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Evidence for significant growth in the stellar mass of brightest cluster galaxies over the past 10 billion years

Lidman, C. and Suherli, J. and Wilson, G. and Demarco, R. and Brough, S. and Rettura, A. and Cox, J. and DeGroot, A. and Yee, H. K. C. and Gilbank, D. and Hoekstra, H. and Balogh, M. and Ellingson, E. and Hicks, A. and Nantais, J. and Noble, A. and Lacy, M. and Surace, J. and Webb, T. and Muzzin, A. (2012) Evidence for significant growth in the stellar mass of brightest cluster galaxies over the past 10 billion years. Monthly Notices of the Royal Astronomical Society, 427 (1). pp. 550-568. ISSN 0035-8711. doi:10.1111/j.1365-2966.2012.21984.x.

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Using new and published data, we construct a sample of 160 brightest cluster galaxies (BCGs) spanning the redshift interval 0.03 < z < 1.63. We use this sample, which covers 70 per cent of the history of the universe, to measure the growth in the stellar mass of BCGs after correcting for the correlation between the stellar mass of the BCG and the mass of the cluster in which it lives. We find that the stellar mass of BCGs increases by a factor of 1.8 ± 0.3 between z = 0.9 and z = 0.2. Compared to earlier works, our result is closer to the predictions of semi-analytic models. However, BCGs at z = 0.9, relative to BCGs at z = 0.2, are still a factor of 1.5 more massive than the predictions of these models. Star formation rates in BCGs at z ∼ 1 are generally too low to result in significant amounts of mass. Instead, it is likely that most of the mass build up occurs through mainly dry mergers in which perhaps half of the mass is lost to the intra-cluster medium of the cluster.

Item Type:Article
Related URLs:
URLURL TypeDescription
Lidman, C.0000-0003-1731-0497
Wilson, G.0000-0002-6572-7089
Demarco, R.0000-0003-3921-2177
Brough, S.0000-0002-9796-1363
Rettura, A.0000-0002-5615-256X
Noble, A.0000-0003-1832-4137
Lacy, M.0000-0002-3032-1783
Surace, J.0000-0001-7291-0087
Muzzin, A.0000-0002-9330-9108
Additional Information:© 2012 The Authors. Monthly Notices of the Royal Astronomical Society © 2012 RAS. Accepted 2012 August 23. Received 2012 August 23; in original form 2012 July 6. Article first published online: 1 Nov. 2012. The authors thank John Stott, Chris Collins and Gabriela DeLucia for providing us with the tabulated data from their papers and for useful discussions. The data in this paper were based in part on observations obtained with WIRCam, a joint project of CFHT, Taiwan, Korea, Canada, France, at the CFHT which is operated by the National Research Council (NRC) of Canada, the Institute National des Sciences de l’Univers of the Centre National de la Recherche Scientifique of France, and the University of Hawaii. Based in part on observations taken at the ESO Paranal Observatory (ESO programmes 084.A-0214, 085.A-0166 and 085.A-0613). Based in part on observations taken at the CTIO. RD gratefully acknowledges the support provided by the BASAL Center for Astrophysics and Associated Technologies (CATA), and by FONDECYT grant N. 1100540. CL is the recipient of an Australian Research Council Future Fellowship (program number FT0992259). GW gratefully acknowledges support from NSF grant AST-0909198.
Group:Infrared Processing and Analysis Center (IPAC)
Funding AgencyGrant Number
Fondo Nacional de Desarrollo Científico y Tecnológico (FONDECYT)1100540
Australian Research CouncilFT0992259
Subject Keywords:galaxies: clusters: general; galaxies: evolution; galaxies: high-redshift; cosmology: observations
Issue or Number:1
Record Number:CaltechAUTHORS:20130117-102335466
Persistent URL:
Official Citation:Lidman, C., Suherli, J., Muzzin, A., Wilson, G., Demarco, R., Brough, S., Rettura, A., Cox, J., DeGroot, A., Yee, H. K. C., Gilbank, D., Hoekstra, H., Balogh, M., Ellingson, E., Hicks, A., Nantais, J., Noble, A., Lacy, M., Surace, J. and Webb, T. (2012), Evidence for significant growth in the stellar mass of brightest cluster galaxies over the past 10 billion years. Monthly Notices of the Royal Astronomical Society, 427: 550–568. doi: 10.1111/j.1365-2966.2012.21984.x
Usage Policy:No commercial reproduction, distribution, display or performance rights in this work are provided.
ID Code:36448
Deposited By: Jason Perez
Deposited On:18 Jan 2013 15:55
Last Modified:09 Nov 2021 23:22

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