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The 2dF Galaxy Redshift Survey: the blue galaxy fraction and implications for the Butcher-Oemler effect

De Propris, R.; Colless, M.; Peacock, J.A.; Couch, W.J.; Driver, S.P.; Balogh, M.L.; Baldry, I.K.; Baugh, C.M.; Bland-Hawthorn, J.; Bridges, T.; Cannon, R.; Cole, S.; Collins, C.; Cross, N.; Dalton, G.; Efstathiou, G.; Ellis, R.S.; Frenk, C.S.; Glazebrook, K.; Hawkins, E.; Jackson, C.; Lahav, O.; Lewis, I.; Lumsden, S.; Maddox, S.; Madgwick, D.; Norberg, P.; Percival, W.; Peterson, B.A.; Sutherland, W.; Taylor, K.

Authors

R. De Propris

M. Colless

J.A. Peacock

W.J. Couch

S.P. Driver

M.L. Balogh

I.K. Baldry

J. Bland-Hawthorn

T. Bridges

R. Cannon

C. Collins

N. Cross

G. Dalton

G. Efstathiou

R.S. Ellis

K. Glazebrook

E. Hawkins

C. Jackson

O. Lahav

I. Lewis

S. Lumsden

S. Maddox

D. Madgwick

W. Percival

B.A. Peterson

W. Sutherland

K. Taylor



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.

Citation

De Propris, R., Colless, M., Peacock, J., Couch, W., Driver, S., Balogh, M., …Taylor, K. (2004). The 2dF Galaxy Redshift Survey: the blue galaxy fraction and implications for the Butcher-Oemler effect. Monthly Notices of the Royal Astronomical Society, 351(1), 125-132. https://doi.org/10.1111/j.1365-2966.2004.07756.x

Journal Article Type Article
Publication Date 2004-06
Deposit Date Apr 19, 2011
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 351
Issue 1
Pages 125-132
DOI https://doi.org/10.1111/j.1365-2966.2004.07756.x