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The 2dF Galaxy Redshift Survey: a targeted study of catalogued clusters of galaxies

De Propris, Roberto and Couch, Warrick J. and Colless, Matthew and Dalton, Gavin B. and Collins, Chris and Baugh, Carlton M. and Bland-Hawthorn, Joss and Bridges, Terry and Cannon, Russell and Cole, Shaun and Cross, Nicholas and Deeley, Kathryn and Driver, Simon P. and Efstathiou, George and Ellis, Richard S. and Frenk, Carlos S. and Glazebrook, Karl and Jackson, Carole and Lahav, Ofer and Lewis, Ian and Lumsden, Stuart and Maddox, Steve and Madgwick, Darren and Moody, Stephen and Norberg, Peder and Peacock, John A. and Percival, Will and Peterson, Bruce A. and Sutherland, Will and Taylor, Keith (2002) The 2dF Galaxy Redshift Survey: a targeted study of catalogued clusters of galaxies. Monthly Notices of the Royal Astronomical Society, 329 (1). pp. 87-101. ISSN 0035-8711. doi:10.1046/j.1365-8711.2002.04958.x.

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We have carried out a study of known clusters within the 2dF Galaxy Redshift Survey (2dFGRS) observed areas and have identified 431 Abell, 173APM and 343 EDCC clusters. Precise redshifts, velocity dispersions and new centroids have been measured for the majority of these objects, and this information is used to study the completeness of these catalogues, the level of contamination from foreground and background structures along the cluster's line of sight, the space density of the clusters as a function of redshift, and their velocity dispersion distributions. We find that the Abell and EDCC catalogues are contaminated at the level of about 10 per cent, whereas the APM catalogue suffers only 5 per cent contamination. If we use the original catalogue centroids, the level of contamination rises to approximately 15 per cent for the Abell and EDCC catalogues, showing that the presence of foreground and background groups may alter the richness of clusters in these catalogues. There is a deficiency of clusters at z ~ 0.05 that may correspond to a large underdensity in the Southern hemisphere. From the cumulative distribution of velocity dispersions for these clusters, we derive a space density of σ > 1000 km s⁻¹ clusters of 3.6 × 10⁻⁶ h³ Mpc⁻³. This result is used to constrain models for structure formation; our data favour low-density cosmologies, subject to the usual assumptions concerning the shape and normalization of the power spectrum.

Item Type:Article
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URLURL TypeDescription Paper
Colless, Matthew0000-0001-9552-8075
Baugh, Carlton M.0000-0002-9935-9755
Bland-Hawthorn, Joss0000-0001-7516-4016
Ellis, Richard S.0000-0001-7782-7071
Norberg, Peder0000-0002-5875-0440
Additional Information:© 2002 RAS. Accepted 2001 August 28. Received 2001 August 10; in original form 2001 December 21. RDP and WJC acknowledge funding from the Australian Research Council for this work. We are indebted to the staff of the Anglo-Australian Observatory for their tireless efforts and assistance in supporting 2dF throughout the course of the survey. We are also grateful to the Australian and UK time assignment committees for their continued support for this project.
Funding AgencyGrant Number
Australian Research CouncilUNSPECIFIED
Subject Keywords:astronomical data bases: miscellaneous, surveys, galaxies: clusters: general, galaxies: distances and redshifts, cosmology: observations
Issue or Number:1
Record Number:CaltechAUTHORS:20200601-103014074
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Official Citation:Roberto de Propris, Warrick J. Couch, Matthew Colless, Gavin B. Dalton, Chris Collins, Carlton M. Baugh, Joss Bland-Hawthorn, Terry Bridges, Russell Cannon, Shaun Cole, Nicholas Cross, Kathryn Deeley, Simon P. Driver, George Efstathiou, Richard S. Ellis, Carlos S. Frenk, Karl Glazebrook, Carole Jackson, Ofer Lahav, Ian Lewis, Stuart Lumsden, Steve Maddox, Darren Madgwick, Stephen Moody, Peder Norberg, John A. Peacock, Will Percival, Bruce A. Peterson, Will Sutherland, Keith Taylor, The 2dF Galaxy Redshift Survey: a targeted study of catalogued clusters of galaxies, Monthly Notices of the Royal Astronomical Society, Volume 329, Issue 1, January 2002, Pages 87–101,
Usage Policy:No commercial reproduction, distribution, display or performance rights in this work are provided.
ID Code:103590
Deposited By: George Porter
Deposited On:01 Jun 2020 20:29
Last Modified:16 Nov 2021 18:23

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