Clustering of loose groups and galaxies from the Perseus--Pisces Survey

Abstract

We investigate the clustering properties of loose groups in the Perseus--Pisces redshift Survey (PPS). Previous analyses based on CfA and SSRS surveys led to apparently contradictory results. We investigate the source of such discrepancies, finding satisfactory explanations for them. Furthermore, we find a definite signal of group clustering, whose amplitude $A_G$ exceeds the amplitude $A_g$ of galaxy clustering ($A_G=14.5_{-3.0}^{+3.8}$, $A_g=7.42_{-0.19}^{+0.20}$ for the most significant case; distances are measured in $\hMpc$). Groups are identified with the adaptive Friends--Of--Friends (FOF) algorithms HG (Huchra \& Geller 1982) and NW (Nolthenius \& White 1987), systematically varying all search parameters. Correlation strenght is especially sensitive to the sky--link $D_L$ (increasing for stricter normalization $D_0$), and to the (depth $\mlim$ of the) galaxy data. It is only moderately dependent on the galaxy luminosity function $\varphi (L)$, while it is almost insensitive to the redshift--link $V_L$ (both to the normalization $V_0$ and to the scaling recipes HG or NW).

28 pages (LaTeX aasms4 style) + 5 Postscript figures ; ApJ submitted on May 4th, 1996; group catalogs available upon request ([email protected])

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Cited by in corpus (9)

• The UZC-SSRS2 Group Catalog
• The DEEP2 Galaxy Redshift Survey: Clustering of Groups and Group Galaxies at z~1
• The redshift-space two-point correlation functions of galaxies and groups in the Nearby Optical Galaxy sample
• Galaxy groups in the 2dF galaxy redshift survey: Large Scale Structure with Groups
• A global descriptor of spatial pattern interaction in the galaxy distribution
• Correlation Function of Galaxy Groups
• The 2MASS redshift survey galaxy group catalogue derived from a graph-theory based friends-of-friends algorithm
• The Angular Clustering of Galaxy Pairs
• Clusters and Groups of Galaxies in the Simulated Local Universe