ZFIRE: THE KINEMATICS OF STAR-FORMING GALAXIES AS A FUNCTION OF ENVIRONMENT AT z ∼ 2

被引：13

作者：

Alcorn, Leo Y. ^{[1
]}

Tran, Kim-Vy H. ^{[1
]}

Kacprzak, Glenn G. ^{[2
]}

Nanayakkara, Themiya ^{[2
]}

Straatman, Caroline ^{[3
]}

Yuan, Tiantian ^{[4
]}

Allen, Rebecca J. ^{[2
]}

Cowley, Michael ^{[5
,6
]}

Dave, Romeel ^{[7
,8
,9
]}

Glazebrook, Karl ^{[2
]}

Kewley, Lisa J. ^{[4
]}

Labbe, Ivo ^{[3
]}

Quadri, Ryan ^{[1
]}

Spitler, Lee R. ^{[5
,6
]}

Tomczak, Adam ^{[10
]}

机构：

[1] Texas A&M Univ, George P & Cynthia W Mitchell Inst Fundamental Ph, Dept Phys & Astron, College Stn, TX 77843 USA

[2] Swinburne Univ Technol, Hawthorn, Vic 3122, Australia

[3] Leiden Univ, Leiden Observ, POB 9513, NL-2300 RA Leiden, Netherlands

[4] Australian Natl Univ, Res Sch Astron & Astrophys, Cotter Rd, Weston, ACT 2611, Australia

[5] Australian Astron Observ, POB 915, N Ryde, NSW 1670, Australia

[6] Macquarie Univ, Dept Phys & Astron, Fac Sci & Engn, Sydney, NSW 2109, Australia

[7] Univ Western Cape, ZA-7535 Cape Town, South Africa

[8] South African Astron Observ, ZA-7925 Cape Town, South Africa

[9] African Inst Math Sci, ZA-7945 Cape Town, South Africa

[10] Univ Calif Davis, Dept Phys, Davis, CA 95616 USA

来源：

ASTROPHYSICAL JOURNAL LETTERS | 2016年 / 825卷 / 01期

基金：

澳大利亚研究理事会; 美国国家科学基金会;

关键词：

galaxies:; evolution; TULLY-FISHER RELATION; PHYSICAL-PROPERTIES; CLUSTER GALAXIES; FORMATION RATES; MASS; EVOLUTION; STELLAR; CONFIRMATION; SPECTROSCOPY; CANDELS;

D O I：

10.3847/2041-8205/825/1/L2

中图分类号：

P1 [天文学];

学科分类号：

0704 ;

摘要：

We perform a kinematic analysis of galaxies at z similar to 2 in the COSMOS legacy field using near-infrared (NIR) spectroscopy from Keck/MOSFIRE as part of the ZFIRE survey. Our sample consists of 75 Ks-band selected star-forming galaxies from the ZFOURGE survey with stellar masses ranging from log(M-star/M-circle dot) = 9.0-11.0, 28 of which are members of a known overdensity at z = 2.095. We measure Ha emission-line integrated velocity dispersions (sigma(int)) from 50 to 230 km s(-1), consistent with other emission-line studies of z similar to 2 field galaxies. From these data we estimate virial, stellar, and gas masses and derive correlations between these properties for cluster and field galaxies at z similar to 2. We find evidence that baryons dominate within the central effective radius. However, we find no statistically significant differences between the cluster and the field, and conclude that the kinematics of star-forming galaxies at z similar to 2 are not significantly different between the cluster and field environments.

引用

页数：6

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