PRIMUS: CONSTRAINTS ON STAR FORMATION QUENCHING AND GALAXY MERGING, AND THE EVOLUTION OF THE STELLAR MASS FUNCTION FROM z=0-1

被引：476

作者：

Moustakas, John ^{[1
]}

Coil, Alison L. ^{[2
]}

Aird, James ^{[3
]}

Blanton, Michael R. ^{[4
]}

Cool, Richard J. ^{[5
]}

Eisenstein, Daniel J. ^{[6
]}

Mendez, Alexander J. ^{[2
]}

Wong, Kenneth C. ^{[7
]}

Zhu, Guangtun ^{[8
]}

Arnouts, Stephane ^{[9
,10
]}

机构：

[1] Siena Coll, Dept Phys & Astron, Loudonville, NY 12211 USA

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

[3] Univ Durham, Dept Phys, Durham DH1 3LE, England

[4] NYU, Dept Phys, Ctr Cosmol & Particle Phys, New York, NY 10003 USA

[5] Univ Arizona, MMT Observ, Tucson, AZ 85721 USA

[6] Harvard Smithsonian Ctr Astrophys, Cambridge, MA 02138 USA

[7] Univ Arizona, Steward Observ, Tucson, AZ 85721 USA

[8] Johns Hopkins Univ, Dept Phys & Astron, Baltimore, MD 21218 USA

[9] Canada France Hawaii Telescope Corp, Kamuela, HI 96743 USA

[10] Aix Marseille Univ, CNRS, LAM, UMR 7326, F-13388 Marseille, France

来源：

ASTROPHYSICAL JOURNAL | 2013年 / 767卷 / 01期

基金：

美国国家科学基金会; 美国国家航空航天局;

关键词：

galaxies: evolution; galaxies: high-redshift; large-scale structure of universe; surveys; DIGITAL SKY SURVEY; COLOR-MAGNITUDE DIAGRAM; ASYMPTOTIC GIANT BRANCH; ACTIVE GALACTIC NUCLEI; SIMILAR-TO; OPTICAL LUMINOSITY FUNCTION; EXTRAGALACTIC SURVEY ESIS; SUPERMASSIVE BLACK-HOLES; FRANCE-HAWAII-TELESCOPE; SPITZER-SPACE-TELESCOPE;

D O I：

10.1088/0004-637X/767/1/50

中图分类号：

P1 [天文学];

学科分类号：

0704 ;

摘要：

We measure the evolution of the stellar mass function (SMF) from z = 0-1 using multi-wavelength imaging and spectroscopic redshifts from the PRismMUlti-object Survey (PRIMUS) and the Sloan Digital Sky Survey (SDSS). From PRIMUS we construct an i < 23 flux-limited sample of similar to 40,000 galaxies at z = 0.2-1.0 over five fields totaling approximate to 5.5 deg(2), and from the SDSS we select similar to 170,000 galaxies at z = 0.01-0.2 that we analyze consistently with respect to PRIMUS to minimize systematic errors in our evolutionary measurements. We find that the SMF of all galaxies evolves relatively little since z = 1, although we do find evidence for mass assembly downsizing; we measure a approximate to 30% increase in the number density of similar to 10(10) M-circle dot galaxies since z approximate to 0.6, and a less than or similar to 10% change in the number density of all greater than or similar to 10(11) M-circle dot galaxies since z approximate to 1. Dividing the sample into star-forming and quiescent using an evolving cut in specific star formation rate, we find that the number density of similar to 10(10) M-circle dot star-forming galaxies stays relatively constant since z approximate to 0.6, whereas the space density of greater than or similar to 10(11) M-circle dot star-forming galaxies decreases by similar to 50% between z approximate to 1 and z approximate to 0. Meanwhile, the number density of similar to 10(10) M-circle dot quiescent galaxies increases steeply toward low redshift, by a factor of similar to 2-3 since z approximate to 0.6, while the number of massive quiescent galaxies remains approximately constant since z approximate to 1. These results suggest that the rate at which star-forming galaxies are quenched increases with decreasing stellar mass, but that the bulk of the stellar mass buildup within the quiescent population occurs around similar to 10(10.8) M-circle dot. In addition, we conclude that mergers do not appear to be a dominant channel for the stellar mass buildup of galaxies at z < 1, even among massive (greater than or similar to 10(11) M-circle dot) quiescent galaxies.

引用

页数：34

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