanistic animal movement models to understand these links, but animal movement models rarely connect empirically with an understanding of how animals actually decide to move around in their environment. To better understand this relationship, we compared the travel behaviour of two sympatric mammal species that have broadly similar diets: brown capuchin monkeys, Cebus apella nigritus, and ring-tailed coatis, Nasua nasua. According to most mechanistic animal movement models, species that exploit the same resources should show similar movement patterns. Although the fruit component of coati and capuchin diets is very similar, coatis primarily feed on invertebrates in the leaf litter or soil, while capuchins forage on invertebrate prey in the forest canopy. We found that these two species showed markedly different movement patterns: while capuchins typically travelled between fruit trees in relatively straight lines, coatis had significantly more tortuous daily travel paths and frequently visited the same fruit trees more than once per day. These circular coati travel paths would not be predicted by most foraging models. We posit that these differences in coati and capuchin movement patterns are driven by differences in arboreal and terrestrial travel costs, exploitation of fallen fruits and shifts in foraging behaviour over the course of the day. Because these seemingly small differences between the two species lead to major differences in movement behaviour, we posit that animal movement models need to better incorporate (1) travel costs, (2) both directed travel and random food search and (3) realistic diet models that include resources with different nutrient compositions. (C) 2013 The Association for the Study of Animal Behaviour. Published by Elsevier Ltd. All rights reserved.
C1 [Hirsch, Ben T.] Smithsonian Trop Res Inst, Balboa, Panama.
[Hirsch, Ben T.] Ohio State Univ, Sch Environm & Nat Resources, Columbus, OH 43210 USA.
[Tujague, Maria P.] Univ Nacl La Plata, Fac Ciencias Nat & Museo, CONICET, Natl Res Council, La Plata, Buenos Aires, Argentina.
[Tujague, Maria P.; Di Blanco, Yamil E.; Di Bitetti, Mario S.] Univ Nacl Misiones, CONICET, Natl Res Council, Inst Biol Subtrop,Fac Ciencias Forestales, Puerto Iguazu, Misiones, Argentina.
[Tujague, Maria P.; Di Blanco, Yamil E.; Di Bitetti, Mario S.] Asociac Civil Ctr Invest Bosque Atlantico CeIBA, Puerto Iguazu, Misiones, Argentina.
[Janson, Charles H.] Univ Montana, Div Biol Sci, Missoula, MT 59812 USA.
RP Hirsch, BT (reprint author), Ohio State Univ, Sch Environm & Nat Resources, 2021 Coffey Rd, Columbus, OH 43210 USA.
EM hirschb@si.edu
FU National Science Fund [BCS-0314525, BNS-9009023]; Argentine Research
Council (CONICET); Idea Wild; American Society of Mammalogists;
Fullbright
FX We thank Alex Alcocer Aldunate, Ana Alvarez, Maria Celia Baldovino,
Maria Veronica Cifre, Santiago Escobar, Carolina Ferrari, Emanuel
Galetto, Elizabeth Gonzales Valentin, Rosalyn Johnson, Daniel
Lambruschi, Luis Molina, Viviana Munoz, Juan Pablo Peretti, Noelia
Rivas, Taylor Rubin, Fermino Silva and Mauro Tammone for help and
assistance during the course of the field work. This paper has benefited
tremendously thanks to comments by Margaret Crofoot, Esteban
Fernandez-Juricic and two anonymous referees. We thank the
Administracion de Parques Nacionales (APN) for permission to carry out
work in Iguaz. This study was funded in part by National Science Fund
grants (BCS-0314525 and BNS-9009023) to C.H.J. and B. T. H., an
Argentine Research Council (CONICET) dissertation fellowship to M. P.
T., grants from Idea Wild and American Society of Mammalogists to M. P.
T., and a Fullbright to C.H.J.
NR 68
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U1 3
U2 49
PU ACADEMIC PRESS LTD- ELSEVIER SCIENCE LTD
PI LONDON
PA 24-28 OVAL RD, LONDON NW1 7DX, ENGLAND
SN 0003-3472
J9 ANIM BEHAV
JI Anim. Behav.
PD AUG
PY 2013
VL 86
IS 2
BP 331
EP 338
PG 8
WC Behavioral Sciences; Zoology
SC Behavioral Sciences; Zoology
GA 201XE
UT WOS:000323175500014
ER
PT J
AU Ballentine, B
Horton, B
Brown, ET
Greenberg, R
AF Ballentine, Barbara
Horton, Brent
Brown, E. Tracy
Greenberg, Russell
TI Divergent selection on bill morphology contributes to nonrandom mating
between swamp sparrow subspecies
SO ANIMAL BEHAVIOUR
LA English
DT Article
DE behaviour; Melospiza georgiana; morphological evolution; speciation;
swamp sparrow
ID MALE BIRD SONG; DARWINS FINCHES; FEMALE RESPONSE; ECOLOGICAL SPECIATION;
ACOUSTIC ADAPTATION; MELOSPIZA-GEORGIANA; MITOCHONDRIAL-DNA;
NATURAL-SELECTION; SEXUAL SELECTION; MARSH SPARROWS
AB Traits subject to ecologically based divergent selection that also affect nonrandom mating (i.e. 'magic traits') may hasten incipient speciation. In this study, we investigated whether nonrandom mating results from ecological divergence between swamp sparrow, Melospiza georgiana, subspecies. As a by-product of adaptive divergence in bill morphology between populations of swamp sparrows, there is a corresponding divergence in features of song shown to be salient to females, potentially providing a mechanism of reproductive isolation. Thus, female mating preferences for song could result in prezygotic isolation that prevents gene flow between subspecies. In this study we tested the hypothesis that female preferences for song provide a mechanism of reproductive isolation that limits gene flow between subspecies. Using copulation solicitation assays, we found that female coastal plain swamp sparrows showed a significant preference for consubspecific songs over heterosubspecific songs. We further tested whether mating preferences in coastal populations explain observed differences in song between subspecies. We found evidence that mating preferences in coastal females may explain the evolution of some acoustic features of song. We suggest that the bill may be an example of a 'magic trait' that contributes to continued divergence of swamp sparrow subspecies. (C) 2013 The Association for the Study of Animal Behaviour. Published by Elsevier Ltd. All rights reserved.
C1 [Ballentine, Barbara] Univ West Georgia, Dept Biol, Carrollton, GA USA.
[Ballentine, Barbara; Horton, Brent; Brown, E. Tracy; Greenberg, Russell] Smithsonian Inst, Natl Zool Pk, Smithsonian Migratory Bird Ctr, Washington, DC 20008 USA.
[Horton, Brent] Emory Univ, Dept Psychol, Atlanta, GA 30322 USA.
RP Ballentine, B (reprint author), Western Carolina Univ, Dept Biol, Cullowhee, NC 28723 USA.
EM beballentine@email.wcu.edu
FU Smithsonian Institution Endowment Grant; Friends of the National Zoo;
National Zoological Park
FX This project was supported by a Smithsonian Institution Endowment Grant,
The Friends of the National Zoo, and The National Zoological Park. We
thank members of the Migratory Bird Center for advice, support and
feedback. We thank Steve Nowicki for advice on experimental design. We
thank Jeff Podos, Tim Wright and two anonymous referees for helpful
comments that improved the manuscript.
NR 61
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PU ACADEMIC PRESS LTD- ELSEVIER SCIENCE LTD
PI LONDON
PA 24-28 OVAL RD, LONDON NW1 7DX, ENGLAND
SN 0003-3472
EI 1095-8282
J9 ANIM BEHAV
JI Anim. Behav.
PD AUG
PY 2013
VL 86
IS 2
BP 467
EP 473
DI 10.1016/j.anbehav.2013.06.002
PG 7
WC Behavioral Sciences; Zoology
SC Behavioral Sciences; Zoology
GA 201XE
UT WOS:000323175500030
ER
PT J
AU Kouba, AJ
Lloyd, RE
Houck, ML
Silla, AJ
Calatayud, N
Trudeau, VL
Clulow, J
Molinia, F
Langhorne, C
Vance, C
Arregui, L
Germano, J
Lermen, D
Della Togna, G
AF Kouba, Andrew J.
Lloyd, Rhiannon E.
Houck, Marlys L.
Silla, Aimee J.
Calatayud, Natalie
Trudeau, Vance L.
Clulow, John
Molinia, Frank
Langhorne, Cecilia
Vance, Carrie
Arregui, Lucia
Germano, Jennifer
Lermen, Dominik
Della Togna, Gina
TI Emerging trends for biobanking amphibian genetic resources: The hope,
reality and challenges for the next decade
SO BIOLOGICAL CONSERVATION
LA English
DT Article
DE Amphibian; Biobanking; Sperm; Oocyte; Embryo; Cell culture; Assisted
reproduction; Cryoconservation; Genetic resource bank (GRB)
AB How to conserve our planet's rapidly disappearing biodiversity is one of the greatest challenges of our generation. Among terrestrial vertebrate taxa, amphibians are most at risk with 41% of all known species experiencing population declines and one-third threatened with extinction. Although many institutions have responded by establishing captive assurance colonies for several critically endangered amphibians, the resources provided by these conservation organizations will not be enough to save all species 'at risk' without a multi-pronged approach. Around the world, zoos, aquariums, governments, and conservation NGOs are beginning to establish amphibian gene banks to conserve, in perpetuity, the remaining extant genetic diversity for many of these critically endangered species. A suite of biomaterials has been targeted for cryoconservation including blood, cell cultures, tissues, spermatozoa, eggs, and embryos. Several international workshops on amphibian gene banking and assisted reproductive technologies have been held between 2010 and 2012, bringing together leading experts in the fields of amphibian ecology, physiology, and cryobiology to synthesize emerging trends for biobanking amphibian genetic resources, provide opportunities for collaboration, and discuss future research directions. The following review paper and summary will provide a synopsis of these international workshops, in particular the hopes, realities, and current challenges inherent to this applied research field. (C) 2013 Elsevier Ltd. All rights reserved.
C1 [Kouba, Andrew J.] Memphis Zoo, Conservat & Res Dept, Memphis, TN USA.
[Lloyd, Rhiannon E.] Univ Portsmouth, Sch Pharm & Biomed Sci, Inst Biomed & Biomol Sci, Portsmouth, Hants, England.
[Houck, Marlys L.; Germano, Jennifer] San Diego Zoo Global, Inst Conservat Res, Escondido, CA USA.
[Silla, Aimee J.] Univ Wollongong, Sch Biol Sci, Inst Conservat Biol & Environm Management, Wollongong, NSW, Australia.
[Calatayud, Natalie; Langhorne, Cecilia; Vance, Carrie] Mississippi State Univ, Dept Biochem Mol Biol Entomol & Plant Pathol, Mississippi State, MS 39762 USA.
[Trudeau, Vance L.] Univ Ottawa, Dept Biol, Ctr Adv Res Environm Genom, Ottawa, ON K1N 6N5, Canada.
[Clulow, John] Univ Newcastle, Sch Environm & Life Sci, Newcastle, NSW 2300, Australia.
[Molinia, Frank] Landcare Res, Auckland, New Zealand.
[Arregui, Lucia] Univ Autonoma Madrid, Dept Biol, E-28049 Madrid, Spain.
[Lermen, Dominik] Fraunhofer Inst Biomed Engn, Dept Cell Biol & Appl Virol, D-66386 St Ingbert, Germany.
[Della Togna, Gina] Smithsonian Conservat Biol Inst, Ctr Species Survival, Washington, DC USA.
RP Kouba, AJ (reprint author), Memphis Zoo, Conservat & Res Dept, 2000 Prentiss Pl, Memphis, TN USA.
EM akouba@memphiszoo.org
RI Arregui, Lucia/C-2525-2013;
OI Trudeau, Vance/0000-0002-0845-9444; Silla, Aimee/0000-0002-2277-9030
FU Institute of Museum and Library Services (IMLSs) [LG-25-09-0064-09];
Morris Animal Foundation [D08ZO-037]; Leverhulme Trust [ECF/2009/0123];
NSW Environmental Trust [2012/RD/0105]; Memphis Zoo's Conservation
Action Network; Environment Canada; University of Ottawa Research Chair
program; Australian Research Council; World Wildlife Fund; National
Leadership Program Grant from IMLS [LG-25-08-0066]
FX AK work was supported by a National Leadership Grant (LG-25-09-0064-09)
from the Institute of Museum and Library Services (IMLSs) as well as a
Morris Animal Foundation Grant (D08ZO-037). R.L. is grateful for funding
from the Leverhulme Trust (ECF/2009/0123). AS is grateful to the NSW
Environmental Trust (Grant Number: 2012/RD/0105). LA is thankful to the
Memphis Zoo's Conservation Action Network for funding support. V.T. is
grateful for support from Environment Canada and the University of
Ottawa Research Chair program. J.C. is thankful for support from the
Australian Research Council and World Wildlife Fund. MH work was
supported by a National Leadership Program Grant (LG-25-08-0066) from
IMLS.
NR 113
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U1 7
U2 53
PU ELSEVIER SCI LTD
PI OXFORD
PA THE BOULEVARD, LANGFORD LANE, KIDLINGTON, OXFORD OX5 1GB, OXON, ENGLAND
SN 0006-3207
J9 BIOL CONSERV
JI Biol. Conserv.
PD AUG
PY 2013
VL 164
BP 10
EP 21
DI 10.1016/j.biocon.2013.03.010
PG 12
WC Biodiversity Conservation; Ecology; Environmental Sciences
SC Biodiversity & Conservation; Environmental Sciences & Ecology
GA 200RO
UT WOS:000323086800002
ER
PT J
AU Davidson, BS
Sattler, GD
Via, S
Braun, MJ
AF Davidson, Brian S.
Sattler, Gene D.
Via, Sara
Braun, Michael J.
TI Reproductive isolation and cryptic introgression in a sky island enclave
of Appalachian birds
SO ECOLOGY AND EVOLUTION
LA English
DT Article
DE Chickadees; hybridization; introgression; metapopulation dynamics;
Poecile; reproductive isolating mechanism; speciation
ID CHICKADEES PARUS-ATRICAPILLUS; BLACK-CAPPED CHICKADEE; MULTILOCUS
GENOTYPE DATA; POPULATION-STRUCTURE; HYBRID ZONE; CAROLINA CHICKADEES;
POECILE-ATRICAPILLUS; P-CAROLINENSIS; MITOCHONDRIAL-DNA; CLIMATE-CHANGE
AB Reproductive isolation is central to the speciation process, and cases where the strength of reproductive isolation varies geographically can inform our understanding of speciation mechanisms. Although generally treated as separate species, Black-capped chickadees (Poecile atricapillus) and Carolina chickadees (P. carolinensis) hybridize and undergo genetic introgression in many areas where they come into contact across the eastern United States and in the northern Appalachian Mountains. The Great Smoky Mountains harbor the last large breeding population of atricapillus in the southern Appalachians, isolated from the species' main range by nearly 200 km. This population is believed to be reproductively isolated from local carolinensis due to an unusual, behaviorally mediated elevational range gap, which forms during the breeding season and may function as an incipient reproductive isolating mechanism. We examined the effectiveness of this putative isolating mechanism by looking for genetic introgression from carolinensis in Great Smoky Mountain atricapillus. We characterized this population and parental controls genetically using hundreds of amplified fragment length polymorphism (AFLP) loci as well as mitochondrial DNA (mtDNA) sequence data from cytochrome-b. Great Smoky Mountain atricapillus have experienced nuclear genetic introgression from carolinensis, but at much lower levels than other populations near the hybrid zone to the north. No mitochondrial introgression was detected, in contrast to northern contact areas. Thus, the seasonal elevational range gap appears to have been effective in reducing gene flow between these closely related taxa.
C1 [Davidson, Brian S.; Braun, Michael J.] Smithsonian Inst, Dept Vertebrate Zool, Natl Museum Nat Hist, MRC 534, Suitland, MD 20746 USA.
[Davidson, Brian S.; Via, Sara; Braun, Michael J.] Univ Maryland, Program Behav Ecol Evolut & Systemat, College Pk, MD 20742 USA.
[Sattler, Gene D.] Liberty Univ, Dept Biol & Chem, Lynchburg, VA 24502 USA.
RP Braun, MJ (reprint author), Smithsonian Inst, Dept Vertebrate Zool, Natl Museum Nat Hist, MRC 534,4210 Silver Hill Rd, Suitland, MD 20746 USA.
EM braunm@si.edu
FU Smithsonian Institution Research Endowments program; University of
Maryland
FX The Smithsonian Institution Research Endowments program and the
University of Maryland provided support for this research.
NR 68
TC 5
Z9 5
U1 0
U2 31
PU WILEY-BLACKWELL
PI HOBOKEN
PA 111 RIVER ST, HOBOKEN 07030-5774, NJ USA
SN 2045-7758
J9 ECOL EVOL
JI Ecol. Evol.
PD AUG
PY 2013
VL 3
IS 8
BP 2485
EP 2496
DI 10.1002/ece3.604
PG 12
WC Ecology; Evolutionary Biology
SC Environmental Sciences & Ecology; Evolutionary Biology
GA 202GA
UT WOS:000323200800008
ER
PT J
AU Pinto, CM
Helgen, KM
Fleischer, RC
Perkins, SL
AF Miguel Pinto, C.
Helgen, Kristofer M.
Fleischer, Robert C.
Perkins, Susan L.
TI Hepatozoon Parasites (Apicomplexa: Adeleorina) in Bats
SO JOURNAL OF PARASITOLOGY
LA English
DT Article
ID RIBOSOMAL-RNA GENE; MOLECULAR CHARACTERIZATION; PHYLOGENETIC INFERENCE;
TISSUE-CYSTS; SEQUENCES; COCCIDIA; BRAZIL; ZONE
AB We provide the first evidence of Hepatozoon parasites infecting bats. We sequenced a short fragment of the 18S rRNA gene (similar to 600 base pairs) of Hepatozoon parasites from 3 Hipposideros cervinus bats from Borneo. Phylogenies inferred by model-based methods place these Hepatozoon within a clade formed by parasites of reptiles, rodents, and marsupials. We discuss the scenario that bats might be common hosts of Hepatozoon.
C1 [Miguel Pinto, C.] Amer Museum Nat Hist, Dept Mammal, New York, NY 10024 USA.
[Miguel Pinto, C.; Perkins, Susan L.] Amer Museum Nat Hist, Sackler Inst Comparat Genom, New York, NY 10024 USA.
[Miguel Pinto, C.] CUNY, Grad Ctr, New York, NY 10016 USA.
[Miguel Pinto, C.] Pontificia Univ Catolica Ecuador, Ctr Invest Enfermedades Infecciosas, Quito, Ecuador.
[Miguel Pinto, C.; Helgen, Kristofer M.] Smithsonian Inst, Natl Museum Nat Hist, Div Mammals, Washington, DC 20013 USA.
[Fleischer, Robert C.] Smithsonian Conservat Biol Inst, Ctr Conservat & Evolutionary Genet, Washington, DC 20008 USA.
RP Pinto, CM (reprint author), Amer Museum Nat Hist, Dept Mammal, New York, NY 10024 USA.
EM mpinto@amnh.org
OI Perkins, Susan/0000-0002-5400-5662
FU American Society of Mammalogists; Smithsonian Institution
FX CMP acknowledges the support provided by a Grant-in-Aid of the American
Society of Mammalogists and a graduate student fellowship from the
Smithsonian Institution. Fieldwork was supported by funding from the
Smithsonian Institution and logistical support from Robert Stuebing and
the Bintulu Office of Grand Perfect Sdn Bhd.
NR 27
TC 5
Z9 5
U1 0
U2 10
PU AMER SOC PARASITOLOGISTS
PI LAWRENCE
PA 810 EAST 10TH STREET, LAWRENCE, KS 66044 USA
SN 0022-3395
J9 J PARASITOL
JI J. Parasitol.
PD AUG
PY 2013
VL 99
IS 4
BP 722
EP 724
DI 10.1645/12-18.1
PG 3
WC Parasitology
SC Parasitology
GA 197BG
UT WOS:000322821900025
PM 23240742
ER
PT J
AU Scarlata, CD
Elias, BA
Godwin, JR
Powell, RA
Shepherdson, D
Shipley, LA
Brown, JL
AF Scarlata, C. D.
Elias, B. A.
Godwin, J. R.
Powell, R. A.
Shepherdson, D.
Shipley, L. A.
Brown, J. L.
TI Influence of environmental conditions and facility on faecal
glucocorticoid concentrations in captive pygmy rabbits (Brachylagus
idahoensis)
SO ANIMAL WELFARE
LA English
DT Article
DE animal welfare; captive breeding; environmental enrichment; faecal
glucocorticoids; husbandry; pygmy rabbit
ID URINARY CORTISOL RESPONSES; ANIMAL-WELFARE; ADRENOCORTICAL ACTIVITY;
REPRODUCTIVE SUCCESS; STRESS RESPONSES; ZOO ANIMALS; ROOM CHANGE;
ENRICHMENT; BEHAVIOR; AGGRESSION
AB The objective of this study was to determine if housing conditions, specifically pen size and soil enrichment, had an effect on faecal glucocorticoid concentrations in the endangered pygmy rabbit (Brachylagus idahoensis). The success of the captive breeding programme has been limited, so one hypothesis is that chronic stress due to sub-optimal housing conditions may be responsible for poor fecundity. Faecal glucocorticoid concentrations were assessed in 50 females housed among several pen types at two breeding facilities. The highest glucocorticoid concentrations were found in females housed in 0.37 m(2) crates as compared to enclosures ranging from 0.96 to 75 m(2) in size. Results also indicated that enrichment of enclosures with soil had a significant influence on adrenal activity, based on a reduction in glucocorticoid excretion for females moved from non-soil pens to those with soil. Last, a significant facility effect on glucocorticoid concentrations was observed, suggesting that factors other than housing influenced adrenal activity in these rabbits. In conclusion, based on measurements of faecal glucocorticoids, pygmy rabbits are best managed in enclosures that contain soil for digging burrows. Pen size had little effect on stress hormones, except for crates where limited space and/or absence of soil was associated with higher glucocorticoid concentrations. These results underline the importance of monitoring glucocorticoid concentrations in captive breeding programmes to identify optimal husbandry and management practices.
C1 [Scarlata, C. D.; Godwin, J. R.; Powell, R. A.] N Carolina State Univ, Raleigh, NC 27695 USA.
[Scarlata, C. D.; Shepherdson, D.] Oregon Zoo, Portland, OR USA.
[Elias, B. A.; Shipley, L. A.] Washington State Univ, Pullman, WA 99164 USA.
[Brown, J. L.] Smithsonian Conservat Biol Inst, Front Royal, VA 22630 USA.
RP Brown, JL (reprint author), Smithsonian Conservat Biol Inst, Natl Zool Pk,1500 Remount Rd, Front Royal, VA 22630 USA.
EM brownjan@si.edu
FU Morris Animal Foundation; Smithsonian Institution; Friends of the
National Zoo; Washington Department of Fish and Wildlife; North Carolina
State University; Washington State University
FX Thank you to all the pygmy rabbit keepers (M Illig, J Jackson-VonDohlen,
A Williams, H Starr, R Lamson, K Walker and L Klinski) for their
dedication to the rabbits and for all the hours spent collecting samples
and behavioural data. In addition, thank you to N Presley, N Parker and
S Putnam for their patience and technical assistance in the laboratory.
The authors are grateful to H Patisaul and S Kennedy Stoskopf for
insightful thoughts on the development of this study and for helpful
comments on drafts of the manuscript. Funding for this project was
provided by a large grant from the Morris Animal Foundation and several
supporting grants from the Smithsonian Institution, Friends of the
National Zoo, Washington Department of Fish and Wildlife, North Carolina
State University, and Washington State University.
NR 43
TC 7
Z9 7
U1 3
U2 36
PU UNIV FEDERATION ANIMAL WELFARE
PI WHEATHAMPSTEAD
PA OLD SCHOOL, BREWHOUSE HILL, WHEATHAMPSTEAD AL4 8AN, HERTS, ENGLAND
SN 0962-7286
J9 ANIM WELFARE
JI Anim. Welf.
PD AUG
PY 2013
VL 22
IS 3
BP 357
EP 368
DI 10.7120/09627286.22.3.357
PG 12
WC Veterinary Sciences; Zoology
SC Veterinary Sciences; Zoology
GA 196JE
UT WOS:000322769700007
ER
PT J
AU Queenborough, SA
Metz, MR
Valencia, R
Wright, SJ
AF Queenborough, Simon A.
Metz, Margaret R.
Valencia, Renato
Joseph Wright, S.
TI Demographic consequences of chromatic leaf defence in tropical tree
communities: do red young leaves increase growth and survival?
SO ANNALS OF BOTANY
LA English
DT Article
DE Delayed greening; seedling herbivory; young leaf colour; seedlings;
tropical forest
ID NEOTROPICAL FOREST; RAIN-FOREST; ANTIHERBIVORE DEFENSE; DEPENDENT
RECRUITMENT; SPECIES COEXISTENCE; AMAZONIAN FORESTS; JUVENILE LEAVES;
USE EFFICIENCY; PLANT DEFENSE; TRADE-OFF
AB Many tropical forest tree species delay greening their leaves until full expansion. This strategy is thought to provide newly flushing leaves with protection against damage by herbivores by keeping young leaves devoid of nutritive value. Because young leaves suffer the greatest predation from invertebrate herbivores, delayed greening could prevent costly tissue loss. Many species that delay greening also produce anthocyanin pigments in their new leaves, giving them a reddish tint. These anthocyanins may be fungicidal, protect leaves against UV damage or make leaves cryptic to herbivores blind to the red part of the spectrum.
A comprehensive survey was undertaken of seedlings, saplings and mature trees in two diverse tropical forests: a rain forest in western Amazonia (Yasun National Park, Ecuador) and a deciduous forest in Central America (Barro Colorado Island, Panam). A test was made of whether individuals and species with delayed greening or red-coloured young leaves showed lower mortality or higher relative growth rates than species that did not.
At both Yasun and Barro Colorado Island, species with delayed greening or red young leaves comprised significant proportions of the seedling and tree communities. At both sites, significantly lower mortality was found in seedlings and trees with delayed greening and red-coloured young leaves. While there was little effect of leaf colour on the production of new leaves of seedlings, diameter relative growth rates of small trees were lower in species with delayed greening and red-coloured young leaves than in species with regular green leaves, and this effect remained when the trade-off between mortality and growth was accounted for.
Herbivores exert strong selection pressure on seedlings for the expression of defence traits. A delayed greening or red-coloured young leaf strategy in seedlings appears to be associated with higher survival for a given growth rate, and may thus influence the species composition of later life stages.
C1 [Queenborough, Simon A.] Ohio State Univ, Dept Ecol Evolut & Organismal Biol, Columbus, OH 43210 USA.
[Metz, Margaret R.] Univ Calif Davis, Dept Plant Pathol, Davis, CA 95616 USA.
[Valencia, Renato] Pontifical Catholic Univ Ecuador, Sch Biol Sci, Plant Ecol Lab, Quito, Ecuador.
[Joseph Wright, S.] Smithsonian Trop Res Inst, Panama City, Panama.
RP Queenborough, SA (reprint author), Ohio State Univ, Dept Ecol Evolut & Organismal Biol, Columbus, OH 43210 USA.
EM queenborough.1@osu.edu
RI Wright, Stuart/M-3311-2013
OI Wright, Stuart/0000-0003-4260-5676
FU National Science Foundation's LTREB programme [DEB-1122634,
DEB-0614525]; Center for Tropical Forest Science at the Smithsonian
Tropical Research Institute; University of California, Berkeley;
SENESCYT [300]; Pontifical Catholic University of Ecuador (PUCE);
Environmental Sciences Program of the Smithsonian Institution
FX We are extremely grateful to Lissy Coley and Tom Kursar for allowing us
to use data they collected in Panama, as well as providing many
insightful comments on the manuscript. We further thank Kasey Barton and
two anonymous reviewers for many helpful comments on the manuscript, and
Kasey Barton and Mick Hanley for inviting M. R. M. and S. A. Q. to the
seedling herbivory special symposium at ESA 2012. We thank Laura Mason
for help with database management. R. V. thanks PUCE for granting him a
sabbatical year and the University of Aarhus for offering research
facilities during this year. We appreciate the hard work of the many
field assistants who have diligently surveyed the seedling and tree
communities in Yasuni and BCI for many years, especially Anelio Loor,
Everaldo Zambrano and Milton Zambrano at Yasuni, and A. Hernandez and R.
Gonzalez at BCI. We thank the Ministerio del Medioambiente of Ecuador
for permission to carry out fieldwork in Yasuni National Park and within
the Yasuni Forest Dynamics Plot. Both the Yasuni and BCI Forest Dynamics
Plots are associated to the Center for Tropical Forest Science, a global
network of large-scale demographic tree plots. The Yasuni seedling
census is supported via the National Science Foundation's LTREB
programme under grants DEB-1122634 and DEB-0614525, as well as grants
from the Center for Tropical Forest Science at the Smithsonian Tropical
Research Institute and from the University of California, Berkeley. The
Yasuni FDP was supported by SENESCYT (project 300) in 2011. The Forest
Dynamics Plot of Yasuni National Park has been made possible through the
generous support of the Pontifical Catholic University of Ecuador (PUCE)
funds of donaciones del impuesto a la renta, the government of Ecuador,
the US National Science Foundation, the Andrew W. Mellon Foundation, the
Smithsonian Tropical Research Institute and the University of Aarhus of
Denmark. The Environmental Sciences Program of the Smithsonian
Institution supported the seedling studies at BCI.
NR 62
TC 7
Z9 9
U1 2
U2 46
PU OXFORD UNIV PRESS
PI OXFORD
PA GREAT CLARENDON ST, OXFORD OX2 6DP, ENGLAND
SN 0305-7364
J9 ANN BOT-LONDON
JI Ann. Bot.
PD AUG
PY 2013
VL 112
IS 4
SI SI
BP 677
EP 684
DI 10.1093/aob/mct144
PG 8
WC Plant Sciences
SC Plant Sciences
GA 198WC
UT WOS:000322952500005
PM 23881717
ER
PT J
AU Kitajima, K
Cordero, RA
Wright, SJ
AF Kitajima, Kaoru
Cordero, Roberto A.
Joseph Wright, S.
TI Leaf life span spectrum of tropical woody seedlings: effects of light
and ontogeny and consequences for survival
SO ANNALS OF BOTANY
LA English
DT Article
DE Fracture toughness; herbivory; leaf life span; leaf density; leaf
toughness; light environment; ontogenetic changes; phenotypic
plasticity; seedling survival; stem density; tropical lianas; tropical
trees
ID RAIN-FOREST EVERGREENS; COST-BENEFIT-ANALYSIS; SHADE TOLERANCE; TREE
SEEDLINGS; FRACTURE-TOUGHNESS; NEOTROPICAL FOREST; RESOURCE
AVAILABILITY; CARBOHYDRATE STORAGE; ECONOMICS SPECTRUM; FUNCTIONAL
TRAITS
AB Leaf life span is widely recognized as a key life history trait associated with herbivory resistance, but rigorous comparative data are rare for seedlings. The goal of this study was to examine how light environment affects leaf life span, and how ontogenetic development during the first year may influence leaf fracture toughness, lamina density and stem density that are relevant for herbivory resistance, leaf life span and seedling survival.
Data from three experiments encompassing 104 neotropical woody species were combined. Leaf life span, lamina and vein fracture toughness, leaf and stem tissue density and seedling survival were quantified for the first-year seedlings at standardized ontogenetic stages in shade houses and common gardens established in gaps and shaded understorey in a moist tropical forest in Panama. Mortality of naturally recruited seedlings till 1 year later was quantified in 800 1-m(2) plots from 1994 to 2011.
Median leaf life span ranged widely among species, always greater in shade (ranging from 151 to 1790 d in the understorey and shade houses) than in gaps (115867 d), but with strong correlation between gaps and shade. Leaf and stem tissue density increased with seedling age, whereas leaf fracture toughness showed only a weak increase. All these traits were positively correlated with leaf life span. Leaf life span and stem density were negatively correlated with seedling mortality in shade, while gap mortality showed no correlation with these traits.
The wide spectrum of leaf life span and associated functional traits reflects variation in shade tolerance of first-year seedlings among coexisting trees, shrubs and lianas in this neotropical forest. High leaf tissue density is important in enhancing leaf toughness, a known physical defence, and leaf life span. Both seedling leaf life span and stem density should be considered as key functional traits that contribute to seedling survival in tropical forest understoreys.
C1 [Kitajima, Kaoru] Univ Florida, Dept Biol, Gainesville, FL 32611 USA.
[Kitajima, Kaoru; Joseph Wright, S.] Smithsonian Trop Res Inst, Balboa, Panama.
[Cordero, Roberto A.] Univ Nacl, Escuela Ciencias Biol, Heredia, Costa Rica.
RP Kitajima, K (reprint author), Univ Florida, Dept Biol, Gainesville, FL 32611 USA.
EM kitajima@ufl.edu
RI Wright, Stuart/M-3311-2013; Cordero Solorzano, Roberto A./H-8273-2016
OI Wright, Stuart/0000-0003-4260-5676; Cordero Solorzano, Roberto
A./0000-0001-7270-104X
FU Smithsonian Tropical Research Institute; [NSF-0093033]
FX We thank Sebastian Bernal, Marta Vargas, Joel Sands and Andrez Hernandez
for growing, monitoring and/or measuring thousands of seedlings, and
also Lisa Cowart, Jeff Hubbard, Sarah Tarrant and Ana-Maria Llorens for
their assistance. The study was supported by NSF-0093033 to K. K., and
by the Smithsonian Tropical Research Institute.
NR 85
TC 14
Z9 15
U1 1
U2 77
PU OXFORD UNIV PRESS
PI OXFORD
PA GREAT CLARENDON ST, OXFORD OX2 6DP, ENGLAND
SN 0305-7364
J9 ANN BOT-LONDON
JI Ann. Bot.
PD AUG
PY 2013
VL 112
IS 4
SI SI
BP 685
EP 699
DI 10.1093/aob/mct036
PG 15
WC Plant Sciences
SC Plant Sciences
GA 198WC
UT WOS:000322952500006
PM 23532047
ER
PT J
AU Guo, YC
Ferguson, HC
Giavalisco, M
Barro, G
Willner, SP
Ashby, MLN
Dahlen, T
Donley, JL
Faber, SM
Fontana, A
Galametz, A
Grazian, A
Huang, KH
Kocevski, DD
Koekemoer, AM
Koo, DC
McGrath, EJ
Peth, M
Salvato, M
Wuyts, S
Castellano, M
Cooray, AR
Dickinson, ME
Dunlop, JS
Fazio, GG
Gardner, JP
Gawiser, E
Grogin, NA
Hathi, NP
Hsu, LT
Lee, KS
Lucas, RA
Mobasher, B
Nandra, K
Newman, JA
van der Wel, A
AF Guo, Yicheng
Ferguson, Henry C.
Giavalisco, Mauro
Barro, Guillermo
Willner, S. P.
Ashby, Matthew L. N.
Dahlen, Tomas
Donley, Jennifer L.
Faber, Sandra M.
Fontana, Adriano
Galametz, Audrey
Grazian, Andrea
Huang, Kuang-Han
Kocevski, Dale D.
Koekemoer, Anton M.
Koo, David C.
McGrath, Elizabeth J.
Peth, Michael
Salvato, Mara
Wuyts, Stijn
Castellano, Marco
Cooray, Asantha R.
Dickinson, Mark E.
Dunlop, James S.
Fazio, G. G.
Gardner, Jonathan P.
Gawiser, Eric
Grogin, Norman A.
Hathi, Nimish P.
Hsu, Li-Ting
Lee, Kyoung-Soo
Lucas, Ray A.
