REDSHIFT EVOLUTION OF THE DYNAMICAL PROPERTIES OF MASSIVE GALAXIES FROM SDSS-III/BOSS

被引：38

作者：

Beifiori, Alessandra ^{[1
,2
,3
]}

Thomas, Daniel ^{[2
,4
]}

Maraston, Claudia ^{[2
]}

Steele, Oliver ^{[2
]}

Masters, Karen L. ^{[2
,4
]}

Pforr, Janine ^{[2
,5
]}

Saglia, Roberto P. ^{[1
,3
]}

Bender, Ralf ^{[1
,3
]}

Tojeiro, Rita ^{[2
]}

Chen, Yan-Mei ^{[6
,7
]}

Bolton, Adam ^{[8
]}

Brownstein, Joel R. ^{[8
]}

Johansson, Jonas ^{[2
,9
]}

Leauthaud, Alexie ^{[10
]}

Nichol, Robert C. ^{[2
]}

Schneider, Donald P. ^{[11
,12
]}

Senger, Robert ^{[1
]}

Skibba, Ramin ^{[13
]}

Wake, David ^{[6
,14
]}

Pan, Kaike ^{[15
]}

Snedden, Stephanie ^{[15
]}

Bizyaev, Dmitry ^{[15
]}

Brewington, Howard ^{[15
]}

Malanushenko, Viktor ^{[15
]}

Malanushenko, Elena ^{[15
]}

Oravetz, Daniel ^{[15
]}

Simmons, Audrey ^{[15
]}

Shelden, Alaina ^{[15
]}

Ebelke, Garrett ^{[15
]}

机构：

[1] Max Planck Inst Extraterr Phys, D-85748 Garching, Germany

[2] Univ Portsmouth, Inst Cosmol & Gravitat, Portsmouth PO1 3FX, Hants, England

[3] Univ Sternwarte, D-81679 Munich, Germany

[4] South East Phys Network, SEPNET, Tucson, AZ 85719 USA

[5] Natl Opt Astron Observ, Tucson, AZ 85719 USA

[6] Univ Wisconsin, Dept Astron, Madison, WI 53706 USA

[7] Nanjing Univ, Dept Astron, Nanjing 210093, Jiangsu, Peoples R China

[8] Univ Utah, Dept Phys & Astron, Salt Lake City, UT 84112 USA

[9] Max Planck Inst Astrophys, D-85748 Garching, Germany

[10] Univ Tokyo, Inst Phys & Math Universe, Chiba 2778582, Japan

[11] Penn State Univ, Dept Astron & Astrophys, University Pk, PA 16802 USA

[12] Penn State Univ, Inst Gravitat & Cosmos, University Pk, PA 16802 USA

[13] Univ Calif San Diego, Ctr Astrophys & Space Sci, Dept Phys, San Diego, CA 92093 USA

[14] Open Univ, Dept Phys Sci, Milton Keynes MK7 6AA, Bucks, England

[15] Apache Point Observ, Sunspot, NM 88349 USA

来源：

ASTROPHYSICAL JOURNAL | 2014年 / 789卷 / 02期

基金：

美国国家科学基金会; 美国安德鲁·梅隆基金会;

关键词：

galaxies: elliptical and lenticular; cD; galaxies: evolution; galaxies: formation; galaxies: high-redshift; galaxies: kinematics and dynamics; DIGITAL SKY SURVEY; SIMILAR-TO; 2; VELOCITY-DISPERSION EVOLUTION; HUBBLE-SPACE-TELESCOPE; SPECTROSCOPICALLY SELECTED SAMPLE; BRIGHTEST CLUSTER GALAXIES; COMPACT QUIESCENT GALAXIES; DARK-MATTER FRACTIONS; INSIDE-OUT GROWTH; LENS ACS SURVEY;

D O I：

10.1088/0004-637X/789/2/92

中图分类号：

P1 [天文学];

学科分类号：

0704 ;

摘要：

We study the redshift evolution of the dynamical properties of similar to 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-star similar to 2 x 10(11) M-circle dot. 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 >2 sigma 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 similar to 0.7 up to z > 2 as M-dyn/ M-star similar to (1 + z)(-0.30 +/- 0.12), further strengthening the evidence for an increase of M-dyn/ M-star 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.circle dot

引用

页数：24

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