Eke, V. R. and Baugh, C. M. and Cole, S. and Frenk, C. S. and Norberg, P. and Peacock, J. A. and Baldry, I. K. and Bland-Hawthorn, J. and Bridges, T. and Cannon, R. and Colless, M. and Collins, C. and Couch, W. and Dalton, G. and de Propris, R. and Driver, S. P. and Efstathiou, G. and Ellis, R. S. and Glazebrook, K. and Jackson, C. and Lahav, O. and Lewis, I. and Lumsden, S. and Maddox, S. and Madgwick, D. and Peterson, B. A. and Sutherland, W. (2004) 'Galaxy groups in the 2dFGRS : the group-finding algorithm and the 2PIGG catalogue.', Monthly notices of the Royal Astronomical Society., 348 (3). pp. 866-878.
The construction of a catalogue of galaxy groups from the Two-degree Field Galaxy Redshift Survey (2dFGRS) is described. Groups are identified by means of a friends-of-friends percolation algorithm which has been thoroughly tested on mock versions of the 2dFGRS generated from cosmological N-body simulations. The tests suggest that the algorithm groups all galaxies that it should be grouping, with an additional 40 per cent of interlopers. About 55 per cent of the 190 000 galaxies considered are placed into groups containing at least two members of which 29 000 are found. Of these, 7000 contain at least four galaxies, and these groups have a median redshift of 0.11 and a median velocity dispersion of 260 km s1. This 2dFGRS Percolation-Inferred Galaxy Group (2PIGG) catalogue represents the largest available homogeneous sample of galaxy groups. It is publicly available on the World Wide Web.
|Keywords:||Catalogues, Galaxies, Clusters.|
|Full text:||Full text not available from this repository.|
|Publisher Web site:||http://dx.doi.org/10.1111/j.1365-2966.2004.07408.x|
|Record Created:||22 Feb 2008|
|Last Modified:||08 Apr 2009 16:25|
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