Color distribution of galaxies in the CFHTLS-Deep fields
Abstract
We present the results obtained on the color distribution of galaxies in the CFHTLS-Deep Field Survey Data Release 03. Photometric redshifts have been computed using a standard SED fitting approach, with a new version of the public code HyperZ (New-HyperZ). Large samples of galaxies with well determined photometric redshifts in the 0<z<1.3 interval have been selected in the four CFHTLS Deep fields, within the completeness limit in absolute luminosity in u and r bands. We study the restframe color distribution of galaxies as a function of redshift, luminosity and local density. Our results are consistent with a bimodal color distribution, where red galaxies dominate the highest luminosities out to z ∼ 0.6. An important population of blue and bright galaxies appears beyond this redshift, increasing with redshift. Out to z ∼ 1.3, a strong evolution is observed, at a given redshift, in the color distribution of galaxies as a function of luminosity, together with a mild evolution with the local density at fixed luminosity.
Based on observations obtained with MegaPrime/MegaCam, a joint project of CFHT and CEA/DAPNIA, at the Canada-France-Hawaii Telescope (CFHT), which is operated by the National Research Council (NRC) of Canada, the Institut National des Sciences de l'Univers of the Centre National de la Recherche Scientifique (CNRS) of France, and the University of Hawaii. This work is based in part on data products produced at TERAPIX and the Canadian Astronomy Data Center as part of the Canada-France-Hawaii Telescope Legacy Survey, a collaborative project of NRC and CNRS.
- Publication:
-
SF2A-2006: Semaine de l'Astrophysique Francaise
- Pub Date:
- June 2006
- DOI:
- arXiv:
- arXiv:astro-ph/0611759
- Bibcode:
- 2006sf2a.conf..347I
- Keywords:
-
- Astrophysics
- E-Print:
- 4 page, 2 figures, SF2A 2006 V2: new fig1