The Durham/UKST Galaxy Redshift Survey - IV. Redshift Space Distortions via the 2-Point Correlation Function

Abstract

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.

19 pages, 1 Latex File, 1 epsf file, 17 Postscript files for Figures. Needs mn.sty , Submitted to MNRAS

Cited by in corpus (31)

• The 2dF Galaxy Redshift Survey: correlation functions, peculiar velocities and the matter density of the Universe
• The 2dF Galaxy Redshift Survey: galaxy clustering per spectral type
• The 2dF-SDSS LRG and QSO Survey: The LRG 2-Point Correlation Function and Redshift-Space Distortions
• The clustering of galaxies in the SDSS-III Baryon Oscillation Spectroscopic Survey: single-probe measurements and the strong power of normalized growth rate on constraining dark energy
• Spatial and Dynamical Properties of Voids in a LCDM Universe
• The Real Space Power Spectrum of the PSCz Survey from 0.01 to 300 h/Mpc
• Tidal alignments as a contaminant of redshift space distortions
• The VLT LBG Redshift Survey I: Clustering and Dynamics of ~1000 Galaxies at z~3
• The APM cluster-galaxy cross-correlation function : Constraints on Omega and galaxy bias
• The 2dF QSO Redshift Survey - XV. Correlation analysis of redshift-Space distortions
• The 2dF QSO Redshift Survey - VII. Constraining Cosmology from Redshift Space Distortions via xi(sigma,pi)
• Galaxy Clustering and Large-Scale Structure from z = 0.2 to z = 0.5 in Two Norris Redshift Surveys
• The Durham/UKST Galaxy Redshift Survey - VI. Power spectrum analysis of clustering
• Galaxy groups in the 2dF galaxy redshift survey: Large Scale Structure with Groups
• Statistical lensing of faint QSOs by galaxy clusters
• A Radial Measurement of the Galaxy Tidal Alignment Magnitude with BOSS Data
• The Pairwise Velocity Distribution Function of Galaxies in the LCRS, 2dF, and SDSS Redshift Surveys
• Nonlinear Redshift-Space Distortions in the Harmonic-space Galaxy Power Spectrum
• Measurement of Redshift Space Power Spectrum for BOSS galaxies and the Growth Rate at redshift 0.57
• The Scaling of the Redshift Power Spectrum: Observations from the Las Campanas Redshift Survey
• Scaling properties of the redshift power spectrum: theoretical models
• Beam profile sensitivity of the WMAP CMB power spectrum
• The Durham/UKST Galaxy Redshift Survey - VII. Redshift-space distortions in the power spectrum
• Correlation function of quasars in real and redshift space from the Sloan Digital Sky Survey Data Release 7
• Modeling non-linear effects in the redshift space two-point correlation function and its implications for the pairwise velocity dispersion
• An Inversion Method for Measuring Beta in Large Redshift Surveys
• Anisotropies in the redshift-space correlations of galaxy groups and clusters I: Simulated catalogues
• The Effect of Lensing on the Large-Scale CMB Anisotropy
• Bayesian analysis of spatially distorted cosmic signals from Poissonian data
• Determining accurate measurements of the growth rate from the galaxy correlation function in simulations
• Clustering of 2PIGG galaxy groups with 2dFGRS galaxies