The ultraviolet upturn in brightest cluster galaxies

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dc.contributor.author Loubser, Susan Ilani
dc.contributor.author Sánchez-Blázquez, P.
dc.date.accessioned 2012-11-12T09:46:54Z
dc.date.available 2012-11-12T09:46:54Z
dc.date.issued 2011
dc.identifier.citation Loubser, S.I. & Sánchez-Blázquez, P. 2011. The ultraviolet upturn in brightest cluster galaxies. Monthly notices of the Royal Astronomical Society, 410(4):2679-2689. [http://onlinelibrary.wiley.com/journal/10.1111/%28ISSN%291365-2966/] en_US
dc.identifier.issn 0035-8711
dc.identifier.issn 1365-2966 (Online)
dc.identifier.uri http://hdl.handle.net/10394/7748
dc.description.abstract This paper is part of a series devoted to the investigation of a large sample of brightest cluster galaxies (BCGs), their properties and the relationships between these properties and the properties of the host clusters. In this paper, we compare the stellar population properties derived from high signal-to-noise ratio, optical long-slit spectra with the Galaxy Evolution Explorer (GALEX) ultraviolet (UV) colour measurements for 36 nearby BCGs to understand the diversity in the most rapidly evolving feature in old stellar systems, the UV upturn. We investigate (1) the possible differences between the UV upturn of BCGs and that of a control sample of ordinary ellipticals in the same mass range, as well as possible correlations between the UV upturn and other general properties of the galaxies; (2) the possible correlations between the UV upturn and the properties of the host clusters and (3) the recently proposed scenarios where helium sedimentation in the cluster centre can produce an enhanced UV upturn. We find systematic differences between the UV colours of BCGs and ordinary ellipticals, but we do not find correlations between these colours and the properties of the host clusters. Furthermore, the observations do not support the predictions made by the helium-sedimentation model as an enhancer of the UV upturn. en_US
dc.description.uri http://dx.doi.org/10.1111/j.1365-2966.2010.17666.x
dc.description.uri http://onlinelibrary.wiley.com/doi/10.1111/j.1365-2966.2010.17666.x/pdf
dc.language.iso en en_US
dc.publisher Wiley en_US
dc.subject Galaxies: elliptical and lenticular, cD en_US
dc.subject galaxies: evolution en_US
dc.subject galaxies: stellar content en_US
dc.subject ultraviolet: galaxies en_US
dc.title The ultraviolet upturn in brightest cluster galaxies en_US
dc.type Article en_US

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