Galaxy evolution in clusters from z=1 to z=0
Proceedings of The International Astronomical Union(2004)
Abstract
The XMM--LSS project is detecting distant clusters of low mass, quite
comparable in mass to the ones in the local universe. This allows a direct
comparison of galaxy properties at different redshifts in ``similar'' clusters.
We present here first results on the evolution of the reddest galaxies in ~25
clusters/groups at ~0.3< z <~1.0 and for the whole galaxy population in the
same clusters. The emerging picture from the current study is that the
counterparts of present day clusters tend to show two or more distinct
populations : a relatively old (z_f>2-5) population evolving passively together
with a younger population, ostensibly responsible for the apparent brightening
of the characteristic magnitudes, m*.
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Key words
galaxy evolution
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