Mobasher, Bahram
Nandra, Kirpal
Newman, Jeffery A.
van der Wel, Arjen
TI CANDELS MULTI-WAVELENGTH CATALOGS: SOURCE DETECTION AND PHOTOMETRY IN
THE GOODS-SOUTH FIELD
SO ASTROPHYSICAL JOURNAL SUPPLEMENT SERIES
LA English
DT Article
DE catalogs; galaxies: high-redshift; galaxies: photometry; methods: data
analysis; techniques: image processing
ID ORIGINS DEEP SURVEY; SPECTRAL ENERGY-DISTRIBUTIONS; STAR-FORMATION
HISTORY; SIMILAR-TO 2; GMASS ULTRADEEP SPECTROSCOPY; EXTRAGALACTIC
LEGACY SURVEY; REST-FRAME ULTRAVIOLET; UV LUMINOSITY FUNCTION;
HIGH-REDSHIFT GALAXIES; SPACE-TELESCOPE
AB We present a UV to mid-infrared multi-wavelength catalog in the CANDELS/GOODS-S field, combining the newly obtained CANDELS HST/WFC3 F105W, F125W, and F160W data with existing public data. The catalog is based on source detection in the WFC3 F160W band. The F160W mosaic includes the data from CANDELS deep and wide observations as well as previous ERS and HUDF09 programs. The mosaic reaches a 5 sigma limiting depth (within an aperture of radius 0 ''.17) of 27.4, 28.2, and 29.7 AB for CANDELS wide, deep, and HUDF regions, respectively. The catalog contains 34,930 sources with the representative 50% completeness reaching 25.9, 26.6, and 28.1 AB in the F160W band for the three regions. In addition to WFC3 bands, the catalog also includes data from UV (U band from both CTIO/MOSAIC and VLT/VIMOS), optical (HST/ACS F435W, F606W, F775W, F814W, and F850LP), and infrared (HST/WFC3 F098M, VLT/ISAAC K s, VLT/HAWK-I K s, and Spitzer/IRAC 3.6, 4.5, 5.8, 8.0 mu m) observations. The catalog is validated via stellar colors, comparison with other published catalogs, zero-point offsets determined from the best-fit templates of the spectral energy distribution of spectroscopically observed objects, and the accuracy of photometric redshifts. The catalog is able to detect unreddened star-forming (passive) galaxies with stellar mass of 10(10) M-circle dot at a 50% completeness level to z similar to 3.4 (2.8), 4.6 (3.2), and 7.0 (4.2) in the three regions. As an example of application, the catalog is used to select both star-forming and passive galaxies at z similar to 2-4 via the Balmer break. It is also used to study the color-magnitude diagram of galaxies at 0 < z < 4.
C1 [Guo, Yicheng; Barro, Guillermo; Faber, Sandra M.; Koo, David C.] Univ Calif Santa Cruz, Lick Observ, Dept Astron & Astrophys, UCO, Santa Cruz, CA 95064 USA.
[Guo, Yicheng; Giavalisco, Mauro] Univ Massachusetts, Dept Astron, Amherst, MA 01003 USA.
[Ferguson, Henry C.; Dahlen, Tomas; Huang, Kuang-Han; Koekemoer, Anton M.; Lucas, Ray A.] Space Telescope Sci Inst, Baltimore, MD 21218 USA.
[Willner, S. P.; Ashby, Matthew L. N.; Fazio, G. G.] Harvard Smithsonian Ctr Astrophys, Cambridge, MA 02138 USA.
[Donley, Jennifer L.] Los Alamos Natl Lab, Los Alamos, NM USA.
[Fontana, Adriano; Galametz, Audrey; Grazian, Andrea; Castellano, Marco] INAF, Osservatorio Astron, I-00040 Monte Porzio Catone, Italy.
[Huang, Kuang-Han; Peth, Michael] Johns Hopkins Univ, Dept Phys & Astron, Baltimore, MD 21218 USA.
[Kocevski, Dale D.] Univ Kentucky, Dept Phys & Astron, Lexington, KY 40506 USA.
[McGrath, Elizabeth J.] Colby Coll, Dept Phys & Astron, Waterville, ME 04901 USA.
[Salvato, Mara; Wuyts, Stijn; Hsu, Li-Ting; Nandra, Kirpal] Max Planck Inst Extraterr Phys, D-85741 Garching, Germany.
[Salvato, Mara] Excellence Cluster, D-85748 Garching, Germany.
[Cooray, Asantha R.] Univ Calif Irvine, Dept Phys & Astron, Irvine, CA USA.
[Dickinson, Mark E.] Natl Opt Astron Observ, Tucson, AZ 85726 USA.
[Dunlop, James S.] Univ Edinburgh, Royal Observ, Inst Astron, Edinburgh EH9 3HJ, Midlothian, Scotland.
[Gardner, Jonathan P.] NASAs Goddard Space Flight Ctr, Astrophys Sci Div, Observat Cosmol Lab, Greenbelt, MD USA.
[Gawiser, Eric] Rutgers State Univ, Dept Phys & Astron, New Brunswick, NJ 08903 USA.
[Hathi, Nimish P.] Carnegie Observ, Pasadena, CA USA.
[Lee, Kyoung-Soo] Purdue Univ, Dept Phys, W Lafayette, IN 47907 USA.
[Mobasher, Bahram] Univ Calif Riverside, Dept Phys & Astron, Riverside, CA 92521 USA.
[Newman, Jeffery A.] Univ Pittsburgh, Dept Phys & Astron, Pittsburgh, PA 15260 USA.
[van der Wel, Arjen] Max Planck Inst Astron, D-69117 Heidelberg, Germany.
RP Guo, YC (reprint author), Univ Calif Santa Cruz, Lick Observ, Dept Astron & Astrophys, UCO, Santa Cruz, CA 95064 USA.
EM ycguo@ucolick.org
RI Hathi, Nimish/J-7092-2014;
OI Hathi, Nimish/0000-0001-6145-5090; Castellano,
Marco/0000-0001-9875-8263; Koekemoer, Anton/0000-0002-6610-2048;
fontana, adriano/0000-0003-3820-2823
FU NASA through a grant from the Space Telescope Science Institute
[HST-GO-12060]; NASA [NAS5-26555]; NASA HST [GO-12060.10-A]; NSF
[AST-0808133]; European Research Council; Royal Society
FX We thank the anonymous referee for constructive comments that improve
this article. Support for program number HST-GO-12060 was provided by
NASA through a grant from the Space Telescope Science Institute, which
is operated by the Association of Universities for Research in
Astronomy, Incorporated, under NASA contract NAS5-26555. Y.G. and the
authors from UCSC acknowledge support from NASA HST grant GO-12060.10-A
and NSF grant AST-0808133. J.S.D. acknowledges the support of the
European Research Council via the award of an Advanced Grant and the
support of the Royal Society via a Wolfson Research Merit Award. This
work is based in part on observations made with the Spitzer Space
Telescope, which is operated by the Jet Propulsion Laboratory,
California Institute of Technology, under a contract with NASA. Support
for this work was provided by NASA through an award issued by
JPL/Caltech.
NR 84
TC 120
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U1 0
U2 6
PU IOP PUBLISHING LTD
PI BRISTOL
PA TEMPLE CIRCUS, TEMPLE WAY, BRISTOL BS1 6BE, ENGLAND
SN 0067-0049
EI 1538-4365
J9 ASTROPHYS J SUPPL S
JI Astrophys. J. Suppl. Ser.
PD AUG
PY 2013
VL 207
IS 2
AR UNSP 24
DI 10.1088/0067-0049/207/2/24
PG 23
WC Astronomy & Astrophysics
SC Astronomy & Astrophysics
GA 195NO
UT WOS:000322710000006
ER
PT J
AU Gingerich, O
AF Gingerich, Owen
TI TRANSITS IN THE SEVENTEENTH CENTURY AND THE CREDENTIALLING OF KEPLERIAN
ASTRONOMY
SO JOURNAL FOR THE HISTORY OF ASTRONOMY
LA English
DT Article
C1 Harvard Smithsonian Ctr Astrophys, Cambridge, MA 02138 USA.
RP Gingerich, O (reprint author), Harvard Smithsonian Ctr Astrophys, Cambridge, MA 02138 USA.
EM ginger@cfa.harvard.edu
NR 26
TC 1
Z9 1
U1 0
U2 1
PU SCIENCE HISTORY PUBLICATIONS LTD
PI CAMBRIDGE
PA 16 RUTHERFORD RD, CAMBRIDGE CB2 2HH, ENGLAND
SN 0021-8286
J9 J HIST ASTRON
JI J. Hist. Astron.
PD AUG
PY 2013
VL 44
BP 303
EP 312
PN 3
PG 10
WC History & Philosophy Of Science
SC History & Philosophy of Science
GA 193LG
UT WOS:000322560700004
ER
PT J
AU Gingerich, O
AF Gingerich, Owen
TI A Renaissance Globemaker's Toolbox: Johannes Schoner and the Revolution
of Modern Science, 1475-1550
SO JOURNAL FOR THE HISTORY OF ASTRONOMY
LA English
DT Book Review
C1 [Gingerich, Owen] Harvard Smithsonian Ctr Astrophys, Cambridge, MA 02138 USA.
RP Gingerich, O (reprint author), Harvard Smithsonian Ctr Astrophys, Cambridge, MA 02138 USA.
EM ginger@cfa.harvard.edu
NR 1
TC 0
Z9 0
U1 0
U2 0
PU SCIENCE HISTORY PUBLICATIONS LTD
PI CAMBRIDGE
PA 16 RUTHERFORD RD, CAMBRIDGE CB2 2HH, ENGLAND
SN 0021-8286
J9 J HIST ASTRON
JI J. Hist. Astron.
PD AUG
PY 2013
VL 44
BP 364
EP 365
PN 3
PG 2
WC History & Philosophy Of Science
SC History & Philosophy of Science
GA 193LG
UT WOS:000322560700008
ER
PT J
AU Hong, T
AF Hong, Terry
TI The Lowland
SO LIBRARY JOURNAL
LA English
DT Book Review
C1 [Hong, Terry] Smithsonian BookDragon, Washington, DC USA.
RP Hong, T (reprint author), Smithsonian BookDragon, Washington, DC USA.
NR 1
TC 0
Z9 0
U1 0
U2 0
PU REED BUSINESS INFORMATION
PI NEW YORK
PA 360 PARK AVENUE SOUTH, NEW YORK, NY 10010 USA
SN 0363-0277
J9 LIBR J
JI Libr. J.
PD AUG
PY 2013
VL 138
IS 13
BP 87
EP 87
PG 1
WC Information Science & Library Science
SC Information Science & Library Science
GA 201LI
UT WOS:000323142700183
ER
PT J
AU Riley, SM
AF Riley, Sheila M.
TI Loss of Innocence
SO LIBRARY JOURNAL
LA English
DT Book Review
C1 [Riley, Sheila M.] Smithsonian Inst Libs, Washington, DC USA.
RP Riley, SM (reprint author), Smithsonian Inst Libs, Washington, DC USA.
NR 1
TC 0
Z9 0
U1 0
U2 1
PU REED BUSINESS INFORMATION
PI NEW YORK
PA 360 PARK AVENUE SOUTH, NEW YORK, NY 10010 USA
SN 0363-0277
J9 LIBR J
JI Libr. J.
PD AUG
PY 2013
VL 138
IS 13
BP 88
EP 88
PG 1
WC Information Science & Library Science
SC Information Science & Library Science
GA 201LI
UT WOS:000323142700191
ER
PT J
AU Slater, GJ
Harmon, LJ
AF Slater, Graham J.
Harmon, Luke J.
TI Unifying fossils and phylogenies for comparative analyses of
diversification and trait evolution
SO METHODS IN ECOLOGY AND EVOLUTION
LA English
DT Editorial Material
DE macroevolution; palaeontology; phylogenetic comparative methods;
systematics
ID MOLECULAR PHYLOGENIES; NEOGENE BRYOZOAN; BODY-SIZE; RATES; RECORD;
SPECIATION; DIVERSITY; TEMPO; TIME; RECONSTRUCTION
AB 1. The aim of macroevolutionary research is to understand pattern and process in phenotypic evolution and lineage diversification at and above the species level. Historically, this kind of research has been tackled separately by palaeontologists, using the fossil record, and by evolutionary biologists, using phylogenetic comparative methods.
2. Although both approaches have strengths, researchers gain most power to understand macroevolution when data from living and fossil species are analysed together in a phylogenetic framework. This merger sets up a series of challenges - for many fossil clades, well-resolved phylogenies based on morphological data are not available, while placing fossils into phylogenies of extant taxa and determining their branching times is equally challenging. Once methods for building such trees are available, modelling phenotypic and lineage diversification using combined data presents its own set of challenges.
3. The five papers in this Special Feature tackle a disparate range of topics in macroevolutionary research, from time calibration of trees to modelling phenotypic evolution. All are united, however, in implementing novel phylogenetic approaches to understand macroevolutionary pattern and process in or using the fossil record. This Special Feature highlights the benefits that may be reaped by integrating data from living and extinct species and, we hope, will spur further integrative work by empiricists and theoreticians from both sides of the macroevolutionary divide.
C1 [Slater, Graham J.] Smithsonian Inst, Dept Paleobiol, Washington, DC 20013 USA.
[Slater, Graham J.] Smithsonian Inst, Div Mammals, Museum Natl Hist Nat, Washington, DC 20013 USA.
[Harmon, Luke J.] Univ Idaho, Dept Biol Sci, Moscow, ID 83844 USA.
[Harmon, Luke J.] Univ Idaho, Inst Bioinformat & Evolutionary Studies IBEST, Moscow, ID 83844 USA.
RP Slater, GJ (reprint author), Smithsonian Inst, Dept Paleobiol, MRC 121,POB 37012, Washington, DC 20013 USA.
EM SlaterG@si.edu
NR 48
TC 29
Z9 29
U1 2
U2 45
PU WILEY-BLACKWELL
PI HOBOKEN
PA 111 RIVER ST, HOBOKEN 07030-5774, NJ USA
SN 2041-210X
J9 METHODS ECOL EVOL
JI Methods Ecol. Evol.
PD AUG
PY 2013
VL 4
IS 8
BP 699
EP 702
DI 10.1111/2041-210X.12091
PG 4
WC Ecology
SC Environmental Sciences & Ecology
GA 197ZK
UT WOS:000322891200001
ER
PT J
AU Wagner, PJ
Marcot, JD
AF Wagner, Peter J.
Marcot, Jonathan D.
TI Modelling distributions of fossil sampling rates over time, space and
taxa: assessment and implications for macroevolutionary studies
SO METHODS IN ECOLOGY AND EVOLUTION
LA English
DT Article
DE evolutionary biology; macroevolution; phylogenetics; systematics
ID NORTH-AMERICAN MAMMALS; MAXIMUM-LIKELIHOOD; TAXONOMIC DIVERSITY;
DIVERGENCE TIMES; RECORD; DIVERSIFICATION; PATTERNS; EVOLUTION;
PRESERVATION; HYPOTHESES
AB 1. Observed patterns in the fossil record reflect not just macroevolutionary dynamics, but preservation patterns. Sampling rates themselves vary not simply over time or among major taxonomic groups, but within time intervals over geography and environment, and among species within clades. Large databases of presences of taxa in fossil-bearing collections allow us to quantify variation in per-collection sampling rates among species within a clade. We do this separately not just for different time/stratigraphic intervals, but also for different geographic or ecologic units within time/stratigraphic intervals. We then re-assess per-million-year sampling rates given the distributions of per-collection sampling rates.
2. We use simple distribution models (geometric and lognormal) to assess general models of per-locality sampling rate distributions given occurrences among appropriate fossiliferous localities. We break these down not simply by time period, but by general biogeographic units in order to accommodate variation over space as well as among species.
3. We apply these methods to occurrence data for Meso-Cenozoic mammals drawn from the Paleobiology Database and the New and Old Worlds fossil mammal database. We find that all models of distributed rates do vastly better than the best uniform sampling rates and that the lognormal in particular does an excellent job of summarizing sampling rates. We also show that the lognormal distributions vary fairly substantially among biogeographic units of the same age.
4. As an example of the utility of these rates, we assess the most likely divergence times for basal (Eocene-Oligocene) carnivoramorphan mammals from North America and Eurasia using both stratigraphic and morphological data. The results allow for unsampled taxa or unsampled portions of sampled lineages to be in either continent and also allow for the variation in sampling rates among species. We contrast five models using stratigraphic likelihoods in different ways to summarize how they might affect macroevolutionary inferences.
C1 [Wagner, Peter J.] Smithsonian Inst, Dept Paleobiol, Natl Museum Nat Hist, Washington, DC 20013 USA.
[Marcot, Jonathan D.] Univ Illinois, Dept Anim Biol, Urbana, IL 61801 USA.
RP Wagner, PJ (reprint author), Smithsonian Inst, Dept Paleobiol, Natl Museum Nat Hist, MRC 121,POB 37012, Washington, DC 20013 USA.
EM wagnerpj@si.edu
RI Marcot, Jonathan/G-2427-2012
NR 63
TC 20
Z9 20
U1 0
U2 25
PU WILEY-BLACKWELL
PI HOBOKEN
PA 111 RIVER ST, HOBOKEN 07030-5774, NJ USA
SN 2041-210X
J9 METHODS ECOL EVOL
JI Methods Ecol. Evol.
PD AUG
PY 2013
VL 4
IS 8
BP 703
EP 713
DI 10.1111/2041-210X.12088
PG 11
WC Ecology
SC Environmental Sciences & Ecology
GA 197ZK
UT WOS:000322891200002
ER
PT J
AU Hunt, G
AF Hunt, Gene
TI Testing the link between phenotypic evolution and speciation: an
integrated palaeontological and phylogenetic analysis
SO METHODS IN ECOLOGY AND EVOLUTION
LA English
DT Article
DE Punctuated equilibrium; speciation; Poseidonamicus; anagenesis;
cladogenesis
ID MORPHOLOGICAL EVOLUTION; PUNCTUATED EQUILIBRIUM; RANDOM-WALKS; SPECIES
DIVERSIFICATION; QUANTITATIVE GENETICS; GENUS POSEIDONAMICUS; NEOGENE
BRYOZOAN; ATLANTIC SECTOR; TRAIT VARIANCE; SOUTHERN-OCEAN
AB 1. The punctuated equilibrium model predicts that phenotypic change is concentrated into pulses associated with speciation, with little change otherwise accruing in established lineages. Palaeontological tests of this model have generally lacked an adequate phylogenetic and modelling framework, whereas tests relying on extant populations lack direct constraints on the evolutionary dynamics within lineages.
2. This study extends a modelling approach developed in comparative studies and applies it to a clade with a rich fossil record, the deep-sea ostracode genus Poseidonamicus. Using a phylogenetic framework and an independent set of shape traits plus body size, a model was fit that allows estimation of anagenetic (within-lineage) evolution, cladogenetic (speciational) change and geographic variation within species.
3. Maximum-likelihood parameter estimates suggested dominantly speciational change for only one or two shape traits, depending on model assumptions. For the remaining shape traits and body size, the contribution of anagenesis was always substantial. Confidence limits on these solutions were quite broad (although narrower when multiple traits were analysed jointly), with most traits consistent with both strongly anagenetic and strongly cladogenetic change.
4. Whereas uncertainty about phylogenetic topology and species limits has little influence on the conclusions, assuming stasis instead of Brownian motion within lineages shifted support to solutions in which speciational change was more dominant, although several traits remained dominantly explained by anagenetic evolution.
5. These results suggest that for the traits and taxa examined, anagenesis contributes substantially to long-term divergence. The uncertainty in the results highlights the analytical difficulty of decomposing anagenetic and cladogenetic sources of phenotypic evolution, even with fossil constraints. When model uncertainty is taken into account, the task of doing so using observations from entirely extant populations is even more daunting.
C1 Smithsonian Inst, Dept Paleobiol, Natl Museum Nat Hist, Washington, DC 20013 USA.
RP Hunt, G (reprint author), Smithsonian Inst, Dept Paleobiol, Natl Museum Nat Hist, MRC 121,POB 37012, Washington, DC 20013 USA.
EM hunte@si.edu
RI Hunt, Gene/B-3783-2010
OI Hunt, Gene/0000-0001-6430-5020
NR 74
TC 11
Z9 11
U1 1
U2 46
PU WILEY-BLACKWELL
PI HOBOKEN
PA 111 RIVER ST, HOBOKEN 07030-5774, NJ USA
SN 2041-210X
EI 2041-2096
J9 METHODS ECOL EVOL
JI Methods Ecol. Evol.
PD AUG
PY 2013
VL 4
IS 8
BP 714
EP 723
DI 10.1111/2041-210X.12085
PG 10
WC Ecology
SC Environmental Sciences & Ecology
GA 197ZK
UT WOS:000322891200003
ER
PT J
AU Slater, GJ
AF Slater, Graham J.
TI Phylogenetic evidence for a shift in the mode of mammalian body size
evolution at the Cretaceous-Palaeogene boundary
SO METHODS IN ECOLOGY AND EVOLUTION
LA English
DT Article
DE Brownian motion; body size; comparative methods; evolutionary rates;
fossils; macroevolution; mammals; Ornstein-Uhlenbeck
ID CONTINUOUS TRAIT EVOLUTION; FOSSIL RECORD; PHENOTYPIC DIVERSIFICATION;
ECOLOGICAL LIMITS; RADIATION; TREES; EXTINCTION; RATES; TAXA;
RECONSTRUCTION
AB 1. Phylogenetic comparative methods provide a powerful way of addressing classic questions about tempo and mode of phenotypic evolution in the fossil record, such as whether mammals increased in body size diversity after the Cretaceous-Palaeogene (K-Pg) extinction.
2. Most often, these kinds of questions are addressed in the context of variation in evolutionary rates. Shifts in the mode of phenotypic evolution provide an alternative and, in some cases, more realistic explanation for patterns of trait diversity in the fossil record, but these kinds of processes are rarely tested for.
3. In this study, I use a time-calibrated phylogeny of living and fossil Mammaliaformes as a framework to test novel models of body size evolution derived from palaeontological theory. Specifically, I ask whether the K-Pg extinction resulted in a change in rates of body size evolution or release from a constrained adaptive zone.
4. I found that a model comprising an Ornstein-Uhlenbeck process until the K-Pg event and a Brownian motion process from the Cenozoic onwards was the best supported model for these data. Surprisingly, results indicate a lower absolute rate of body size evolution during the Cenozoic than during the Mesozoic. This is explained by release from a stationary OU process that constrained realized disparity. Despite a lower absolute rate, body size disparity has in fact been increasing since the K-Pg event.
5. The use of time-calibrated phylogenies of living and extinct taxa and realistic, process-based models provides unparalleled power in testing evolutionary hypotheses. However, researchers should take care to ensure that the models they use are appropriate to the question being tested and that the parameters estimated are interpreted in the context of the best fitting model.
C1 Smithsonian Inst, Dept Paleobiol, Natl Museum Nat Hist, Washington, DC 20013 USA.
RP Slater, GJ (reprint author), Smithsonian Inst, Dept Paleobiol, Natl Museum Nat Hist, MRC 121,POB 37012, Washington, DC 20013 USA.
EM SlaterG@si.edu
NR 63
TC 56
Z9 56
U1 7
U2 74
PU WILEY-BLACKWELL
PI HOBOKEN
PA 111 RIVER ST, HOBOKEN 07030-5774, NJ USA
SN 2041-210X
J9 METHODS ECOL EVOL
JI Methods Ecol. Evol.
PD AUG
PY 2013
VL 4
IS 8
BP 734
EP 744
DI 10.1111/2041-210X.12084
PG 11
WC Ecology
SC Environmental Sciences & Ecology
GA 197ZK
UT WOS:000322891200005
ER
PT J
AU Woodhams, DC
Brucker, RM
AF Woodhams, Douglas C.
Brucker, Robert M.
TI Disease defence through generations: leaf-cutter ants and their
symbiotic bacteria
SO MOLECULAR ECOLOGY
LA English
DT Editorial Material
DE ant; bacteria; coevolution; microbial ecology; symbiosis
ID MICROBIAL COMMUNITIES; SOCIAL IMMUNITY; ROLES
AB Microbial ecology of animals is taking on significance in the modern dialogue for the biology of species. Similar to a nuclear genome, the entire bacterial assemblage maintains an ancestral signal of the host's evolution leading to cophylogeny between the host and the microbes they harbour (Brucker & Bordenstein 2012b). The stability of such associations is of great interest as they provide a means for species to acquire new traits and genetic diversity that their own genomes lack (McFall-Ngai etal. 2013). The role of gut microbiota, for example, in host health and nutrition is widely recognized and a shared characteristic among animals. The role of bacteria colonizing the outside surfaces of animals is less well understood, but rather than random colonization, these microbes on skin, cuticles, scales and feathers in many cases provide benefits to the host. The symbiosis of leaf-cutter ants, their fungus gardens and their microbiota is a fascinating and complex system. Whether culture-independent bacterial diversity on the cuticle of leaf-cutter ants is high or highly constrained by subcuticular gland secretions is one prominent question. In this issue of Molecular Ecology, Andersen etal. (2013) show that leaf-cutting ants, Acromyrmex echinatior, maintain a dominant and colony-specific bacterium called Pseudonocardia on their cuticles (the laterocervical plates in particular). This bacterium is involved in protecting the ants and their fungal gardens from disease. Other fungus-gardening attine species as well as soil and vegetation can harbour Pseudonocardia. However, it was previously unknown how stable the bacterial strain-ant colony association was through the lifetime of the colony.
C1 [Woodhams, Douglas C.] Univ Colorado, Dept Ecol & Evolutionary Biol, Boulder, CO 80302 USA.
[Woodhams, Douglas C.] Smithsonian Trop Res Inst, Washington, DC 20521 USA.
[Brucker, Robert M.] Vanderbilt Univ, Dept Biol Sci, Nashville, TN 37235 USA.
RP Woodhams, DC (reprint author), Univ Colorado, Dept Ecol & Evolutionary Biol, Boulder, CO 80302 USA.
EM dwoodhams@gmail.com
NR 12
TC 0
Z9 0
U1 3
U2 118
PU WILEY-BLACKWELL
PI HOBOKEN
PA 111 RIVER ST, HOBOKEN 07030-5774, NJ USA
SN 0962-1083
EI 1365-294X
J9 MOL ECOL
JI Mol. Ecol.
PD AUG
PY 2013
VL 22
IS 16
BP 4141
EP 4143
DI 10.1111/mec.12431
PG 3
WC Biochemistry & Molecular Biology; Ecology; Evolutionary Biology
SC Biochemistry & Molecular Biology; Environmental Sciences & Ecology;
Evolutionary Biology
GA 197XQ
UT WOS:000322886400001
PM 23927408
ER
PT J
AU Platais, I
Gosnell, NM
Meibom, S
Kozhurina-Platais, V
Bellini, A
Veillet, C
Burkhead, MS
AF Platais, Imants
Gosnell, Natalie M.
Meibom, Soren
Kozhurina-Platais, Vera
Bellini, Andrea
Veillet, Christian
Burkhead, Martin S.
TI WIYN OPEN CLUSTER STUDY. LV. ASTROMETRY AND MEMBERSHIP IN NGC 6819
SO ASTRONOMICAL JOURNAL
LA English
DT Article
DE astrometry; open clusters and associations: individual (NGC 6819)
ID YOUNG OPEN CLUSTER; XMM-NEWTON; VARIABLE-STARS; PROPER MOTIONS; CCD
PHOTOMETRY; RED GIANTS; KEPLER; CATALOG; FIELD; ASTEROSEISMOLOGY
AB We present proper motions and astrometric membership analysis for 15,750 stars around the intermediate-age open cluster NGC 6819. The accuracy of relative proper motions for well-measured stars ranges from similar to 0.2 mas yr(-1) within 10' of the cluster center to 1.1 mas yr(-1) outside this radius. In the proper motion vector-point diagram, the separation between the cluster members and field stars is convincing down to V similar to 18 and within 10' from the cluster center. The formal sum of membership probabilities indicates a total of similar to 2500 cluster members down to V similar to 22. We confirm the cluster membership of several variable stars, including some eclipsing binaries. The estimated absolute proper motion of NGC 6819 is mu(abs)(x) = -2.6 +/- 0.5 and mu(abs)(y) = -4.2 +/- 0.5 mas yr(-1). A cross-identification between the proper motion catalog and a list of X-ray sources in the field of NGC 6819 resulted in a number of new likely optical counterparts, including a candidate CV. For the first time we show that there is significant differential reddening toward NGC 6819.
C1 [Platais, Imants] Johns Hopkins Univ, Dept Phys & Astron, Baltimore, MD 21218 USA.
[Gosnell, Natalie M.] Univ Wisconsin, Dept Astron, Madison, WI 53706 USA.
[Meibom, Soren] Harvard Smithsonian Ctr Astrophys, Cambridge, MA 02138 USA.
[Kozhurina-Platais, Vera; Bellini, Andrea] Space Telescope Sci Inst, Baltimore, MD 21218 USA.
[Veillet, Christian] Canada France Hawaii Telescope Corp, Kamuela, HI 96743 USA.
[Burkhead, Martin S.] Indiana Univ, Dept Astron, Bloomington, IN 47405 USA.
RP Platais, I (reprint author), Johns Hopkins Univ, Dept Phys & Astron, 3400 North Charles St, Baltimore, MD 21218 USA.
EM imants@pha.jhu.edu
FU National Science Foundation [AST 09-08114]
FX I. Platais gratefully acknowledges support from the National Science
Foundation through grant AST 09-08114 to Johns Hopkins University.
Barbara Anthony-Twarog, Gerhard Auner, Kyle Cudworth, Alison Doane,
Terry Girard, Ted Gull, Jim Hesser, Burt Jones, Irina Kumkova, Arnie
Phifer, Bill Schoening, and John Stauffer are all thanked for permitting
us to digitize their priceless collections of photographic plates.
Robert Spies is thanked for his dedication to restoring and maintaining
the functionality of GAMMA II. Norbert Zacharias and Gary Wycoff are
thanked for their help with the StarScan machine at the US Naval
Observatory. We appreciate a pilot study by Dean McLaughlin on the
dynamical status of NGC 6819. Based on observations obtained at the
Canada-France-Hawaii Telescope (CFHT) which is operated by the National
Research Council of Canada, the Institut National des Sciences de
l'Univers of the Centre National de la Recherche Scientifique of France,
and the University of Hawaii.
NR 38
TC 12
Z9 12
U1 0
U2 1
PU IOP PUBLISHING LTD
PI BRISTOL
PA TEMPLE CIRCUS, TEMPLE WAY, BRISTOL BS1 6BE, ENGLAND
SN 0004-6256
J9 ASTRON J
JI Astron. J.
PD AUG
PY 2013
VL 146
IS 2
AR 43
DI 10.1088/0004-6256/146/2/43
PG 12
WC Astronomy & Astrophysics
SC Astronomy & Astrophysics
GA 183TW
UT WOS:000321841100025
ER
PT J
AU Supple, MA
Hines, HM
Dasmahapatra, KK
Lewis, JJ
Nielsen, DM
Lavoie, C
Ray, DA
Salazar, C
McMillan, WO
Counterman, BA
AF Supple, Megan A.
Hines, Heather M.
Dasmahapatra, Kanchon K.
Lewis, James J.
Nielsen, Dahlia M.
Lavoie, Christine
Ray, David A.
Salazar, Camilo
Owen McMillan, W.
Counterman, Brian A.
TI Genomic architecture of adaptive color pattern divergence and
convergence in Heliconius butterflies
SO GENOME RESEARCH
LA English
DT Article
ID DNA-SEQUENCING DATA; MULLERIAN MIMICRY; WARNING-COLOR; HYBRID ZONES;
NATURAL-SELECTION; RNA-SEQ; EVOLUTION; GENE; POPULATION; ALIGNMENT
AB Identifying the genetic changes driving adaptive variation in natural populations is key to understanding the origins of biodiversity. The mosaic of mimetic wing patterns in Heliconius butterflies makes an excellent system for exploring adaptive variation using next-generation sequencing. In this study, we use a combination of techniques to annotate the genomic interval modulating red color pattern variation, identify a narrow region responsible for adaptive divergence and convergence in Heliconius wing color patterns, and explore the evolutionary history of these adaptive alleles. We use whole genome resequencing from four hybrid zones between divergent color pattern races of Heliconius erato and two hybrid zones of the co-mimic Heliconius melpomene to examine genetic variation across 2.2 Mb of a partial reference sequence. In the intergenic region near optix, the gene previously shown to be responsible for the complex red pattern variation in Heliconius, population genetic analyses identify a shared 65-kb region of divergence that includes several sites perfectly associated with phenotype within each species. This region likely contains multiple cis-regulatory elements that control discrete expression domains of optix. The parallel signatures of genetic differentiation in H. erato and H. melpomene support a shared genetic architecture between the two distantly related co-mimics; however, phylogenetic analysis suggests mimetic patterns in each species evolved independently. Using a combination of next-generation sequencing analyses, we have refined our understanding of the genetic architecture of wing pattern variation in Heliconius and gained important insights into the evolution of novel adaptive phenotypes in natural populations.
C1 [Supple, Megan A.; Salazar, Camilo; Owen McMillan, W.] Smithsonian Trop Res Inst, Panama City, Panama.
[Supple, Megan A.] N Carolina State Univ, Biomath Program, Raleigh, NC 27695 USA.
[Hines, Heather M.; Nielsen, Dahlia M.] N Carolina State Univ, Dept Genet, Raleigh, NC 27695 USA.
[Hines, Heather M.] Penn State Univ, Dept Biol, University Pk, PA 16802 USA.
[Dasmahapatra, Kanchon K.] UCL, Dept Genet Evolut & Environm, London WC1E 6BT, England.
[Dasmahapatra, Kanchon K.] Univ York, Dept Biol, York YO10 5DD, N Yorkshire, England.
[Lewis, James J.] Cornell Univ, Dept Ecol & Evolutionary Biol, Ithaca, NY 14853 USA.
[Lavoie, Christine; Ray, David A.; Counterman, Brian A.] Mississippi State Univ, Dept Biol Sci, Mississippi State, MS 39762 USA.
[Salazar, Camilo] Univ Rosario, Fac Ciencias Nat & Matemat, Bogota, Colombia.
RP Counterman, BA (reprint author), Mississippi State Univ, Dept Biol Sci, Mississippi State, MS 39762 USA.
EM bcounterman@biology.msstate.edu
RI Salazar, camilo/A-1647-2010;
OI Salazar, camilo/0000-0001-9217-6588; Dasmahapatra, Kanchon
Kumar/0000-0002-2840-7019
FU CNRS Nouraugues; NIH [F32 GM889942, T32 HD060555]; NSF [DEB-1257839,
DEB-0844244, DEB-0715096, IOS-1305686]; Smithsonian Institution
FX We wish to thank Claudia Rosales for the tremendous amount of work she
did in the laboratory; Jamie Walters and Chris Jiggins for contributing
sequencing data; and Chris Smith for computational support. We thank
Arnaud Martin, the editor, and three reviewers for their insightful
comments on previous versions of the manuscript. We also thank the
following permitting agencies for permission to collect butterflies:
Peruvian Ministerio de Agricultura and Instituto Nacional de Recursos
Naturales (004-2008-INRENA-IFFS-DCB and 011756-AG-INRENA); Ecuadorian
Ministerio del Ambiente Ecuadorian (013-09 IC-FAU-DNB/MA); French Guiana
Ministere de L'Ecologie, de L'Energie, du Developpemet Durable et de la
Mar (BIODAD-2010-0433); Panamanian Autoridad Nacional del Ambiente
(SC/A-7-11); and Colombian Ministerio de Ambiente, Vivienda y Desarrollo
Territorial (RGE0027-LAM3483). This work was funded by the following
awards: CNRS Nouraugues (B.A.C.); NIH F32 GM889942 (H.M.H.) and T32
HD060555 (J.J.L.); NSF DEB-1257839 (B.A.C.), DEB-0844244 (W.O.M.),
DEB-0715096 (W.O.M.), and IOS-1305686 (J.J.L.); and the Smithsonian
Institution.
NR 63
TC 29
Z9 29
U1 1
U2 79
PU COLD SPRING HARBOR LAB PRESS, PUBLICATIONS DEPT
PI COLD SPRING HARBOR
PA 1 BUNGTOWN RD, COLD SPRING HARBOR, NY 11724 USA
SN 1088-9051
EI 1549-5469
J9 GENOME RES
JI Genome Res.
