ZFIRE: The kinematics of star-forming galaxies as a function of environment at z ∼ 2

Leo Y. Alcorn; Kim Vy H. Tran; Glenn G. Kacprzak; Themiya Nanayakkara; Caroline Straatman; Tiantian Yuan; Rebecca J. Allen; Michael Cowley; Romeel Davé; Karl Glazebrook; Lisa J. Kewley; Ivo Labbé; Ryan Quadri; Lee R. Spitler; Adam Tomczak

doi:10.3847/2041-8205/825/1/L2

ZFIRE: The kinematics of star-forming galaxies as a function of environment at z ∼ 2

Leo Y. Alcorn
, Kim Vy H. Tran
, Glenn G. Kacprzak
, Themiya Nanayakkara
, Caroline Straatman
, Tiantian Yuan
, Rebecca J. Allen
, Michael Cowley
, Romeel Davé
, Karl Glazebrook
, Lisa J. Kewley
, Ivo Labbé
, Ryan Quadri
, Lee R. Spitler
, Adam Tomczak

Steward Observatory

Research output: Contribution to journal › Article › peer-review

15 Scopus citations

Abstract

We perform a kinematic analysis of galaxies at z ∼ 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 _∗/M _o) = 9.0-11.0, 28 of which are members of a known overdensity at z = 2.095. We measure H emission-line integrated velocity dispersions (σ _int) from 50 to 230 km s^-1, consistent with other emission-line studies of z ∼ 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 ∼ 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 ∼ 2 are not significantly different between the cluster and field environments.

Original language	English (US)
Article number	L2
Journal	Astrophysical Journal Letters
Volume	825
Issue number	1
DOIs	https://doi.org/10.3847/2041-8205/825/1/L2
State	Published - Jul 1 2016

Keywords

galaxies: evolution

ASJC Scopus subject areas

Astronomy and Astrophysics
Space and Planetary Science

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10.3847/2041-8205/825/1/L2

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Alcorn, L. Y., Tran, K. V. H., Kacprzak, G. G., Nanayakkara, T., Straatman, C., Yuan, T., Allen, R. J., Cowley, M., Davé, R., Glazebrook, K., Kewley, L. J., Labbé, I., Quadri, R., Spitler, L. R., & Tomczak, A. (2016). ZFIRE: The kinematics of star-forming galaxies as a function of environment at z ∼ 2. Astrophysical Journal Letters, 825(1), Article L2. https://doi.org/10.3847/2041-8205/825/1/L2

Alcorn, LY, Tran, KVH, Kacprzak, GG, Nanayakkara, T, Straatman, C, Yuan, T, Allen, RJ, Cowley, M, Davé, R, Glazebrook, K, Kewley, LJ, Labbé, I, Quadri, R, Spitler, LR & Tomczak, A 2016, 'ZFIRE: The kinematics of star-forming galaxies as a function of environment at z ∼ 2', Astrophysical Journal Letters, vol. 825, no. 1, L2. https://doi.org/10.3847/2041-8205/825/1/L2

@article{17762cc974c549278dad3904dcfa208a,

title = "ZFIRE: The kinematics of star-forming galaxies as a function of environment at z ∼ 2",

abstract = "We perform a kinematic analysis of galaxies at z ∼ 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 ∗/M o) = 9.0-11.0, 28 of which are members of a known overdensity at z = 2.095. We measure H emission-line integrated velocity dispersions (σ int) from 50 to 230 km s-1, consistent with other emission-line studies of z ∼ 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 ∼ 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 ∼ 2 are not significantly different between the cluster and field environments.",

keywords = "galaxies: evolution",

author = "Alcorn, \{Leo Y.\} and Tran, \{Kim Vy H.\} and Kacprzak, \{Glenn G.\} and Themiya Nanayakkara and Caroline Straatman and Tiantian Yuan and Allen, \{Rebecca J.\} and Michael Cowley and Romeel Dav{\'e} and Karl Glazebrook and Kewley, \{Lisa J.\} and Ivo Labb{\'e} and Ryan Quadri and Spitler, \{Lee R.\} and Adam Tomczak",

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AU - Alcorn, Leo Y.

AU - Tran, Kim Vy H.

AU - Kacprzak, Glenn G.

AU - Nanayakkara, Themiya

AU - Straatman, Caroline

AU - Yuan, Tiantian

AU - Allen, Rebecca J.

AU - Cowley, Michael

AU - Davé, Romeel

AU - Glazebrook, Karl

AU - Kewley, Lisa J.

AU - Labbé, Ivo

AU - Quadri, Ryan

AU - Spitler, Lee R.

AU - Tomczak, Adam

PY - 2016/7/1

Y1 - 2016/7/1

N2 - We perform a kinematic analysis of galaxies at z ∼ 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 ∗/M o) = 9.0-11.0, 28 of which are members of a known overdensity at z = 2.095. We measure H emission-line integrated velocity dispersions (σ int) from 50 to 230 km s-1, consistent with other emission-line studies of z ∼ 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 ∼ 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 ∼ 2 are not significantly different between the cluster and field environments.

AB - We perform a kinematic analysis of galaxies at z ∼ 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 ∗/M o) = 9.0-11.0, 28 of which are members of a known overdensity at z = 2.095. We measure H emission-line integrated velocity dispersions (σ int) from 50 to 230 km s-1, consistent with other emission-line studies of z ∼ 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 ∼ 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 ∼ 2 are not significantly different between the cluster and field environments.

KW - galaxies: evolution

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UR - https://www.scopus.com/pages/publications/84978540206#tab=citedBy

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JO - Astrophysical Journal Letters

JF - Astrophysical Journal Letters

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ZFIRE: The kinematics of star-forming galaxies as a function of environment at z ∼ 2

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Keywords

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