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

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

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 ⊙) = 9.0-11.0, 28 of which are members of a known overdensity at z = 2.095. We measure Hα 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
Journal	Astrophysical Journal Letters
Volume	825
Issue number	1
DOIs	https://doi.org/10.3847/2041-8205/825/1/L2
Publication status	Published - 23 Jun 2016

Keywords

galaxies: evolution

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Alcorn_2016_ApJL_825_L2Final published version, 1.16 MB

https://arxiv.org/abs/1606.00528

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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). https://doi.org/10.3847/2041-8205/825/1/L2

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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 ⊙) = 9.0-11.0, 28 of which are members of a known overdensity at z = 2.095. We measure Hα 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",

year = "2016",

month = jun,

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doi = "10.3847/2041-8205/825/1/L2",

language = "English",

volume = "825",

journal = "Astrophysical Journal Letters",

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TY - JOUR

T1 - ZFIRE: The Kinematics of Star-forming Galaxies as a Function of Environment at z ˜ 2

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 - 2016/6/23

Y1 - 2016/6/23

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 ⊙) = 9.0-11.0, 28 of which are members of a known overdensity at z = 2.095. We measure Hα 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 ⊙) = 9.0-11.0, 28 of which are members of a known overdensity at z = 2.095. We measure Hα 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

U2 - 10.3847/2041-8205/825/1/L2

DO - 10.3847/2041-8205/825/1/L2

M3 - Article

VL - 825

JO - Astrophysical Journal Letters

JF - Astrophysical Journal Letters

SN - 2041-8205

IS - 1

ER -

ZFIRE: The Kinematics of Star-forming Galaxies as a Function of Environment at z ˜ 2

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