Instruct: Identify the main and secondary category of Arxiv papers based on the titles and abstracts
Query: The Durham/UKST Galaxy Redshift Survey - IV. Redshift Space Distortions
  via the 2-Point Correlation Function   We have investigated the redshift space distortions in the optically selected
Durham/UKST Galaxy Redshift Survey using the 2-point galaxy correlation
function perpendicular and parallel to the observer's line of sight. We present
results for the real space 2-point correlation function, by inverting the
optimally estimated projected correlation function and find good agreement with
other real space estimates. On small, non-linear scales we observe an
elongation of the z-space corelation function contours in the line of sight
direction. Our result for the 1-D pairwise rms velocity dispersion is sigma =
416 +- 36 kms^-1 which is consistent with those from recent redshift surveys
and canonical values, but inconsistent with SCDM or LCDM models. On larger,
linear scales we observe a compression of the z-space correlation function
contours in the line of sight direction. This is due to the infall of galaxies
into overdense regions and the Durham/UKST data favours a value of Omega^0.6/b
= 0.5, where Omega is the mean mass density of the Universe and b is the linear
bias factor which relates the galaxy and mass distributions. Comparison with
other optical estimates yield consistent results, with the conclusion that the
data does not favour an unbiased critical-density universe.

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The categories of this paper are: cmp-lg
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The categories of this paper are: hep-th
30
The categories of this paper are: q-alg
1
The categories of this paper are: cs
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The categories of this paper are: eess
31
The categories of this paper are: ao-sci
20
The categories of this paper are: acc-phys
5
The categories of this paper are: gr-qc
4
The categories of this paper are: cond-mat
16
The categories of this paper are: stat
15
The categories of this paper are: nucl-ex
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The categories of this paper are: mtrl-th
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The categories of this paper are: atom-ph
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The categories of this paper are: solv-int
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The categories of this paper are: nlin
10
The categories of this paper are: q-bio