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Title

The luminosity-halo mass relation for brightest cluster galaxies

Author(s)

Brough, S.;  Couch, W. J.;  Collins, Chris A.;  Jarrett, Thomas H.;  Burke, Douglas J.;  Mann, Robert G.

Abstract

We examine the central galaxy luminosity-host halo mass relation for 54 brightest group galaxies (BGGs) and 92 brightest cluster galaxies (BCGs) at z < 0.1 and present the first measurement of this relation for a sample of known BCGs at 0.1 < z < 0.8((z)over bar similar to 0.3). At z < 0.1 we find L-K alpha M-200(0.24 +/- 0.08) for the BCGs and the early-type BGGs in groups with extended X-ray emission and L-K alpha M-200(0.11 +/- 10) for the BCGs alone. At 0.1 < z < 0.8 we find L-K alpha M-200(0.28 +/- 0.11). We conclude that there is no evidence for evolution in this relationship between z < 0.1 and z < 0.8: BCG growth appears to still be limited by the time-scale for dynamical friction at these earlier times, not proceeding according to the predictions of present semianalytic models.

Publication type

Journal article

Research centre

Swinburne University of Technology. Faculty of Information and Communication Technologies. Centre for Astrophysics and Supercomputing

Source

Monthly Notices of the Royal Astronomical Society Letters, Vol. 385, no. 1 (Mar 2008), pp. L103-L107

Publication year

2008

FOR Code(s)

0201 Astronomical and Space Sciences;  020103 Cosmology and Extragalactic Astronomy

Keyword(s)

Band hubble diagram;  Catalog;  Galaxy clusters;  Elliptical galaxies;  Galaxy evolution;  Galaxy formation;  Gems;  Halo/subhalo mass;  Lenticular galaxies;  Mergers;  Nonparametric model;  Occupation distribution;  Red galaxies

Publisher

Wiley-Blackwell Publishing

ISSN

0035-8711

Publisher URL

http://dx.doi.org/10.1111/j.1745-3933.2008.00442.x

Copyright

Copyright © 2008 The Authors. Journal compilation copyright © 2008 Royal Astronomical Society. The accepted manuscript is reproduced in accordance with the copyright policy of the publisher. The definitive publication is available at www.interscience.wiley.com.

Full text

Peer reviewed