ZFIRE: THE KINEMATICS OF STAR-FORMING GALAXIES AS A FUNCTION OF ENVIRONMENT AT z ∼ 2
- George P. and Cynthia W. Mitchell Institute for Fundamental Physics and Astronomy, Department of Physics and Astronomy, Texas A and M University, College Station, TX 77843 (United States)
- Swinburne University of Technology, Hawthorn, VIC 3122 (Australia)
- Leiden Observatory, Leiden University, P.O. Box 9513, NL 2300 RA Leiden (Netherlands)
- Research School of Astronomy and Astrophysics, The Australian National University, Cotter Road, Weston Creek, ACT 2611 (Australia)
- Australian Astronomical Observatory, P.O. Box 915, North Ryde, NSW 1670 (Australia)
- University of the Western Cape, Bellville, Cape Town, 7535 (South Africa)
- Department of Physics, University of California, Davis, CA, 95616 (United States)
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 {sub ⋆}/ M {sub ⊙}) = 9.0–11.0, 28 of which are members of a known overdensity at z = 2.095. We measure H α emission-line integrated velocity dispersions ( σ {sub int}) from 50 to 230 km s{sup −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.
- OSTI ID:
- 22654285
- Journal Information:
- Astrophysical Journal Letters, Vol. 825, Issue 1; Other Information: Country of input: International Atomic Energy Agency (IAEA); ISSN 2041-8205
- Country of Publication:
- United States
- Language:
- English
Similar Records
ZFIRE: similar stellar growth in hα-emitting cluster and field galaxies at z ∼ 2
ZFIRE: Galaxy cluster kinematics, Hα star formation rates, and gas phase metallicities of XMM-LSS J02182-05102 AT z{sub cl}=1.6233