PD AUG
PY 2013
VL 23
IS 8
BP 1248
EP 1257
DI 10.1101/gr.150615.112
PG 10
WC Biochemistry & Molecular Biology; Biotechnology & Applied Microbiology;
Genetics & Heredity
SC Biochemistry & Molecular Biology; Biotechnology & Applied Microbiology;
Genetics & Heredity
GA 193RS
UT WOS:000322579800005
PM 23674305
ER
PT J
AU Bose, S
Kumar, B
Sutaria, F
Kumar, B
Roy, R
Bhatt, VK
Pandey, SB
Chandola, HC
Sagar, R
Misra, K
Chakraborti, S
AF Bose, Subhash
Kumar, Brijesh
Sutaria, Firoza
Kumar, Brajesh
Roy, Rupak
Bhatt, V. K.
Pandey, S. B.
Chandola, H. C.
Sagar, Ram
Misra, Kuntal
Chakraborti, Sayan
TI Supernova 2012aw-a high-energy clone of archetypal Type IIP SN 1999em
SO MONTHLY NOTICES OF THE ROYAL ASTRONOMICAL SOCIETY
LA English
DT Article
DE supernovae: general; supernovae: individual: SN 2012aw; supernovae:
individual: SN 1999em; supernovae: individual: SN 1999gi; supernovae:
individual: SN 2004et; galaxies: individual: NGC 3551
ID CORE-COLLAPSE SUPERNOVAE; O-I LAMBDA-LAMBDA-6300; PLATEAU SUPERNOVAE;
LIGHT CURVES; QUANTITATIVE SPECTROSCOPY; HYDRODYNAMICAL MODELS;
PHYSICAL-PROPERTIES; SPECTRAL-ANALYSIS; STANDARD STARS; DUST FORMATION
AB We present densely sampled UBVRI/griz photometric and low-resolution (6-10 A) optical spectroscopic observations from 4 to 270 d after explosion of a newly discovered Type II SN 2012aw in a nearby (similar to 9.9 Mpc) galaxy M95. The light-curve characteristics of apparent magnitudes, colours, bolometric luminosity and the presence and evolution of prominent spectral features are found to have striking similarity with the archetypal IIP SNe 1999em, 1999gi and 2004et. The early time observations of SN 2012aw clearly detect minima in the light curve of V, R and I bands near 37 d after explosion and this we suggest to be an observational evidence for emergence of recombination phase. The mid-plateau M-V magnitude (-16.67 +/- 0.04) lies in between the bright (similar to-18) and subluminous (similar to-15) IIP SNe. The mass of nickel is 0.06 +/- 0.01 M-circle dot. The synow modelling of spectra indicate that the value and evolution of the photospheric velocity is similar to SN 2004et, but about similar to 600 km s(-1) higher than that of SNe 1999em and 1999gi at comparable epochs. This trend is more apparent in the line velocities of H alpha and H beta. A comparison of ejecta velocity properties with that of existing radiation-hydrodynamical simulations indicate that the energy of explosion lies in the range 1-2 x 10(51) ergs; a further comparison of nebular phase [O i] doublet luminosity with SNe 2004et and 1987A indicate that the mass of progenitor star is about 14 to 15 M-circle dot. The presence of high-velocity absorption features in the mid-to-late plateau and possibly in early phase spectra show signs of interaction between ejecta and the circumstellar matter; being consistent with its early time detection at X-ray and radio wavebands.
C1 [Bose, Subhash; Kumar, Brijesh; Kumar, Brajesh; Roy, Rupak; Bhatt, V. K.; Pandey, S. B.; Sagar, Ram; Misra, Kuntal] Aryabhatta Res Inst Observat Sci, Naini Tal 263002, India.
[Sutaria, Firoza] Indian Inst Astrophys, Bangalore 560034, Karnataka, India.
[Kumar, Brajesh] Univ Liege, Inst Astrophys & Geophys, B-4000 Liege, Belgium.
[Chandola, H. C.] Kumaun Univ, Dept Phys, Naini Tal 263002, India.
[Chakraborti, Sayan] Harvard Smithsonian Ctr Astrophys, Inst Theory & Computat, Cambridge, MA 02138 USA.
RP Bose, S (reprint author), Aryabhatta Res Inst Observat Sci, Naini Tal 263002, India.
EM email@subhashbose.com
NR 102
TC 27
Z9 27
U1 0
U2 0
PU OXFORD UNIV PRESS
PI OXFORD
PA GREAT CLARENDON ST, OXFORD OX2 6DP, ENGLAND
SN 0035-8711
J9 MON NOT R ASTRON SOC
JI Mon. Not. Roy. Astron. Soc.
PD AUG
PY 2013
VL 433
IS 3
BP 1871
EP 1891
DI 10.1093/mnras/stt864
PG 21
WC Astronomy & Astrophysics
SC Astronomy & Astrophysics
GA 191HK
UT WOS:000322403800008
ER
PT J
AU Nava, L
Sironi, L
Ghisellini, G
Celotti, A
Ghirlanda, G
AF Nava, L.
Sironi, L.
Ghisellini, G.
Celotti, A.
Ghirlanda, G.
TI Afterglow emission in gamma-ray bursts - I. Pair-enriched ambient medium
and radiative blast waves
SO MONTHLY NOTICES OF THE ROYAL ASTRONOMICAL SOCIETY
LA English
DT Article
DE gamma-ray burst: general; X-rays: general
ID HIGH-ENERGY EMISSION; LORENTZ-FACTOR; LIGHT CURVES; GRB 090510;
DYNAMICAL MODEL; FLUID-DYNAMICS; FIREBALL MODEL; SHOCK ORIGIN; ONSET;
FERMI
AB Forward shocks caused by the interaction between a relativistic blast wave and the circumburst medium are thought to be responsible for the afterglow emission in gamma-ray bursts (GRBs). We consider the hydrodynamics of a spherical relativistic blast wave expanding into the surrounding medium and we generalize the standard theory in order to account for several effects that are generally ignored. In particular, we consider the role of adiabatic and radiative losses in the hydrodynamical evolution of the shock, under the assumption that the cooling losses are fast. Our model can describe adiabatic, fully radiative and semiradiative blast waves, and can describe the effects of a time-varying radiative efficiency. The equations we present are valid for arbitrary density profiles, and also for a circumburst medium enriched with electron-positron pairs. The presence of pairs enhances the fraction of shock energy gained by the leptons, thus increasing the importance of radiative losses. Our model allows us to study whether the high-energy (> 0.1 GeV) emission in GRBs may originate from afterglow radiation. In particular, it is suitable to test whether the fast decay of the high-energy light curve observed in several Fermi Large Area Telescope GRBs can be ascribed to an initial radiative phase, followed by the standard adiabatic evolution.
C1 [Nava, L.] Univ Paris Diderot, APC, CNRS IN2P3, CEA Irfu,Obs Paris, Sorbonne Paris Cite, France.
[Sironi, L.] Harvard Smithsonian Ctr Astrophys, Cambridge, MA 02138 USA.
[Ghisellini, G.; Celotti, A.; Ghirlanda, G.] Osserv Astron Brera, INAF, I-23807 Merate, Italy.
[Celotti, A.] SISSA, I-34136 Trieste, Italy.
RP Nava, L (reprint author), Univ Paris Diderot, APC, CNRS IN2P3, CEA Irfu,Obs Paris, Sorbonne Paris Cite, France.
EM lara.nava@apc.univ-paris7.fr
OI Ghirlanda, Giancarlo/0000-0001-5876-9259; Ghisellini,
Gabriele/0000-0002-0037-1974
FU NASA [PF1-120090, NAS8-03060]; Chandra X-ray Center; PRIN-INAF grant
FX LN thanks SISSA and INAF-Osservatorio Astronomico di Brera for the kind
hospitality during the completion of this work. LS gratefully thanks the
Osservatorio Astronomico di Brera - Merate for hospitality and
stimulating discussions. LN is also grateful to Pawan Kumar for helpful
discussions. LS is supported by NASA through Einstein Postdoctoral
Fellowship grant number PF1-120090 awarded by the Chandra X-ray Center,
which is operated by the Smithsonian Astrophysical Observatory for NASA
under contract NAS8-03060. We acknowledge the 2011 PRIN-INAF grant for
financial support.
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J9 MON NOT R ASTRON SOC
JI Mon. Not. Roy. Astron. Soc.
PD AUG
PY 2013
VL 433
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BP 2107
EP 2121
DI 10.1093/mnras/stt872
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WC Astronomy & Astrophysics
SC Astronomy & Astrophysics
GA 191HK
UT WOS:000322403800029
ER
PT J
AU Sadowski, A
Narayan, R
Sironi, L
Ozel, F
AF Sadowski, Aleksander
Narayan, Ramesh
Sironi, Lorenzo
Oezel, Feryal
TI Location of the bow shock ahead of cloud G2 at the Galactic Centre
SO MONTHLY NOTICES OF THE ROYAL ASTRONOMICAL SOCIETY
LA English
DT Article
DE acceleration of particles; accretion, accretion discs; black hole
physics; radiation mechanisms: non-thermal
ID SGR A-ASTERISK; SUPERMASSIVE BLACK-HOLE; ACCRETION FLOW; SAGITTARIUS-A;
GRMHD SIMULATIONS; GAS; DYNAMICS; SCHEME; MODELS; GALAXY
AB We perform detailed magnetohydrodynamic simulations of the gas cloud G2 interacting with the accretion flow around the Galactic Centre black hole Sgr A*. We take as our initial conditions a steady-state, converged solution of the accretion flow obtained earlier using the general-relativistic magnetohydrodynamic code harm. Using the observed parameters for the cloud's orbit, we compute the interaction of the cloud with the ambient gas and identify the shock structure that forms ahead of the cloud. We show that for many configurations, the cloud front crosses the orbit pericentre seven to nine months earlier than the centre-of-mass.
C1 [Sadowski, Aleksander; Narayan, Ramesh; Sironi, Lorenzo; Oezel, Feryal] Harvard Smithsonian Ctr Astrophys, Cambridge, MA 02138 USA.
[Oezel, Feryal] Univ Arizona, Tucson, AZ 85721 USA.
RP Sadowski, A (reprint author), Harvard Smithsonian Ctr Astrophys, 60 Garden St, Cambridge, MA 02138 USA.
EM asadowski@cfa.harvard.edu; rnarayan@cfa.harvard.edu;
lsironi@cfa.harvard.edu; fozel@email.arizona.edu
OI Narayan, Ramesh/0000-0002-1919-2730
FU NASA [NNX11AE16G, PF1-120090, NAS8-03060]; Chandra X-ray Center; NSF
[AST-1108753]; Radcliffe Institute for Advanced Study at Harvard
University; [TG-AST120010]
FX AS and RN were supported in part by NASA grant NNX11AE16G. LS is
supported by NASA through Einstein Postdoctoral Fellowship grant number
PF1-120090 awarded by the Chandra X-ray Center, which is operated by the
Smithsonian Astrophysical Observatory for NASA under contract
NAS8-03060. FO acknowledges support from NSF grant AST-1108753 and from
the Radcliffe Institute for Advanced Study at Harvard University. The
simulations were performed on XSEDE resources under contract No.
TG-AST120010 and on NASA High-End Computing (HEC) resources through the
NASA Advanced Supercomputing (NAS) Division at Ames Research Center.
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JI Mon. Not. Roy. Astron. Soc.
PD AUG
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BP 2165
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DI 10.1093/mnras/stt879
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WC Astronomy & Astrophysics
SC Astronomy & Astrophysics
GA 191HK
UT WOS:000322403800033
ER
PT J
AU Brightman, M
Silverman, JD
Mainieri, V
Ueda, Y
Schramm, M
Matsuoka, K
Nagao, T
Steinhardt, C
Kartaltepe, J
Sanders, DB
Treister, E
Shemmer, O
Brandt, WN
Brusa, M
Comastri, A
Ho, LC
Lanzuisi, G
Lusso, E
Nandra, K
Salvato, M
Zamorani, G
Akiyama, M
Alexander, DM
Bongiorno, A
Capak, P
Civano, F
Del Moro, A
Doi, A
Elvis, M
Hasinger, G
Laird, ES
Masters, D
Mignoli, M
Ohta, K
Schawinski, K
Taniguchi, Y
AF Brightman, M.
Silverman, J. D.
Mainieri, V.
Ueda, Y.
Schramm, M.
Matsuoka, K.
Nagao, T.
Steinhardt, C.
Kartaltepe, J.
Sanders, D. B.
Treister, E.
Shemmer, O.
Brandt, W. N.
Brusa, M.
Comastri, A.
Ho, L. C.
Lanzuisi, G.
Lusso, E.
Nandra, K.
Salvato, M.
Zamorani, G.
Akiyama, M.
Alexander, D. M.
Bongiorno, A.
Capak, P.
Civano, F.
Del Moro, A.
Doi, A.
Elvis, M.
Hasinger, G.
Laird, E. S.
Masters, D.
Mignoli, M.
Ohta, K.
Schawinski, K.
Taniguchi, Y.
TI A statistical relation between the X-ray spectral index and Eddington
ratio of active galactic nuclei in deep surveys
SO MONTHLY NOTICES OF THE ROYAL ASTRONOMICAL SOCIETY
LA English
DT Article
DE accretion; accretion discs; galaxies: active; galaxies: nuclei; quasars:
emission lines; quasars: general; X-rays: galaxies
ID FIELD-SOUTH SURVEY; SEYFERT 1 GALAXIES; NEWTON QUASAR SURVEY; MS SOURCE
CATALOGS; BLACK-HOLE MASSES; COSMOS SURVEY; XMM-COSMOS; EMISSION-LINE;
DATA RELEASE; LUMINOSITY
AB We present an investigation into how well the properties of the accretion flow on to a supermassive black hole may be coupled to those of the overlying hot corona. To do so, we specifically measure the characteristic spectral index, Gamma, of a power-law energy distribution, over an energy range of 2-10 keV, for X-ray selected, broad-lined radio-quiet active galactic nuclei (AGN) up to z similar to 2 in Cosmic Evolution Survey (COSMOS) and Extended Chandra Deep Field South (E-CDF-S). We test the previously reported dependence between Gamma and black hole mass, full width at half-maximum (FWHM) and Eddington ratio using a sample of AGN covering a broad range in these parameters based on both the Mg ii and H alpha emission lines with the later afforded by recent near-infrared spectroscopic observations using Subaru/Fibre Multi Object Spectrograph. We calculate the Eddington ratios, lambda(Edd), for sources where a bolometric luminosity (L-Bol) has been presented in the literature, based on spectral energy distribution fitting, or, for sources where these data do not exist, we calculate L-Bol using a bolometric correction to the X-ray luminosity, derived from a relationship between the bolometric correction and L-X/L-3000. From a sample of 69 X-ray bright sources (> 250 counts), where Gamma can be measured with greatest precision, with an estimate of L-Bol, we find a statistically significant correlation between Gamma and lambda(Edd), which is highly significant with a chance probability of 6.59x 10(-8). A statistically significant correlation between Gamma and the FWHM of the optical lines is confirmed, but at lower significance than with lambda(Edd) indicating that lambda(Edd) is the key parameter driving conditions in the corona. Linear regression analysis reveals that Gamma = (0.32 +/- 0.05) log(10)lambda(Edd) + (2.27 +/- 0.06) and Gamma = (-0.69 +/- 0.11) log(10)(FWHM/km s(-1)) + (4.44 +/- 0.42). Our results on Gamma-lambda(Edd) are in very good agreement with previous results. While the Gamma-lambda(Edd) relationship means that X-ray spectroscopy may be used to estimate black hole accretion rate, considerable dispersion in the correlation does not make this viable for single sources, however could be valuable for large X-ray spectral samples, such as those to be produced by eROSITA.
C1 [Brightman, M.; Brusa, M.; Lanzuisi, G.; Nandra, K.; Salvato, M.; Bongiorno, A.] Max Planck Inst Extraterr Phys, D-85748 Garching, Germany.
[Silverman, J. D.; Schramm, M.; Steinhardt, C.] Univ Tokyo, Todai Inst Adv Study, Kavli Inst Phys & Math Universe WPI, Chiba 2778583, Japan.
[Mainieri, V.] European So Observ, D-85748 Garching, Germany.
[Ueda, Y.; Nagao, T.; Ohta, K.] Kyoto Univ, Dept Astron, Sakyo Ku, Kyoto 6068502, Japan.
[Matsuoka, K.] Seoul Natl Univ, Dept Phys & Astron, Seoul 151742, South Korea.
[Matsuoka, K.; Taniguchi, Y.] Ehime Univ, Res Ctr Space & Cosm Evolut, Matsuyama, Ehime 7908577, Japan.
[Nagao, T.] Kyoto Univ, Hakubi Ctr Adv Res, Sakyo Ku, Kyoto 6068302, Japan.
[Kartaltepe, J.] Natl Opt Astron Observ, Tucson, AZ 85719 USA.
[Sanders, D. B.; Hasinger, G.] Univ Hawaii, Inst Astron, Honolulu, HI 96822 USA.
[Treister, E.] Univ Concepcion, Dept Astron, Concepcion, Chile.
[Shemmer, O.] Univ N Texas, Dept Phys, Denton, TX 76203 USA.
[Brandt, W. N.] Penn State Univ, Dept Astron & Astrophys, University Pk, PA 16802 USA.
[Brusa, M.] Univ Bologna, Dipartimento Fis & Astron, I-40127 Bologna, Italy.
[Brusa, M.; Comastri, A.; Zamorani, G.; Mignoli, M.] Osservatorio Astron Bologna, INAF, I-40127 Bologna, Italy.
[Ho, L. C.; Masters, D.] Observ Carnegie Inst Sci, Pasadena, CA 91101 USA.
[Lusso, E.] Max Planck Inst Astron, D-69117 Heidelberg, Germany.
[Akiyama, M.] Tohoku Univ, Astron Inst, Aoba Ku, Sendai, Miyagi 9808578, Japan.
[Alexander, D. M.; Del Moro, A.] Univ Durham, Dept Phys, Durham DH1 3LE, England.
[Bongiorno, A.] Osserv Astron Roma, INAF, I-00040 Monte Porzio Catone, Italy.
[Capak, P.] CALTECH, NASA, JPL Spitzer Sci Ctr, Pasadena, CA 91125 USA.
[Civano, F.; Elvis, M.] Harvard Smithsonian Ctr Astrophys, Cambridge, MA 02138 USA.
[Doi, A.] Japan Aerosp Explorat Agcy, Inst Space & Astronaut Sci, Chuou Ku, Sagamihara, Kanagawa 2525210, Japan.
[Laird, E. S.] Univ London Imperial Coll Sci Technol & Med, Blackett Lab, Astrophys Grp, London SW7 2AZ, England.
[Schawinski, K.] Yale Univ, Dept Phys, New Haven, CT 06520 USA.
RP Brightman, M (reprint author), Max Planck Inst Extraterr Phys, Giessenbachstr 1, D-85748 Garching, Germany.
EM mbright@mpe.mpg.de
RI Lanzuisi, Giorgio/K-4378-2013; Brandt, William/N-2844-2015; Mignoli,
Marco/O-9426-2015; Comastri, Andrea/O-9543-2015;
OI Lanzuisi, Giorgio/0000-0001-9094-0984; Alexander,
David/0000-0002-5896-6313; Brandt, William/0000-0002-0167-2453; Mignoli,
Marco/0000-0002-9087-2835; Comastri, Andrea/0000-0003-3451-9970;
Bongiorno, Angela/0000-0002-0101-6624; Shemmer,
Ohad/0000-0003-4327-1460; Schawinski, Kevin/0000-0001-5464-0888;
Zamorani, Giovanni/0000-0002-2318-301X
FU Japan Society for the Promotion of Science (JSPS)
FX The authors would like to thank the anonymous referee for the careful
reading and constructive criticism of our manuscript. The authors would
also like to thank the builders and operators of XMM-Newton and Chandra
and all those involved in the COSMOS and E-CDF-S surveys. MB would like
to acknowledge the financial support at the start of this project from
the Japan Society for the Promotion of Science (JSPS).
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SC Astronomy & Astrophysics
GA 191HK
UT WOS:000322403800059
ER
PT J
AU Kurokawa, H
Kaltenegger, L
AF Kurokawa, H.
Kaltenegger, L.
TI Atmospheric mass-loss and evolution of short-period exoplanets: the
examples of CoRoT-7b and Kepler-10b
SO MONTHLY NOTICES OF THE ROYAL ASTRONOMICAL SOCIETY
LA English
DT Article
DE planets and satellites: atmospheres; planets and satellites:
composition; planets and satellites: individual: CoRoT-7b; planets and
satellites: individual: Kepler-10b; planets and satellites: physical
evolution; stars: activity
ID HOT JUPITERS; SUPER-EARTHS; PLANETARY-ATMOSPHERES; EXTRASOLAR PLANETS;
LUMINOSITY; NEPTUNES; DWARFS; SYSTEM; STARS; TIME
AB Short-period exoplanets potentially lose envelope masses during their evolution because of atmospheric escape caused by the intense X-ray and extreme UV (XUV) radiation from their host stars. We develop a combined model of atmospheric mass-loss calculation and thermal evolution calculation of a planet to simulate its evolution and explore the dependences on the formation history of the planet. Thermal atmospheric escape as well as the Roche lobe overflow contributes to mass-loss. The maximum initial planetary model mass depends primarily on the assumed evolution model of the stellar XUV luminosity. We adapt the model to CoRoT-7b and Kepler-10b to explore the evolution of both planets and the maximum initial mass of these planets. We take the recent X-ray observation of CoRoT-7 into account and explore the effect of different XUV evolution models on the planetary initial mass. Our calculations indicate that both hot super-Earths could be remnants of Jupiter-mass gas planets.
C1 [Kurokawa, H.] Nagoya Univ, Dept Phys, Chikusa Ku, Nagoya, Aichi 4648602, Japan.
[Kurokawa, H.] Tokyo Inst Technol, Dept Earth & Planetary Sci, Meguro Ku, Tokyo 1528551, Japan.
[Kurokawa, H.; Kaltenegger, L.] Max Planck Inst Astron, D-69117 Heidelberg, Germany.
[Kaltenegger, L.] Harvard Smithsonian Ctr Astrophys, Cambridge, MA 02138 USA.
RP Kurokawa, H (reprint author), Nagoya Univ, Dept Phys, Chikusa Ku, Furo Cho, Nagoya, Aichi 4648602, Japan.
EM kurokawa@geo.titech.ac.jp
OI Kurokawa, Hiroyuki/0000-0003-1965-1586
FU DFG [ENP Ka 3142/1-1]; Global COE programme "From the Earth to Earths";
Ministry of Education, Culture, Sports, Science and Technology (MEXT) of
Japan [23244027]
FX The authors acknowledge support from DFG funding ENP Ka 3142/1-1. This
work is also supported by Global COE programme "From the Earth to
Earths" and Grants-in-Aid from the Ministry of Education, Culture,
Sports, Science and Technology (MEXT) of Japan (23244027). The authors
also acknowledge Professor J. Zuluaga for fruitful discussions on the
different XUV models and Dr C. Mordasini for input for the equation of
state of solar composition gas. The authors appreciate the referee of
this paper for many fruitful suggestions.
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JI Mon. Not. Roy. Astron. Soc.
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SC Astronomy & Astrophysics
GA 191IF
UT WOS:000322405900036
ER
PT J
AU Chuang, CH
Prada, F
Cuesta, AJ
Eisenstein, DJ
Kazin, E
Padmanabhan, N
Sanchez, AG
Xu, XY
Beutler, F
Manera, M
Schlegel, DJ
Schneider, DP
Weinberg, DH
Brinkmann, J
Brownstein, JR
Thomas, D
AF Chuang, Chia-Hsun
Prada, Francisco
Cuesta, Antonio J.
Eisenstein, Daniel J.
Kazin, Eyal
Padmanabhan, Nikhil
Sanchez, Ariel G.
Xu, Xiaoying
Beutler, Florian
Manera, Marc
Schlegel, David J.
Schneider, Donald P.
Weinberg, David H.
Brinkmann, Jon
Brownstein, Joel R.
Thomas, Daniel
TI The clustering of galaxies in the SDSS-III Baryon Oscillation
Spectroscopic Survey: single-probe measurements and the strong power of
f(z)Sigma(8)(z) on constraining dark energy
SO MONTHLY NOTICES OF THE ROYAL ASTRONOMICAL SOCIETY
LA English
DT Article
DE cosmological parameters; cosmology: observations; distance scale;
large-scale structure of Universe
ID DIGITAL SKY SURVEY; LUMINOUS RED GALAXIES; 2-POINT CORRELATION-FUNCTION;
REDSHIFT-SPACE DISTORTIONS; DATA RELEASE; ACOUSTIC-OSCILLATIONS;
COSMOLOGICAL IMPLICATIONS; TO 0.5; SCALE; SAMPLE
AB We present measurements of the anisotropic galaxy clustering from the Data Release 9 (DR9) CMASS sample of the Sloan Digital Sky Survey (SDSS)-III Baryon Oscillation Spectroscopic Survey (BOSS). We analyse the broad-range shape of the monopole and quadrupole correlation functions to obtain constraints, at the effective redshift z = 0.57 of the sample, on the Hubble expansion rate H(z), the angular-diameter distance D-A(z), the normalized growth rate f (z)Sigma(8)(z), the physical matter density (m)h(2), and the biased amplitude of matter fluctuation b Sigma(8)(z). We obtain H(0.57), D-A(0.57), f (0.57)Sigma(8)(0.57), (m)h(2), b Sigma(8)(0.57) = 87.6_-6.8 boolean AND+6.7 kms(-1) Mpc(-1), 1396 +/- 73 Mpc, 0.428 +/- 0.066,0.126_-0.010+0.008, 1.19 +/- 0.14} and their covariance matrix as well. The parameters which are not well constrained by our galaxy clustering analysis are marginalized over with wide flat priors. Since no priors from other data sets [i.e. cosmic microwave background (CMB)] are adopted and no dark energy models are assumed, our results from BOSS CMASS galaxy clustering alone may be combined with other data sets, i.e. CMB, SNe, lensing or other galaxy clustering data to constrain the parameters of a given cosmological model. We show that the major power on constraining dark energy from the anisotropic galaxy clustering signal, as compared to the angular-averaged one (monopole), arises from including the normalized growth rate f (z)Sigma(8)(z). In the case of the cosmological model assuming a constant dark energy equation of state and a flat universe (wCDM), our single-probe CMASS constraints, combined with CMB (WMAP9+SPT), yield a value for the dark energy equation-of-state parameter of w = -0.90 +/- 0.11. Therefore, it is important to include f (z)Sigma(8)(z) while investigating the nature of dark energy with current and upcoming large-scale galaxy surveys.
C1 [Chuang, Chia-Hsun; Prada, Francisco] Univ Autonoma Madrid, CSIC, Inst Fis Teor, E-28049 Madrid, Spain.
[Prada, Francisco] Univ Autonoma Madrid, CSIC, E-28049 Madrid, Spain.
[Prada, Francisco] CSIC, Inst Astrofis Andalucia, E-18080 Granada, Spain.
[Cuesta, Antonio J.; Padmanabhan, Nikhil] Yale Univ, Dept Phys, New Haven, CT 06520 USA.
[Eisenstein, Daniel J.] Harvard Smithsonian Ctr Astrophys, Cambridge, MA 02138 USA.
[Kazin, Eyal] Swinburne Univ Technol, Ctr Astrophys & Supercomp, Hawthorn, Vic 3122, Australia.
[Sanchez, Ariel G.] Max Planck Inst Extraterr Phys, D-85741 Garching, Germany.
[Xu, Xiaoying] Carnegie Mellon Univ, Dept Phys, Pittsburgh, PA 15213 USA.
[Beutler, Florian; Schlegel, David J.] Univ Calif Berkeley, Lawrence Berkeley Natl Lab, Berkeley, CA 94720 USA.
[Manera, Marc; Thomas, Daniel] Univ Portsmouth, Inst Cosmol & Gravitat, Portsmouth PO1 3FX, Hants, England.
[Schneider, Donald P.] Penn State Univ, Dept Astron & Astrophys, University Pk, PA 16802 USA.
[Schneider, Donald P.] Penn State Univ, Inst Gravitat & Cosmos, University Pk, PA 16802 USA.
[Weinberg, David H.] Ohio State Univ, Dept Astron, Columbus, OH 43210 USA.
[Weinberg, David H.] Ohio State Univ, CCAPP, Columbus, OH 43210 USA.
[Brinkmann, Jon] Apache Point Observ, Sunspot, NM 88349 USA.
[Brownstein, Joel R.] Univ Utah, Dept Phys & Astron, Salt Lake City, UT 84112 USA.
RP Chuang, CH (reprint author), Univ Autonoma Madrid, CSIC, Inst Fis Teor, E-28049 Madrid, Spain.
EM chuang@nhn.ou.edu
FU Spanish MICINN [MultiDarkCSD2009-00064, AYA201021231- C02-01]; Comunidad
de Madrid [HEPHACOS S2009/ESP-1473]; NASA Office of Space Science; ICG;
SEPNet; University of Portsmouth; Alfred P. Sloan Foundation; National
Science Foundation; U.S. Department of Energy Office of Science;
University of Arizona; Brookhaven National Laboratory; University of
Cambridge; Carnegie Mellon University; University of Florida; Harvard
University; Instituto de Astrofisica de Canarias; Johns Hopkins
University; Lawrence Berkeley National Laboratory; Max Planck Institute
for Astrophysics; Max Planck Institute for Extraterrestrial Physics; New
Mexico State University; New York University; Ohio State University;
Pennsylvania State University; Princeton University; University of
Tokyo; University of Utah; Vanderbilt University; University of
Virginia; University of Washington; Yale University
FX We would like to thank Graeme Addison, Chris Blake, Ryan Keisler, Savvas
Nesseris, Christian Reichardt, Beth Reid, Lado Samushia and Kyle Story
for useful discussions. CC and FP acknowledge support from the Spanish
MICINN Consolider-Ingenio 2010 Programme under grant
MultiDarkCSD2009-00064 andAYA201021231- C02-01 grant. CC and FP were
also supported by the Comunidad de Madrid under grant HEPHACOS
S2009/ESP-1473.; We acknowledge the use of the Legacy Archive for
Microwave Background Data Analysis (LAMBDA). Support for LAMBDA is
provided by the NASA Office of Space Science. The mock catalogues used
were produced in SCIAMA High Performance Supercomputer (HPC) cluster,
supported by the ICG, SEPNet and the University of Portsmouth.; Funding
for SDSS-III has been provided by the Alfred P. Sloan Foundation, the
Participating Institutions, the National Science Foundation and the U.S.
Department of Energy Office of Science. The SDSS-III web site is
http://www.sdss3.org/.; SDSS-III is managed by the Astrophysical
Research Consortium for the Participating Institutions of the SDSS-III
Collaboration including the University of Arizona, the Brazilian
Participation Group, Brookhaven National Laboratory, University of
Cambridge, Carnegie Mellon University, University of Florida, the French
Participation Group, the German Participation Group, Harvard University,
the Instituto de Astrofisica de Canarias, the Michigan State/Notre
Dame/JINA Participation Group, Johns Hopkins University, Lawrence
Berkeley National Laboratory, Max Planck Institute for Astrophysics, Max
Planck Institute for Extraterrestrial Physics, New Mexico State
University, New York University, Ohio State University, Pennsylvania
State University, University of Portsmouth, Princeton University, the
Spanish Participation Group, University of Tokyo, University of Utah,
Vanderbilt University, University of Virginia, University of Washington
and Yale University.
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DI 10.1093/mnras/stt988
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SC Astronomy & Astrophysics
GA 191IF
UT WOS:000322405900063
ER
PT J
AU Potts, R
AF Potts, Richard
TI Hominin evolution in settings of strong environmental variability
SO QUATERNARY SCIENCE REVIEWS
LA English
DT Review
DE Paleoclimate; Human evolution; Adaptability; Variability selection;
Olorgesailie; Africa; Environment
ID SOUTHERN KENYA RIFT; PLEISTOCENE OLORGESAILIE FORMATION; PLIOPLEISTOCENE
AFRICAN CLIMATE; LARGE MAMMAL FAUNAS; EAST-AFRICA; TURKANA BASIN;
PALEOSOL CARBONATES; TROPICAL AFRICA; LATE NEOGENE; STONE TOOLS
AB Investigations into how climate change shaped human evolution have begun to focus on environmental dynamics, i.e., the nature and tempo of climate and landscape variability, an approach that de-emphasizes static reconstructions of early hominin habitats. The interaction among insolation cycles is especially apparent in the paleoenvironmental records of the East African Rift System, where the longest records of human evolution are preserved. However, environmental indicators such as deep-sea oxygen isotopes, terrestrial dust flux, paleosol carbon isotopes, and lake sediments do not point consistently to any simple trend or climate driver of evolutionary change. Comparison of environmental indicators cautions against an exclusive focus on any given end-member of environmental fluctuation (driest or wettest, warmest or coolest), and argues for the impact of the entire range of variability in shaping evolutionary change. A model of alternating high and low climate variability for tropical Africa further implies that specific environmental indicators reflect different aspects of East African environmental dynamics. The model may thus help reconcile some of the conflicting interpretations about the environmental drivers of hominin evolution. First and last appearances of hominin lineages, benchmark biogeographic events, and the emergence of key adaptations and capacities to alter the surroundings are consistently concentrated in the predicted longest intervals of high climate variability. The view that emerges is that important changes in stone technology, sociality, and other aspects of hominin behavior can now be understood as adaptive responses to heightened habitat instability. Published by Elsevier Ltd.
C1 Smithsonian Inst, Natl Museum Nat Hist, Human Origins Program, Washington, DC 20013 USA.
RP Potts, R (reprint author), Smithsonian Inst, Natl Museum Nat Hist, Human Origins Program, Washington, DC 20013 USA.
EM pottsr@si.edu
FU Peter Buck Fund for Human Origins Research; Ruth and Vernon Taylor
Foundation; NSF HOMINID Program [BCS-0218511]
FX I am grateful to many colleagues for their collaboration and shared data
over the past decade, particularly Kay Behrensmeyer, Alan Deino, Peter
deMenocal, Craig Feibel, and Bernie Owen. Research reported here was
supported by the Peter Buck Fund for Human Origins Research, the Ruth
and Vernon Taylor Foundation, and NSF HOMINID Program (BCS-0218511). The
Olorgesailie fieldwork is a collaborative project of the National
Museums of Kenya; I especially thank I.O. Farah, E. Mbua, F.K. Manthi,
and M. Muungu of the NMK for their permissions and logistical support. I
am grateful to Jennifer Clark for help in preparing the figures. The
manuscript was improved by comments from reviewers, including M.H.
Trauth. This is a publication of the Smithsonian's Human Origins
Program.
NR 108
TC 43
Z9 44
U1 15
U2 119
PU PERGAMON-ELSEVIER SCIENCE LTD
PI OXFORD
PA THE BOULEVARD, LANGFORD LANE, KIDLINGTON, OXFORD OX5 1GB, ENGLAND
SN 0277-3791
J9 QUATERNARY SCI REV
JI Quat. Sci. Rev.
PD AUG 1
PY 2013
VL 73
BP 1
EP 13
DI 10.1016/j.quascirev.2013.04.003
PG 13
WC Geography, Physical; Geosciences, Multidisciplinary
SC Physical Geography; Geology
GA 190QX
UT WOS:000322356400001
ER
PT J
AU Baeza, JA
Fuentes, MS
AF Antonio Baeza, J.
