TY - JOUR
T1 - The DEEP3 Galaxy Redshift Survey
T2 - The impact of environment on the size evolution of massive early-type galaxies at intermediate redshift†
AU - Cooper, Michael C.
AU - Griffith, Roger L.
AU - Newman, Jeffrey A.
AU - Coil, Alison L.
AU - Davis, Marc
AU - Dutton, Aaron A.
AU - Faber, S. M.
AU - Guhathakurta, Puragra
AU - Koo, David C.
AU - Lotz, Jennifer M.
AU - Weiner, Benjamin J.
AU - Willmer, Christopher N.A.
AU - Yan, Renbin
PY - 2012/2
Y1 - 2012/2
N2 - 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 < log 10(M {black star}/h -2M ⊙) < 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 ∼0.5h -1kpc 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.
AB - 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 < log 10(M {black star}/h -2M ⊙) < 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 ∼0.5h -1kpc 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.
KW - Galaxies: evolution
KW - Galaxies: formation
KW - Galaxies: fundamental parameters
KW - Galaxies: high-redshift
KW - Galaxies: statistics
KW - Large-scale structure of Universe
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U2 - 10.1111/j.1365-2966.2011.19938.x
DO - 10.1111/j.1365-2966.2011.19938.x
M3 - Article
AN - SCOPUS:84855577575
VL - 419
SP - 3018
EP - 3027
IS - 4
ER -