REDSHIFT EVOLUTION OF THE DYNAMICAL PROPERTIES OF MASSIVE GALAXIES FROM SDSS-III/BOSS
REDSHIFT EVOLUTION OF THE DYNAMICAL PROPERTIES OF MASSIVE GALAXIES FROM SDSS-III/BOSS
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SDSS-III/BOSS 大质量星系动态特性的红移演化
DOI:
10.1088/0004-637x/789/2/92
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发表时间:
2014
期刊:
影响因子:
--
通讯作者:
Beifiori A
中科院分区:
文献类型:
--
作者:
Beifiori A
We study the redshift evolution of the dynamical properties of∼ 180, 000 massive galaxies from SDSS-III/BOSS combined with a local early-type galaxy sample from SDSS-II in the redshift range 0.1⩽ z⩽ 0.6. The typical stellar mass of this sample is M⋆∼ 2× 10 11 M☉. We analyze the evolution of the galaxy parameters effective radius, stellar velocity dispersion, and the dynamical to stellar mass ratio with redshift. As the effective radii of BOSS galaxies at these redshifts are not well resolved in the Sloan Digital Sky Survey (SDSS) imaging we calibrate the SDSS size measurements with Hubble Space Telescope/COSMOS photometry for a sub-sample of galaxies. We further apply a correction for progenitor bias to build a sample which consists of a coeval, passively evolving population. Systematic errors due to size correction and the calculation of dynamical mass are assessed through Monte Carlo simulations. At fixed stellar or dynamical mass, we find moderate evolution in galaxy size and stellar velocity dispersion, in agreement with previous studies. We show that this results in a decrease of the dynamical to stellar mass ratio with redshift at> 2σ significance. By combining our sample with high-redshift literature data, we find that this evolution of the dynamical to stellar mass ratio continues beyond z∼ 0.7 up to z> 2 as M dyn/M⋆∼(1+ z)− 0.30±0.12, further strengthening the evidence for an increase of M dyn/M⋆ with cosmic time. This result is in line with recent predictions from galaxy formation simulations based on minor merger driven mass growth, in which the dark matter fraction within the half-light radius increases with cosmic time.
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DOI:
10.1088/0004-6256/144/3/78
发表时间:
2012
期刊:
The Astronomical Journal
影响因子:
--
作者:
G. Wegner;E. Corsini;J. Thomas;R. Saglia;R. Bender;S. Pu
通讯作者:
S. Pu
DOI:
--
发表时间:
2012
期刊:
影响因子:
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作者:
C. Nipoti;T. Treu;A. Leauthaud;K. Bundy;A. Newman;M. Auger
通讯作者:
M. Auger
DOI:
--
发表时间:
2012
期刊:
影响因子:
--
作者:
R. Bezanson;P. V. van Dokkum;J. van de Sande;M. Franx;M. Kriek
通讯作者:
M. Kriek
DOI:
--
发表时间:
2010
期刊:
影响因子:
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作者:
R. Saglia;P. Sánchez;P. Sánchez;Ralf Bender;L. Simard;V. Desai;A. Aragón;B. Milvang;C. Halliday;P. Jablonka;P. Jablonka;S. Noll;B. Poggianti;D. Clowe;G. Lucia;R. Pelló;G. Rudnick;T. Valentinuzzi;S. D. M. White;D. Zaritsky
通讯作者:
D. Zaritsky
DOI:
10.1086/312978
发表时间:
1996
期刊:
The Astrophysical Journal Supplement Series
影响因子:
--
作者:
R. Saglia;E. Bertschinger;G. Baggley;D. Burstein;M. Colless;R. Davies;Robert K. McMahan, Jr.;G. Wegner
通讯作者:
G. Wegner