Instruct: Identify the main and secondary category of Arxiv papers based on the titles and abstracts
Query: Anisotropies in the redshift-space correlations of galaxy groups and
  clusters I: Simulated catalogues   We analyse the correlation function of mock galaxy clusters in redshift
space. We constructed several mock catalogues designed to mimic the selection
biases inherent in a variety of observational surveys. We explore different
effects that contribute to the distortion of the clustering pattern; the
pairwise velocity distribution of galaxy systems, coherent bulk motions,
redshift errors and systematics in cluster identification. Our tests show that
the redshift-space clustering pattern of galaxy systems is highly influenced by
effects associated with the identification procedure from two dimensional
surveys. These systems show a spuriously large correlation amplitude, an effect
that is present and even stronger in a subsample whose angular positions
coincide with 3-dimensional identified clusters. The use of a small number of
redshift measurements in the determination of the cluster distance has a
smaller impact on the measured correlation function. We show that an angular
incompleteness in redshift surveys, such as that present in the 2dFGRS 100k
public release, has no significant effect in the results. We suggest that the
nature of projection effects arise mainly from structures along the line of
sight in the filamentary large-scale clustering pattern. Thus spectroscopic
surveys are the only means of providing unbiased cluster samples.

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The categories of this paper are: chem-ph
14
The categories of this paper are: math-ph
2
The categories of this paper are: math
36
The categories of this paper are: cmp-lg
25
The categories of this paper are: patt-sol
13
The categories of this paper are: quant-ph
17
The categories of this paper are: q-fin
29
The categories of this paper are: funct-an
16
The categories of this paper are: stat
11
The categories of this paper are: hep-lat
30
The categories of this paper are: q-alg
33
The categories of this paper are: plasm-ph
5
The categories of this paper are: gr-qc
12
The categories of this paper are: nucl-th
10
The categories of this paper are: q-bio
1
The categories of this paper are: cs