CANDELS OBSERVATIONS OF THE ENVIRONMENTAL DEPENDENCE OF THE COLOR-MASS-MORPHOLOGY RELATION AT z = 1.6

Journal Article · Mon Jun 10 04:00:00 EDT 2013 · Astrophysical Journal

DOI:https://doi.org/10.1088/0004-637X/770/1/58· OSTI ID:22127112

Bassett, Robert; Papovich, Casey; Tran, Kim-Vy ^[1]; Lotz, Jennifer M.; Ferguson, Henry C.; Koekemoer, Anton M. ^[2]; Bell, Eric F. ^[3]; Finkelstein, Steven L. ^[4]; Newman, Jeffrey A. ^[5]; Almaini, Omar; Lani, Caterina ^[6]; Cooper, Michael ^[7]; Croton, Darren ^[8]; Dekel, Avishai ^[9]; Kocevski, Dale D.; Koo, David C.; McGrath, Elizabeth J. ^[10]; McIntosh, Daniel H. ^[11]; Wechsler, Risa ^[12]

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1. George P. and Cynthia Woods Mitchell Institute for Fundamental Physics and Astronomy, College Station, TX 77843-4242 (United States)
2. Space Telescope Science Institute, 3700 San Martin Dr., Baltimore, MD 21218 (United States)
3. Department of Astronomy, University of Michigan, Ann Arbor, MI 48109 (United States)
4. Department of Astronomy, University of Texas, Austin, TX 78712 (United States)
5. Department of Physics and Astronomy, University of Pittsburgh, Pittsburgh, PA 15260 (United States)
6. School of Physics and Astronomy, University of Nottingham, Nottingham (United Kingdom)
7. Center for Galaxy Evolution, Department of Physics and Astronomy, University of California, Irvine, 4129 Frederick Reines Hall, Irvine, CA 92697 (United States)
8. Centre for Astrophysics and Supercomputing, Swinburne University of Technology, Hawthorn (Australia)
9. Racah Institute of Physics, The Hebrew University, Jerusalem 91904 (Israel)
10. UCO/Lick Observatory, Department of Astronomy and Astrophysics, University of California, Santa Cruz, CA 95064 (United States)
11. Department of Physics, University of Missouri-Kansas City, 5110 Rockhill Road, Kansas City, MO 64110 (United States)
12. Kavli Institute for Particle Astrophysics and Cosmology, Physics Department, and SLAC National Accelerator Laboratory, Stanford University, Stanford, CA 94305 (United States)

We study the environmental dependence of color, stellar mass, and morphology by comparing galaxies in a forming cluster to those in the field at z = 1.6 with Hubble Space Telescope near-infrared imaging in the CANDELS/UDS field. We quantify the morphology of the galaxies using the effective radius, r{sub eff}, and Sersic index, n. In both the cluster and field, approximately half of the bulge-dominated galaxies (n > 2) reside on the red sequence of the color-magnitude diagram, and most disk-dominated galaxies (n < 2) have colors expected for star-forming galaxies. There is weak evidence that cluster galaxies have redder rest-frame U - B colors and higher stellar masses compared to the field. Star-forming galaxies in both the cluster and field show no significant differences in their morphologies. In contrast, there is evidence that quiescent galaxies in the cluster have larger median effective radii and smaller Sersic indices compared to the field with a significance of 2{sigma}. These differences are most pronounced for galaxies at clustercentric distances 1 Mpc

• OSTI ID: 22127112
• Journal Information: Astrophysical Journal, Journal Name: Astrophysical Journal Journal Issue: 1 Vol. 770; ISSN ASJOAB; ISSN 0004-637X
• Country of Publication: United States
• Language: English

Related Subjects

79 ASTRONOMY AND ASTROPHYSICS
APPROXIMATIONS
COLOR MODEL
COMPARATIVE EVALUATIONS
GALACTIC EVOLUTION
GALAXIES
GALAXY CLUSTERS
HUBBLE EFFECT
MASS
MORPHOLOGY
RED SHIFT
STARS
TELESCOPES