The Color-Magnitude-Morphology-Density Relation of Galaxies out to z~1 from the CFHTLS Deep Fields
Luc Simard(NRC-HIA), Martijn Nuyten (Leiden), Stephen Gwyn (UVic), Huub Rottgering (Leiden)

We study the relationships between galaxy total luminosity (%24M_%7Bg'%7D%24), morphology and environment as a function of redshift. We use a magnitude-limited sample of 65,624 galaxies in the redshift range 0 < z < 1.3 taken from one of the 1 deg x 1 deg Canada--France--Hawaii Telescope Legacy Survey Deep Fields. We find that the ratio of the bulge- versus disk-dominated galaxy number fraction is more or less constant with redshift. However, from %24%5Cbar%7Bz%7D%5Csim0.9%24 to %24%5Cbar%7Bz%7D%5Csim0.3%24, this ratio increases for overdense environments with a factor of %24%5Cgtrsim3%24 for %24M_%7Bg'%7D<-22%24. The redshift z_c at which more than 50%25 of the %24M_%7Bg'%7D<-20%24 galaxy population consists of bulge-dominated galaxies increases with the local density with %24z_c%5Clesssim0.5%24 and %24z_c%5Cgtrsim0.8%24 for the slightly and most overdense regions respectively. The ratio of the red vs. blue galaxy number fraction also increases towards lower redshifts and higher luminosities with a ~60%25 stronger evolution for galaxies within the densest environments relative to those residing in the field (%24M_%7Bg'%7D<-19.5%24). The observed trends essentially trace the large-scale morphology-density relation and the Butcher-Oemler effect over a period of almost 8 Gyr. Rest-frame color-magnitude-morphology diagrams show that the color distribution is bimodal at all redshifts out to our redshift limit of z ~ 1 with a developed red-sequence of galaxies at 0.2