IAU02667
Presentation type requested: EITHER
THE COLOR-MAGNITUDE DISTRIBUTION OF GALAXIES FROM THE SDSS
Ivan K Baldry
Johns Hopkins University
We analysis the bivariate distribution, in color versus absolute magnitude (u-r vs. M_r), of a low redshift sample of galaxies from the Sloan Digital Sky Survey (0.004<z<0.08). We trace the bimodality of the distribution from luminous to faint galaxies by fitting double-Gaussians to the color functions separated in absolute magnitude bins. Color-magnitude relations are obtained for `early- and late-type' galaxies without using any cut in morphology. Instead, the analysis is based on the assumption of normal Gaussian distributions in color. Separate luminosity functions are obtained for the two distributions which are consistent with galaxy mergers giving rise to the `red distribution'.
Glazebrook Karl , SDSS Collaboration
IAU XXV General Assembly | IAU216 HOME PAGE | IAU216 Speaker Program | IAU216 Poster Program