Some of the data presented herein were obtained at the W.M. Keck Observatory, which is operated as a scientific partnership among the California Institute of Technology, the University of California and the National Aeronautics and Space Administration. The Observatory was made possible by the generous financial support of the W.M. Keck Foundation.
The DEEP3 Galaxy Redshift Survey: the impact of environment on the size evolution of massive early-type galaxies at intermediate redshift
Article first published online: 18 NOV 2011
© 2011 The Authors Monthly Notices of the Royal Astronomical Society © 2011 RAS
Monthly Notices of the Royal Astronomical Society
Volume 419, Issue 4, pages 3018–3027, February 2012
How to Cite
Cooper, M. C., Griffith, R. L., Newman, J. A., Coil, A. L., Davis, M., Dutton, A. A., Faber, S. M., Guhathakurta, P., Koo, D. C., Lotz, J. M., Weiner, B. J., Willmer, C. N. A. and Yan, R. (2012), The DEEP3 Galaxy Redshift Survey: the impact of environment on the size evolution of massive early-type galaxies at intermediate redshift. Monthly Notices of the Royal Astronomical Society, 419: 3018–3027. doi: 10.1111/j.1365-2966.2011.19938.x
Based on observations made with the NASA/ESA Hubble Space Telescope, obtained from the data archive at the Space Telescope Science Institute. STScI is operated by the Association of Universities for Research in Astronomy, Inc. under NASA contract NAS 5-26555.
- Issue published online: 9 JAN 2012
- Article first published online: 18 NOV 2011
- Accepted 2011 October 3. Received 2011 September 25; in original form 2011 August 16
- galaxies: evolution;
- galaxies: formation;
- galaxies: fundamental parameters;
- galaxies: high-redshift;
- galaxies: statistics;
- large-scale structure of Universe
Using data drawn from the DEEP2 and DEEP3 Galaxy Redshift Surveys, we investigate the relationship between the environment and the structure of galaxies residing on the red sequence at intermediate redshift. Within the massive (10 < log10(M★/h−2 M⊙) < 11) early-type population at 0.4 < z < 1.2, we find a significant correlation between local galaxy overdensity (or environment) and galaxy size, such that early-type systems in higher density regions tend to have larger effective radii (by ∼0.5 h−1 kpc or 25 per cent larger) than their counterparts of equal stellar mass and Sérsic index in lower density environments. This observed size–density relation is consistent with a model of galaxy formation in which the evolution of early-type systems at z < 2 is accelerated in high-density environments such as groups and clusters and in which dry, minor mergers (versus mechanisms such as quasar feedback) play a central role in the structural evolution of the massive, early-type galaxy population.