Stellar Mass Profiles of Quiescent Galaxies in Different Environments at z ∼ 0

被引：5

作者：

Mosleh, Moein ^{[1
,2
]}

Tavasoli, Saeed ^{[3
]}

Tacchella, Sandro ^{[4
]}

机构：

[1] Shiraz Univ, Biruni Observ, Shiraz 71454, Iran

[2] Shiraz Univ, Dept Phys, Shiraz 71454, Iran

[3] Kharazmi Univ, Fac Phys, Mofateh Ave, Tehran, Iran

[4] Harvard Smithsonian Ctr Astrophys, 60 Garden St, Cambridge, MA 02138 USA

来源：

ASTROPHYSICAL JOURNAL | 2018年 / 861卷 / 02期

基金：

美国国家航空航天局; 美国国家科学基金会;

关键词：

galaxies: clusters; galaxies: evolution; galaxies: groups: general; galaxies: star formation; galaxies: structure; DIGITAL SKY SURVEY; INTEGRAL FIELD SPECTROSCOPY; STAR-FORMATION HISTORIES; PROMINENT NEARBY VOIDS; INSIDE-OUT GROWTH; ELLIPTIC GALAXIES; SIZE EVOLUTION; LOCAL UNIVERSE; BLACK-HOLES; PHOTOMETRIC PROPERTIES;

D O I：

10.3847/1538-4357/aac5e6

中图分类号：

P1 [天文学];

学科分类号：

0704 ;

摘要：

We present the stellar mass profiles of 147 isolated quiescent galaxies in very low-density environments (i.e., void regions) in the local universe (0.01 < z < 0.06) from the Sloan Digital Sky Survey. These galaxies have stellar masses between 9.8 less than or similar to log(M-*/ M-circle dot) less than or similar to 11.2 and they represent similar to 15% of the whole galaxy population in the void regions down to M-r - -19. We do not find any isolated quiescent galaxies with log(M-*/M-circle dot) greater than or similar to 11.2. We compare the stellar mass profiles of these isolated quiescent galaxies with those of the profiles of stellar mass-matched samples of the quiescent galaxies in group and cluster environments. We find that, at a fixed mass, quiescent galaxies in voids have similar central (1 kpc) mass densities (Sigma(1)) and central velocity dispersions (sigma(1)) compared to their counterparts in groups and clusters. We show that quiescent galaxies in voids have at most 10%-25% smaller half-mass (and half-light) sizes compared to quiescent galaxies in groups and clusters. We conclude that for the intermediate stellar mass range of 10(10)-10(11) M-circle dot in the local universe, environmental mechanisms have no significant additional effect on the mass profiles of the quiescent galaxies.

引用

页数：12

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