The 2dF galaxy redshift survey: The clustering of galaxy groups

Nelson D. Padilla, Carlton M. Baugh, Vincent R. Eke, Peder Norberg, Shaun Cole, Carlos S. Frenk, Darren J. Croton, Ivan K. Baldry, Joss Bland-Hawthorn, Terry Bridges, Russell Cannon, Matthew Colless, Chris Collins, Warrick Couch, Gavin Dalton, Roberto De Propris, Simon P. Driver, George Efstathiou, Richard S. Ellis, Karl GlazebrookCarole Jackson, Ofer Lahav, Ian Lewis, Stuart Lumsden, Steve Maddox, Darren Madgwick, John A. Peacock, Bruce A. Peterson, Will Sutherland, Keith Taylor

Research output: Contribution to journalReview article

56 Citations (Scopus)

Abstract

We measure the clustering of galaxy groups in the 2dFGRS Percolation-Inferred Galaxy Group (2PIGG) catalogue. The 2PIGG sample has 28 877 groups with at least two members. The clustering amplitude of the full 2PIGG catalogue is weaker than that of 2dFGRS galaxies, in agreement with theoretical predictions. We have subdivided the 2PIGG catalogue into samples that span a factor of ≈ 25 in median total luminosity. Our correlation function measurements span an unprecedented range of clustering strengths, connecting the regimes probed by groups fainter than galaxies and rich clusters. There is a steady increase in clustering strength with group luminosity; the most luminous groups are 10 times more strongly clustered than the full 2PIGG catalogue. We demonstrate that the 2PIGG results are in very good agreement with the clustering of groups expected in the ACDM model.

Original languageEnglish
Pages (from-to)211-225
Number of pages15
JournalMonthly Notices of the Royal Astronomical Society
Volume352
Issue number1
DOIs
Publication statusPublished - 21 Jul 2004
Externally publishedYes

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