Fuentes, M. Soledad
TI Exploring phylogenetic informativeness and nuclear copies of
mitochondrial DNA (numts) in three commonly used mitochondrial genes:
mitochondrial phylogeny of peppermint, cleaner, and semi-terrestrial
shrimps (Caridea: Lysmata, Exhippolysmata, and Merguia)
SO ZOOLOGICAL JOURNAL OF THE LINNEAN SOCIETY
LA English
DT Article
DE Exhippolysmata; hermaphrodite; Hippolytidae; Merguia; ornamental
ID PROTANDRIC SIMULTANEOUS HERMAPHRODITISM; MARINE SHRIMP;
SPECTRAL-ANALYSIS; SOCIAL MONOGAMY; MOLECULAR PHYLOGENY; DECAPOD
CRUSTACEANS; WURDEMANNI CARIDEA; SEX ALLOCATION; CONTROL REGION; GENUS
ALPHEUS
AB Of paramount importance to studies that profit from molecular trees is the accuracy and robustness of the reconstructed phylogenies. Causes of systematic error that can mislead phylogenetic methods include nuclear copies of mitochondrial DNA (numts) and low phylogenetic informativeness (PI). Herein, numts and PI were explored in three mitochondrial genes commonly used for phylogenetic reconstruction: 16S, 12S, and cytochrome c oxidase I (COI). Shrimps from the genera Lysmata, Exhippolysmata, and Merguia were used as a model system. COI and 12S polymerase chain reaction (PCR) products from various species; (2) double peaks, background noise, and ambiguity in sequence chromatograms of COI and 12SPCR products that produced a single clear band in other species; and (3) indels, stop codons, and considerable composition bias in COI-like cloned sequences of one problematic species (Lysmata seticaudata), was interpreted as evidence of pervasive non-functional nuclear copies of mitochondrial DNA (numts) of the targeted COI (and probably 12S) mtDNA fragment. DNA markers studied was investigated using PI profiling, spectral analysis, and neighbour-nets. Marker-specific PI profiles suggested that the COI marker has the highest information content and greatest power for resolving both shallow and deep nodes in trees depicting the phylogenetic relationship among the species studied. Nonetheless, spectral analysis of splits and neighbour-nets suggested that the 16S and 12S markers were equally or even more powerful than the COI marker for resolving nodes at all phylogenetic levels. Altogether, these analyses suggest that all three mtDNA markers are equally useful for resolving phylogenetic relationships in the shrimps studied, and that PI profiling is not necessarily useful to estimate overall gene utility. A total-evidence' phylogenetic analysis that included 34 species and used a concatenated data set of 1403 characters (from reliable 16S, 12S and COI sequences), demonstrated that the genus Lysmata is paraphyletic, and that the monophyletic clade comprising species of Lysmata and Exhippolysmata can be divided into four well-supported subclades (Neotropical, Cleaner, Cosmopolitan, and Morphovariable).(c) 2013 The Linnean Society of London
C1 [Antonio Baeza, J.] Smithsonian Marine Stn Ft Pierce, Ft Pierce, FL 34949 USA.
[Antonio Baeza, J.] Univ Catolica Norte, Larrondo 1281, Coquimbo, Chile.
[Fuentes, M. Soledad] Algenol Biofuels, Ft Myers, FL 33928 USA.
RP Baeza, JA (reprint author), Smithsonian Marine Stn Ft Pierce, Ft Pierce, FL 34949 USA.
EM baeza.antonio@gmail.com
OI Baeza, Juan Antonio/0000-0002-2573-6773
FU STRI Marine postdoctoral Fellowship; SMSFP postdoctoral Fellowship;
National Geographic research grant
FX Many thanks to: Bill Hoffman, from the Smithsonian Marine Ecosystems
Exhibit (SMEE); Valerie Paul, Raphael Ritson-Williams, Sherry Reed, Koty
Sharp, and Julie Piraino, from the Smithsonian Marine Station at Fort
Pierce (SMSFP); Luis Ignacio Vilchis and William A. Newman, from the
Scripps Institution of Oceanography (SIO), University of California at
San Diego; Jimmy O'Donnell, from the University of California at Santa
Cruz; Juan Bolanos, Jesus Enrique Hernandez, and Regulo Lopez, from the
Universidad de Oriente (UDO), Boca del Rio, Venezuela; Adriane A. Braga,
from the Universidade Estadual Paulista (UNESP), Botucatu, Brazil;
Arthur Anker, from the University of Florida, Gainsville, FL, USA; Carla
Piantonni, from the National Museum of Natural History, Washington DC,
USA; Arcadio Castillo, from the Smithsonian Tropical Research Institute
(STRI), Panama; and Fernando Alvarez, from the Universidad Nacional
Autonoma de Mexico (UNAM), Mexico City, for their help during the
different steps of specimen collection and loan. Special thanks to Jeff
Hunt and Lee Weigt at the Laboratory of Analytical Biology, NMNH,
Washington DC for their logistical support. Thanks also to Dr J.E. Buhay
and an anonymous reviewer, whose comments improved preliminary versions
of this article. This study was partially funded by a National
Geographic research grant. J.A.B. is grateful for the support from an
STRI Marine postdoctoral Fellowship and a SMSFP postdoctoral Fellowship.
The authors have no conflict of interest regarding the information
provided in this article. This is Smithsonian Marine Station at Fort
Pierce contribution number 919.
NR 110
TC 7
Z9 7
U1 0
U2 13
PU WILEY-BLACKWELL
PI HOBOKEN
PA 111 RIVER ST, HOBOKEN 07030-5774, NJ USA
SN 0024-4082
EI 1096-3642
J9 ZOOL J LINN SOC-LOND
JI Zool. J. Linn. Soc.
PD AUG
PY 2013
VL 168
IS 4
BP 699
EP 722
DI 10.1111/zoj.12044
PG 24
WC Zoology
SC Zoology
GA 190IS
UT WOS:000322333500002
ER
PT J
AU Sues, HD
Schoch, RR
AF Sues, Hans-Dieter
Schoch, Rainer R.
TI Reassessment of cf. Halticosaurus orbitoangulatus from the Upper
Triassic (Norian) of Germany - a pseudosuchian, not a dinosaur
SO ZOOLOGICAL JOURNAL OF THE LINNEAN SOCIETY
LA English
DT Article
DE Archosauria; Baden-Wurttemberg; Loricata; Lowenstein Formation;
Paracrocodylomorpha
ID SAUROPODOMORPH DINOSAURIA; EARLY EVOLUTION; ARCHOSAURS; TAXONOMY;
SAURISCHIA
AB The holotype of cf. Halticosaurus orbitoangulatus Huene, 1932, comprises an incomplete and macerated but associated skull of an archosaurian reptile from the middle (second) Stubensandstein (middle Lowenstein Formation; Upper Triassic: Norian) of Baden-Wurttemberg, Germany. It was originally interpreted as a theropod dinosaur but more recently it has been suggested that this taxon has crocodylomorph affinities. Detailed preparation of the holotype of cf. H. orbitoangulatus has revealed much new anatomical information and permitted reassessment of its affinities. The maxilla lacks both a distinct antorbital fossa and a medial bony lamina bordering the antorbital fenestra. The lateral surface of the dentary bears a pronounced horizontal ridge. The squamosal differs from that of basal crocodylomorphs in being L-shaped rather than arcuate in dorsal view, lacking a dorsolateral overhang, and lacking an interlocking contact with the paroccipital process as, for example, in the basal crocodylomorph Saltoposuchus connectens from the same horizon and locality. Phylogenetic analysis placed cf. H. orbitoangulatus amongst loricatan pseudosuchians (but not amongst Crocodylomorpha) rather than amongst theropod dinosaurs. The holotype of cf. H. orbitoangulatus represents a previously unrecognized taxon of loricatan pseudosuchian, which is here named Apatosuchus orbitoangulatus and set apart from other known Norian-age non-crocodylomorph loricatans by its apparently much smaller size. (C) 2013 The Linnean Society of London,
C1 [Sues, Hans-Dieter] Smithsonian Inst, Natl Museum Nat Hist, Dept Paleobiol, Washington, DC 20013 USA.
[Schoch, Rainer R.] Staatliches Museum Nat Kunde Stuttgart, D-70191 Stuttgart, Germany.
RP Sues, HD (reprint author), Smithsonian Inst, Natl Museum Nat Hist, Dept Paleobiol, MRC 121,POB 37012, Washington, DC 20013 USA.
EM suesh@si.edu
FU Alexander von Humboldt Award for Excellence in Research and Teaching
FX We thank M. Kamenz for her exquisite preparation of the holotype of
Apatosuchus orbitoangulatus, which made this study possible. H.-D. S.
gratefully acknowledges receipt of an Alexander von Humboldt Award for
Excellence in Research and Teaching, which supported his work at the
Staatliches Museum fur Naturkunde Stuttgart. We thank S. L. Nesbitt and
an anonymous reviewer for helpful comments on a draft of the manuscript.
TNT is a program for phylogenetic analysis made freely available by the
Willi Hennig Society.
NR 40
TC 1
Z9 1
U1 0
U2 1
PU WILEY-BLACKWELL
PI HOBOKEN
PA 111 RIVER ST, HOBOKEN 07030-5774, NJ USA
SN 0024-4082
EI 1096-3642
J9 ZOOL J LINN SOC-LOND
JI Zool. J. Linn. Soc.
PD AUG
PY 2013
VL 168
IS 4
BP 859
EP 872
DI 10.1111/zoj.12038
PG 14
WC Zoology
SC Zoology
GA 190IS
UT WOS:000322333500005
ER
PT J
AU Kawai, K
Hailer, F
de Guia, AP
Ichikawa, H
Saitoh, T
AF Kawai, Kuniko
Hailer, Frank
Pauline de Guia, Anna
Ichikawa, Hideo
Saitoh, Takashi
TI Refugia in Glacial Ages Led to the Current Discontinuous Distribution
Patterns of the Dark Red-backed Vole Myodes rex on Hokkaido, Japan
SO ZOOLOGICAL SCIENCE
LA English
DT Article
DE Myodes rex; mitochondrial DNA control region; haplotype; distribution
pattern; refugia
ID MITOCHONDRIAL-DNA; CLETHRIONOMYS-GLAREOLUS; MAXIMUM-LIKELIHOOD;
POPULATION-GROWTH; CONTROL REGION; POLYMORPHISM; COLONIZATION;
INFERENCE; MAMMALS; ISLAND
AB The terrestrial mammalian fauna of the North Japanese island, Hokkaido, is more similar to that of Southern Siberia than to the main island of Japan, Honshu. Three species of the genus Myodes (Muridae, Rodentia) are found on Hokkaido, but not on Honshu. While Myodes rufocanus and M. rutilus are widely distributed across Hokkaido as well as the Eurasian continent, M. rex, which is endemic to Hokkaido and its adjacent islands, shows a discontinuous distribution pattern. We analyzed the phylogeographic history of M. rex using the mitochondrial DNA control region in order to interpret their discontinuous distribution pattern. Phylogenetic relationships among 54 distinct haplotypes showed that M. rex can be divided into four clades that occur on the northern, central, and southern regions of the Hokkaido mainland and on Rishiri Island, respectively. The phylogroups in the northern and central regions were largely separated in space, although several areas of sympatry were found. The phylogroup in the southern region, which was clearly separated from other phylogroups, showed markedly low genetic variability. All analyzed individuals from the population on Rishiri belonged to a separate lineage. Across a range of divergence rate estimates, we dated the basal divergence of all phylogroups to the mid to late Pleistocene, with subsequent signals of population expansion within lineages. We conclude that current phylogeographic structure in M. rex likely reflects Pleistocene survival in several separate refugia in situ. Past glacial ages have thus played an important role in shaping the current distribution patterns of mammalian species on Hokkaido.
C1 [Kawai, Kuniko; Ichikawa, Hideo; Saitoh, Takashi] Hokkaido Univ, Field Sci Ctr, Sapporo, Hokkaido 0600811, Japan.
[Kawai, Kuniko] Smithsonian Inst, Natl Museum Nat Hist, Div Mammals, Washington, DC 20013 USA.
[Hailer, Frank] Smithsonian Conservat Biol Inst, Ctr Conservat & Evolutionary Genet, Washington, DC 20008 USA.
[Hailer, Frank] Senckenberg Gesell Nat Forsch, Biodivers & Climate Res Ctr BiK F, D-60325 Frankfurt, Germany.
[Pauline de Guia, Anna] Univ Philippines Los Banos, Coll Arts & Sci, Inst Biol Sci, Anim Biol Div, Laguna 4031, Philippines.
RP Saitoh, T (reprint author), Hokkaido Univ, Field Sci Ctr, Kita 11,Nishi 10, Sapporo, Hokkaido 0600811, Japan.
EM tsaitoh@fsc.hokudai.ac.jp
RI Hailer, Frank/C-9114-2012; Saitoh, Takashi/D-6021-2012
OI Hailer, Frank/0000-0002-2340-1726; Saitoh, Takashi/0000-0003-4085-5014
FU JSPS [22370006]; Smithsonian Restricted Endowment Funds; Smithsonian
Center for Conservation and Evolutionary Genetics; "LOEWE -
Landes-Offensive zur Entwicklung Wissenschaftlich-okonomischer
Exzellenz" of Hesse's Ministry of Higher Education, Research, and the
Arts
FX We are indebted to Keisuke Nakata and the Forestry Agency of Japanese
Government for providing the material analyzed in this paper. We thank
members of Field Science Centre, Hokkaido University who helped to
collect samples in the field. We are grateful to Dr. Kristofer M. Helgen
and Dr. Koji Fujimura for valuable comments and supporting, and Dr.
Takahiro Segawa for supporting to construct haplotype trees. This work
was supported by a JSPS Grant-in-Aid for Scientific Research (22370006)
to TS. FH was supported by the Smithsonian Restricted Endowment Funds,
the Smithsonian Center for Conservation and Evolutionary Genetics, and
"LOEWE - Landes-Offensive zur Entwicklung Wissenschaftlich-okonomischer
Exzellenz" of Hesse's Ministry of Higher Education, Research, and the
Arts. Specimens collected in Niseko are deposited in Hokkaido University
Natural History Museum under the following ID number; HUNHM46316,
HUNHM48103, HUNHM48257, HUNHM48282, HUNHM 48283, HUNHM48284, HUNHM
48445, HUNHM 48446, and HUNHM 48777.
NR 46
TC 4
Z9 4
U1 0
U2 11
PU ZOOLOGICAL SOC JAPAN
PI TOKYO
PA TOSHIN-BUILDING, HONGO 2-27-2, BUNKYO-KU, TOKYO, 113-0033, JAPAN
SN 0289-0003
J9 ZOOL SCI
JI Zool. Sci.
PD AUG
PY 2013
VL 30
IS 8
BP 642
EP 650
DI 10.2108/zsj.30.642
PG 9
WC Zoology
SC Zoology
GA 190GT
UT WOS:000322328100006
PM 23915157
ER
PT J
AU Bai, XN
AF Bai, Xue-Ning
TI WIND-DRIVEN ACCRETION IN PROTOPLANETARY DISKS. II. RADIAL DEPENDENCE AND
GLOBAL PICTURE
SO ASTROPHYSICAL JOURNAL
LA English
DT Article
DE accretion, accretion disks; instabilities; magnetohydrodynamics (MHD);
methods: numerical; protoplanetary disks; turbulence
ID HUBBLE-SPACE-TELESCOPE; YOUNG STELLAR OBJECTS; T-TAURI STARS;
FORBIDDEN-LINE EMISSION; SURFACE-LAYER ACCRETION;
MAGNETOROTATIONAL-INSTABILITY; NONLINEAR EVOLUTION; AMBIPOLAR DIFFUSION;
DG-TAURI; IMAGING SPECTROGRAPH
AB Non-ideal magnetohydrodynamical effects play a crucial role in determining the mechanism and efficiency of angular momentum transport as well as the level of turbulence in protoplanetary disks (PPDs), which are the key to understanding PPD evolution and planet formation. It was shown in our previous work that at 1 AU, the magnetorotational instability (MRI) is completely suppressed when both ohmic resistivity and ambipolar diffusion (AD) are taken into account, resulting in a laminar flow with accretion driven by magnetocentrifugal wind. In this work, we study the radial dependence of the laminar wind solution using local shearing-box simulations. The scaling relation on the angular momentum transport for the laminar wind is obtained, and we find that the wind-driven accretion rate can be approximated as (M) over dot approximate to 0.91 x 10(-8)R(AU)(1.21) (B-p/10 mG)M-0.93(circle dot) yr(-1), where B-p is the strength of the large-scale poloidal magnetic field threading the disk. The result is independent of disk surface density. Four criteria are outlined for the existence of the laminar wind solution: (1) ohmic resistivity dominated the midplane region, (2) the AD-dominated disk upper layer, (3) the presence of a (not too weak) net vertical magnetic flux, and (4) sufficiently well-ionized gas beyond the disk surface. All these criteria are likely to be met in the inner region of the disk from similar to 0.3 AU to about 5-10 AU for typical PPD accretion rates. Beyond this radius, the angular momentum transport is likely to proceed due to a combination of the MRI and disk wind, and eventually completely dominated by the MRI (in the presence of strong AD) in the outer disk. Our simulation results provide key ingredients for a new paradigm on the accretion processes in PPDs.
C1 Harvard Smithsonian Ctr Astrophys, Inst Theory & Computat, Cambridge, MA 02138 USA.
RP Bai, XN (reprint author), Harvard Smithsonian Ctr Astrophys, Inst Theory & Computat, 60 Garden St,MS-51, Cambridge, MA 02138 USA.
EM xbai@cfa.harvard.edu
FU NASA through Space Telescope Science Institute [HST-HF-51301.01]; NASA
[NAS5-26555]
FX I thank the referee for useful comments and suggestions that improve the
clarity of this paper. This work is supported by program number
HST-HF-51301.01-A provided by NASA through a Hubble Fellowship grant
from the Space Telescope Science Institute awarded to X.N.B., which is
operated by the Association of Universities for Research in Astronomy,
Incorporated, under NASA contract NAS5-26555.
NR 70
TC 36
Z9 37
U1 0
U2 4
PU IOP PUBLISHING LTD
PI BRISTOL
PA TEMPLE CIRCUS, TEMPLE WAY, BRISTOL BS1 6BE, ENGLAND
SN 0004-637X
J9 ASTROPHYS J
JI Astrophys. J.
PD AUG 1
PY 2013
VL 772
IS 2
AR 96
DI 10.1088/0004-637X/772/2/96
PG 15
WC Astronomy & Astrophysics
SC Astronomy & Astrophysics
GA 186EL
UT WOS:000322024700018
ER
PT J
AU Barnard, R
Garcia, M
Murray, SS
AF Barnard, R.
Garcia, M.
Murray, S. S.
TI THE SECOND ULTRALUMINOUS X-RAY SOURCE TRANSIENT IN M31: CHANDRA, HUBBLE
SPACE TELESCOPE, AND XMM OBSERVATIONS, AND EVIDENCE FOR AN EXTENDED
CORONA
SO ASTROPHYSICAL JOURNAL
LA English
DT Article
DE black hole physics; X-rays: binaries; X-rays: general
ID BLACK-HOLE; LIGHT CURVES; BINARIES; ACCRETION; GALAXIES; STARS;
COMPTONIZATION
AB XMMU J004243.6+412519 is a transient X-ray source in M31, first discovered 2012 January 15. Different approaches to fitting the brightest follow-up observation gave luminosities 1.3-2.5 x 10(39) erg s(-1), making it the second ultraluminous X-ray source (ULX) in M31, with a probable black hole accretor. These different models represent different scenarios for the corona: optically thick and compact, or optically thin and extended. We obtained Chandra ACIS and Hubble Space Telescope Advanced Camera for Surveys observations of this object as part of our transient monitoring program, and also observed it serendipitously in a 120 ks XMM-Newton observation. We identify an optical counterpart at J2000 position 00:42:43.70 +41:25:18.54; its F435W (similar to B band) magnitude was 25.97 +/- 0.03 in the 2012 March 7 observation, and >28.4 at the 4 sigma level during the 2012 September 7 observation, indicating a low-mass donor. We created two alternative light curves, using the different corona scenarios, finding linear decay for the compact corona and exponential decay for the extended corona; linear decay implies a disk that is >5 mag brighter than we observed. We therefore favor the extended corona scenario, but caution that there is no statistical preference for this model in the X-ray spectra alone. Using two empirical relations between the X-ray to optical ratio and the orbital period, we estimate a period of similar to 9-30 hr; this period is consistent with that of the first ULX in M31 (18(-6)(+5) hr).
C1 [Barnard, R.; Garcia, M.; Murray, S. S.] Harvard Smithsonian Ctr Astrophys, Cambridge, MA 02138 USA.
[Murray, S. S.] Johns Hopkins Univ, Baltimore, MD USA.
RP Barnard, R (reprint author), Harvard Smithsonian Ctr Astrophys, 60 Garden St, Cambridge, MA 02138 USA.
FU ESA member states; US (NASA); Chandra grants [GO2-13106X, GO1-12109X];
HST [GO-11833, GO-12014]; NASA [NAS8-03060]
FX We thank the anonymous referee for his/her thoughtful comments that
substantially improved this paper. We thank Z. Li for merging the
Chandra data. This research has made use of data obtained from the
Chandra data archive, and software provided by the Chandra X-Ray Center
(CXC). We also include analysis of data from XMM-Newton, an ESA science
mission with instruments and contributions directly funded by ESA member
states and the US (NASA). R. B. is funded by Chandra grants GO2-13106X
and GO1-12109X, along with HST grants GO-11833 and GO-12014. M. R. G.
and S. S. M are partially supported by NASA contract NAS8-03060.
NR 34
TC 7
Z9 7
U1 0
U2 4
PU IOP PUBLISHING LTD
PI BRISTOL
PA TEMPLE CIRCUS, TEMPLE WAY, BRISTOL BS1 6BE, ENGLAND
SN 0004-637X
J9 ASTROPHYS J
JI Astrophys. J.
PD AUG 1
PY 2013
VL 772
IS 2
AR 126
DI 10.1088/0004-637X/772/2/126
PG 8
WC Astronomy & Astrophysics
SC Astronomy & Astrophysics
GA 186EL
UT WOS:000322024700048
ER
PT J
AU Bogdan, A
Forman, WR
Kraft, RP
Jones, C
AF Bogdan, Akos
Forman, William R.
Kraft, Ralph P.
Jones, Christine
TI DETECTION OF A LUMINOUS HOT X-RAY CORONA AROUND THE MASSIVE SPIRAL
GALAXY NGC 266
SO ASTROPHYSICAL JOURNAL
LA English
DT Article
DE galaxies: individual (NGC 266); galaxies: ISM; galaxies: spiral; X-rays:
galaxies; X-rays: general; X-rays: ISM
ID DISK GALAXIES; GASEOUS HALO; EMISSION; SIMULATIONS; GAS
AB The presence of luminous hot X-ray coronae in the dark matter halos of massive spiral galaxies is a basic prediction of galaxy formation models. However, observational evidence for such coronae is very scarce, with the first few examples having only been detected recently. In this paper, we study the large-scale diffuse X-ray emission associated with the massive spiral galaxy NGC 266. Using ROSAT and Chandra X-ray observations we argue that the diffuse emission extends at least similar to 70 kpc, whereas the bulk of the stellar light is confined to within similar to 25 kpc. Based on X-ray hardness ratios, we find that most of the diffuse emission is released at energies less than or similar to 1.2 keV, which indicates that this emission originates from hot X-ray gas. Adopting a realistic gas temperature and metallicity, we derive that in the (0.05-0.15)r(200) region (where r(200) is the virial radius) the bolometric X-ray luminosity of the hot gas is (4.3 +/- 0.8) x 10(40) erg s(-1) and the gas mass is (9.1 +/- 0.9) x 10(9) M-circle dot. These values are comparable to those observed for the two other well-studied X-ray coronae in spiral galaxies, suggesting that the physical properties of such coronae are similar. This detection offers an excellent opportunity for comparison of observations with detailed galaxy formation simulations.
C1 [Bogdan, Akos; Forman, William R.; Kraft, Ralph P.; Jones, Christine] Smithsonian Astrophys Observ, Cambridge, MA 02138 USA.
RP Bogdan, A (reprint author), Smithsonian Astrophys Observ, 60 Garden St, Cambridge, MA 02138 USA.
EM abogdan@cfa.harvard.edu
OI Forman, William/0000-0002-9478-1682
FU NASA; NSF; NASA [PF1-120081, NAS8-03060]; CXC; Smithsonian Institution
FX We thank the anonymous referee for helpful comments. A.B. thanks Alexey
Vikhlinin for helpful discussions about the ROSAT PSF. This research has
made use of Chandra data provided by the CXC. This publication makes use
of data products from the 2MASS, which is a joint project of the
University of Massachusetts and the Infrared Processing and Analysis
Center/California Institute of Technology, funded by NASA and NSF. The
authors acknowledge the usage of the HyperLeda database. A.B.
acknowledges support provided by NASA through Einstein Postdoctoral
Fellowship grant number PF1-120081 awarded by the CXC, which is operated
by the Smithsonian Astrophysical Observatory for NASA under contract
NAS8-03060. W.F. and C.J. acknowledge support from the Smithsonian
Institution.
NR 25
TC 20
Z9 20
U1 0
U2 2
PU IOP PUBLISHING LTD
PI BRISTOL
PA TEMPLE CIRCUS, TEMPLE WAY, BRISTOL BS1 6BE, ENGLAND
SN 0004-637X
J9 ASTROPHYS J
JI Astrophys. J.
PD AUG 1
PY 2013
VL 772
IS 2
AR 98
DI 10.1088/0004-637X/772/2/98
PG 5
WC Astronomy & Astrophysics
SC Astronomy & Astrophysics
GA 186EL
UT WOS:000322024700020
ER
PT J
AU Bogdan, A
Forman, WR
Vogelsberger, M
Bourdin, H
Sijacki, D
Mazzotta, P
Kraft, RP
Jones, C
Gilfanov, M
Churazov, E
David, LP
AF Bogdan, Akos
Forman, William R.
Vogelsberger, Mark
Bourdin, Herve
Sijacki, Debora
Mazzotta, Pasquale
Kraft, Ralph P.
Jones, Christine
Gilfanov, Marat
Churazov, Eugene
David, Laurence P.
TI HOT X-RAY CORONAE AROUND MASSIVE SPIRAL GALAXIES: A UNIQUE PROBE OF
STRUCTURE FORMATION MODELS
SO ASTROPHYSICAL JOURNAL
LA English
DT Article
DE galaxies: individual (NGC 1961, NGC 6753); galaxies: ISM; galaxies:
spiral; X-rays: galaxies; X-rays: general; X-rays: ISM
ID MOVING-MESH COSMOLOGY; SMOOTHED PARTICLE HYDRODYNAMICS; GALACTIC NUCLEUS
FEEDBACK; XMM-NEWTON; STAR-FORMATION; ELLIPTIC GALAXY; DISK GALAXIES;
STELLAR MASS; INTERGALACTIC MEDIUM; CHANDRA OBSERVATION
AB Luminous X-ray gas coronae in the dark matter halos of massive spiral galaxies are a fundamental prediction of structure formation models, yet only a few such coronae have been detected so far. In this paper, we study the hot X-ray coronae beyond the optical disks of two "normal" massive spirals, NGC 1961 and NGC 6753. Based on XMM-Newton X-ray observations, hot gaseous emission is detected to similar to 60 kpc-well beyond their optical radii. The hot gas has a best-fit temperature of kT similar to 0.6 keV and an abundance of similar to 0.1 Solar, and exhibits a fairly uniform distribution, suggesting that the quasi-static gas resides in hydrostatic equilibrium in the potential well of the galaxies. The bolometric luminosity of the gas in the (0.05-0.15)r(200) region (r(200) is the virial radius) is similar to 6 x 10(40) erg s(-1) for both galaxies. The baryon mass fractions of NGC 1961 and NGC 6753 are f(b,NGC 1961) similar to 0.11 and f(b,NGC 6753) similar to 0.09, which values fall short of the cosmic baryon fraction. The hot coronae around NGC 1961 and NGC 6753 offer an excellent basis to probe structure formation simulations. To this end, the observations are confronted with the moving mesh code arepo and the smoothed particle hydrodynamics code gadget. Although neither model gives a perfect description, the observed luminosities, gas masses, and abundances favor the arepo code. Moreover, the shape and the normalization of the observed density profiles are better reproduced by arepo within similar to 0.5r(200). However, neither model incorporates efficient feedback from supermassive black holes or supernovae, which could alter the simulated properties of the X-ray coronae. With the further advance of numerical models, the present observations will be essential in constraining the feedback effects in structure formation simulations.
C1 [Bogdan, Akos; Forman, William R.; Vogelsberger, Mark; Sijacki, Debora; Mazzotta, Pasquale; Kraft, Ralph P.; Jones, Christine; David, Laurence P.] Harvard Smithsonian Ctr Astrophys, Cambridge, MA 02138 USA.
[Bourdin, Herve; Mazzotta, Pasquale] Univ Roma Tor Vergata, Dipartimento Fis, I-00133 Rome, Italy.
[Gilfanov, Marat; Churazov, Eugene] Max Planck Inst Astrophys, D-85748 Garching, Germany.
RP Bogdan, A (reprint author), Harvard Smithsonian Ctr Astrophys, 60 Garden St, Cambridge, MA 02138 USA.
EM abogdan@cfa.harvard.edu
RI Churazov, Eugene/A-7783-2013; Mazzotta, Pasquale/B-1225-2016;
OI Mazzotta, Pasquale/0000-0002-5411-1748; Forman,
William/0000-0002-9478-1682
FU National Aeronautics and Space Administration; National Science
Foundation; NASA [PF1-120081, NAS8-03060]; Chandra X-ray Center;
Smithsonian Institution; ESA Member States; NASA
FX We thank the anonymous referee for useful comments. We thank Alexey
Vikhlinin for helpful discussions about SMART-X, Volker Springel for
careful reading, and Rob Crain for critical comments. This work uses
observations obtained with XMM-Newton, an ESA science mission with
instruments and contributions directly funded by ESA Member States and
NASA. This publication makes use of data products from the Two Micron
All Sky Survey, which is a joint project of the University of
Massachusetts and the Infrared Processing and Analysis Center/California
Institute of Technology, funded by the National Aeronautics and Space
Administration and the National Science Foundation. In this work the
NASA/IPAC Extragalactic Database (NED) have been used. The authors
acknowledge use of the HyperLeda database (http://leda.univ-lyon1.fr).
A.B. acknowledges support provided by NASA through Einstein Postdoctoral
Fellowship grant No. PF1-120081 awarded by the Chandra X-ray Center,
which is operated by the Smithsonian Astrophysical Observatory for NASA
under contract NAS8-03060. W.F. and C.J. acknowledge support from the
Smithsonian Institution.
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PA TEMPLE CIRCUS, TEMPLE WAY, BRISTOL BS1 6BE, ENGLAND
SN 0004-637X
J9 ASTROPHYS J
JI Astrophys. J.
PD AUG 1
PY 2013
VL 772
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AR 97
DI 10.1088/0004-637X/772/2/97
PG 18
WC Astronomy & Astrophysics
SC Astronomy & Astrophysics
GA 186EL
UT WOS:000322024700019
ER
PT J
AU Brescia, M
Cavuoti, S
D'Abrusco, R
Longo, G
Mercurio, A
AF Brescia, M.
Cavuoti, S.
D'Abrusco, R.
Longo, G.
Mercurio, A.
TI PHOTOMETRIC REDSHIFTS FOR QUASARS IN MULTI-BAND SURVEYS
SO ASTROPHYSICAL JOURNAL
LA English
DT Article
DE catalogs; galaxies: distances and redshifts; methods: data analysis;
quasars: general; surveys
ID DIGITAL-SKY-SURVEY; 7TH DATA RELEASE; FUNCTION MINIMIZATION; CONJUGATE
GRADIENTS; GALAXIES; SDSS; EVOLUTION; SELECTION; EXPLORER; MISSION
AB The Multi Layer Perceptron with Quasi Newton Algorithm (MLPQNA) is a machine learning method that can be used to cope with regression and classification problems on complex and massive data sets. In this paper, we give a formal description of the method and present the results of its application to the evaluation of photometric redshifts for quasars. The data set used for the experiment was obtained by merging four different surveys (Sloan Digital Sky Survey, GALEX, UKIDSS, and WISE), thus covering a wide range of wavelengths from the UV to the mid-infrared. The method is able (1) to achieve a very high accuracy, (2) to drastically reduce the number of outliers and catastrophic objects, and (3) to discriminate among parameters (or features) on the basis of their significance, so that the number of features used for training and analysis can be optimized in order to reduce both the computational demands and the effects of degeneracy. The best experiment, which makes use of a selected combination of parameters drawn from the four surveys, leads, in terms of Delta z(norm) (i.e., (z(spec) - z(phot))/(1 + z(spec))), to an average of Delta z(norm) = 0.004, a standard deviation of sigma = 0.069, and a median absolute deviation, MAD = 0.02, over the whole redshift range (i.e., z(spec) <= 3.6), defined by the four-survey cross-matched spectroscopic sample. The fraction of catastrophic outliers, i.e., of objects with photo-z deviating more than 2 sigma from the spectroscopic value, is <3%, leading to sigma = 0.035 after their removal, over the same redshift range. The method is made available to the community through the DAMEWARE Web application.
C1 [Brescia, M.; Mercurio, A.] INAF Astron Observ Capodimonte, I-80131 Naples, Italy.
[Brescia, M.; Cavuoti, S.; Longo, G.] Univ Naples Federico II, Dept Phys, I-80126 Naples, Italy.
[D'Abrusco, R.] Harvard Smithsonian Ctr Astrophys, Cambridge, MA 02138 USA.
RP Brescia, M (reprint author), INAF Astron Observ Capodimonte, Via Moiariello 16, I-80131 Naples, Italy.
EM brescia@oacn.inaf.it
RI D'Abrusco, Raffaele/L-2767-2016; Cavuoti, Stefano/B-4650-2017;
OI D'Abrusco, Raffaele/0000-0003-3073-0605; Cavuoti,
Stefano/0000-0002-3787-4196; Brescia, Massimo/0000-0001-9506-5680
FU Project F.A.R.O.; PRIN-INAF; US Virtual Astronomical Observatory;
National Science Foundation; National Aeronautics and Space
Administration; PRIN-MIUR
FX The authors thank the anonymous referee for comments and suggestions
that helped to improve the paper, and the whole DAMEWARE
team6 for many useful discussions. The authors also thank the
financial support of Project F.A.R.O., third call by the University
Federico II of Naples, and of the PRIN-MIUR 2011 for Euclid Mission. G.
L. thanks Professor G. S. Djorgovski and the whole Department of
Astronomy at the California Institute of Technology in Pasadena for
their hospitality. A. M. and M. B. acknowledge the financial support of
PRIN-INAF 2010, Architecture and Tomography of Galaxy Clusters. R. D'A.
acknowledges the financial support of the US Virtual Astronomical
Observatory, which is sponsored by the National Science Foundation and
the National Aeronautics and Space Administration.
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PA TEMPLE CIRCUS, TEMPLE WAY, BRISTOL BS1 6BE, ENGLAND
SN 0004-637X
EI 1538-4357
J9 ASTROPHYS J
JI Astrophys. J.
PD AUG 1
PY 2013
VL 772
IS 2
AR 140
DI 10.1088/0004-637X/772/2/140
PG 12
WC Astronomy & Astrophysics
SC Astronomy & Astrophysics
GA 186EL
UT WOS:000322024700062
ER
PT J
AU Clarke, TE
Randall, SW
Sarazin, CL
Blanton, EL
Giacintucci, S
AF Clarke, T. E.
Randall, S. W.
Sarazin, C. L.
Blanton, E. L.
Giacintucci, S.
TI CHANDRA VIEW OF THE ULTRA-STEEP SPECTRUM RADIO SOURCE IN A2443: MERGER
SHOCK-INDUCED COMPRESSION OF FOSSIL RADIO PLASMA?
SO ASTROPHYSICAL JOURNAL
LA English
DT Article
DE galaxies: clusters: general; galaxies: clusters: individual (A2443);
radio continuum: galaxies; X-rays: galaxies: clusters
ID GALAXY CLUSTER; X-RAY; COLD FRONTS; BOW SHOCK; RELICS; CORES; WAVES;
REDSHIFTS; EMISSION; CATALOG
AB We present a new Chandra X-ray observation of the intracluster medium in the galaxy cluster A2443, hosting an ultra-steep spectrum radio source. The data reveal that the intracluster medium is highly disturbed. The thermal gas in the core is elongated along a northwest to southeast axis and there is a cool tail to the north. We also detect two X-ray surface brightness edges near the cluster core. The edges appear to be consistent with an inner cold front to the northeast of the core and an outer shock front to the southeast of the core. The southeastern edge is coincident with the location of the radio relic as expected for shock (re) acceleration or adiabatic compression of fossil relativistic electrons.
C1 [Clarke, T. E.] USN, Res Lab, Washington, DC 20375 USA.
