Instruct: Identify the main and secondary category of Arxiv papers based on the titles and abstracts
Query: GaBoDS: The Garching-Bonn Deep Survey: VII. Probing galaxy bias using
  weak gravitational lensing   [ABRIDGED] The weak gravitational lensing effect is used to infer matter
density fluctuations within the field-of-view of the Garching-Bonn Deep Survey
(GaBoDS). This information is employed for a statistical comparison of the
galaxy distribution to the total matter distribution. The result of this
comparison is expressed by means of the linear bias factor, b, the ratio of
density fluctuations, and the correlation factor $r$ between density
fluctuations. The total galaxy sample is divided into three sub-samples using
R-band magnitudes and the weak lensing analysis is applied separately for each
sub-sample. Together with the photometric redshifts from the related COMBO-17
survey we estimate the typical mean redshifts of these samples with
$\bar{z}=0.35, 0.47, 0.61$, respectively. For all three samples, a slight
galaxy anti-bias, b~0.8+-0.1, on scales of a few Mpc/h is found; the bias
factor shows evidence for a slight scale-dependence. The correlation between
galaxy and (dark) matter distribution is high, r~0.6+-0.2, indicating a
non-linear or/and stochastic biasing relation between matter and galaxies.
Between the three samples no significant evolution with redshift is found.

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The categories of this paper are: mtrl-th
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The categories of this paper are: cmp-lg
17
The categories of this paper are: q-fin
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The categories of this paper are: funct-an
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The categories of this paper are: stat
23
The categories of this paper are: solv-int
0
The categories of this paper are: hep-ph
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The categories of this paper are: chao-dyn
1
The categories of this paper are: cs
26
The categories of this paper are: bayes-an
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The categories of this paper are: q-bio
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The categories of this paper are: nucl-th
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The categories of this paper are: adap-org
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The categories of this paper are: comp-gas
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The categories of this paper are: nlin
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The categories of this paper are: hep-ex