Buildup of Massive Red Galaxies at redshift z=0.3

Details Buildup of Massive Red Galaxies at redshift z=0.3 Buildup of Massive Red Galaxies at redshift z=0.3

Dec 2006

adsabs.harvard.edu/cgi-bin/nph-data_query?bibcode=2006aas...209.1906m&link_type=abstract

2007 AAS/AAPT Joint Meeting, American Astronomical Society Meeting 209, #19.06; Bulletin of the American Astronomical Society, V

Astronomy and Astrophysics

Astronomy

1

Scientific paper

Recent work on the luminosity function and its evolution has found evidence for substantial growth of galaxies on the red sequence by merging. This process will show itself in the very small-scale clustering of galaxies around red-sequence galaxies. Here we independently measure the growth of galaxies by measuring and interpreting the cross-correlation of massive red galaxies with red and blue galaxies of various luminosities and interpreting that cross-correlation at very small scales as the result of a continuous merging process. We find that the accretion onto massive red galaxies is dominated by dry mergers of galaxies more massive than L*. In addition, we integrate the mass build-up due to all merger events and we find that these massive red galaxies are growing by about 2.5 percent per Gyr due to merger activity at redshift 0.3.

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