[Randall, S. W.] Harvard Smithsonian Ctr Astrophys, Cambridge, MA 02138 USA.
[Sarazin, C. L.] Univ Virginia, Dept Astron, Charlottesville, VA 22904 USA.
[Blanton, E. L.] Boston Univ, Dept Astron, Boston, MA 02215 USA.
[Blanton, E. L.] Boston Univ, Inst Astrophys Res, Boston, MA 02215 USA.
[Giacintucci, S.] Univ Maryland, Dept Astron, College Pk, MD 20742 USA.
[Giacintucci, S.] Univ Maryland, Joint Space Sci Inst, College Pk, MD 20742 USA.
RP Clarke, TE (reprint author), USN, Res Lab, Code 7213, Washington, DC 20375 USA.
EM tracy.clarke.ca@nrl.navy.mil
RI Blanton, Elizabeth/H-4501-2014;
OI Randall, Scott/0000-0002-3984-4337
FU National Aeronautics and Space Administration, through Chandra Award
Number [GO1-12007Z]; 6.1 Base funding; Chandra X-ray Center through NASA
contract [NAS8-03060]; Smithsonian Institution; NASA Chandra Grants
[GO9-0135X, GO9-0148X, GO1-12169X]; NASA ADAP grant [NNX11AD15G]; NASA
through the Astrophysics Data Analysis Program [NNX10AC98G]; NASA award
RSA [1440385]; NASA through Einstein Postdoctoral Fellowship
[PF0-110071]; Chandra X-ray Center; Alfred P. Sloan Foundation; National
Science Foundation; U.S. Department of Energy Office of Science
FX T. E. C. was supported in part for this work by the National Aeronautics
and Space Administration, through Chandra Award Number GO1-12007Z. Basic
research in radio astronomy at the Naval Research Laboratory is
supported by 6.1 Base funding. S. R. is supported by the Chandra X-ray
Center through NASA contract NAS8-03060 and the Smithsonian Institution.
C. L. S. was supported in part by NASA Chandra Grants GO9-0135X,
GO9-0148X, and GO1-12169X, and NASA ADAP grant NNX11AD15G. E. L. B. was
partially supported by NASA through the Astrophysics Data Analysis
Program, grant number NNX10AC98G, and through NASA award RSA No. 1440385
issued by JPL/Caltech. S. G. acknowledges the support of NASA through
Einstein Postdoctoral Fellowship PF0-110071 awarded by the Chandra X-ray
Center. The National Radio Astronomy Observatory is a facility of the
National Science Foundation operated under cooperative agreement by
Associated Universities, Inc. This research has made use of the
NASA/IPAC Extragalactic Database (NED) which is operated by the Jet
Propulsion Laboratory, California Institute of Technology, under
contract with the National Aeronautics and Space Administration.;
Funding for SDSS-III has been provided by the Alfred P. Sloan
Foundation, the Participating Institutions, the National Science
Foundation, and the U.S. Department of Energy Office of Science. The
SDSS-III Web site is http://www.sdss3.org/.
NR 58
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PI BRISTOL
PA TEMPLE CIRCUS, TEMPLE WAY, BRISTOL BS1 6BE, ENGLAND
SN 0004-637X
J9 ASTROPHYS J
JI Astrophys. J.
PD AUG 1
PY 2013
VL 772
IS 2
AR 84
DI 10.1088/0004-637X/772/2/84
PG 12
WC Astronomy & Astrophysics
SC Astronomy & Astrophysics
GA 186EL
UT WOS:000322024700006
ER
PT J
AU Cranmer, SR
Wilner, DJ
MacGregor, MA
AF Cranmer, Steven R.
Wilner, David J.
MacGregor, Meredith A.
TI CONSTRAINING A MODEL OF TURBULENT CORONAL HEATING FOR AU MICROSCOPII
WITH X-RAY, RADIO, AND MILLIMETER OBSERVATIONS
SO ASTROPHYSICAL JOURNAL
LA English
DT Article
DE radio continuum: stars; stars: coronae; stars: individual (AU
Microscopii); submillimeter: stars; turbulence; X-rays: stars
ID T TAURI STARS; MAIN-SEQUENCE STARS; LOW-MASS STARS; M-DWARFS; DEBRIS
DISK; TRANSITION REGION; MAGNETIC CARPET; DUST DYNAMICS; BRIGHT POINTS;
SOLAR CORONA
AB Many low-mass pre-main-sequence stars exhibit strong magnetic activity and coronal X-ray emission. Even after the primordial accretion disk has been cleared out, the star's high-energy radiation continues to affect the formation and evolution of dust, planetesimals, and large planets. Young stars with debris disks are thus ideal environments for studying the earliest stages of non-accretion-driven coronae. In this paper we simulate the corona of AU Mic, a nearby active M dwarf with an edge-on debris disk. We apply a self-consistent model of coronal loop heating that was derived from numerical simulations of solar field-line tangling and magnetohydrodynamic turbulence. We also synthesize the modeled star's X-ray luminosity and thermal radio/millimeter continuum emission. A realistic set of parameter choices for AU Mic produces simulated observations that agree with all existing measurements and upper limits. This coronal model thus represents an alternative explanation for a recently discovered ALMA central emission peak that was suggested to be the result of an inner "asteroid belt" within 3 AU of the star. However, it is also possible that the central 1.3 mm peak is caused by a combination of active coronal emission and a bright inner source of dusty debris. Additional observations of this source's spatial extent and spectral energy distribution at millimeter and radio wavelengths will better constrain the relative contributions of the proposed mechanisms.
C1 [Cranmer, Steven R.; Wilner, David J.; MacGregor, Meredith A.] Harvard Smithsonian Ctr Astrophys, Cambridge, MA 02138 USA.
RP Cranmer, SR (reprint author), Harvard Smithsonian Ctr Astrophys, 60 Garden St, Cambridge, MA 02138 USA.
OI MacGregor, Meredith/0000-0001-7891-8143
NR 72
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U1 0
U2 3
PU IOP PUBLISHING LTD
PI BRISTOL
PA TEMPLE CIRCUS, TEMPLE WAY, BRISTOL BS1 6BE, ENGLAND
SN 0004-637X
EI 1538-4357
J9 ASTROPHYS J
JI Astrophys. J.
PD AUG 1
PY 2013
VL 772
IS 2
AR 149
DI 10.1088/0004-637X/772/2/149
PG 9
WC Astronomy & Astrophysics
SC Astronomy & Astrophysics
GA 186EL
UT WOS:000322024700071
ER
PT J
AU Ivison, RJ
Swinbank, AM
Smail, I
Harris, AI
Bussmann, RS
Cooray, A
Cox, P
Fu, H
Kovacs, A
Krips, M
Narayanan, D
Negrello, M
Neri, R
Penarrubia, J
Richard, J
Riechers, DA
Rowlands, K
Staguhn, JG
Targett, TA
Amber, S
Baker, AJ
Bourne, N
Bertoldi, F
Bremer, M
Calanog, JA
Clements, DL
Dannerbauer, H
Dariush, A
De Zotti, G
Dunne, L
Eales, SA
Farrah, D
Fleuren, S
Franceschini, A
Geach, JE
George, RD
Helly, JC
Hopwood, R
Ibar, E
Jarvis, MJ
Kneib, JP
Maddox, S
Omont, A
Scott, D
Serjeant, S
Smith, MWL
Thompson, MA
Valiante, E
Valtchanov, I
Vieira, J
van der Werf, P
AF Ivison, R. J.
Swinbank, A. M.
Smail, Ian
Harris, A. I.
Bussmann, R. S.
Cooray, A.
Cox, P.
Fu, H.
Kovacs, A.
Krips, M.
Narayanan, D.
Negrello, M.
Neri, R.
Penarrubia, J.
Richard, J.
Riechers, D. A.
Rowlands, K.
Staguhn, J. G.
Targett, T. A.
Amber, S.
Baker, A. J.
Bourne, N.
Bertoldi, F.
Bremer, M.
Calanog, J. A.
Clements, D. L.
Dannerbauer, H.
Dariush, A.
De Zotti, G.
Dunne, L.
Eales, S. A.
Farrah, D.
Fleuren, S.
Franceschini, A.
Geach, J. E.
George, R. D.
Helly, J. C.
Hopwood, R.
Ibar, E.
Jarvis, M. J.
Kneib, J. -P.
Maddox, S.
Omont, A.
Scott, D.
Serjeant, S.
Smith, M. W. L.
Thompson, M. A.
Valiante, E.
Valtchanov, I.
Vieira, J.
van der Werf, P.
TI HERSCHEL-ATLAS: A BINARY HyLIRG PINPOINTING A CLUSTER OF STARBURSTING
PROTOELLIPTICALS
SO ASTROPHYSICAL JOURNAL
LA English
DT Article
DE galaxies: high-redshift; galaxies: starburst; infrared: galaxies; radio
continuum: galaxies; radio lines: galaxies; submillimeter: galaxies
ID STAR-FORMATION RATES; ULTRALUMINOUS INFRARED GALAXIES; LUMINOUS
SUBMILLIMETER GALAXIES; SCIENCE DEMONSTRATION PHASE;
SPITZER-SPACE-TELESCOPE; ACTIVE GALACTIC NUCLEI; GREEN BANK TELESCOPE;
HIGH-REDSHIFT; MOLECULAR GAS; MASS FUNCTION
AB Panchromatic observations of the best candidate hyperluminous infrared galaxies from the widest Herschel extragalactic imaging survey have led to the discovery of at least four intrinsically luminous z = 2.41 galaxies across an approximate to 100 kpc region-a cluster of starbursting protoellipticals. Via subarcsecond interferometric imaging we have measured accurate gas and star formation surface densities. The two brightest galaxies span similar to 3 kpc FWHM in submillimeter/radio continuum and CO J = 4-3, and double that in CO J = 1-0. The broad CO line is due partly to the multitude of constituent galaxies and partly to large rotational velocities in two counter-rotating gas disks-a scenario predicted to lead to the most intense starbursts, which will therefore come in pairs. The disks have M-dyn of several x 10(11) M-circle dot, and gas fractions of similar to 40%. Velocity dispersions are modest so the disks are unstable, potentially on scales commensurate with their radii: these galaxies are undergoing extreme bursts of star formation, not confined to their nuclei, at close to the Eddington limit. Their specific star formation rates place them greater than or similar to 5x above the main sequence, which supposedly comprises large gas disks like these. Their high star formation efficiencies are difficult to reconcile with a simple volumetric star formation law. N-body and dark matter simulations suggest that this system is the progenitor of a B(inary)-type approximate to 10(14.6)-M-circle dot cluster.
C1 [Ivison, R. J.; Ibar, E.] Royal Observ, Sci & Technol Facil Council, UK Astron Technol Ctr, Edinburgh EH9 3HJ, Midlothian, Scotland.
[Ivison, R. J.; Penarrubia, J.; Targett, T. A.; George, R. D.] Univ Edinburgh, Inst Astron, Royal Observ, Edinburgh EH9 3HJ, Midlothian, Scotland.
[Swinbank, A. M.; Smail, Ian; Helly, J. C.] Univ Durham, Inst Computat Cosmol, Durham DH1 3LE, England.
[Harris, A. I.] Univ Maryland, Dept Astron, College Pk, MD 20742 USA.
[Bussmann, R. S.] Harvard Smithsonian Ctr Astrophys, Cambridge, MA 02138 USA.
[Cooray, A.; Fu, H.; Calanog, J. A.] Univ Calif Irvine, Dept Phys & Astron, Irvine, CA 92697 USA.
[Cox, P.; Krips, M.; Neri, R.] Inst Radio Astron Millimetr, F-38406 St Martin Dheres, France.
[Kovacs, A.] Univ Minnesota, Dept Astron, Minneapolis, MN 55414 USA.
[Narayanan, D.] Univ Arizona, Steward Observ, Tucson, AZ 85721 USA.
[Negrello, M.; De Zotti, G.] Osserv Astron Padova, INAF, I-35122 Padua, Italy.
[Richard, J.] Univ Lyon 1, Ctr Rech Astrophys Lyon, F-69561 St Genis Laval, France.
[Riechers, D. A.] Cornell Univ, Dept Astron, Ithaca, NY 14853 USA.
[Rowlands, K.; Bourne, N.] Univ Nottingham, Sch Phys & Astron, Nottingham NG7 2RD, England.
[Staguhn, J. G.] Johns Hopkins Univ, Henry A Rowland Dept Phys & Astron, Baltimore, MD 21218 USA.
[Amber, S.; Hopwood, R.; Serjeant, S.] Open Univ, Dept Phys Sci, Milton Keynes MK7 6AA, Bucks, England.
[Baker, A. J.] Rutgers State Univ, Dept Phys & Astron, Piscataway, NJ 08854 USA.
[Bertoldi, F.] Univ Bonn, Argelander Inst Astron, D-53121 Bonn, Germany.
[Bremer, M.] Univ Bristol, HH Wills Phys Lab, Bristol BS8 1TL, Avon, England.
[Clements, D. L.; Hopwood, R.] Univ London Imperial Coll Sci Technol & Med, Dept Phys, London SW7 2AZ, England.
[Dannerbauer, H.] Univ Vienna, Inst Astrophys, A-1180 Vienna, Austria.
[Dariush, A.] Univ Cambridge, Inst Astron, Cambridge CB3 0HA, England.
[De Zotti, G.] SISSA, I-34136 Trieste, Italy.
[Dunne, L.; Maddox, S.] Univ Canterbury, Dept Phys & Astron, Christchurch 1, New Zealand.
[Eales, S. A.; Smith, M. W. L.; Valiante, E.] Cardiff Univ, Sch Phys & Astron, Cardiff CF24 3AA, S Glam, Wales.
[Farrah, D.] Virginia Polytech Inst & State Univ, Dept Phys, Blacksburg, VA 24061 USA.
[Fleuren, S.] Queen Mary Univ London, Sch Phys & Astron, London E1 4NS, England.
[Franceschini, A.] Univ Padua, Dept Astron, I-35122 Padua, Italy.
[Geach, J. E.; Thompson, M. A.] Univ Hertfordshire, Ctr Astrophys Res, Hatfield AL10 9AB, Herts, England.
[Ibar, E.] Catholic Univ Chile, Dept Astron & Astrofis, Casilla 306 22, Santiago, Chile.
[Jarvis, M. J.] Univ Oxford, Dept Phys, Oxford OX1 3RH, England.
[Jarvis, M. J.] Univ Western Cape, Dept Phys, ZA-7535 Bellville, South Africa.
[Kneib, J. -P.] Observ Geneva, EPFL SB IPEP LASTRO, CH-1290 Sauverny, Switzerland.
[Omont, A.] Univ Paris 06, UPMC, F-75014 Paris, France.
[Omont, A.] CNRS, UMR7095, F-75014 Paris, France.
[Scott, D.] Univ British Columbia, Dept Phys & Astron, Vancouver, BC V6T 1Z1, Canada.
[Valtchanov, I.] Herschel Sci Ctr, European Space Astron Ctr, ESA, E-28691 Villanueva De La Canada, Spain.
[Vieira, J.] CALTECH, Pasadena, CA 91125 USA.
[van der Werf, P.] Leiden Univ, Leiden Observ, NL-2300 RA Leiden, Netherlands.
RP Ivison, RJ (reprint author), Royal Observ, Sci & Technol Facil Council, UK Astron Technol Ctr, Blackford Hill, Edinburgh EH9 3HJ, Midlothian, Scotland.
RI Smail, Ian/M-5161-2013; Kneib, Jean-Paul/A-7919-2015; Kovacs,
Attila/C-1171-2010; Ivison, R./G-4450-2011;
OI Maddox, Stephen/0000-0001-5549-195X; Smail, Ian/0000-0003-3037-257X;
Kneib, Jean-Paul/0000-0002-4616-4989; Kovacs,
Attila/0000-0001-8991-9088; Ivison, R./0000-0001-5118-1313; De Zotti,
Gianfranco/0000-0003-2868-2595; Scott, Douglas/0000-0002-6878-9840
FU European Research Council (ERC); NASA through JPL; STFC; ERC; ASI/INAF
[I/072/09/0]
FX R.J.I. acknowledges support from the European Research Council (ERC) in
the form of Advanced Grant, COSMICISM. The Herschel-ATLAS is a project
with Herschel, which is an ESA Space Observatory with science
instruments provided by European-led Principal Investigator consortia
and with important participation from NASA. The H-ATLAS Web site is
www.h-atlas.org. US participants in H-ATLAS acknowledge support from
NASA through a contract from JPL. I. R. S. acknowledges support from
STFC and ERC. M.N. and G.dZ. acknowledge financial support from ASI/INAF
Agreement I/072/09/0.
NR 106
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PU IOP PUBLISHING LTD
PI BRISTOL
PA TEMPLE CIRCUS, TEMPLE WAY, BRISTOL BS1 6BE, ENGLAND
SN 0004-637X
J9 ASTROPHYS J
JI Astrophys. J.
PD AUG 1
PY 2013
VL 772
IS 2
AR 137
DI 10.1088/0004-637X/772/2/137
PG 15
WC Astronomy & Astrophysics
SC Astronomy & Astrophysics
GA 186EL
UT WOS:000322024700059
ER
PT J
AU Korzennik, SG
Rabello-Soares, MC
Schou, J
Larson, TP
AF Korzennik, S. G.
Rabello-Soares, M. C.
Schou, J.
Larson, T. P.
TI ACCURATE CHARACTERIZATION OF HIGH-DEGREE MODES USING MDI OBSERVATIONS
SO ASTROPHYSICAL JOURNAL
LA English
DT Article
DE Sun: activity; Sun: helioseismology; Sun: oscillations
ID MICHELSON DOPPLER IMAGER; HIGH-DEGREE FREQUENCIES; SOLAR-CYCLE;
DIFFERENTIAL ROTATION; SPLITTINGS; EIGENFUNCTIONS; INTERMEDIATE;
SPECTRUM; SURFACE
AB We present the first accurate characterization of high-degree modes, derived using the best Michelson Doppler Imager (MDI) full-disk full-resolution data set available. A 90 day long time series of full-disk 2 arcsec pixel(-1) resolution Dopplergrams was acquired in 2001, thanks to the high rate telemetry provided by the Deep Space Network. These Dopplergrams were spatially decomposed using our best estimate of the image scale and the known components of MDI's image distortion. A multi-taper power spectrum estimator was used to generate power spectra for all degrees and all azimuthal orders, up to l = 1000. We used a large number of tapers to reduce the realization noise, since at high degrees the individual modes blend into ridges and thus there is no reason to preserve a high spectral resolution. These power spectra were fitted for all degrees and all azimuthal orders, between l = 100 and l = 1000, and for all the orders with substantial amplitude. This fitting generated in excess of 5.2x10(6) individual estimates of ridge frequencies, line widths, amplitudes, and asymmetries (singlets), corresponding to some 5700 multiplets (l, n). Fitting at high degrees generates ridge characteristics, characteristics that do not correspond to the underlying mode characteristics. We used a sophisticated forward modeling to recover the best possible estimate of the underlying mode characteristics (mode frequencies, as well as line widths, amplitudes, and asymmetries). We describe in detail this modeling and its validation. The modeling has been extensively reviewed and refined, by including an iterative process to improve its input parameters to better match the observations. Also, the contribution of the leakage matrix on the accuracy of the procedure has been carefully assessed. We present the derived set of corrected mode characteristics, which includes not only frequencies, but line widths, asymmetries, and amplitudes. We present and discuss their uncertainties and the precision of the ridge-to-mode correction schemes, through a detailed assessment of the sensitivity of the model to its input set. The precision of the ridge-to-mode correction is indicative of any possible residual systematic biases in the inferred mode characteristics. In our conclusions, we address how to further improve these estimates, and the implications for other data sets, like GONG+ and HMI.
C1 [Korzennik, S. G.] Harvard Smithsonian Ctr Astrophys, Cambridge, MA 02138 USA.
[Rabello-Soares, M. C.; Schou, J.; Larson, T. P.] Stanford Univ, WW Hansen Expt Phys Lab, Stanford, CA 94305 USA.
RP Korzennik, SG (reprint author), Harvard Smithsonian Ctr Astrophys, 60 Garden St, Cambridge, MA 02138 USA.
RI Rabello Soares, Maria Cristina/C-3207-2013;
OI Rabello Soares, Maria Cristina/0000-0003-0172-3713
FU NASA at Stanford University [NAG5-8878, NAG5-10483]; Stanford [PR-6333];
NASA [NAG5-9819, NNG05GD58G]
FX The Solar Oscillations Investigation-Michelson Doppler Imager project on
SOHO is supported by NASA grant NAG5-8878 and NAG5-10483 at Stanford
University. SOHO is a project of international cooperation between ESA
and NASA. S. G. K. was supported by Stanford contract PR-6333 and NASA
grants NAG5-9819 and NNG05GD58G.
NR 30
TC 6
Z9 6
U1 0
U2 2
PU IOP PUBLISHING LTD
PI BRISTOL
PA TEMPLE CIRCUS, TEMPLE WAY, BRISTOL BS1 6BE, ENGLAND
SN 0004-637X
J9 ASTROPHYS J
JI Astrophys. J.
PD AUG 1
PY 2013
VL 772
IS 2
AR 87
DI 10.1088/0004-637X/772/2/87
PG 28
WC Astronomy & Astrophysics
SC Astronomy & Astrophysics
GA 186EL
UT WOS:000322024700009
ER
PT J
AU Lohfink, AM
Reynolds, CS
Jorstad, SG
Marscher, AP
Miller, ED
Aller, H
Aller, MF
Brenneman, LW
Fabian, AC
Miller, JM
Mushotzky, RF
Nowak, MA
Tombesi, F
AF Lohfink, Anne M.
Reynolds, Christopher S.
Jorstad, Svetlana G.
Marscher, Alan P.
Miller, Eric D.
Aller, Hugh
Aller, Margo F.
Brenneman, Laura W.
Fabian, Andrew C.
Miller, Jon M.
Mushotzky, Richard F.
Nowak, Michael A.
Tombesi, Francesco
TI AN X-RAY VIEW OF THE JET CYCLE IN THE RADIO-LOUD AGN 3C120
SO ASTROPHYSICAL JOURNAL
LA English
DT Article
DE black hole physics; galaxies: individual (3C120); galaxies: jets;
galaxies: nuclei; radio continuum: galaxies; X-rays: galaxies
ID ACTIVE GALACTIC NUCLEI; BLACK-HOLE SPIN; GALAXY 3C 120; ACCRETION-DISK;
XMM-NEWTON; RELATIVISTIC JETS; MAGNETOHYDRODYNAMIC SIMULATIONS;
EMISSION-LINES; IRON LINES; CONNECTION
AB We present a study of the central engine in the broad-line radio galaxy 3C120 using a multi-epoch analysis of a deep XMM-Newton observation and two deep Suzaku pointings (in 2012). In order to place our spectral data into the context of the disk-disruption/jet-ejection cycles displayed by this object, we monitor the source in the UV/X-ray bands, and in the radio band. We find three statistically acceptable spectral models: a disk-reflection model, a jet model, and a jet+disk model. Despite being good descriptions of the data, the disk-reflection model violates the radio constraints on the inclination, and the jet model has a fine-tuning problem, requiring a jet contribution exceeding that expected. Thus, we argue for a composite jet+disk model. Within the context of this model, we verify the basic predictions of the jet-cycle paradigm, finding a truncated/refilling disk during the Suzaku observations and a complete disk extending down to the innermost stable circular orbit during the XMM-Newton observation. The idea of a refilling disk is further supported by the detection of the ejection of a new jet knot approximately one month after the Suzaku pointings. We also discover a step-like event in one of the Suzaku pointings in which the soft band lags the hard band. We suggest that we are witnessing the propagation of a disturbance from the disk into the jet on a timescale set by the magnetic field.
C1 [Lohfink, Anne M.; Reynolds, Christopher S.; Mushotzky, Richard F.; Tombesi, Francesco] Univ Maryland, Dept Astron, College Pk, MD 20742 USA.
[Lohfink, Anne M.; Reynolds, Christopher S.; Mushotzky, Richard F.; Tombesi, Francesco] Univ Maryland, Joint Space Sci Inst JSI, College Pk, MD 20742 USA.
[Jorstad, Svetlana G.; Marscher, Alan P.] Boston Univ, Inst Astrophys Res, Boston, MA 02215 USA.
[Jorstad, Svetlana G.] St Petersburg State Univ, Astron Inst, St Petersburg 198504, Russia.
[Miller, Eric D.; Nowak, Michael A.] MIT, Kavli Inst Astrophys, Cambridge, MA 02139 USA.
[Aller, Hugh; Aller, Margo F.; Miller, Jon M.] Univ Michigan, Dept Astron, Ann Arbor, MI 48109 USA.
[Brenneman, Laura W.] Harvard Smithsonian Ctr Astrophys, Cambridge, MA 02138 USA.
[Fabian, Andrew C.] Univ Cambridge, Inst Astron, Cambridge CB3 0HA, England.
RP Lohfink, AM (reprint author), Univ Maryland, Dept Astron, College Pk, MD 20742 USA.
EM alohfink@astro.umd.edu
RI Jorstad, Svetlana/H-6913-2013; XRAY, SUZAKU/A-1808-2009
OI Jorstad, Svetlana/0000-0001-9522-5453;
FU NASA [NNX12AE13G, NNX11AQ03G]; NSF grant [AST-907893]; Royal Society
FX The authors thank the anonymous referee for comments that improved this
manuscript. We thank Phil Cowperthwaite, Javier Garcia, and Abdu Zoghbi
for useful discussions throughout the duration of this work. A.M.L. and
C.S.R. gratefully acknowledge NASA for support under the Astrophysical
Data Analysis Program (ADAP) grant NNX12AE13G. The research at Boston
University was supported by NSF grant AST-907893 and NASA grant
NNX11AQ03G. The VLBA is operated by the National Radio Astronomy
Observatory. The National Radio Astronomy Observatory is a facility of
the National Science Foundation operated under cooperative agreement by
Associated Universities, Inc.. A.C.F. thanks the Royal Society for
support.
NR 58
TC 29
Z9 29
U1 0
U2 7
PU IOP PUBLISHING LTD
PI BRISTOL
PA TEMPLE CIRCUS, TEMPLE WAY, BRISTOL BS1 6BE, ENGLAND
SN 0004-637X
EI 1538-4357
J9 ASTROPHYS J
JI Astrophys. J.
PD AUG 1
PY 2013
VL 772
IS 2
AR 83
DI 10.1088/0004-637X/772/2/83
PG 13
WC Astronomy & Astrophysics
SC Astronomy & Astrophysics
GA 186EL
UT WOS:000322024700005
ER
PT J
AU Luo, B
Brandt, WN
Alexander, DM
Harrison, FA
Stern, D
Bauer, FE
Boggs, SE
Christensen, FE
Comastri, A
Craig, WW
Fabian, AC
Farrah, D
Fiore, F
Fuerst, F
Grefenstette, BW
Hailey, CJ
Hickox, R
Madsen, KK
Matt, G
Ogle, P
Risaliti, G
Saez, C
Teng, SH
Walton, DJ
Zhang, WW
AF Luo, B.
Brandt, W. N.
Alexander, D. M.
Harrison, F. A.
Stern, D.
Bauer, F. E.
Boggs, S. E.
Christensen, F. E.
Comastri, A.
Craig, W. W.
Fabian, A. C.
Farrah, D.
Fiore, F.
Fuerst, F.
Grefenstette, B. W.
Hailey, C. J.
Hickox, R.
Madsen, K. K.
Matt, G.
Ogle, P.
Risaliti, G.
Saez, C.
Teng, S. H.
Walton, D. J.
Zhang, W. W.
TI WEAK HARD X-RAY EMISSION FROM TWO BROAD ABSORPTION LINE QUASARS OBSERVED
WITH NuSTAR: COMPTON-THICK ABSORPTION OR INTRINSIC X-RAY WEAKNESS?
SO ASTROPHYSICAL JOURNAL
LA English
DT Article
DE accretion, accretion disks; galaxies: active; galaxies: nuclei; quasars:
absorption lines; quasars: emission lines; X-rays: general
ID ACTIVE GALACTIC NUCLEI; DIGITAL SKY SURVEY; SPECTRAL
ENERGY-DISTRIBUTIONS; OPTICALLY SELECTED QUASARS; XMM-NEWTON
SPECTROSCOPY; HUBBLE-SPACE-TELESCOPE; ACCRETION DISK WINDS; RADIO-LOUD
QUASARS; SEYFERT 1 GALAXIES; 7TH DATA RELEASE
AB We present Nuclear Spectroscopic Telescope Array (NuSTAR) hard X-ray observations of two X-ray weak broad absorption line (BAL) quasars, PG 1004+130 (radio loud) and PG 1700+518 (radio quiet). Many BAL quasars appear X-ray weak, probably due to absorption by the shielding gas between the nucleus and the accretion-disk wind. The two targets are among the optically brightest BAL quasars, yet they are known to be significantly X-ray weak at rest-frame 2-10 keV (16-120 times fainter than typical quasars). We would expect to obtain approximate to 400-600 hard X-ray (greater than or similar to 10 keV) photons with NuSTAR, provided that these photons are not significantly absorbed (N-H less than or similar to 10(24) cm(-2)). However, both BAL quasars are only detected in the softer NuSTAR bands (e.g., 4-20 keV) but not in its harder bands (e.g., 20-30 keV), suggesting that either the shielding gas is highly Compton-thick or the two targets are intrinsically X-ray weak. We constrain the column densities for both to be N-H approximate to 7 x 10(24) cm(-2) if the weak hard X-ray emission is caused by obscuration from the shielding gas. We discuss a few possibilities for how PG 1004+130 could have Compton-thick shielding gas without strong Fe K alpha line emission; dilution from jet-linked X-ray emission is one likely explanation. We also discuss the intrinsic X-ray weakness scenario based on a coronal-quenching model relevant to the shielding gas and disk wind of BAL quasars. Motivated by our NuSTAR results, we perform a Chandra stacking analysis with the Large Bright Quasar Survey BAL quasar sample and place statistical constraints upon the fraction of intrinsically X-ray weak BAL quasars; this fraction is likely 17%-40%.
C1 [Luo, B.; Brandt, W. N.] Penn State Univ, Dept Astron & Astrophys, University Pk, PA 16802 USA.
[Luo, B.; Brandt, W. N.] Penn State Univ, Inst Gravitat & Cosmos, University Pk, PA 16802 USA.
[Alexander, D. M.; Hickox, R.] Univ Durham, Dept Phys, Durham DH1 3LE, England.
[Harrison, F. A.; Fuerst, F.; Grefenstette, B. W.; Madsen, K. K.; Walton, D. J.] CALTECH, Cahill Ctr Astron & Astrophys, Pasadena, CA 91125 USA.
[Stern, D.] CALTECH, Jet Prop Lab, Pasadena, CA 91109 USA.
[Bauer, F. E.; Saez, C.] Pontificia Univ Catolica Chile, Dept Astron & Astrofis, Santiago 22, Chile.
[Bauer, F. E.] Space Sci Inst, Boulder, CO 80301 USA.
[Boggs, S. E.; Craig, W. W.] Univ Calif Berkeley, Space Sci Lab, Berkeley, CA 94720 USA.
[Christensen, F. E.] Tech Univ Denmark, DTU Space Natl Space Inst, DK-2800 Lyngby, Denmark.
[Comastri, A.] INAF, Osservatorio Astron Bologna, I-40127 Bologna, Italy.
[Craig, W. W.] Lawrence Livermore Natl Lab, Livermore, CA 94550 USA.
[Fabian, A. C.] Univ Cambridge, Inst Astron, Cambridge CB3 0HA, England.
[Farrah, D.] Virginia Tech, Dept Phys, Blacksburg, VA 24061 USA.
[Fiore, F.] Osserv Astron Roma, I-00040 Monte Porzio Catone, Italy.
[Hailey, C. J.] Columbia Univ, Columbia Astrophys Lab, New York, NY 10027 USA.
[Hickox, R.] Dartmouth Coll, Dept Phys & Astron, Hanover, NH 03755 USA.
[Matt, G.] Univ Roma Tre, Dipartimento Matemat & Fis, I-00146 Rome, Italy.
[Ogle, P.] CALTECH, IPAC, Pasadena, CA 91125 USA.
[Risaliti, G.] INAF, Osservatorio Astrofis Arcetri, I-50125 Florence, Italy.
[Risaliti, G.] Harvard Smithsonian Ctr Astrophys, Cambridge, MA 02138 USA.
[Teng, S. H.] NASA, Goddard Space Flight Ctr, Observat Cosmol Lab, Greenbelt, MD 20771 USA.
[Zhang, W. W.] NASA, Goddard Space Flight Ctr, Greenbelt, MD 20771 USA.
RP Luo, B (reprint author), Penn State Univ, Dept Astron & Astrophys, 525 Davey Lab, University Pk, PA 16802 USA.
RI Boggs, Steven/E-4170-2015; Brandt, William/N-2844-2015; Comastri,
Andrea/O-9543-2015;
OI Boggs, Steven/0000-0001-9567-4224; Brandt, William/0000-0002-0167-2453;
Comastri, Andrea/0000-0003-3451-9970; Risaliti,
Guido/0000-0002-3556-977X; Alexander, David/0000-0002-5896-6313; Fiore,
Fabrizio/0000-0002-4031-4157
FU California Institute of Technology (Caltech) NuSTAR [44A-1092750]; NASA
ADP Grant [NNX10AC99G]; Leverhulme trust; Science Technology and
Facilities Council; Basal-CATA [PFB-06/2007]; CONICYT-Chile [FONDECYT
1101024, Anillo ACT1101, FONDECYT 3120198]; NASA [NNG08FD60C]; National
Aeronautics and Space Administration
FX We acknowledge support from the California Institute of Technology
(Caltech) NuSTAR subcontract 44A-1092750 (B.L. and W.N.B.), NASA ADP
Grant NNX10AC99G (B.L. and W.N.B.), the Leverhulme trust and the Science
Technology and Facilities Council (D.M.A.), Basal-CATA Grant PFB-06/2007
and CONICYT-Chile Grants FONDECYT 1101024 and Anillo ACT1101 (F.E.B.),
and CONICYT-Chile Grant FONDECYT 3120198 (C.S.). We thank M. Young for
help with the planning of this project and K. Forster for help with the
NuSTAR data access, and we thank M. Balokovic, K. Boydstun, T. N. Lu, B.
P. Miller, Jianfeng Wu, and T. Yaqoob for helpful discussions. We thank
the referee, S. C. Gallagher, for carefully reviewing the manuscript and
providing helpful comments.; This work was supported under NASA contract
No. NNG08FD60C, and made use of data from the NuSTAR mission, a project
led by Caltech, managed by the Jet Propulsion Laboratory, and funded by
the National Aeronautics and Space Administration. We thank the NuSTAR
Operations, Software and Calibration teams for support with the
execution and analysis of these observations. This research has made use
of NuSTAR-DAS jointly developed by the ASI Science Data Center (ASDC,
Italy) and Caltech (USA).
NR 146
TC 24
Z9 24
U1 0
U2 12
PU IOP PUBLISHING LTD
PI BRISTOL
PA TEMPLE CIRCUS, TEMPLE WAY, BRISTOL BS1 6BE, ENGLAND
SN 0004-637X
J9 ASTROPHYS J
JI Astrophys. J.
PD AUG 1
PY 2013
VL 772
IS 2
AR 153
DI 10.1088/0004-637X/772/2/153
PG 17
WC Astronomy & Astrophysics
SC Astronomy & Astrophysics
GA 186EL
UT WOS:000322024700075
ER
PT J
AU Milisavljevic, D
Fesen, RA
AF Milisavljevic, Dan
Fesen, Robert A.
