Instruct: Identify the main and secondary category of Arxiv papers based on the titles and abstracts
Query: Galaxy Evolution in the Environment of ABCG 209   We examine the environmental effects on the photometric properties of
galaxies for the rich galaxy cluster ABCG 209 at z=0.209. We use archive CFHT
optical imaging of a 42'x28' field centred on the cluster to produce a galaxy
sample complete to B=25.0 and R=24.5. Both the composite and red sequence
galaxy luminosity functions are found to be dependent on the local galaxy
surface density, their faint-end slopes becoming shallower with increasing
density. We explain this as a combination of the morphology-density relation,
and dwarf galaxies being cannibalised and/or disrupted by the cD galaxy and the
ICM in the cluster core. The B-R colour of the red sequence itself appears
0.02mag redder for the highest-density regions, indicative of their stellar
populations being marginally (<5%) older or (<20%) more metal-rich. This may be
due to the galaxies themselves forming earliest in the rarest overdensities
marked by rich clusters, or their star-formation being suppressed earliest by
the ICM.

16
The categories of this paper are: stat
22
The categories of this paper are: chao-dyn
29
The categories of this paper are: funct-an
9
The categories of this paper are: nlin
30
The categories of this paper are: q-alg
1
The categories of this paper are: cs
35
The categories of this paper are: mtrl-th
23
The categories of this paper are: solv-int
34
The categories of this paper are: chem-ph
21
The categories of this paper are: adap-org
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The categories of this paper are: hep-lat
4
The categories of this paper are: cond-mat
28
The categories of this paper are: alg-geom
32
The categories of this paper are: atom-ph
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The categories of this paper are: q-fin
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The categories of this paper are: dg-ga