Instruct: Identify the main and secondary category of Arxiv papers based on the titles and abstracts
Query: The CFHT Legacy Survey: The Morphology-Density Relation of Galaxies out
  to Z~1   We study the relationships between galaxy total luminosity (M_g), morphology,
color and environment as a function of redshift. We use a magnitude-limited
sample of 65,624 galaxies in the redshift range 0<z<1.3 taken from one of the
Canada-France-Hawaii Telescope Legacy Survey Deep Fields. We parametrize galaxy
morphology according to the Sersic index n. Our n>2 number fractions at z=0.1
agree well with those based on SDSS galaxies. We find that the n>2 galaxy
number fraction is constant with redshift in the field. However, for overdense
environments this fraction is larger and increases towards lower redshifts,
higher densities and higher luminosities. Rest-frame color-magnitude diagrams
show that the color distribution is bimodal out to our redshift limit of z~1
with a prominent red-sequence of galaxies at 0.2<z<0.4 and a large blue-peak
dominance at 0.8<z<1. We use this bimodality to define a red galaxy fraction
(rest-frame u-g>1). For all environments, this fraction increases towards lower
redshifts and higher luminosities. The red fraction within cluster-like regions
changes 60% faster with redshift as compared to the field for M_g<-19.5. Using,
for the first time, observations across many cluster-field interfaces
distributed over a single, large volume, we trace the large-scale
morphology-density relation and the Butcher-Oemler effect over a period of
almost 8 Gyr.

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The categories of this paper are: bayes-an
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The categories of this paper are: adap-org
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The categories of this paper are: hep-ex
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The categories of this paper are: solv-int
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The categories of this paper are: funct-an
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The categories of this paper are: atom-ph
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The categories of this paper are: plasm-ph
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The categories of this paper are: mtrl-th
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The categories of this paper are: chem-ph
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The categories of this paper are: math
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The categories of this paper are: patt-sol
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The categories of this paper are: acc-phys
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The categories of this paper are: physics
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The categories of this paper are: cond-mat
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The categories of this paper are: quant-ph
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The categories of this paper are: nucl-ex