Correlation Function of Galaxy Groups

Abstract

We use the Updated Zwicky Catalog of galaxies (Falco et al. 1999) to generate a catalog of groups, by means of a friend-of-friend algorithm. The correlation length of the total sample is well fitted with a power law $\xi (r)=(r/r_0{)}^{\gamma }$ with parameters $r_0=9.0\pm 0.4h^{-1}Mpc$ and $\gamma =-1.67\pm 0.09$ for values of $r<70h^{-1}Mpc$. Three subsamples defined by the range of group virial masses $\mathcal{M}$ were used to have their clustering properties examined throughout the autocorrelation function. We find an increase of the amplitude of the correlation function according to the group masses which extends the results of the $r_0-d_c$ relation for galaxy systems at small $d_c$. For completeness we have also analyzed a sample of groups obtained from the Southern Sky Redshift Survey (da Costa et al.1998) in the range of virial masses $5\times 10^{12}{M}_{\odot }<\mathcal{M}<4\times 10^{14}{M}_{\odot }$ to compare the results with those obtained from GUZC.

9 figures, accepted for publication in ApJ

References in corpus (5)

• The Updated Zwicky Catalog (UZC)
• The Galaxy Luminosity Function at z < 0.05: Dependence on Morphology
• The Southern Sky Redshift Survey
• Correlation length of X-ray brightest Abell clusters
• The Durham/UKST Galaxy Redshift Survey -III. Large Scale Structure via the 2-Point Correlation Function

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• The DEEP2 Galaxy Redshift Survey: Clustering of Groups and Group Galaxies at z~1
• Environmental Enhancement of Loose Groups around Rich Clusters of Galaxies
• Finding structures in photometric redshift galaxy surveys: An extended friends-of-friends algorithm
• The Seyfert Population in the Local Universe
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• Las Campanas Loose Groups in the Supercluster-Void Network
• Environmental Enhancement of DM Haloes
• The statistical properties of galaxy morphological types in compact groups of Main galaxies from the SDSS Data Release 4
• The Angular Clustering of Galaxy Pairs
• The Aquarius Superclusters - I. Identification of Clusters and Superclusters
• Galaxy Peculiar Velocities and Infall onto Groups
• Cross Correlations of X-ray and Optically Selected Clusters With Near Infrared and Optical Galaxies
• Group analysis in the SSRS2 catalog
• The Neighborhood Function and Its Application to Identifying Large-Scale Structure in the Comoving Universe Frame