TI A DETAILED KINEMATIC MAP OF CASSIOPEIA A'S OPTICAL MAIN SHELL AND OUTER
HIGH-VELOCITY EJECTA
SO ASTROPHYSICAL JOURNAL
LA English
DT Article
DE ISM: individual objects (Cassiopeia A); ISM: supernova remnants;
supernovae: general
ID CORE-COLLAPSE SUPERNOVAE; LARGE-MAGELLANIC-CLOUD; X-RAY; REMNANT
CASSIOPEIA; 3-DIMENSIONAL STRUCTURE; PROPER MOTIONS; LIGHT ECHOES; A
SUPERNOVA; MAGNETOROTATIONAL INSTABILITY; STRIPPED-ENVELOPE
AB We present three-dimensional (3D) kinematic reconstructions of optically emitting material in the young Galactic supernova remnant Cassiopeia A (Cas A). These Doppler maps have the highest spectral and spatial resolutions of any previous survey of Cas A and represent the most complete catalog of its optically emitting material to date. We confirm that the bulk of Cas A's optically bright ejecta populate a torus-like geometry tilted approximately 30 degrees with respect to the plane of the sky with a -4000 to +6000 km s(-1) radial velocity asymmetry. Near-tangent viewing angle effects and an inhomogeneous surrounding circumstellar material/interstellar medium environment suggest that this geometry and velocity asymmetry may not be faithfully representative of the remnant's true 3D structure or the kinematic properties of the original explosion. The majority of the optical ejecta are arranged in several well-defined and nearly circular ring-like structures with diameters between approximately 30 '' (0.5 pc) and 2' (2 pc). These ejecta rings appear to be a common phenomenon of young core-collapse remnants and may be associated with post-explosion input of energy from plumes of radioactive Ni-56-rich ejecta that rise, expand, and compress non-radioactive material. Our optical survey encompasses Cas A's faint outlying ejecta knots and exceptionally high-velocity NE and SW streams of S-rich debris often referred to as "jets." These outer knots, which exhibit a chemical make-up suggestive of an origin deep within the progenitor star, appear to be arranged in opposing and wide-angle outflows with opening half-angles of approximate to 40 degrees.
C1 [Milisavljevic, Dan] Harvard Smithsonian Ctr Astrophys, Cambridge, MA 02138 USA.
[Fesen, Robert A.] Dartmouth Coll, Dept Phys & Astron, Wilder Lab 6127, Hanover, NH 03755 USA.
RP Milisavljevic, D (reprint author), Harvard Smithsonian Ctr Astrophys, 60 Garden St, Cambridge, MA 02138 USA.
EM dmilisav@cfa.harvard.edu
FU National Science Foundation [AST-0908237]; NASA [NAS 5-26555]
FX We thank an anonymous referee for comments that improved this paper's
content and presentation. D. Patnaude, R. Chevalier, J. Thorstensen and
G. Wegner provided helpful discussions and comments. T. DeLaney kindly
provided infrared and X-ray data in advance of publication. David
Adalsteinsson provided considerable support with the DataTank software
(http://www.visualdatatools.com), which was used to prepare some figures
and the animations. Surface reconstruction was aided with the use of
MeshLab (http://meshlab.sourceforge.net), a tool developed with the
support of the 3D-CoForm project. This material is based upon work
supported by the National Science Foundation under grant No.
AST-0908237.; This material is also based on observations made with the
NASA/ESA Hubble Space Telescope, obtained from the data archive at the
Space Telescope Science Institute. STScI is operated by the Association
of Universities for Research in Astronomy, Inc. under NASA contract NAS
5-26555.
NR 85
TC 22
Z9 22
U1 0
U2 3
PU IOP PUBLISHING LTD
PI BRISTOL
PA TEMPLE CIRCUS, TEMPLE WAY, BRISTOL BS1 6BE, ENGLAND
SN 0004-637X
J9 ASTROPHYS J
JI Astrophys. J.
PD AUG 1
PY 2013
VL 772
IS 2
AR 134
DI 10.1088/0004-637X/772/2/134
PG 15
WC Astronomy & Astrophysics
SC Astronomy & Astrophysics
GA 186EL
UT WOS:000322024700056
ER
PT J
AU Socrates, A
Sironi, L
AF Socrates, Aristotle
Sironi, Lorenzo
TI PHOTON FEEDBACK: SCREENING AND THE EDDINGTON LIMIT
SO ASTROPHYSICAL JOURNAL LETTERS
LA English
DT Article
DE dust, extinction; galaxies: general; galaxies: starburst; ISM: jets and
outflows; radiative transfer
ID RADIATION PRESSURE; NONLINEAR EVOLUTION; STELLAR FEEDBACK;
STAR-FORMATION; COSMIC-RAYS; GALAXIES; MASS; WINDS; DISCS; DISKS
AB Bright star-forming galaxies radiate well below their Eddington limits. The value of the flux-mean opacity that mediates the radiation force onto matter is orders of magnitude smaller than the UV or optical dust opacity. On empirical grounds, it is shown that high-redshift ULIRGs radiate at two orders of magnitude below their Eddington limits, while the local starbursters M82 and Arp 220 radiate at a few percent of their Eddington limits. A model for the radiative transfer of UV and optical light in dust-rich environments is considered. Radiation pressure on dust does not greatly affect the large-scale gas dynamics of star-forming galaxies.
C1 [Socrates, Aristotle] Inst Adv Study, Princeton, NJ 08540 USA.
[Sironi, Lorenzo] Harvard Smithsonian Ctr Astrophys, Cambridge, MA 02138 USA.
RP Socrates, A (reprint author), Inst Adv Study, Einstein Dr, Princeton, NJ 08540 USA.
EM socrates@ias.edu; lsironi@cfa.harvard.edu
FU John N. Bahcall Fellowship at the Institute for Advanced Study,
Princeton; NASA through Einstein Postdoctoral Fellowship [PF1-120090];
Chandra X-ray Center; NASA [NAS8-03060]
FX A.S. is supported by a John N. Bahcall Fellowship at the Institute for
Advanced Study, Princeton. L.S. is supported by NASA through Einstein
Postdoctoral Fellowship grant number PF1-120090 awarded by the Chandra
X-ray Center, which is operated by the Smithsonian Astrophysical
Observatory for NASA under contract NAS8-03060. We gratefully thank M.
Michalowski for providing the SED templates of high-redshift ULIRGs, as
well as Jenny Greene and Avi Loeb for comments. We thank the referee,
Eliot Quataert, for providing constructive comments.
NR 27
TC 4
Z9 4
U1 1
U2 2
PU IOP PUBLISHING LTD
PI BRISTOL
PA TEMPLE CIRCUS, TEMPLE WAY, BRISTOL BS1 6BE, ENGLAND
SN 2041-8205
J9 ASTROPHYS J LETT
JI Astrophys. J. Lett.
PD AUG 1
PY 2013
VL 772
IS 2
AR L21
DI 10.1088/2041-8205/772/2/L21
PG 5
WC Astronomy & Astrophysics
SC Astronomy & Astrophysics
GA 186CR
UT WOS:000322020000008
ER
PT J
AU Bret, A
Stockem, A
Fiuza, F
Ruyer, C
Gremillet, L
Narayan, R
Silva, LO
AF Bret, Antoine
Stockem, A.
Fiuza, F.
Ruyer, C.
Gremillet, L.
Narayan, R.
Silva, L. O.
TI Relativistic collisionless shocks formation in pair plasmas
SO JOURNAL OF PLASMA PHYSICS
LA English
DT Article
ID PARTICLE-ACCELERATION; INSTABILITIES; ELECTRONS; BEAM
AB Collisionless shocks are ubiquitous in astrophysics and in the laboratory. Recent numerical simulations and experiments have shown how these can arise from the encounter of two collisionless plasma shells. When the shells interpenetrate, the overlapping region turns unstable, triggering the shock formation. As a first step toward a microscopic understanding of the process, we here analyze in detail the initial instability phase. On the one hand, 2D relativistic PIC simulations are performed where two unmagnetized, symmetric, and initially cold pair plasmas collide. On the other hand, the instabilities at work are analyzed, as well as the field at saturation and the seed field which gets amplified. For mildly relativistic motions and onward, Weibel modes with omega = 0 + i delta govern the linear phase. We derive an expression for the duration of the linear phase in reasonable agreement with the simulations.
C1 [Bret, Antoine] Univ Castilla La Mancha, ETSI Ind, E-13071 Ciudad Real, Spain.
[Stockem, A.; Fiuza, F.; Silva, L. O.] Inst Super Tecn, GoLP Inst Plasmas & Fusao Nucl, Lab Assoc, Lisbon, Portugal.
[Ruyer, C.; Gremillet, L.] CEA, DAM, DIF, F-91297 Arpajon, France.
[Narayan, R.] Harvard Smithsonian Ctr Astrophys, Cambridge, MA 02138 USA.
RP Bret, A (reprint author), Univ Castilla La Mancha, ETSI Ind, E-13071 Ciudad Real, Spain.
EM antoineclaude.bret@uclm.es
RI Silva, Luis/C-3169-2009; Bret, Antoine/C-9112-2009;
OI Silva, Luis/0000-0003-2906-924X; Bret, Antoine/0000-0003-2030-0046;
Fiuza, Frederico/0000-0002-8502-5535; Stockem, Anne
Gabriele/0000-0003-4614-8118; Narayan, Ramesh/0000-0002-1919-2730
FU Spanish Ministerio de Educacion y Ciencia [ENE2009-09276]; European
Research Council [267841]; FCT (Portugal) [PTDC/FIS/111720/2009,
SFRH/BD/38952/2007]
FX This work was supported by projects ENE2009-09276 of the Spanish
Ministerio de Educacion y Ciencia, the European Research Council
(ERC-2010-AdG Grant 267841), and FCT (Portugal) grants
PTDC/FIS/111720/2009 and SFRH/BD/38952/2007. Thanks are due to Lorenzo
Sironi for useful discussions.
NR 20
TC 1
Z9 1
U1 0
U2 13
PU CAMBRIDGE UNIV PRESS
PI NEW YORK
PA 32 AVENUE OF THE AMERICAS, NEW YORK, NY 10013-2473 USA
SN 0022-3778
EI 1469-7807
J9 J PLASMA PHYS
JI J. Plasma Phys.
PD AUG
PY 2013
VL 79
BP 367
EP 370
DI 10.1017/S0022377813000354
PN 4
PG 4
WC Physics, Fluids & Plasmas
SC Physics
GA 189ER
UT WOS:000322250600003
ER
PT J
AU van der Sande, MT
Poorter, L
Schnitzer, SA
Markesteijn, L
AF van der Sande, Masha T.
Poorter, Lourens
Schnitzer, Stefan A.
Markesteijn, Lars
TI Are lianas more drought-tolerant than trees? A test for the role of
hydraulic architecture and other stem and leaf traits
SO OECOLOGIA
LA English
DT Article
DE Panama; Drought tolerance; Functional traits; Cavitation resistance;
Hydraulic conductivity; Lianas; Saplings
ID DRY FOREST CANOPY; TROPICAL FOREST; XYLEM CAVITATION; FUNCTIONAL TRAITS;
LOWLAND FOREST; WOODY-PLANTS; TRADE-OFFS; GROWTH; VULNERABILITY;
STRATEGIES
AB Lianas are an important component of Neotropical forests, where evidence suggests that they are increasing in abundance and biomass. Lianas are especially abundant in seasonally dry tropical forests, and as such it has been hypothesized that they are better adapted to drought, or that they are at an advantage under the higher light conditions in these forests. However, the physiological and morphological characteristics that allow lianas to capitalize more on seasonal forest conditions compared to trees are poorly understood. Here, we evaluate how saplings of 21 tree and liana species from a seasonal tropical forest in Panama differ in cavitation resistance (P (50)) and maximum hydraulic conductivity (K (h)), and how saplings of 24 tree and liana species differ in four photosynthetic leaf traits (e.g., maximum assimilation and stomatal conductance) and six morphological leaf and stem traits (e.g., wood density, maximum vessel length, and specific leaf area). At the sapling stage, lianas had a lower cavitation resistance than trees, implying lower drought tolerance, and they tended to have a higher potential hydraulic conductivity. In contrast to studies focusing on adult trees and lianas, we found no clear differences in morphological and photosynthetic traits between the life forms. Possibly, lianas and trees are functionally different at later ontogenetic stages, with lianas having deeper root systems than trees, or experience their main growth advantage during wet periods, when they are less vulnerable to cavitation and can achieve high conductivity. This study shows, however, that the hydraulic characteristics and functional traits that we examined do not explain differences in liana and tree distributions in seasonal forests.
C1 [van der Sande, Masha T.; Poorter, Lourens] Univ Wageningen & Res Ctr, Forest Ecol & Forest Management Grp, NL-6700 AA Wageningen, Netherlands.
[Schnitzer, Stefan A.; Markesteijn, Lars] Univ Wisconsin, Dept Biol Sci, Milwaukee, WI 53201 USA.
[Schnitzer, Stefan A.; Markesteijn, Lars] Smithsonian Trop Res Inst, Balboa, Panama.
RP van der Sande, MT (reprint author), Univ Wageningen & Res Ctr, Forest Ecol & Forest Management Grp, POB 47, NL-6700 AA Wageningen, Netherlands.
EM masha.vandersande@wur.nl
OI Schnitzer, Stefan/0000-0002-2715-9455; van der Sande,
Masha/0000-0002-6845-2308
FU Netherlands Organisation for Scientific Research (NWO); US National
Science Foundation [NSF DEB-0613666, NSF DEB-0845071, NSF DEB-1019436];
Stichting Fonds Dr. Christine Buisman
FX This research was financially supported by a Rubicon grant by the
Netherlands Organisation for Scientific Research (NWO) to L. M., and by
US National Science Foundation grants (NSF DEB-0613666, NSF DEB-0845071,
NSF DEB-1019436) to S. A. S. M.v.d.S. was supported by a travel grant by
Stichting Fonds Dr. Christine Buisman. We thank the Smitsonian Tropical
Research Institute for the use of facilities, David Brassfield and
Oldemar Valdez for field assistance and initial species identification,
and two anonymous reviewers for valuable comments on an earlier
manuscript.
NR 48
TC 17
Z9 19
U1 7
U2 116
PU SPRINGER
PI NEW YORK
PA 233 SPRING ST, NEW YORK, NY 10013 USA
SN 0029-8549
J9 OECOLOGIA
JI Oecologia
PD AUG
PY 2013
VL 172
IS 4
BP 961
EP 972
DI 10.1007/s00442-012-2563-x
PG 12
WC Ecology
SC Environmental Sciences & Ecology
GA 188GF
UT WOS:000322180000005
PM 23277211
ER
PT J
AU Patrick, CJ
Fernandez, DH
AF Patrick, Christopher J.
Fernandez, Dylan H.
TI The beta-richness of two detritivore caddisflies affects fine organic
matter export
SO OECOLOGIA
LA English
DT Article
DE Meta-ecosystem; Decomposition; Spatial distribution; Network; Subsidy
ID ECOSYSTEM FUNCTION; FOREST STREAM; BIOTIC HOMOGENIZATION;
POPULATION-DYNAMICS; SPECIES-DIVERSITY; PATCH DYNAMICS; BIODIVERSITY;
ECOLOGY; METACOMMUNITY; DECOMPOSITION
AB We used stream networks as a model system to test whether the ecosystem function, upstream production, and export of fine organic particles, an important subsidy to downstream habitats, would vary between two stream networks with identical detritivore species but different spatial distributions (i.e. high or low beta-richness). Our experiment employed artificial stream networks with two simulated tributaries. We used two species of detritivorous caddisflies, Lepidostoma sp. and Pycnopsyche guttifer, in either sympatry (low beta-richness) or allopatry (high beta-richness) in the tributaries of each network. The tributaries were given either senesced or green speckled alder (Alnus incana rugosa). In the networks with senesced leaves, particle export was more than twice as great when the detritivores were in allopatry whereas interference competition in sympatry reduced particle export. In the networks with green leaves, particle export did not significantly vary between the allopatric and sympatric distributions because the interference competition was reduced and the two species had similar feeding rates on green leaves. Humans are altering beta-richness by homogenizing or differentiating flora and fauna across habitats; however, little is known about how altering this type of biodiversity will affect ecosystem functions. Our experimental manipulation is a simple version of a change in the beta-richness of the detritivores in a more complex stream network in nature. These results may indicate that shifts in species distributions across sites may significantly affect ecosystem functions, even when no species are lost from a watershed.
C1 [Patrick, Christopher J.] Smithsonian Environm Res Ctr, Edgewater, MD 21037 USA.
[Patrick, Christopher J.; Fernandez, Dylan H.] Univ Notre Dame, Dept Biol Sci, Notre Dame, IN 46656 USA.
[Fernandez, Dylan H.] Univ Wisconsin, Coll Nat Resources, Stevens Point, WI 54481 USA.
RP Patrick, CJ (reprint author), Smithsonian Environm Res Ctr, 647 Contees Wharf Rd,POB 28, Edgewater, MD 21037 USA.
EM patrickc@si.edu; Fernandez@uwsp.edu
FU University of Notre Dame Environmental Research Center; Notre Dame
Center for Environmental Science and Technology; NSF IGERT [0504495]
FX Many thanks go to Gary Belovsky for helpful comments and critique that
significantly improved the quality of this manuscript. We also thank
Todd Crowl, Jennifer Tank, and Jason McLachlan for advice and guidance
during the design of this experiment. This work was funded by the
University of Notre Dame Environmental Research Center, Notre Dame
Center for Environmental Science and Technology, and NSF IGERT grant
award # 0504495.
NR 65
TC 1
Z9 1
U1 2
U2 36
PU SPRINGER
PI NEW YORK
PA 233 SPRING ST, NEW YORK, NY 10013 USA
SN 0029-8549
J9 OECOLOGIA
JI Oecologia
PD AUG
PY 2013
VL 172
IS 4
BP 1105
EP 1115
DI 10.1007/s00442-012-2550-2
PG 11
WC Ecology
SC Environmental Sciences & Ecology
GA 188GF
UT WOS:000322180000018
PM 23247687
ER
PT J
AU Klimesova, J
Dolezal, J
St'astna, P
AF Klimesova, Jitka
Dolezal, Jiri
St'astna, Petra
TI Growth of the alpine herb Rumex alpinus over two decades: effect of
climate fluctuations and local conditions
SO PLANT ECOLOGY
LA English
DT Article
DE Herb-chronology; Low Tatra Mts.; Rumex alpinus
ID CASSIOPE-TETRAGONA; ALTITUDINAL CHANGES; PERENNIAL FORBS; DWARF SHRUBS;
VEGETATION; TEMPERATURE; PRECIPITATION; DIVERGENCE; PHENOLOGY; SNOWBANK
AB Plants in arctic and alpine habitats could potentially escape the effects of climatic fluctuations by surviving in suitable microsites. We tested this hypothesis by conducting a herb-chronological analysis of the morphological growth markers retained on the rhizomes of the clonal herb Rumex alpinus-a common plant with a broad ecological amplitude found in the alpine zone of the Low Tatra Mts., Western Carpathians, Slovakia. We asked whether aspects of plant growth were related to the climatic conditions measured at a local weather station over two approximately decade-long study periods (1977-1988 and 2001-2010) on both snowbed and non-snowbed sites. Although the latter period had average summer temperatures that were about 2 A degrees C warmer than the first, both had the same average growing season length and average total monthly precipitation. Snow accumulation and other climatic events shortened the growing seasons for the plants in the first period, thus reducing vegetative growth. On the other hand, climatic events prolonging the growing seasons supported plant growth and flowering in the snowbed site. In the second, warmer period, growing season lengths were not related to plant performance but August temperatures had a positive effect on plant growth in both the snowbed and non-snowbed sites. Our results imply that mesoclimatic factors substantially affect plant growth, although their relative importance might change with climate fluctuations altering their influence in sites of differing snow accumulation.
C1 [Klimesova, Jitka; Dolezal, Jiri] Acad Sci Czech Republic, Inst Bot, Sect Plant Ecol, CS-37982 Trebon, Czech Republic.
[Dolezal, Jiri] Univ South Bohemia, Fac Sci, Ceske Budejovice 37005, Czech Republic.
[St'astna, Petra] Krkonose Mts Natl Pk Adm, Vrchlabi 54301, Czech Republic.
RP Klimesova, J (reprint author), Smithsonian Environm Res Ctr, 647 Contees Wharf Rd, Edgewater, MD 21037 USA.
EM klimesova@butbn.cas.cz; dolezal@butbn.cas.cz; pstastna@krnap.cz
RI Klimesova, Jitka/A-1525-2009; Dolezal, Jiri/H-1583-2014
FU Grant agency of the Czech Republic [GA526/09/0963]; long-term research
development project of Institute of Botany ASCR [RVO 67985939]; GACR
[13-13368S]; University of South Bohemia [GAJU 138/2010/P]
FX We dedicate the work to memory of our late colleague Leos Klimes who
participated on the first sampling of Rumex alpinus. English corrections
were kindly provided by Brian McMillan, invaluable comments were
provided by Dennis Whigham. Study was partly supported by Grant agency
of the Czech Republic GA526/09/0963 and by a long-term research
development project of Institute of Botany ASCR No. RVO 67985939. JD was
supported during the elaboration of this paper by GACR 13-13368S, and
the University of South Bohemia (GAJU 138/2010/P).
NR 48
TC 0
Z9 0
U1 1
U2 40
PU SPRINGER
PI DORDRECHT
PA VAN GODEWIJCKSTRAAT 30, 3311 GZ DORDRECHT, NETHERLANDS
SN 1385-0237
J9 PLANT ECOL
JI Plant Ecol.
PD AUG
PY 2013
VL 214
IS 8
BP 1071
EP 1084
DI 10.1007/s11258-013-0232-8
PG 14
WC Plant Sciences; Ecology; Forestry
SC Plant Sciences; Environmental Sciences & Ecology; Forestry
GA 186HA
UT WOS:000322031500009
ER
PT J
AU Mozdzer, TJ
Megonigal, JP
AF Mozdzer, Thomas J.
Megonigal, J. Patrick
TI Increased Methane Emissions by an Introduced Phragmites australis
Lineage under Global Change
SO WETLANDS
LA English
DT Article
DE Invasive; Conspecific; Congener; Phragmites; Methane; Greenhouse Gas;
Elevated carbon dioxide; Nitrogen; Wetland
ID ELEVATED CARBON-DIOXIDE; SPARTINA-ALTERNIFLORA; GREENHOUSE GASES;
ATMOSPHERIC CO2; TIDAL WETLANDS; NORTH-AMERICA; COMMON REED; PLANT;
SOIL; INVASION
AB North American wetlands have been invaded by an introduced lineage of the common reed, Phragmites australis. Native lineages occur in North America, but many populations have been extirpated by the introduced conspecific lineage. Little is known about how subtle changes in plant lineage may affect methane (CH4) emissions. Native and introduced Phragmites were grown under current and predicted future levels of atmospheric CO2 and nitrogen(N) pollution in order to understand how CH4 emissions may vary between conspecific lineages. We found introduced Phragmites emitted more CH4 than native Phragmites, and that CH4 emissions increased significantly in both with CO2+N treatment. There was no significant difference in CH4 production potentials, but CH4 oxidation potentials were higher in soils from the introduced lineage. Intraspecific plant responses to resource availability changed CH4 emissions, with plant density, root mass, and leaf area being significantly positively correlated with higher emissions. The absence of CO2-only or N-only effects highlights a limitation on the generalization that CH4 emissions are proportional to plant productivity. Our data suggest that intraspecific changes in plant community composition have important implications for greenhouse emissions. Furthermore, global change-enhanced invasion by introduced Phragmites may increase CH4 emissions unless these factors cause a compensatory increase in carbon sequestration.
C1 [Mozdzer, Thomas J.; Megonigal, J. Patrick] Smithsonian Environm Res Ctr, Edgewater, MD 21037 USA.
[Mozdzer, Thomas J.] Bryn Mawr Coll, Dept Biol, Bryn Mawr, PA 19010 USA.
RP Mozdzer, TJ (reprint author), Bryn Mawr Coll, Dept Biol, 101 N Merion Ave, Bryn Mawr, PA 19010 USA.
EM tmozdzer@brynmawr.edu
RI Mozdzer, Thomas/A-3599-2014
OI Mozdzer, Thomas/0000-0002-1053-0967
FU Smithsonian Institution fellowship
FX We thank D. Gonzalez, N. Mudd, J. Duls, and P. Shands for their
assistance in executing the experiment, and L.A. Meyerson for providing
the propagule material. Funding was provided from a Smithsonian
Institution fellowship to T.J. Mozdzer
NR 37
TC 17
Z9 19
U1 1
U2 74
PU SPRINGER
PI DORDRECHT
PA VAN GODEWIJCKSTRAAT 30, 3311 GZ DORDRECHT, NETHERLANDS
SN 0277-5212
J9 WETLANDS
JI Wetlands
PD AUG
PY 2013
VL 33
IS 4
BP 609
EP 615
DI 10.1007/s13157-013-0417-x
PG 7
WC Ecology; Environmental Sciences
SC Environmental Sciences & Ecology
GA 186DT
UT WOS:000322022900004
ER
PT J
AU Thompson, AR
Adam, TC
Hultgren, KM
Thacker, CE
AF Thompson, Andrew R.
Adam, Thomas C.
Hultgren, Kristin M.
Thacker, Christine E.
TI Ecology and Evolution Affect Network Structure in an Intimate Marine
Mutualism
SO AMERICAN NATURALIST
LA English
DT Article
DE mutualism; network topology; specialization; shrimp goby; forbidden link
ID CRYPTOCENTRUS-STEINITZI PISCES; ALPHEUS-PURPURILENTICULARIS CRUSTACEA;
SHRIMP PARTNER SPECIFICITY; COEVOLUTIONARY NETWORKS; TACTILE
COMMUNICATION; DEMOGRAPHICALLY OPEN; COMMUNITY STRUCTURE; NESTED
STRUCTURE; FOOD WEBS; RED-SEA
AB Elucidating patterns and causes of interaction among mutualistic species is a major focus of ecology, and recent meta-analyses of terrestrial networks show that network-level reciprocal specialization tends to be higher in intimate mutualisms than in nonintimate mutualisms. It is largely unknown, however, whether this pattern holds for and what factors affect specialization in marine mutualisms. Here we present the first analysis of network specialization (H-2') for marine mutualistic networks. Specialization among eight Indo-Pacific networks of obligate mutualistic gobies and shrimps was indistinguishable from that among comparably intimate terrestrial mutualisms (ants-myrmecophytes) and higher than that among nonintimate ones (seed dispersers). Specialization was affected by variability in habitat use for both gobies and shrimps and by phylogenetic history for shrimps. Habitat use was phylogenetically conserved among shrimp, and thus effects of shrimp phylogeny on partner choice were mediated in part by habitat. By contrast, habitat use and pairing patterns in gobies were not related to phylogenetic history. This asymmetry appears to result from evolutionary constraints on partner use in shrimps and convergence among distantly related gobies to utilize burrows provided by multiple shrimp species. Results indicate that the evolution of mutualism is affected by life-history characteristics that transcend environments and that different factors constrain interactions in disparate ecosystems.
C1 [Thompson, Andrew R.] Natl Ocean & Atmospher Adm, Natl Marine Fisheries Serv, Fisheries Resources Div, Southwest Fisheries Sci Ctr, La Jolla, CA 92037 USA.
[Thompson, Andrew R.; Thacker, Christine E.] Nat Hist Museum Angeles Cty, Los Angeles, CA 90007 USA.
[Adam, Thomas C.] Univ Calif Santa Barbara, Coastal Res Ctr, Inst Marine Sci, Santa Barbara, CA 93106 USA.
[Hultgren, Kristin M.] Natl Museum Nat Hist, Smithsonian Inst, Washington, DC 20013 USA.
[Hultgren, Kristin M.] Seattle Univ, Dept Biol, Seattle, WA 98122 USA.
RP Thompson, AR (reprint author), Natl Ocean & Atmospher Adm, Natl Marine Fisheries Serv, Fisheries Resources Div, Southwest Fisheries Sci Ctr, La Jolla, CA 92037 USA.
EM andrew.thompson@noaa.gov
FU W. M. Keck foundation; R. M. Parsons foundation; National Science
Foundation Moorea Coral Reef Long Term Ecological Research project [OCE
04-17412]
FX We are grateful to J. P. Chen, D. Geiger, M. Jeng, I. Karplus, J. S.
White, and B. Wolcott and to the staffs of the Mahonia Na Dari Research
Institute of Kimbe Bay, Papua New Guinea, and the UCB (University of
California, Berkeley) Gump Research Station in Moorea, French Polynesia,
for their support and assistance with fieldwork, collections, and/or
analysis. Comments by N. Bowlin, R. Nisbet, A. Rossberg, S. Sandin, W.
Watson, and two anonymous reviewers improved the manuscript. This work
was supported by grants from the W. M. Keck and R. M. Parsons
foundations in support of the program in Molecular Systematics and
Evolution at the Natural History Museum of Los Angeles County and the
National Science Foundation Moorea Coral Reef Long Term Ecological
Research project (OCE 04-17412). This is contribution 197 of the UCB
Richard B. Gump South Pacific Research Station.
NR 84
TC 8
Z9 8
U1 6
U2 55
PU UNIV CHICAGO PRESS
PI CHICAGO
PA 1427 E 60TH ST, CHICAGO, IL 60637-2954 USA
SN 0003-0147
EI 1537-5323
J9 AM NAT
JI Am. Nat.
PD AUG
PY 2013
VL 182
IS 2
BP E58
EP E72
DI 10.1086/670803
PG 15
WC Ecology; Evolutionary Biology
SC Environmental Sciences & Ecology; Evolutionary Biology
GA 181XI
UT WOS:000321703400003
PM 23852363
ER
PT J
AU Regan, TJ
Taylor, BL
Thompson, GG
Cochrane, JF
Ralls, K
Runge, MC
Merrick, R
AF Regan, Tracey J.
Taylor, Barbara L.
Thompson, Grant G.
Cochrane, Jean Fitts
Ralls, Katherine
Runge, Michael C.
Merrick, Richard
TI Testing Decision Rules for Categorizing Species' Extinction Risk to Help
Develop Quantitative Listing Criteria for the US Endangered Species Act
SO CONSERVATION BIOLOGY
LA English
DT Article
DE Bayesian analysis; loss functions; performance testing; population
viability analysis
ID UNCERTAINTY; ADVICE; MODELS
AB Lack of guidance for interpreting the definitions of endangered and threatened in the U.S. Endangered Species Act (ESA) has resulted in case-by-case decision making leaving the process vulnerable to being considered arbitrary or capricious. Adopting quantitative decision rules would remedy this but requires the agency to specify the relative urgency concerning extinction events over time, cutoff risk values corresponding to different levels of protection, and the importance given to different types of listing errors. We tested the performance of 3 sets of decision rules that use alternative functions for weighting the relative urgency of future extinction events: a threshold rule set, which uses a decision rule of x% probability of extinction over y years; a concave rule set, where the relative importance of future extinction events declines exponentially over time; and a shoulder rule set that uses a sigmoid shape function, where relative importance declines slowly at first and then more rapidly. We obtained decision cutoffs by interviewing several biologists and then emulated the listing process with simulations that covered a range of extinction risks typical of ESA listing decisions. We evaluated performance of the decision rules under different data quantities and qualities on the basis of the relative importance of misclassification errors. Although there was little difference between the performance of alternative decision rules for correct listings, the distribution of misclassifications differed depending on the function used. Misclassifications for the threshold and concave listing criteria resulted in more overprotection errors, particularly as uncertainty increased, whereas errors for the shoulder listing criteria were more symmetrical. We developed and tested the framework for quantitative decision rules for listing species under the U.S. ESA. If policy values can be agreed on, use of this framework would improve the implementation of the ESA by increasing transparency and consistency.
C1 [Regan, Tracey J.] Univ Melbourne, Sch Bot, Parkville, Vic 3010, Australia.
[Regan, Tracey J.; Taylor, Barbara L.] Natl Marine Fisheries Serv, SW Fisheries Sci Ctr, La Jolla, CA 92037 USA.
[Thompson, Grant G.] NOAA, Resource Ecol & Fisheries Management Div, Alaska Fisheries Sci Ctr, Natl Marine Fisheries Serv, Seattle, WA 98115 USA.
[Cochrane, Jean Fitts] US Fish & Wildlife Serv, Endangered Species Program, Arlington, VA 22203 USA.
[Ralls, Katherine] Smithsonian Inst, Natl Zool Pk, Smithsonian Conservat Biol Inst, Washington, DC 20008 USA.
[Runge, Michael C.] US Geol Survey, Patuxent Wildlife Res Ctr, Laurel, MD 20708 USA.
[Merrick, Richard] Natl Marine Fisheries Serv, Off Assistant Administrator, Silver Spring, MD 20910 USA.
RP Regan, TJ (reprint author), Univ Melbourne, Sch Bot, Parkville, Vic 3010, Australia.
EM tregan@unimelb.edu.au
RI Runge, Michael/E-7331-2011
OI Runge, Michael/0000-0002-8081-536X
FU National Marine Fisheries Service; U.S. Fish and Wildlife Service;
National Research Council; Australian Research Council Centre of
Excellence for Environmental Decisions
FX T.J.R. was jointly funded by the National Marine Fisheries Service and
the U.S. Fish and Wildlife Service through a fellowship with the
National Research Council and the Australian Research Council Centre of
Excellence for Environmental Decisions. We thank L. Maguire, M. Nammack,
T. Ragen, and S. Rumsey for expert advice; and A. Read, P. Boveng, P.
Wade, and M. Burgman for their useful comments. We honour the passing of
Dr. Dan Goodman who provided software and intellectual stimulation for
this project. Dan devoted much of his career to integrating decision
theory into conservation biology and his mentoring was very important to
several authors of this work.
NR 34
TC 8
Z9 8
U1 0
U2 46
PU WILEY-BLACKWELL
PI HOBOKEN
PA 111 RIVER ST, HOBOKEN 07030-5774, NJ USA
SN 0888-8892
J9 CONSERV BIOL
JI Conserv. Biol.
PD AUG
PY 2013
VL 27
IS 4
BP 821
EP 831
DI 10.1111/cobi.12055
PG 11
WC Biodiversity Conservation; Ecology; Environmental Sciences
SC Biodiversity & Conservation; Environmental Sciences & Ecology
GA 185PB
UT WOS:000321980800019
PM 23646933
ER
PT J
AU Sanchez, AG
Kazin, EA
Beutler, F
Chuang, CH
Cuesta, AJ
Eisenstein, DJ
Manera, M
Montesano, F
Nichol, RC
Padmanabhan, N
Percival, W
Prada, F
Ross, AJ
Schlegel, DJ
Tinker, J
Tojeiro, R
Weinberg, DH
Xu, XY
Brinkmann, J
Brownstein, JR
Schneider, DP
Thomas, D
AF Sanchez, Ariel G.
Kazin, Eyal A.
Beutler, Florian
Chuang, Chia-Hsun
Cuesta, Antonio J.
Eisenstein, Daniel J.
Manera, Marc
Montesano, Francesco
Nichol, Robert C.
Padmanabhan, Nikhil
Percival, Will
Prada, Francisco
Ross, Ashley J.
Schlegel, David J.
Tinker, Jeremy
Tojeiro, Rita
Weinberg, David H.
Xu, Xiaoying
Brinkmann, J.
Brownstein, Joel R.
Schneider, Donald P.
Thomas, Daniel
TI The clustering of galaxies in the SDSS-III Baryon Oscillation
Spectroscopic Survey: cosmological constraints from the full shape of
the clustering wedges
SO MONTHLY NOTICES OF THE ROYAL ASTRONOMICAL SOCIETY
LA English
DT Article
DE cosmological parameters; large-scale structure of Universe
ID DIGITAL SKY SURVEY; LUMINOUS RED GALAXIES; REDSHIFT-SPACE DISTORTIONS;
PROBE WMAP OBSERVATIONS; MICROWAVE BACKGROUND ANISOTROPIES; HALO
OCCUPATION DISTRIBUTION; 2-POINT CORRELATION-FUNCTION; SCALE POWER
SPECTRUM; ACOUSTIC-OSCILLATIONS; DARK ENERGY
AB We explore the cosmological implications of the clustering wedges, xi(perpendicular to)(s) and xi()(s), of the CMASS Data Release 9 sample of the Sloan Digital Sky Survey III (SDSS-III) Baryon Oscillation Spectroscopic Survey. These clustering wedges are defined by averaging the full two-dimensional correlation function, xi(mu, s), over the ranges 0 < mu < 0.5 and 0.5 < mu < 1, respectively. These measurements allow us to constrain the parameter combinations D-A(z)/r(s)(z(d)) = 9.03 +/- 0.21 and cz/(r(s)(z(d))H(z)) = 12.14 +/- 0.43 at the mean redshift of the sample, z = 0.57. We combine the information from the clustering wedges with recent measurements of cosmic microwave background (CMB), baryon acoustic oscillations and Type Ia supernovae to obtain constraints on the cosmological parameters of the standard Lambda cold dark matter (Lambda CDM) model and a number of potential extensions. The information encoded in the clustering wedges is most useful when the dark energy equation of state is allowed to deviate from its standard Lambda CDM value. The combination of all data sets shows no evidence of a deviation from a constant dark energy equation of state, in which case we find w(DE) = -1.013 +/- 0.064, in complete agreement with a cosmological constant. We explore potential deviations from general relativity (GR) by constraining the growth rate f(z) = d ln D(a)/d ln a, in which case the combination of the CMASS clustering wedges with CMB data implies f(z = 0.57) = 0.719(-0.096)(+0.092), in accordance with the predictions of GR. Our results clearly illustrate the additional constraining power of anisotropic clustering measurements with respect to that of angle-averaged quantities.
