Dr Vincent Eke v.r.eke@durham.ac.uk
Associate Professor
Galaxy groups in the 2dFGRS: the group-finding algorithm and the 2PIGG catalogue
Eke, V.R.; Baugh, C.M.; Cole, S.; Frenk, C.S.; Norberg, P.; Peacock, J.A.; Baldry, I.K.; Bland-Hawthorn, J.; Bridges, T.; Cannon, R.; Colless, M.; Collins, C.; Couch, W.; Dalton, G.; de Propris, R.; Driver, S.P.; Efstathiou, G.; Ellis, R.S.; Glazebrook, K.; Jackson, C.; Lahav, O.; Lewis, I.; Lumsden, S.; Maddox, S.; Madgwick, D.; Peterson, B.A.; Sutherland, W.
Authors
Professor Carlton Baugh c.m.baugh@durham.ac.uk
Professor
Professor Shaun Cole shaun.cole@durham.ac.uk
Director of the Institute for Computational Cosmology
Professor Carlos Frenk c.s.frenk@durham.ac.uk
Professor
Professor Peder Norberg peder.norberg@durham.ac.uk
Professor
J.A. Peacock
I.K. Baldry
J. Bland-Hawthorn
T. Bridges
R. Cannon
M. Colless
C. Collins
W. Couch
G. Dalton
R. de Propris
S.P. Driver
G. Efstathiou
R.S. Ellis
K. Glazebrook
C. Jackson
O. Lahav
I. Lewis
S. Lumsden
S. Maddox
D. Madgwick
B.A. Peterson
W. Sutherland
Abstract
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.
Citation
Eke, V., Baugh, C., Cole, S., Frenk, C., Norberg, P., Peacock, J., …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), 866-878. https://doi.org/10.1111/j.1365-2966.2004.07408.x
Journal Article Type | Article |
---|---|
Publication Date | 2004-03 |
Deposit Date | Feb 22, 2008 |
Publicly Available Date | Aug 11, 2014 |
Journal | Monthly Notices of the Royal Astronomical Society |
Print ISSN | 0035-8711 |
Electronic ISSN | 1365-2966 |
Publisher | Royal Astronomical Society |
Peer Reviewed | Peer Reviewed |
Volume | 348 |
Issue | 3 |
Pages | 866-878 |
DOI | https://doi.org/10.1111/j.1365-2966.2004.07408.x |
Keywords | Catalogues, Galaxies, Clusters. |
Files
Published Journal Article
(1.6 Mb)
PDF
Copyright Statement
This article has been accepted for publication in Monthly notices of the Royal Astronomical Society © 2004 The Authors Published on behalf of Royal Astronomical Society. All rights reserved.
You might also like
A sparse regression approach for populating dark matter haloes and subhaloes with galaxies
(2022)
Journal Article
Solving small-scale clustering problems in approximate light-cone mocks
(2022)
Journal Article
Making use of sub-resolution haloes in N-body simulations
(2021)
Journal Article