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

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    Wilson_2012_MNRAS_427(1)550.pdf (1.721Mb)
    Issue Date
    2012-01-01
    Author
    Lidman, Chris
    Suherli, J.
    Muzzin, A.
    Wilson, Graham Wallace
    Demarco, Rafael Senos
    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.
    Webb, T. M. A.
    Publisher
    Oxford University Press
    Type
    Article
    Article Version
    Scholarly/refereed, publisher version
    Metadata
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    Abstract
    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.
    Description
    This article has been accepted for publication in Monthly Notices Of The Royal Astronomical Society ©: 2012 C. Lidman et al. Published by Oxford University Press on behalf of the Royal Astronomical Society. All rights reserved.
    URI
    http://hdl.handle.net/1808/17841
    DOI
    https://doi.org/10.1111/j.1365-2966.2012.21984.x
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    • Physics and Astronomy Scholarly Works [1411]
    Citation
    Lidman, C. et al. (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):550-568. http://www.dx.doi.org/10.1111/j.1365-2966.2012.21984.x.

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    KU Libraries
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    Contact KU ScholarWorks
    785-864-8983
    KU Libraries
    1425 Jayhawk Blvd
    Lawrence, KS 66045
    785-864-8983

    KU Libraries
    1425 Jayhawk Blvd
    Lawrence, KS 66045
    Image Credits
     

     

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