Galaxy groups in the 2dFGRS: the group-finding algorithm and the 2PIGG catalogue

Details Galaxy groups in the 2dFGRS: the group-finding algorithm and the 2PIGG catalogue Galaxy groups in the 2dFGRS: the group-finding algorithm and the 2PIGG catalogue

2004-02-24

arxiv.org/abs/astro-ph/0402567v2

Mon.Not.Roy.Astron.Soc.348:866,2004

Astronomy and Astrophysics

Astrophysics

15 pages, 8 figures (1 in colour), MNRAS, 348, 866 (as before)

Scientific paper

10.1111/j.1365-2966.2004.07408.x

The construction of a catalogue of galaxy groups from the 2-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% of interlopers. About 55% of the ~190000 galaxies considered are placed into groups containing at least two members of which ~29000 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 260km/s. This 2dFGRS Percolation-Inferred Galaxy Group (2PIGG) catalogue represents the largest available homogeneous sample of galaxy groups. It is publicly available on the WWW.

Affiliated with

Also associated with

No associations

Rating

Galaxy groups in the 2dFGRS: the group-finding algorithm and the 2PIGG catalogue does not yet have a rating. At this time, there are no reviews or comments for this scientific paper.

If you have personal experience with Galaxy groups in the 2dFGRS: the group-finding algorithm and the 2PIGG catalogue, we encourage you to share that experience with our LandOfFree.com community. Your opinion is very important and Galaxy groups in the 2dFGRS: the group-finding algorithm and the 2PIGG catalogue will most certainly appreciate the feedback.

Rate now

Comments { 0 }

Profile ID: LFWR-SCP-O-351905