The 2dF Galaxy Redshift Survey: the blue galaxy fraction and implications for the Butcher-Oemler effect
- Creators
- De Propris, Roberto
- Colless, Matthew
- Peacock, John A.
- Couch, Warrick J.
- Driver, Simon P.
- Balogh, Michael L.
- Baldry, Ivan K.
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Baugh, Carlton M.
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Bland-Hawthorn, Joss
- Bridges, Terry
- Cannon, Russell
- Cole, Shaun
- Collins, Chris
- Cross, Nicholas
- Dalton, Gavin
- Efstathiou, George
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Ellis, Richard S.
- Frenk, Carlos S.
- Glazebrook, Karl
- Hawkins, Edward
- Jackson, Carole
- Lahav, Ofer
- Lewis, Ian
- Lumsden, Stuart
- Maddox, Steve
- Madgwick, Darren
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Norberg, Peder
- Percival, Will
- Peterson, Bruce A.
- Sutherland, Will
- Taylor, Keith
- 2dFGRS Team
Abstract
We derive the fraction of blue galaxies in a sample of clusters at z < 0.11 and the general field at the same redshift. The value of the blue fraction is observed to depend on the luminosity limit adopted, cluster-centric radius and, more generally, local galaxy density, but it does not depend on cluster properties. Changes in the blue fraction are due to variations in the relative proportions of red and blue galaxies but the star formation rate for these two galaxy groups remains unchanged. Our results are most consistent with a model where the star formation rate declines rapidly and the blue galaxies tend to be dwarfs and do not favour mechanisms where the Butcher–Oemler effect is caused by processes specific to the cluster environment.
Additional Information
© 2004 RAS. Accepted 2004 February 20. Received 2004 February 19; in original form 2004 January 20. We are indebted to the staff at the Anglo-Australian Observatory for their tireless effort and assistance in supporting 2dF during the course of the survey. We are also grateful to the Australian and UK time assignment committees for their continued support for this project. The work of WJC is supported by a grant from the Australian Research Council. MLB acknowledges a Particle Physics and Astronomy Research Council (PPARC) fellowship PPA/P/S/2001/00298. We wish to thank the referee, Tomotsugu Goto, for a useful report, which greatly improved the clarity of this paper.Attached Files
Published - 2004MNRAS_351__125D.pdf
Accepted Version - 0402652.pdf
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Additional details
- Eprint ID
- 104450
- Resolver ID
- CaltechAUTHORS:20200720-124522705
- Australian Research Council
- Particle Physics and Research Council (PPARC)
- PPA/P/S/2001/00298
- Created
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2020-07-21Created from EPrint's datestamp field
- Updated
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2021-11-16Created from EPrint's last_modified field