C1 [Sanchez, Ariel G.; Montesano, Francesco] Max Planck Inst Extraterr Phys, D-85741 Garching, Germany.
[Kazin, Eyal A.] Swinburne Univ Technol, Ctr Astrophys & Supercomp, Hawthorn, Vic 3122, Australia.
[Kazin, Eyal A.] ARC Ctr Excellence All Sky Astrophys CAASTRO, Hawthorn, Vic 3122, Australia.
[Beutler, Florian; Schlegel, David J.] Univ Calif Berkeley, Lawrence Berkeley Natl Lab, Berkeley, CA 94720 USA.
[Chuang, Chia-Hsun; Prada, Francisco] Univ Autonoma Madrid, UAM CSIC, Inst Fis Teor, E-28049 Madrid, Spain.
[Cuesta, Antonio J.; Padmanabhan, Nikhil] Yale Univ, Dept Phys, New Haven, CT 06520 USA.
[Eisenstein, Daniel J.] Harvard Smithsonian Ctr Astrophys, Cambridge, MA 02138 USA.
[Manera, Marc; Nichol, Robert C.; Percival, Will; Ross, Ashley J.; Tojeiro, Rita; Thomas, Daniel] Univ Portsmouth, Inst Cosmol & Gravitat, Portsmouth PO1 3FX, Hants, England.
[Prada, Francisco] Campus Int Excellence UAM CSIC, E-28049 Madrid, Spain.
[Prada, Francisco] Inst Astrofis Andalucia CSIC, E-18080 Granada, Spain.
[Tinker, Jeremy] NYU, Ctr Cosmol & Particle Phys, New York, NY 10003 USA.
[Weinberg, David H.] Ohio State Univ, Dept Astron, Columbus, OH 43210 USA.
[Weinberg, David H.] Ohio State Univ, CCAPP, Columbus, OH 43210 USA.
[Xu, Xiaoying] Carnegie Mellon Univ, Dept Phys, Pittsburgh, PA 15213 USA.
[Brinkmann, J.] Apache Point Observ, Sunspot, NM 88349 USA.
[Brownstein, Joel R.] Univ Utah, Dept Phys & Astron, Salt Lake City, UT 84112 USA.
[Schneider, Donald P.] Penn State Univ, Dept Astron & Astrophys, University Pk, PA 16802 USA.
[Schneider, Donald P.] Penn State Univ, Inst Gravitat & Cosmos, University Pk, PA 16802 USA.
RP Sanchez, AG (reprint author), Max Planck Inst Extraterr Phys, Postfach 1312,Giessenbachstr, D-85741 Garching, Germany.
EM arielsan@mpe.mpg.de
OI Beutler, Florian/0000-0003-0467-5438; Cuesta Vazquez, Antonio
Jose/0000-0002-4153-9470
FU Transregional Collaborative Research Centre TR33 'The Dark Universe' of
the German Research Foundation (DFG); Australian Research Council Centre
of Excellence for All-sky Astrophysics (CAAS-TRO) [CE110001020]; ICG;
SEPNet; University of Portsmouth; Alfred P. Sloan Foundation; National
Science Foundation; U.S. Department of Energy; University of Arizona;
Brazilian Participation Group; Brookhaven National Laboratory;
University of Cambridge; Carnegie Mellon University; University of
Florida; French Participation Group; German Participation Group; Harvard
University; Instituto de Astrofisica de Canarias; Michigan State/Notre
Dame/JINA Participation Group; Johns Hopkins University; Lawrence
Berkeley National Laboratory; Max Planck Institute for Astrophysics; Max
Planck Institute for Extraterrestrial Physics; New Mexico State
University; New York University; Ohio State University; Pennsylvania
State University; Princeton University; Spanish Participation Group;
University of Tokyo; University of Utah; Vanderbilt University;
University of Virginia; University of Washington; Yale University; NASA
Office of Space Science
FX AGS acknowledges support by the Transregional Collaborative Research
Centre TR33 'The Dark Universe' of the German Research Foundation (DFG).
EK is supported by the Australian Research Council Centre of Excellence
for All-sky Astrophysics (CAAS-TRO), through project number
CE110001020.; Numerical computations for the PTHALOS mocks were done on
the Sciama High Performance Compute (HPC) cluster which is supported by
the ICG, SEPNet and the University of Portsmouth.; Funding for SDSS-III
has been provided by the Alfred P. Sloan Foundation, the Participating
Institutions, the National Science Foundation and the U.S. Department of
Energy.; SDSS-III is managed by the Astrophysical Research Consortium
for the Participating Institutions of the SDSS-III Collaboration
including the University of Arizona, the Brazilian Participation Group,
Brookhaven National Laboratory, University of Cambridge, Carnegie Mellon
University, University of Florida, the French Participation Group, the
German Participation Group, Harvard University, the Instituto de
Astrofisica de Canarias, the Michigan State/Notre Dame/JINA
Participation Group, Johns Hopkins University, Lawrence Berkeley
National Laboratory, Max Planck Institute for Astrophysics, Max Planck
Institute for Extraterrestrial Physics, New Mexico State University, New
York University, Ohio State University, Pennsylvania State University,
University of Portsmouth, Princeton University, the Spanish
Participation Group, University of Tokyo, University of Utah, Vanderbilt
University, University of Virginia, University of Washington and Yale
University.; We acknowledge the use of the Legacy Archive for Microwave
Background Data Analysis (LAMBDA). Support for LAMBDA is provided by the
NASA Office of Space Science.
NR 123
TC 48
Z9 48
U1 0
U2 5
PU OXFORD UNIV PRESS
PI OXFORD
PA GREAT CLARENDON ST, OXFORD OX2 6DP, ENGLAND
SN 0035-8711
EI 1365-2966
J9 MON NOT R ASTRON SOC
JI Mon. Not. Roy. Astron. Soc.
PD AUG
PY 2013
VL 433
IS 2
BP 1202
EP 1222
DI 10.1093/mnras/stt799
PG 21
WC Astronomy & Astrophysics
SC Astronomy & Astrophysics
GA 178QK
UT WOS:000321462300023
ER
PT J
AU Otto, E
Tarasov, M
Grimes, PK
Chekushkin, A
Kuzmin, LS
Yassin, G
AF Otto, Ernst
Tarasov, Mikhail
Grimes, Paul K.
Chekushkin, Artem
Kuzmin, Leonid S.
Yassin, Ghassan
TI Optical response of a titanium-based cold-electron bolometer
SO SUPERCONDUCTOR SCIENCE & TECHNOLOGY
LA English
DT Article
ID TUNNEL-JUNCTIONS
AB We present experimental results on the testing of cold-electron bolometer (CEB) detectors comprised of a thin Ti film absorber and two SIN junctions integrated with a planar antenna. The CEB performance was tested in a He-3 sorption cryostat HELIOX-AC-V at bath temperatures of 280-305 mK. The optical response was measured using the hot/cold load method by flipping a Cu reflector opposite a blackbody surface inside a 3 K shield and using a thermal source with variable temperature. In the first experiment, the detector chip was mounted in an optical sample-holder whose aperture was switched towards or away from a blackbody source changing the incident radiation temperature from 3 K to 270 mK. As a result, we measured the optical response to a 3 K/270 mK radiation temperature change. The measured voltage response value for the detector integrated in a double-dipole antenna was Delta V-out = 120 mu V. This corresponds to a noise equivalent power of NEP = V-n/(dV/dP) = 3.5 x 10(-17) W Hz(-1/2), where dV/dP is the voltage to power response obtained from the incoming power estimation based on the Planck formula.
C1 [Otto, Ernst; Grimes, Paul K.; Yassin, Ghassan] Univ Oxford, Dept Phys, Oxford, England.
[Otto, Ernst; Tarasov, Mikhail; Chekushkin, Artem; Kuzmin, Leonid S.] Chalmers, S-41296 Gothenburg, Sweden.
[Tarasov, Mikhail; Chekushkin, Artem] Russian Acad Sci, Kotelnikov Inst Radio Engn & Elect, Moscow, Russia.
[Grimes, Paul K.] Smithsonian Astrophys Observ, Cambridge, MA USA.
RP Otto, E (reprint author), Univ Oxford, Dept Phys, Oxford, England.
EM otto.mc2@gmail.com
RI Tarasov, Mikhail/B-2221-2014; Kuzmin, Leonid/M-5153-2016
OI Tarasov, Mikhail/0000-0002-8330-9163;
FU New College, Oxford; Physics Department of Oxford University; Swedish
Institute; Swedish Vetenskapsradet; Russian Ministry of Sciences and
Education [11.G34.31.0029]
FX This work was supported in part by a Wykeham Scholarship from New
College, Oxford, the Physics Department of Oxford University, the
Swedish Institute, the Swedish Vetenskapsradet and the Russian Ministry
of Sciences and Education under grant No. 11.G34.31.0029.
NR 12
TC 3
Z9 3
U1 0
U2 15
PU IOP PUBLISHING LTD
PI BRISTOL
PA TEMPLE CIRCUS, TEMPLE WAY, BRISTOL BS1 6BE, ENGLAND
SN 0953-2048
J9 SUPERCOND SCI TECH
JI Supercond. Sci. Technol.
PD AUG
PY 2013
VL 26
IS 8
AR 085020
DI 10.1088/0953-2048/26/8/085020
PG 5
WC Physics, Applied; Physics, Condensed Matter
SC Physics
GA 181ZL
UT WOS:000321709400026
ER
PT J
AU Liu, HP
Hershler, R
Lang, B
Davies, J
AF Liu, Hsiu-Ping
Hershler, Robert
Lang, Brian
Davies, Justin
TI Molecular evidence for cryptic species in a narrowly endemic western
North American springsnail (Pyrgulopsis gilae)
SO CONSERVATION GENETICS
LA English
DT Article
DE Phylogeography; Gastropoda; Springs; Conservation; Cryptic species
ID NYMPHOPHILINE GASTROPODS; HYDROBIIDAE; BASIN
AB Pyrgulopsis gilae is a small springsnail that is narrowly distributed along the forks of the upper Gila River and currently being managed as a threatened and sensitive species by the State of New Mexico and United States Forest Service, respectively. A previous phylogeographic study of this species based on mitochondrial COI sequences delineated substantial divergence between several populations along the lower and upper reaches of the East Fork Gila River. The present study surveyed COI variation among a larger number of populations across the entire geographic range of P. gilae. Three haplotype groupings were delineated that were congruently resolved as clades by a Bayesian analysis. One of the clades was composed of populations along the lower East Fork and mainstem Gila River and corresponds to P. gilae as originally circumscribed. The other two clades were composed of populations along the Middle Fork and upper East Fork Gila River that were recently referred to P. gilae. These three geographically isolated clades do not share any haplotypes, have significant F-ST values, and are differentiated from each other by 3.9-6.3 % sequence divergence. Based on this evidence we suggest that the clades represent distinct species and should be managed as separate conservation units pending taxonomic revision of P. gilae. This study provides additional evidence that geographically disjunct subunits of Pyrgulopsis species often represent distinct monophyletic lineages that may warrant formal taxonomic recognition, and thus underscores the importance of fine-scale conservation genetics studies of these imperiled organisms.
C1 [Liu, Hsiu-Ping; Davies, Justin] Metropolitan State Univ Denver, Dept Biol, Denver, CO 80217 USA.
[Hershler, Robert] Smithsonian Inst, Dept Invertebrate Zool, Washington, DC 20013 USA.
[Lang, Brian] New Mexico Dept Game & Fish, Santa Fe, NM 87507 USA.
RP Hershler, R (reprint author), Smithsonian Inst, Dept Invertebrate Zool, Washington, DC 20013 USA.
EM hershlerr@si.edu
FU New Mexico Department of Game and Fish [10-516-0000-00010]; United
States Fish and Wildlife Service [E-54]
FX We thank Marilyn Myers (USFWS) for providing specimens. This project was
supported, in part, by an award (to RH) from the New Mexico Department
of Game and Fish (Contract #10-516-0000-00010) and Section funding
(Grant E-54) from the United States Fish and Wildlife Service.
NR 32
TC 3
Z9 3
U1 1
U2 10
PU SPRINGER
PI DORDRECHT
PA VAN GODEWIJCKSTRAAT 30, 3311 GZ DORDRECHT, NETHERLANDS
SN 1566-0621
J9 CONSERV GENET
JI Conserv. Genet.
PD AUG
PY 2013
VL 14
IS 4
BP 917
EP 923
DI 10.1007/s10592-013-0483-x
PG 7
WC Biodiversity Conservation; Genetics & Heredity
SC Biodiversity & Conservation; Genetics & Heredity
GA 176CD
UT WOS:000321279900015
ER
PT J
AU Young, CM
Emson, RH
Rice, ME
Tyler, PA
AF Young, Craig M.
Emson, Roland H.
Rice, Mary E.
Tyler, Paul A.
TI A paradoxical mismatch of fecundity and recruitment in deep-sea
opportunists: Cocculinid and pseudococculinid limpets colonizing
vascular plant remains on the Bahamian Slope
SO DEEP-SEA RESEARCH PART II-TOPICAL STUDIES IN OCEANOGRAPHY
LA English
DT Article
DE Deep sea; Reproduction; Gastropoda; Limpets; Recruitment; Bathyal
ID WOOD-BORING BIVALVES; HYDROTHERMAL VENTS; NORTHEAST PACIFIC; RAPID
GROWTH; LARVAL LIFE; DEVELOPMENTAL ARREST; XYLOPHAGA-ATLANTICA;
REPRODUCTION; GASTROPODA; OCEAN
AB Between 1992 and 1994, palm fronds and bundles of fibrous material (rolled door mats of Chinese dragon grass) were deployed by submersible every 3 months at 520 m depth in the Tongue of the Ocean, Bahamas. Substrata were recovered after 3-month and 6-month exposure periods and searched intensively for invertebrate colonists. Recruitment surfaces were colonized during every exposure period by three species of cocculiniform limpets, Cocculina rathbuni, Cocculina emsoni, and Notocrater youngi. At least two species appeared in each season, but the relative numbers varied in a way that may indicate seasonal differences in reproduction. Gonad development could be observed through the transparent shell of C. rathbuni, which attained sexual maturity in less than 3 months and had a maximum instantaneous fecundity of 40 eggs. Growth rates (0.025-0.044 mm/day) were high when scaled to adult body size. We used current-meter data from the deployment site to calculate the fluxes of larvae that would be required to produce the measured levels of recruitment. Observed recruitment would require larval densities of hundreds of thousands to millions of larvae per km(3). Nevertheless, it is remarkable that these snails are able to succeed with an opportunistic strategy given their low fecundity and lecithotrophic development. (C) 2013 Elsevier Ltd. All rights reserved.
C1 [Young, Craig M.] Univ Oregon, Oregon Inst Marine Biol, Charleston, OR 97420 USA.
[Emson, Roland H.] Kings Coll London, Dept Biosci, London WC2R 2LS, England.
[Rice, Mary E.] Smithsonian Marine Stn Ft Pierce, Ft Pierce, FL USA.
[Tyler, Paul A.] Univ Southampton, Natl Oceanog Ctr, Southampton, Hants, England.
RP Young, CM (reprint author), Univ Oregon, Oregon Inst Marine Biol, POB 5389, Charleston, OR 97420 USA.
EM cmyoung@uoregon.edu
FU NSF [OCE-9116560, OCE-0527139, OCE-9633784]
FX This work was supported by NSF grants OCE-9116560, OCE-0527139, and
OCE-9633784. We thank the submersible pilots of the Johnson-Sea-Link
submersibles and the ship captains of R.V. Seward Johnson and R.V. Edwin
Link for years of outstanding logistical support, and an army of
students, postdocs and colleagues who helped sort tiny animals from
recruitment collectors. Jerry Harasewych kindly provided the scanning
electron micrographs in Fig. 1 as well as useful comments on the
manuscript. This is contribution Number 904 from the Smithsonian Marine
Laboratory at Ft. Pierce.
NR 56
TC 5
Z9 5
U1 0
U2 18
PU PERGAMON-ELSEVIER SCIENCE LTD
PI OXFORD
PA THE BOULEVARD, LANGFORD LANE, KIDLINGTON, OXFORD OX5 1GB, ENGLAND
SN 0967-0645
J9 DEEP-SEA RES PT II
JI Deep-Sea Res. Part II-Top. Stud. Oceanogr.
PD AUG
PY 2013
VL 92
SI SI
BP 36
EP 45
DI 10.1016/j.dsr2.2013.01.027
PG 10
WC Oceanography
SC Oceanography
GA 174SZ
UT WOS:000321177000005
ER
PT J
AU Pawson, DL
Pawson, DJ
AF Pawson, David L.
Pawson, Doris J.
TI Bathyal sea urchins of the Bahamas, with notes on covering behavior in
deep sea echinoids (Echinodermata: Echinoidea)
SO DEEP-SEA RESEARCH PART II-TOPICAL STUDIES IN OCEANOGRAPHY
LA English
DT Article
DE Echinodermata; Echinoidea; Bathyal; Covering; Bahamas; Caribbean
ID STRONGYLOCENTROTUS-DROEBACHIENSIS; PARACENTROTUS-LIVIDUS; LIGHT;
ADHESION; SUNLIGHT; LAMARCK
AB In a survey of the bathyal echinoderms of the Bahama Islands region using manned submersibles, approximately 200 species of echinoderms were encountered and documented; 33 species were echinoids, most of them widespread in the general Caribbean area. Three species were found to exhibit covering behavior, the piling of debris on the upper surface of the body. Active covering is common in at least 20 species of shallow-water echinoids, but it has been reliably documented previously only once in deep-sea habitats. Images of covered deep-sea species, and other species of related interest, are provided. Some of the reasons adduced in the past for covering in shallow-water species, such as reduction of incident light intensity, physical camouflage, ballast in turbulent water, protection from desiccation, presumably do not apply in bathyal species. The main reasons for covering in deep, dark, environments are as yet unknown. Some covering behavior in the deep sea may be related to protection of the genital pores, ocular plates, or madreporite. Covering in some deep-sea species may also be merely a tactile reflex action, as some authors have suggested for shallow-water species. Published by Elsevier Ltd.
C1 [Pawson, David L.; Pawson, Doris J.] Smithsonian Inst, Natl Museum Nat Hist, Washington, DC 20013 USA.
RP Pawson, DL (reprint author), Smithsonian Inst, Natl Museum Nat Hist, Washington, DC 20013 USA.
EM pawsond@si.edu
FU National Museum of Natural History's Small Grant Program; Smithsonian
Regents' Fellowship; Smithsonian Marine Station at Fort Pierce; NMNH's
Small Grants program; Harbor Branch Oceanographic Institution, Inc.
FX DLP is most grateful to John E. Miller, Gordon Hendler, and Porter M.
Kier, treasured colleagues and lifelong friends, for the wonderful
experience of field work in many parts of Florida and the Caribbean,
especially the many dives in the Johnson-Sea-Link submersibles. Partial
support for this research was provided by a Smithsonian Regents'
Fellowship, the Smithsonian Marine Station at Fort Pierce, the NMNH's
Small Grants program, and by Harbor Branch Oceanographic Institution,
Inc.; In June 2011, and again in August 2012, we made a total of six
dives at Curacao, in the Curasub, based at Substation Curacao, to depths
of approximately 305 m. These dives were part of the Smithsonian
Institution's Deep Reef Observation Project, organized and led by Dr.
Carole Baldwin (NMNH). We thank Dr. Baldwin, and Mr. Adriaan "Dutch"
Shrier, owner of Substation Curacao, for enabling our participation in
this project. We also thank the National Museum of Natural History's
Small Grant Program for financial support, and Cristina Castillo for
valuable assistance.
NR 58
TC 17
Z9 17
U1 2
U2 18
PU PERGAMON-ELSEVIER SCIENCE LTD
PI OXFORD
PA THE BOULEVARD, LANGFORD LANE, KIDLINGTON, OXFORD OX5 1GB, ENGLAND
SN 0967-0645
J9 DEEP-SEA RES PT II
JI Deep-Sea Res. Part II-Top. Stud. Oceanogr.
PD AUG
PY 2013
VL 92
SI SI
BP 207
EP 213
DI 10.1016/j.dsr2.2013.01.023
PG 7
WC Oceanography
SC Oceanography
GA 174SZ
UT WOS:000321177000024
ER
PT J
AU Renfrew, RB
Kim, D
Perlut, N
Smith, J
Fox, J
Marra, PP
AF Renfrew, Rosalind B.
Kim, Daniel
Perlut, Noah
Smith, Joseph
Fox, James
Marra, Peter P.
TI Phenological matching across hemispheres in a long-distance migratory
bird
SO DIVERSITY AND DISTRIBUTIONS
LA English
DT Article
DE Bobolink; Dolichonyx oryzivorus; geolocators; migration phenology;
migratory connectivity; Normalized Difference Vegetation Index
ID WARBLER WILSONIA-PUSILLA; SWALLOW HIRUNDO-RUSTICA; GOOSE
BRANTA-LEUCOPSIS; WEST-AFRICAN RAINFALL; EAGLE AQUILA-POMARINA; SPRING
ARRIVAL DATE; NEOTROPICAL MIGRANT; DOLICHONYX-ORYZIVORUS; ECOLOGICAL
CONDITIONS; SOUTH-AMERICA
AB Aim In the Northern Hemisphere, bird migration from the tropic to the temperate zone in spring is thought to proceed at a rate determined in large part by local phenology. In contrast, little is understood about where birds go or the factors that determine why they move or where they stop during the post-breeding period.
Location Study sites were in Oregon, Nebraska and Vermont, and location data we collected extend south to Argentina.
Methods We deployed light-level geolocators on individual Bobolinks from three populations across the breeding range and compare their southbound movement phenology to austral greening as indicated by the Normalized Difference Vegetation Index.
Results Bobolinks from all breeding populations synchronously arrived and remained for up to several weeks in two sequential, small non-breeding areas that were separated by thousands of kilometres, before staging for pre-alternate moult. Similar to the migration patterns of birds to northern breeding areas, movements into the Southern Hemisphere corresponded to increasing primary productivity.
Main conclusions Our findings suggest that the Bobolink's southbound migration is broadly constrained by resource availability, and its non-breeding distribution has been shaped by the seasonal phenology of grasslands in both time and space. This is the first documentation of individual birds from across a continental breeding range exhibiting phenological matching during their post-breeding southward migration. Known conservation threats overlap temporally and spatially with large concentrations of Bobolinks, and should be closely examined. We emphasize the need to consider how individuals move and interact with their environment throughout their annual cycle and over hemispheric scales.
C1 [Renfrew, Rosalind B.] Vermont Ctr Ecostudies, Norwich, VT 05055 USA.
[Kim, Daniel] Platte River Whooping Crane Trust, Wood River, NE 68883 USA.
[Perlut, Noah] Univ New England, Dept Environm Studies, Biddeford, ME 04005 USA.
[Smith, Joseph] Nature Conservancy, New Jersey Chapter, Delmont, NJ 08314 USA.
[Fox, James] British Antarctic Survey, Nat Environm Res Council, Cambridge CB3 0ET, England.
[Marra, Peter P.] Smithsonian Conservat Biol Inst, Migratory Bird Ctr, Natl Zool Pk, Washington, DC 20008 USA.
RP Renfrew, RB (reprint author), Vermont Ctr Ecostudies, POB 420, Norwich, VT 05055 USA.
EM rrenfrew@vtecostudies.org
FU Charles Blake Fund of the Nuttall Ornithological Club
FX This project was made possible by the generous friends of the Vermont
Center for Ecostudies. We gratefully acknowledge the Charles Blake Fund
of the Nuttall Ornithological Club and Terry Precision Cycling for
additional, critical support. In-kind support was provided by the Platte
River Whooping Crane Maintenance Trust, Portland State University, the
Smithsonian Migratory Bird Center, the University of New England, the
University of Vermont and the Galipeau family. Thanks to Joseph Smith,
who generously contributed time and expertise to compile NDVI data.
Thanks to Jim Dastyck and Tim Bodeen of the Malheur National Wildlife
Refuge for access and logistical support. We thank Shelburne Farms for
access to their land. We thank the many dedicated field biologists who
assisted with data collection: Nathan Banet, Lindsay Bauman, Dominique
Bondi, Kristin Cattrano, Tina Centofante, Chris Chutter, Julie Coffey,
Hannah Davies, Katie Dunbar, Lindsay Ferrotte, Ryan Fox, Becca Gordon,
Tom Lawrence, Chris Mulvey, Michael Murphy, Louis Ramirez, Luke Redmond,
Jessica Rempel, Barb Roscoe, Travis Rusch, Joel Thielen, Dacia Wiitala
and Heather Wills.
NR 81
TC 20
Z9 20
U1 6
U2 94
PU WILEY-BLACKWELL
PI HOBOKEN
PA 111 RIVER ST, HOBOKEN 07030-5774, NJ USA
SN 1366-9516
EI 1472-4642
J9 DIVERS DISTRIB
JI Divers. Distrib.
PD AUG
PY 2013
VL 19
IS 8
BP 1008
EP 1019
DI 10.1111/ddi.12080
PG 12
WC Biodiversity Conservation; Ecology
SC Biodiversity & Conservation; Environmental Sciences & Ecology
GA 178JV
UT WOS:000321444900013
ER
PT J
AU Prado-Oviedo, NA
Malloy, EJ
Deng, XY
Brown, JL
AF Prado-Oviedo, Natalia A.
Malloy, Elizabeth J.
Deng, Xinyi
Brown, Janine L.
TI Hyperprolactinemia is not associated with hyperestrogenism in noncycling
African elephants (Loxodonta africana)
SO GENERAL AND COMPARATIVE ENDOCRINOLOGY
LA English
DT Article
DE Hyperestrogenism; Ovarian cyclicity; Estrogen; Prolactin; Pituitary;
Progestagens
ID RAT PITUITARY TISSUES; ASIAN ELEPHANT; PROLACTIN SECRETION;
LUTEINIZING-HORMONE; CYCLICITY STATUS; SERUM PROLACTIN; MESSENGER-RNA;
NORTH-AMERICA; ESTROUS-CYCLE; TUMOR CELLS
AB African elephants in US zoos are not reproducing at replacement levels. This is in part due to physiological problems, one of which is abnormal ovarian cyclicity that has been linked to increased prolactin secretion (hyperprolactinemia). A relationship between increased estrogen production (hyperestrogenism) and hyperprolactinemia has been found in other species. Therefore, the objective of this study was to determine if elevated prolactin was associated with increased estrogen concentrations in non-cycling African elephants. In cycling elephants (n = 12), prolactin secretion followed a normal cyclic pattern, with higher concentrations observed during the follicular phase; overall mean concentration was similar to 18 ng/ml and baseline prolactin was similar to 6 ng/ml. Non-cycling females (n = 18) were categorized into three groups: (1) low prolactin (<15 ng/ml; n = 3); (2) moderate hyperprolactinemia (16-30 ng/ml; n = 7); and marked hyperprolactinemia (>31 ng/ml; n = 8). Mean urinary estrogen conjugate concentrations ranged from 5.4 to 41.4 ng/mg Crt, and were similar between normal cycling (15.4 +/- 1.5 ng/mg Crt) and non-cycling, low prolactin elephants (18.4 +/- 7.3 ng/mg Crt), but were lower in moderate (9.4 +/- 1.3 ng/mg Crt) and marked hyperprolactinemic (9.8 +/- 1.1 ng/mg Crt) groups (P < 0.05). In conclusion, African elephants appear to be sensitive to alterations in prolactin production, with both low (e.g., a non-cycling pattern) and high prolactin secretion being associated with abnormal ovarian activity. However, hyperestrogenism was not related to hyperprolactinemia in the non-cycling females. (C) 2013 Elsevier Inc. All rights reserved.
C1 [Prado-Oviedo, Natalia A.] George Mason Univ, Dept Environm Sci & Publ Policy, Fairfax, VA 22030 USA.
[Prado-Oviedo, Natalia A.; Brown, Janine L.] Smithsonian Conservat Biol Inst, Ctr Species Survival, Front Royal, VA 22630 USA.
[Malloy, Elizabeth J.] American Univ, Dept Math & Stat, Washington, DC 20016 USA.
[Deng, Xinyi] Boston Univ, Dept Math & Stat, Boston, MA 02215 USA.
RP Prado-Oviedo, NA (reprint author), George Mason Univ, Dept Environm Sci & Publ Policy, 4400 Univ Dr, Fairfax, VA 22030 USA.
EM npradoov@gmu.edu
FU Morris Animal Foundation [D08ZO-069]; Ella F. Helmlinge Biology
Fellowship at American University
FX We gratefully acknowledge all the participating institutions for
diligently providing urine and serum samples for this study: Caldwell
Zoo, Hogle Zoo, Indianapolis Zoo, Jacksonville Zoo, Lee Richardson Zoo,
Lion Country Safari, Miami Metro. Zoo, Nashville Zoo, Riverbanks Zoos,
Seneca Park Zoo, and Virginia Zoo. Special thanks to Nicole Parker,
Nicole Presley and Sarah Putman of the SCBI Endocrine Laboratory for
technical assistance; and to Coralie Munro at UC Davis for providing
antibody (EC) and technical assistance. We thank Dr. Al Parlow and the
National Hormone and Pituitary Program (Rockville, MD) for providing
prolactin standard and antiserum; along with Siemens Medical Solutions
Diagnostics (Los Angeles, CA) for in-kind support of serum progesterone
kits. We thank the anonymous reviewers for their constrictive criticism
of this manuscript. This project was supported by grants from the Morris
Animal Foundation (Grant ID#: D08ZO-069), and the Ella F. Helmlinge
Biology Fellowship at American University.
NR 74
TC 4
Z9 4
U1 2
U2 12
PU ACADEMIC PRESS INC ELSEVIER SCIENCE
PI SAN DIEGO
PA 525 B ST, STE 1900, SAN DIEGO, CA 92101-4495 USA
SN 0016-6480
J9 GEN COMP ENDOCR
JI Gen. Comp. Endocrinol.
PD AUG 1
PY 2013
VL 189
BP 7
EP 14
DI 10.1016/j.ygcen.2013.03.035
PG 8
WC Endocrinology & Metabolism
SC Endocrinology & Metabolism
GA 175LF
UT WOS:000321231500002
PM 23623777
ER
PT J
AU Tirelli, T
Gamba, M
Pessani, D
Tudge, CC
AF Tirelli, Tina
Gamba, Marco
Pessani, Daniela
Tudge, Christopher C.
TI Spermatophore and spermatozoal ultrastructure of the Mediterranean
hermit crab Pagurus excavatus (Paguridae: Anomura: Decapoda)
SO JOURNAL OF THE MARINE BIOLOGICAL ASSOCIATION OF THE UNITED KINGDOM
LA English
DT Article
DE morphology; description; reproductive products; Crustacea; Decapoda
ID MALE REPRODUCTIVE-SYSTEM; SOUTHWESTERN-ATLANTIC; SPERM TRANSFER;
CRUSTACEA; PAGUROIDEA; MORPHOLOGY; DIOGENIDAE; FAMILIES; PHYLOGENY;
GONOPORE
AB The ultrastructure of the spermatophores and spermatozoa of the Mediterranean hermit crab Pagurus excavatus are described, using transmission electron microscopy. The size of the different parts of the spermatophore and spermatozoa are given and their ultrastructure described and compared to similar data already present in the literature for other hermit crabs. The morphology and ultrastructure of the spermatophore and spermatozoa of P. excavatus are species-specific, clearly distinguishing the species from the others already described. The spermatophore and spermatozoa show some similarities with those produced by other representatives of the genus. In particular, the tripartite spermatophore is divided into two halves by the lateral ridge and, as with the spermatophores produced by other species belonging to the genus Pagurus, it is morphologically very different from any other Paguroidea. The spermatozoa are composed of an ovoidal acrosomal vesicle capped by the operculum; the acrosome has a length: width ratio of approximately 1.75, therefore larger than 1 as reported for all anomurans studied to date. At the base of the acrosomal vesicle, there is the thin cytoplasm, the large nucleus and three arms positioned to form a 120 degrees angle between each other. The present description is an important additional step allowing for better understanding of the relationships among the different hermit crab taxa.
C1 [Tirelli, Tina; Gamba, Marco; Pessani, Daniela] Univ Turin, Life Sci & Syst Biol Dept, I-10123 Turin, Italy.
[Tudge, Christopher C.] American Univ, Dept Biol, Washington, DC 20016 USA.
[Tudge, Christopher C.] Smithsonian Inst, Natl Museum Nat Hist, Dept Invertebrate Zool, Washington, DC 20013 USA.
RP Tirelli, T (reprint author), Univ Turin, Life Sci & Syst Biol Dept, Via Accademia Albertina 13, I-10123 Turin, Italy.
EM santina.tirelli@unito.it
RI Gamba, Marco/I-1184-2012
OI Gamba, Marco/0000-0001-9545-2242
NR 62
TC 0
Z9 0
U1 0
U2 6
PU CAMBRIDGE UNIV PRESS
PI NEW YORK
PA 32 AVENUE OF THE AMERICAS, NEW YORK, NY 10013-2473 USA
SN 0025-3154
J9 J MAR BIOL ASSOC UK
JI J. Mar. Biol. Assoc. U.K.
PD AUG
PY 2013
VL 93
IS 5
BP 1363
EP 1371
DI 10.1017/S0025315412001877
PG 9
WC Marine & Freshwater Biology
SC Marine & Freshwater Biology
GA 179HI
UT WOS:000321510200018
ER
PT J
AU Fronhofer, EA
Sperr, EB
Kreis, A
Ayasse, M
Poethke, HJ
Tschapka, M
AF Fronhofer, Emanuel A.
Sperr, Ellen B.
Kreis, Anna
Ayasse, Manfred
Poethke, Hans Joachim
Tschapka, Marco
TI Picky hitch-hikers: vector choice leads to directed dispersal and
fat-tailed kernels in a passively dispersing mite
SO OIKOS
LA English
DT Article
ID CALYPTROGYNE-GHIESBREGHTIANA ARECACEAE; LONG-DISTANCE DISPERSAL; FOREST
UNDERSTORY PALM; SEED DISPERSAL; HABITAT PERSISTENCE; REDUCED DISPERSAL;
POLLINATING BATS; FRUIT INITIATION; COSTA-RICA; EVOLUTION
AB Dispersal is a central life-history trait for most animals and plants: it allows to colonize new habitats, escape from competition or avoid inbreeding. Yet, not all species are mobile enough to perform sufficient dispersal. Such passive dispersers may use more mobile animals as dispersal vectors. If multiple potential vectors are available, an active choice can allow to optimize the dispersal process and to determine the distribution of dispersal distances, i.e. an optimal dispersal kernel. We explore dispersal and vector choice in the neotropical flower mite Spadiseius calyptrogynae using a dual approach which combines experiments with an individual-based simulation model. Spadiseius calyptrogynae is found in lowland rainforests in Costa Rica. It inhabits inflorescences of the understorey palm Calyptrogyne ghiesbreghtiana and is phoretic on a number of flower visitors including bats, beetles and stingless bees. We hypothesised that the mites should optimise their dispersal kernel by actively choosing a specific mix of potential phoretic vectors. In a simple olfactometer setup we showed that the flower mites do indeed discriminate between potential vectors. Subsequently we used an individual-based model to analyse the evolutionary forces responsible for the observed patterns of vector choice. The mites combine vectors exhibiting long-distance dispersal with those allowing for more localized dispersal. This results in a fat-tailed dispersal kernel that guarantees the occasional colonization of new host plant patches (long distance) while optimizing the exploitation of clumped resources (local dispersal). Additionally, kin competition results in a preference for small vectors that transport only few individuals at a time. At the same time, these vectors lead to directed dispersal towards suitable habitat, which increases the stability of this very specialized interaction. Our findings can be applied to other phoretic systems but also to vector-based seed dispersal, for example.
