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Article Dans Une Revue The Astrophysical Journal Année : 2013

CONSTRAINING THE ASSEMBLY OF NORMAL AND COMPACT PASSIVELY EVOLVING GALAXIES FROM REDSHIFT z=3 TO THE PRESENT WITH CANDELS

M. Giavalisco
  • Fonction : Auteur
C. C. Williams
  • Fonction : Auteur
Yicheng Guo
  • Fonction : Auteur
Bomee Lee
  • Fonction : Auteur
A. Renzini
  • Fonction : Auteur
H. Ferguson
  • Fonction : Auteur
S. F. Faber
  • Fonction : Auteur
G. Barro
  • Fonction : Auteur
D. H. Mcintosh
  • Fonction : Auteur
Yu Lu
  • Fonction : Auteur
E. F. Bell
  • Fonction : Auteur
D. C. Koo
  • Fonction : Auteur
C. J. Papovich
  • Fonction : Auteur
R. E. Ryan
  • Fonction : Auteur
C. J. Conselice
  • Fonction : Auteur
N. Grogin
A. Koekemoer
N. P. Hathi
  • Fonction : Auteur

Résumé

We study the evolution of the number density, as a function of the size, of passive early-type galaxies (ETGs) with a wide range of stellar masses (10(10) M-circle dot \textless M-* less than or similar to 10(11.5) M-circle dot) from z similar to 3 to z similar to 1, exploiting the unique data set available in the GOODS-South field, including the recently obtained WFC3 images as part of the Cosmic Assembly Near-infrared Deep Extragalactic Legacy Survey. In particular, we select a sample of similar to 107 massive (M-* \textgreater 10(10) M-circle dot), passive (SSFR \textless 10(-2) Gyr(-1)), and morphologically spheroidal galaxies at 1.2 \textless z \textless 3, taking advantage of the panchromatic data set available for GOODS, including VLT, CFHT, Spitzer, Chandra, and HST ACS+WFC3 data. We find that at 1 \textless z \textless 3 the passively evolving ETGs are the reddest and most massive objects in the universe, and we prove that a correlation between mass, morphology, color, and star formation activity is already in place at that epoch. We measure a significant evolution in the mass-size relation of passive ETGs from z similar to 3 to z similar to 1, with galaxies growing on average by a factor of two in size in a 3 Gyr timescale only. We also witness an increase in the number density of passive ETGs of 50 times over the same time interval. We find that the first ETGs to form at z greater than or similar to 2 are all compact or ultra-compact, while normal-sized ETGs (meaning ETGs with sizes comparable to those of local counterparts of the same mass) are the most common ETGs only at z \textless 1. The increase of the average size of ETGs at 0 \textless z \textless 1 is primarily driven by the appearance of new large ETGs rather than by the size increase of individual galaxies.

Dates et versions

hal-01434421 , version 1 (13-01-2017)

Identifiants

Citer

P. Cassata, M. Giavalisco, C. C. Williams, Yicheng Guo, Bomee Lee, et al.. CONSTRAINING THE ASSEMBLY OF NORMAL AND COMPACT PASSIVELY EVOLVING GALAXIES FROM REDSHIFT z=3 TO THE PRESENT WITH CANDELS. The Astrophysical Journal, 2013, 775 (2), ⟨10.1088/0004-637X/775/2/106⟩. ⟨hal-01434421⟩
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