Galaxy Evolution Since z=2 Seen By The Combo17+4 Survey

Details Galaxy Evolution Since z=2 Seen By The Combo17+4 Survey Galaxy Evolution Since z=2 Seen By The Combo17+4 Survey

Dec 2009

adsabs.harvard.edu/cgi-bin/nph-data_query?bibcode=2009aas...21360811n&link_type=abstract

American Astronomical Society, AAS Meeting #213, #608.11

Astronomy and Astrophysics

Astronomy

Scientific paper

The deep multiwavelength survey COMBO 17+4 (Classifying Objects by Medium-Band Observations) combines 17 broad and medium optical bands from 365nm to 914nm with 4 near infrared bands from 1034nm to 1650nm. To minimize the influence of the large scale structures three independent fields are observed: Abell 901, Abell 226 and S11 for a total coverage of 0.77 square degree of the sky. The optical data were obtained with the Wide Field Imager at La Silla Observatory in Chile while the near infrared data are observed with the wide field IR camera Omega2000 attached to the 3.5m telescope at the Calar Alto Observatory in Spain.
Photometric redshifts, rest-frame SEDs and stellar masses have been obtained for 16944 galaxies in 0.2 square degree of the A901-field. The sample contain 2662 galaxies with a selected magnitude mH<21.0 (10 sigma) in the redshift range 1The blue and the red galaxy population is followed out to z=2. Our data show that the very red galaxies (u-v>1) already occupy at z=1.5 the region of the red sequence as defined at z=1. We investigate whether the absence of a pronounced deficit of galaxies between the reddest ones and the blue cloud is intrinsic or caused by the increasing error of u-v. The luminosity function and mass function for the red sequence and blue galaxies out to z=2 will be presented.

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