C1 [Fronhofer, Emanuel A.; Kreis, Anna; Poethke, Hans Joachim] Univ Wurzburg, Field Stn Fabrikschleichach, DE-96181 Rauhenebrach, Germany.
[Sperr, Ellen B.; Ayasse, Manfred; Tschapka, Marco] Univ Ulm, Inst Expt Ecol, DE-89069 Ulm, Germany.
[Tschapka, Marco] Smithsonian Trop Res Inst, Balboa Ancon, Panama.
RP Fronhofer, EA (reprint author), Univ Wurzburg, Field Stn Fabrikschleichach, Glashuttenstr 5, DE-96181 Rauhenebrach, Germany.
EM fronhofer@biozentrum.uni-wuerzburg.de
RI Fronhofer, Emanuel/J-9784-2013
OI Fronhofer, Emanuel/0000-0002-2219-784X
FU German Excellence Initiative; German Academic Exchange Service (DAAD);
German Science Foundation [DFG: TS 81/2-1]
FX The authors would like to thank Dries Bonte for very helpful comments.
Furthermore, we thank Daniel Lewanzik for help with handling the bats,
Javier Guevara for kindly issuing the research permits (064-2012-SINAC),
OTS and the whole La Selva team for invaluable help and support. EAF was
supported by a grant of the German Excellence Initiative to the Graduate
School of Life Sciences, University of Wurzburg. AK thanks the German
Academic Exchange Service (DAAD) for funding. EBS and MT were supported
by the German Science Foundation (DFG: TS 81/2-1).
NR 61
TC 9
Z9 9
U1 5
U2 52
PU WILEY-BLACKWELL
PI HOBOKEN
PA 111 RIVER ST, HOBOKEN 07030-5774, NJ USA
SN 0030-1299
EI 1600-0706
J9 OIKOS
JI Oikos
PD AUG
PY 2013
VL 122
IS 8
BP 1254
EP 1264
DI 10.1111/j.1600-0706.2013.00503.x
PG 11
WC Ecology
SC Environmental Sciences & Ecology
GA 183NP
UT WOS:000321823300015
ER
PT J
AU Legates, DR
Soon, W
Briggs, WM
AF Legates, David R.
Soon, Willie
Briggs, William M.
TI Learning and Teaching Climate Science: The Perils of Consensus Knowledge
Using Agnotology
SO SCIENCE & EDUCATION
LA English
DT Article
ID GREENHOUSE
AB Agnotology has been defined in a variety of ways including "the study of ignorance and its cultural production" and "the study of how and why ignorance or misunderstanding exists." More recently, however, it has been posited that agnotology should be used in the teaching of climate change science. But rather than use agnotology to enhance an understanding of the complicated nature of the complex Earth's climate, the particular aim is to dispel alternative viewpoints to the so-called consensus science. One-sided presentations of controversial topics have little place in the classroom as they serve only to stifle debate and do not further knowledge and enhance critical thinking. Students must understand not just what is known and why it is known to be true but also what remains unknown and where the limitations on scientific understanding lie. Fact recitation coupled with demonizing any position or person who disagrees with a singularly-derived conclusion has no place in education. Instead, all sides must be covered in highly debatable and important topics such as climate change, because authoritarian science never will have all the answers to such complex problems.
C1 [Legates, David R.] Univ Delaware, Dept Geog, Newark, DE 19716 USA.
[Soon, Willie] Harvard Smithsonian Ctr Astrophys, Cambridge, MA 02138 USA.
RP Legates, DR (reprint author), Univ Delaware, Dept Geog, Newark, DE 19716 USA.
EM legates@udel.edu
NR 20
TC 3
Z9 3
U1 3
U2 38
PU SPRINGER
PI DORDRECHT
PA VAN GODEWIJCKSTRAAT 30, 3311 GZ DORDRECHT, NETHERLANDS
SN 0926-7220
J9 SCI EDUC-NETHERLANDS
JI Sci. Educ.
PD AUG
PY 2013
VL 22
IS 8
BP 2007
EP 2017
DI 10.1007/s11191-013-9588-3
PG 11
WC Education & Educational Research; History & Philosophy Of Science
SC Education & Educational Research; History & Philosophy of Science
GA 180DD
UT WOS:000321572300006
ER
PT J
AU Allendorf, TD
Allendorf, K
AF Allendorf, Teri D.
Allendorf, Keera
TI Gender and Attitudes toward Protected Areas in Myanmar
SO SOCIETY & NATURAL RESOURCES
LA English
DT Article
DE attitudes; gender; Myanmar; park-people relationships; perceptions;
protected areas
ID CHATTHIN WILDLIFE SANCTUARY; NATIONAL-PARK; LOCAL PEOPLE; CONSERVATION
ATTITUDES; COMMUNITY ATTITUDES; BIOSPHERE-RESERVE; FOREST RESOURCES;
PERCEPTIONS; INDIA; MANAGEMENT
AB From grassroots conservation projects to international committees on the environment, women's representation is an important component of a fair, inclusive, and effective conservation process. In this article, we focus on gender differences in local residents' attitudes toward protected areas in Myanmar. We found women are less likely to have a positive attitude toward the protected areas and are less likely to express perceptions of problems and benefits associated with the areas than men. Using decomposition analysis, we find that the majority of the difference between men's and women's attitudes is explained by these differences in perceptions. Further, much of the difference is explained by men being more likely to perceive conservation and ecosystem service benefits than women, which is the most influential determinant of attitude.
C1 [Allendorf, Teri D.] Univ Wisconsin, Dept Forest & Wildlife Ecol, Madison, WI USA.
[Allendorf, Teri D.] Natl Zool Pk, Conservat Ecol Ctr, Smithsonian Conservat Biol Inst, Front Royal, VA USA.
[Allendorf, Keera] Univ Illinois, Dept Sociol, Champaign, IL USA.
RP Allendorf, TD (reprint author), 110 Elm St, Mazomanie, WI 53560 USA.
EM teriallendorf@yahoo.com
OI Allendorf, Keera/0000-0002-4346-6121
NR 45
TC 8
Z9 8
U1 2
U2 17
PU TAYLOR & FRANCIS INC
PI PHILADELPHIA
PA 325 CHESTNUT ST, SUITE 800, PHILADELPHIA, PA 19106 USA
SN 0894-1920
J9 SOC NATUR RESOUR
JI Soc. Nat. Resour.
PD AUG 1
PY 2013
VL 26
IS 8
BP 962
EP 976
DI 10.1080/08941920.2012.729295
PG 15
WC Environmental Studies; Planning & Development; Sociology
SC Environmental Sciences & Ecology; Public Administration; Sociology
GA 176RH
UT WOS:000321321300007
ER
PT J
AU Stenning, DC
Lee, TCM
van Dyk, DA
Kashyap, V
Sandell, J
Young, CA
AF Stenning, David C.
Lee, Thomas C. M.
van Dyk, David A.
Kashyap, Vinay
Sandell, Julia
Young, C. Alex
TI Morphological Feature Extraction for Statistical Learning With
Applications To Solar Image Data
SO STATISTICAL ANALYSIS AND DATA MINING
LA English
DT Article
DE mathematical morphology; image analysis; classification; sunspots;
coronal loops; skeletonization
AB Many areas of science are generating large volumes of digital image data. In order to take full advantage of the high-resolution and high-cadence images modern technology is producing, methods to automatically process and analyze large batches of such images are needed. This involves reducing complex images to simple representations such as binary sketches or numerical summaries that capture embedded scientific information. Using techniques derived from mathematical morphology, we demonstrate how to reduce solar images into simple 'sketch' representations and numerical summaries that can be used for statistical learning. We demonstrate our general techniques on two specific examples: classifying sunspot groups and recognizing coronal loop structures. Our methodology reproduces manual classifications at an overall rate of 90% on a set of 119 magnetogram and white light images of sunspot groups. We also show that our methodology is competitive with other automated algorithms at producing coronal loop tracings and demonstrate robustness through noise simulations. (C) 2013 Wiley Periodicals, Inc.
C1 [Stenning, David C.] Univ Calif Irvine, Dept Stat, Irvine, CA 92617 USA.
[Lee, Thomas C. M.] Univ Calif Davis, Dept Stat, Davis, CA 95616 USA.
[van Dyk, David A.] Univ London Imperial Coll Sci Technol & Med, Dept Math, Stat Sect, London SW7 2AZ, England.
[Kashyap, Vinay] Smithsonian Astrophys Observ, Div High Energy Astrophys, Cambridge, MA 02138 USA.
[Sandell, Julia] Univ Penn, Dept Phys, Philadelphia, PA 19104 USA.
[Young, C. Alex] NASA GSFC, Heliophys Sci Div, Greenbelt, MD 20771 USA.
RP van Dyk, DA (reprint author), Univ London Imperial Coll Sci Technol & Med, Dept Math, Stat Sect, Huxley Bldg, London SW7 2AZ, England.
EM dvandyk@imperial.ac.uk
NR 15
TC 5
Z9 5
U1 0
U2 2
PU WILEY-BLACKWELL
PI HOBOKEN
PA 111 RIVER ST, HOBOKEN 07030-5774, NJ USA
SN 1932-1864
EI 1932-1872
J9 STAT ANAL DATA MIN
JI Stat. Anal. Data Min.
PD AUG
PY 2013
VL 6
IS 4
SI SI
BP 329
EP 345
DI 10.1002/sam.11200
PG 17
WC Computer Science, Artificial Intelligence; Computer Science,
Interdisciplinary Applications; Statistics & Probability
SC Computer Science; Mathematics
GA V41CX
UT WOS:000209525400006
ER
PT J
AU Shapira, I
Shanas, U
Raubenheimer, D
Knapp, C
Alberts, S
Brunton, D
AF Shapira, Idan
Shanas, Uri
Raubenheimer, David
Knapp, Craig
Alberts, Susan
Brunton, Dianne
TI Laboratory rats as conspecific biocontrol agents for invasive Norway
rats R-norvegicus
SO BIOLOGICAL CONTROL
LA English
DT Article
DE Conspecific attraction; Invasive species; Rattus norvegicus; Biocontrol;
Pest; Management
ID PUBLIC-HEALTH; NEW-ZEALAND; BEHAVIOR; ISLAND; CONSERVATION; WILD;
ERADICATION; SONGBIRDS; DISEASES; RODENTS
AB We tested whether conspecific attraction can be more efficient than food bait for the detection and capture of an invasive, social species, the Norway rat Rattus norvegicus. We compared trapping rates between male and female laboratory rats and food baited controls at four mainland sites with low rat population densities, three recreational sites (Zoos) with an abundance of food in the environment, and in manipulated island rat incursions. Live lures were more efficient than food baits at both the mainland and recreational sites. There were no differences between the attractiveness of lure animals based on gender either of the lure or of the captured animals. In the manipulated rat incursions, where radio collared male rats were released on a rat free island, two animals were caught with female lures, and the third lost its collar and evaded detection. In the current study we advocate that animal behavior can help inform and guide innovative tools for the control and management of invasive species. We show that laboratory rats might be efficient as lures for their wild counterparts. Furthermore, our results emphasize the need for a flexible and varied rat control toolbox. We suggest that the use of laboratory rats should be considered in future control management plans for invasive Norway rats. (c) 2013 Elsevier Inc. All rights reserved.
C1 [Shapira, Idan; Brunton, Dianne] Massey Univ, Ecol & Conservat Grp, Inst Nat Sci, North Shore City 0745, Auckland, New Zealand.
[Shanas, Uri] Univ Haifa, Dept Biol, Fac Nat Sci, Tivon, Israel.
[Raubenheimer, David] Massey Univ, Nutrit Ecol Grp, Inst Nat Sci, North Shore City 0745, Auckland, New Zealand.
[Knapp, Craig] Auckland Zoo, Auckland, New Zealand.
[Alberts, Susan] Smithsonian Natl Zool Pk, Integrated Pest Management Dept, Washington, DC USA.
RP Shapira, I (reprint author), Massey Univ, Ecol & Conservat Grp, Inst Nat Sci, Private Bag 102 904, North Shore City 0745, Auckland, New Zealand.
EM shapiraidan@gmail.com; shanas@research.haifa.a-c.il;
d.raubenheimer@massey.ac.nz; Craig.Knap-p@aucklandcouncil.govt.nz;
AlbertsS@si.edu; d.h.brunton@massey.ac.nz
FU Massey University Research Fund (MURF); AC Research Grant
FX We thank the Department of Conservation (DOC), Auckland Zoo (AZ),
Hamilton Zoo (HZ), Smithsonian National Zoological Park (SNZP),
Shakespeare Open Sanctuary Society (SOSSI), Auckland Council (AC),
Forest and Bird (F&B), P. Stevenson and T. Lawson for permission to
conduct these experiments. Special thanks should go to P. Brown & F.
Buchanan (DOC), S. Burgess & M. Maitland (AC), J. Staniland & A.
Warneford (F&B), I. Fraser & T. Joustra (AZ), S. Kudewe and A. Peterson
(HZ), A. Hiza, G. Ose & B. King (SNZP) and J. Thoresen for significant
administration and field assistance, to A. Petzer from the University of
Auckland for kindly supplying laboratory rats and to Honda Marine (NZ)
for supplying a motorboat for transport to Browns Island. This study was
partly funded by the Massey University Research Fund (MURF) and AC
Research Grant.
NR 65
TC 2
Z9 2
U1 0
U2 29
PU ACADEMIC PRESS INC ELSEVIER SCIENCE
PI SAN DIEGO
PA 525 B ST, STE 1900, SAN DIEGO, CA 92101-4495 USA
SN 1049-9644
J9 BIOL CONTROL
JI Biol. Control
PD AUG
PY 2013
VL 66
IS 2
BP 83
EP 91
DI 10.1016/j.biocontrol.2013.04.003
PG 9
WC Biotechnology & Applied Microbiology; Entomology
SC Biotechnology & Applied Microbiology; Entomology
GA 167WR
UT WOS:000320666600002
ER
PT J
AU Akbari, A
Akbari, M
Hill, RJ
AF Akbari, Amir
Akbari, Mohsen
Hill, Reghan J.
TI Effective thermal conductivity of two-dimensional anisotropic two-phase
media
SO INTERNATIONAL JOURNAL OF HEAT AND MASS TRANSFER
LA English
DT Article
DE Effective thermal conductivity; Porous media; Anisotropy; Analytical
model
ID SPHEROIDAL INCLUSIONS; TRANSPORT-PROPERTIES; ELLIPTIC CYLINDERS;
COMPOSITES; SPHERES; RESISTANCE; ARRAYS; LATTICES
AB The effective thermal conductivity of anisotropic two-phase media is studied. Using Chang's unit cell, a new analytical solution is developed for anisotropic materials based on the self-consistent field concept. The structure comprises randomly distributed aligned elliptical inclusions embedded in a continuous medium. Inclusions have arbitrary aspect ratio and arbitrary orientation relative to the coordinate system of interest. The temperature distribution is solved and averaged in the unit cell to obtain all the components. The model shows correct limiting properties in all its independent variables. In particular, it yields Maxwell's theory in the limit where the inclusion aspect ratio approaches unity. Compact expressions for the components of the effective thermal conductivity are presented. The present model is compared with available expressions for anisotropic systems based on an equivalent inclusion model. To assess the accuracy of these, the closure problem associated with the volume averaging method with periodic boundary condition is numerically solved. The present model agrees well with the result of the periodic unit cell compared with equivalent inclusion based methods, particularly for low aspect ratios and moderate particle volume fractions. This is consistent with Ochoa-Tapia's analysis for isotropic systems that Chang's unit cell can accurately approximate spatially periodic models in a wider range of porosities compared to Maxwell's theory. The present solution can serve as a general 2D model for anisotropic structures with dilute to moderate inclusion concentrations. (c) 2013 Elsevier Ltd. All rights reserved.
C1 [Akbari, Amir; Hill, Reghan J.] McGill Univ, Dept Chem Engn, Montreal, PQ H3A 0C5, Canada.
[Akbari, Mohsen] McGill Univ, Dept Biomed Engn, Montreal, PQ H3A 1A4, Canada.
[Akbari, Mohsen] Harvard Smithsonian Ctr Astrophys, Brigham & Womens Hosp, Sch Med, Ctr Biomed Engn,Dept Med, Cambridge, MA 02139 USA.
[Akbari, Mohsen] MIT, Harvard Mit Div Hlth Sci & Technol, Cambridge, MA 02139 USA.
RP Akbari, A (reprint author), McGill Univ, Dept Chem Engn, Montreal, PQ H3A 0C5, Canada.
EM amir.akbari2@mail.mcgill.ca; mohsen.akbari2@mail.mcgill.ca;
reghan.hill@mcgill.ca
FU Natural Science and Engineering Research Council (NSERC) of Canada;
NSERC
FX A.A. acknowledges financial support of Natural Science and Engineering
Research Council (NSERC) of Canada. M.A. acknowledges an NSERC
postdoctoral fellowship.
NR 38
TC 3
Z9 3
U1 3
U2 31
PU PERGAMON-ELSEVIER SCIENCE LTD
PI OXFORD
PA THE BOULEVARD, LANGFORD LANE, KIDLINGTON, OXFORD OX5 1GB, ENGLAND
SN 0017-9310
J9 INT J HEAT MASS TRAN
JI Int. J. Heat Mass Transf.
PD AUG
PY 2013
VL 63
BP 41
EP 50
DI 10.1016/j.ijheatmasstransfer.2013.03.008
PG 10
WC Thermodynamics; Engineering, Mechanical; Mechanics
SC Thermodynamics; Engineering; Mechanics
GA 162TW
UT WOS:000320289900006
ER
PT J
AU Martinez, A
Di Domenico, M
Jorger, K
Norenburg, J
Worsaae, K
AF Martinez, Alejandro
Di Domenico, Maikon
Joerger, Katharina
Norenburg, Jon
Worsaae, Katrine
TI Description of three new species of Protodrilus (Annelida,
Protodrilidae) from Central America
SO MARINE BIOLOGY RESEARCH
LA English
DT Article
DE Meiofauna; interstitial; scanning electron microscopy; barcoding;
Caribbean
ID INTERSTITIAL POLYCHAETE; SYSTEMATICS; PHYLOGENY; RECONSTRUCTION;
ULTRASTRUCTURE; ARCHIANNELIDA; SEQUENCES; EVOLUTION; PATTERNS; ORGANS
AB Three new species of Protodrilus are described from the shallow Western Atlantic waters of Belize and Panama: P. smithsoni sp. nov., P. draco sp. nov. and P. hochbergi sp. nov. Protodrilus smithsoni sp. nov. resembles P. jagersteni and P. submersus from New Zealand, differing by (i) the presence of a dorsal ciliated area on segments 56 of males, (ii) lateral organs extending only to segment 15 (versus 16) and (iii) the smaller size of body and palps. Protodrilus draco sp. nov. is similar to the European P. hypoleucus and P. helgolandicus, but differs in (i) each pygidial lobe possessing a short cirrus and (ii) the posterior-most lateral organ extending dorsally. Protodrilus hochbergi sp. nov. resembles P. purpureus and P. schneideri from the Eastern Atlantic, but differs in (i) the extension of the salivary glands to segment 15 (versus 6) and (ii) the presence of paired lateral ciliary bands on the prostomium. This first exploration of Protodrilus along the Caribbean coast of Central America revealed five new species (three described here), but not P. corderoi, a species described from Brazil and recorded at Dominica. The findings indicate a putative high diversity of Protodrilus species in the Western Atlantic, comparable to the well-sampled Eastern Atlantic (18 reported species). The close resemblance to described species stresses the importance of detailed morphological studies, preferably including scanning electron microscopy, as well as DNA data, in order to describe and identify species of Protodrilus.
C1 [Martinez, Alejandro; Worsaae, Katrine] Univ Copenhagen, Marine Biol Sect, DK-3000 Helsingor, Denmark.
[Di Domenico, Maikon] Univ Fed Parana, Benth Lab, Ctr Marine Studies, BR-80060000 Curitiba, Parana, Brazil.
[Joerger, Katharina] Bavarian State Collect Zool, Mollusca Dept, Munich, Germany.
[Norenburg, Jon] Smithsonian Inst, Natl Museum Nat Hist, Dept Invertebrate Zool, Washington, DC 20560 USA.
RP Martinez, A (reprint author), Univ Copenhagen, Marine Biol Sect, Strandpromenaden 5, DK-3000 Helsingor, Denmark.
EM amartinez@bio.ku.dk
RI Norenburg, Jon/K-3481-2015; Worsaae, Katrine/L-8739-2014
OI Norenburg, Jon/0000-0001-7776-1527; Worsaae, Katrine/0000-0003-0443-4298
FU Encyclopedia of Life Biodiversity Synthesis Group; Encyclopedia of Life
fellowship; Carlsberg Foundation; Freja fellowship (University of
Copenhagen); Volkswagen Foundation
FX Field efforts were in part supported by a grant from Encyclopedia of
Life Biodiversity Synthesis Group to JLN and Rachel Collin. We are
greatly indebted to Rachel Collin and the rest of the competent staff at
the Bocas Marine Laboratory of the Smithsonian Tropical Research
Institute. We thank all the students and professors who participated at
the surveys at Bocas del Toro, especially Ashleigh Smythe, Rick
Hochberg, Marco Curini-Galletti, Fernando Pardos, Christopher Laumer,
Barbara Eder, Tiago Jose Pereira, Sofia Pyataeva and Kevin Kocot, who
sorted out a lot of material from our samples. We thank Peter Rask
Moller and Daniel I. Gouge for assisting with collecting (often by SCUBA
diving) at Belize and Bocas del Toro. We also thank Prof. Angelika
Brandt, curator of the NT II collection at the Zoologisches Museum of
Hamburg, as well as Kathrin Philipps-Bussau and Petra Wagner, for
facilitating us access to the type material of three species of
Protodrilus. The travelling costs of AM and MDD were partially financed
by an Encyclopedia of Life fellowship. The travel costs of KW and
laboratory work was financed by grants for K. Worsaae from the Carlsberg
Foundation and a Freja fellowship (University of Copenhagen). K. Jorger
received funding by a PhD scholarship from the Volkswagen Foundation.
NR 32
TC 11
Z9 11
U1 0
U2 22
PU TAYLOR & FRANCIS AS
PI OSLO
PA KARL JOHANS GATE 5, NO-0154 OSLO, NORWAY
SN 1745-1000
J9 MAR BIOL RES
JI Mar. Biol. Res.
PD AUG 1
PY 2013
VL 9
IS 7
BP 676
EP 691
DI 10.1080/17451000.2013.765574
PG 16
WC Ecology; Marine & Freshwater Biology
SC Environmental Sciences & Ecology; Marine & Freshwater Biology
GA 130JC
UT WOS:000317909700004
ER
PT J
AU Ticay-Rivas, JR
del Pozo-Banos, M
Eberhard, WG
Alonso, JB
Travieso, CM
AF Ticay-Rivas, Jaime R.
del Pozo-Banos, Marcos
Eberhard, William G.
Alonso, Jesus B.
Travieso, Carlos M.
TI Spider specie identification and verification based on pattern
recognition of it cobweb
SO EXPERT SYSTEMS WITH APPLICATIONS
LA English
DT Article
DE Spider specie recognition; Biometrics on animals; Cobwebs;
Identification/Verification approaches; Pattern recognition; Expert
systems; Artificial intelligence
ID PRINCIPAL COMPONENT ANALYSIS; FEATURE-EXTRACTION; ALGORITHMS; DIVERSITY
AB Biodiversity conservation is a global priority where the study of every type of living form is a fundamental task. Inside the huge number of the planet species, spiders play an important role in almost every habitat: This paper presents a comprehensive study on the reliability of the most used features extractors to face the problem of spider specie recognition by using their cobwebs, both in identification and verification modes. We have applied a preprocessing to the cobwebs images in order to obtain only the valid information and compute the optimal size to reach the highest performance. We have used the principal component analysis (PCA), independent component analysis (ICA), Discrete Cosine Transform (DCT), Wavelet Transform (DWT) and discriminative common vectors as features extractors, and proposed the fusion of several of them to improve the system's performance. Finally, we have used the Least Square Vector Support Machine with radial basis function as a classifier. We have implemented K-Fold and Hold-Out cross-validation techniques in order to obtain reliable results. PCA provided the best performance, reaching a 99.65% +/- 0.21 of success rate in identification mode and 99.98% +/- 0.04 of the area under de Reveicer Operating Characteristic (ROC) curve in verification mode. The best combination of features extractors was PCA, DCT, DWT and ICA, which achieved a 99.96% +/- 0.16 of success rate in identification mode and perfect verification. (C) 2013 Elsevier Ltd. All rights reserved.
C1 [Ticay-Rivas, Jaime R.; del Pozo-Banos, Marcos; Alonso, Jesus B.; Travieso, Carlos M.] Univ Las Palmas Gran Canaria, Inst Technol Dev & Innovat Commun, Signals & Commun Dept, Las Palmas Gran Canaria 35017, Las Palmas, Spain.
[Eberhard, William G.] Univ Costa Rica, Smithsonian Trop Res Inst, San Jose, Costa Rica.
[Eberhard, William G.] Univ Costa Rica, Escuela Biol, San Jose, Costa Rica.
RP Travieso, CM (reprint author), Univ Las Palmas Gran Canaria, Inst Technol Dev & Innovat Commun, Signals & Commun Dept, Campus Univ Tafira, Las Palmas Gran Canaria 35017, Las Palmas, Spain.
EM jrticay@idetic.eu; mpozo@idetic.eu; william.eberhard@gmail.com;
jalonso@dsc.ulpgc.es; ctravieso@dsc.ulpgc.es
RI Alonso, Jesus/N-5977-2014; Travieso-Gonzalez, Carlos M./N-5967-2014; del
Pozo Banos, Marcos/R-8617-2016
OI Alonso, Jesus/0000-0002-7866-585X; Travieso-Gonzalez, Carlos
M./0000-0002-4621-2768; del Pozo Banos, Marcos/0000-0003-1502-389X
FU Spanish Government; Agencia Espanola de Cooperacion Internacional para
el Desarrollo [D/027406/09, D/033858/10, A1/039089/11]
FX This work has been supported by Spanish Government, in particular by
"Agencia Espanola de Cooperacion Internacional para el Desarrollo" under
funds from D/027406/09 for 2010, D/033858/10 for 2011 and A1/039089/11
for 2012.
NR 27
TC 3
Z9 3
U1 0
U2 69
PU PERGAMON-ELSEVIER SCIENCE LTD
PI OXFORD
PA THE BOULEVARD, LANGFORD LANE, KIDLINGTON, OXFORD OX5 1GB, ENGLAND
SN 0957-4174
EI 1873-6793
J9 EXPERT SYST APPL
JI Expert Syst. Appl.
PD AUG
PY 2013
VL 40
IS 10
BP 4213
EP 4225
DI 10.1016/j.eswa.2013.01.024
PG 13
WC Computer Science, Artificial Intelligence; Engineering, Electrical &
Electronic; Operations Research & Management Science
SC Computer Science; Engineering; Operations Research & Management Science
GA 120IB
UT WOS:000317162900039
ER
PT J
AU Marriner, N
Flaux, C
Morhange, C
Stanley, JD
AF Marriner, Nick
Flaux, Clement
Morhange, Christophe
Stanley, Jean-Daniel
TI Tracking Nile Delta Vulnerability to Holocene Change
SO PLOS ONE
LA English
DT Article
ID SEA-LEVEL CHANGES; CLIMATE-CHANGE; MISSISSIPPI DELTA; SEDIMENT; CHINA;
FLUCTUATIONS; SETTLEMENTS; SUBSIDENCE; EVOLUTION; RESPONSES
AB Understanding deltaic resilience in the face of Holocene climate change and human impacts is an important challenge for the earth sciences in characterizing the full range of present and future wetland responses to global warming. Here, we report an 8000-year mass balance record from the Nile Delta to reconstruct when and how this sedimentary basin has responded to past hydrological shifts. In a global Holocene context, the long-term decrease in Nile Delta accretion rates is consistent with insolation-driven changes in the 'monsoon pacemaker', attested throughout the mid-latitude tropics. Following the early to mid-Holocene growth of the Nile's deltaic plain, sediment losses and pronounced erosion are first recorded after similar to 4000 years ago, the corollaries of falling sediment supply and an intensification of anthropogenic impacts from the Pharaonic period onwards. Against the backcloth of the Saharan 'depeopling', reduced river flow underpinned by a weakening of monsoonal precipitation appears to have been particularly conducive to the expansion of human activities on the delta by exposing productive floodplain lands for occupation and irrigation agriculture. The reconstruction suggests that the Nile Delta has a particularly long history of vulnerability to extreme events (e. g. floods and storms) and sea-level rise, although the present sediment-starved system does not have a direct Holocene analogue. This study highlights the importance of the world's deltas as sensitive archives to investigate Holocene geosystem responses to climate change, risks and hazards, and societal interaction.
C1 [Marriner, Nick] Univ Franche Comte, CNRS, Lab Chronoenvironm, F-25030 Besancon, France.
[Marriner, Nick] CNRS, Ctr Rech & Enseignement Geosci Environm, Aix En Provence, France.
[Flaux, Clement; Morhange, Christophe] Univ Aix Marseille, Ctr Rech & Enseignement Geosci Environm, Aix En Provence, France.
[Stanley, Jean-Daniel] Smithsonian Inst, Natl Museum Nat Hist, Geoarchaeol Program, Washington, DC 20560 USA.
RP Marriner, N (reprint author), Univ Franche Comte, CNRS, Lab Chronoenvironm, F-25030 Besancon, France.
EM marriner@cerege.fr
OI Marriner, Nick/0000-0002-7916-6059
FU Agence Nationale de la Recherche [Paleomed: 09-BLAN-0323-01, Geomar:
ANR-12-SENV-0008-03]; Artemis Institut National des Sciences de
l'Univers
FX This research was funded by the Agence Nationale de la Recherche
(Paleomed: 09-BLAN-0323-01 and Geomar: ANR-12-SENV-0008-03) and Artemis
Institut National des Sciences de l'Univers. The funders had no role in
study design, data collection and analysis, decision to publish, or
preparation of the manuscript.
NR 64
TC 7
Z9 7
U1 2
U2 31
PU PUBLIC LIBRARY SCIENCE
PI SAN FRANCISCO
PA 1160 BATTERY STREET, STE 100, SAN FRANCISCO, CA 94111 USA
SN 1932-6203
J9 PLOS ONE
JI PLoS One
PD JUL 29
PY 2013
VL 8
IS 7
AR e69195
DI 10.1371/journal.pone.0069195
PG 9
WC Multidisciplinary Sciences
SC Science & Technology - Other Topics
GA 204MP
UT WOS:000323369700022
PM 23922692
ER
PT J
AU Naoz, S
Narayan, R
AF Naoz, Smadar
Narayan, Ramesh
TI Generation of Primordial Magnetic Fields on Linear Overdensity Scales
SO PHYSICAL REVIEW LETTERS
LA English
DT Article
ID BARYONIC STRUCTURE FORMATION; 21-CM FLUCTUATIONS; THERMAL GENERATION;
EARLY UNIVERSE; STAR-FORMATION; HIGH-REDSHIFT; 1ST GALAXIES; TEV
BLAZARS; SIMULATIONS; PERTURBATIONS
AB Magnetic fields appear to be present in all galaxies and galaxy clusters. Recent measurements indicate that a weak magnetic field may be present even in the smooth low density intergalactic medium. One explanation for these observations is that a seed magnetic field was generated by some unknown mechanism early in the life of the Universe, and was later amplified by various dynamos in nonlinear objects like galaxies and clusters. We show that a primordial magnetic field is expected to be generated in the early Universe on purely linear scales through vorticity induced by scale-dependent temperature fluctuations, or equivalently, a spatially varying speed of sound of the gas. Residual free electrons left over after recombination tap into this vorticity to generate magnetic field via the Biermann battery process. Although the battery operates even in the absence of any relative velocity between dark matter and gas at the time of recombination, the presence of such a relative velocity modifies the predicted spatial power spectrum of the magnetic field. At redshifts of order a few tens, we estimate a root mean square field strength of order 10(-25)-10(-24) G on comoving scales similar to 10 kpc. This field, which is generated purely from linear perturbations, is expected to be amplified significantly after reionization, and to be further boosted by dynamo processes during nonlinear structure formation.
C1 [Naoz, Smadar; Narayan, Ramesh] Harvard Smithsonian Ctr Astrophys, Inst Theory & Computat, Cambridge, MA 02138 USA.
RP Naoz, S (reprint author), Harvard Smithsonian Ctr Astrophys, Inst Theory & Computat, 60 Garden St, Cambridge, MA 02138 USA.
EM snaoz@cfa.harvard.edu
OI Narayan, Ramesh/0000-0002-1919-2730; Naoz, Smadar/0000-0002-9802-9279
FU NASA through an Einstein Postdoctoral Fellowship; Chandra X-ray Center;
NASA [PF2-130096]; NASA Grant [NNX11AE16G]
FX We thank Antoine Bret, Avi Loeb, and Lorenzo Sironi for useful
discussions. We also thank Francesco Miniati and the anonymous referees
for useful comments on the manuscript. S. N. was supported by NASA
through an Einstein Postdoctoral Fellowship awarded by the Chandra X-ray
Center, which is operated by the Smithsonian Astrophysical Observatory
for NASA under Contract No. PF2-130096. R. N. acknowledges partial
support from NASA Grant No. NNX11AE16G.
NR 48
TC 14
Z9 14
U1 0
U2 3
PU AMER PHYSICAL SOC
PI COLLEGE PK
PA ONE PHYSICS ELLIPSE, COLLEGE PK, MD 20740-3844 USA
SN 0031-9007
J9 PHYS REV LETT
JI Phys. Rev. Lett.
PD JUL 29
PY 2013
VL 111
IS 5
AR 051303
DI 10.1103/PhysRevLett.111.051303
PG 5
WC Physics, Multidisciplinary
SC Physics
GA 193RL
UT WOS:000322579100004
PM 23952384
ER
PT J
AU Cooper, MJ
Martin, RV
Livesey, NJ
Degenstein, DA
Walker, KA
AF Cooper, Matthew J.
Martin, Randall V.
Livesey, Nathaniel J.
Degenstein, Doug A.
Walker, Kaley A.
TI Analysis of satellite remote sensing observations of low ozone events in
the tropical upper troposphere and links with convection
SO GEOPHYSICAL RESEARCH LETTERS
LA English
DT Article
DE ozone; convection; ENSO; upper troposphere
ID DEEP CONVECTION; OSCILLATION; CHEMISTRY; SPECTROMETER; CLIMATOLOGY;
VARIABILITY; RETRIEVALS; OSIRIS
AB Satellite observations from three instruments (Microwave Limb Sounder, Optical Spectrograph and Infrared Imaging System, and Atmospheric Chemistry Experiment Fourier Transform Spectrometer) reveal coherent patterns of low ozone events (<20 ppb) in the tropical upper troposphere. Using a chemical transport model (GEOS-Chem), we find that these events result from deep convective processes that rapidly transport air with low ozone concentrations from the marine boundary layer. These events occur with greater frequency over the tropical South Pacific warm pool, which is consistent with ozonesonde observations. The satellite observations indicate spatial shifts in the frequency of low ozone events that we attribute to changes in convection. As the location of the warm pool shifts eastward during El Nino events, the location of the most frequent low ozone events in the satellite record follows. Mapping of low ozone events over time reveals eastward propagating systems resembling the Madden-Julian Oscillation. These observations and analyses strengthen the link between d