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Evolution in cluster cores since z ~ 1

Published online by Cambridge University Press:  17 July 2013

Claire Burke ,
Chris Collins ,
John Stott  and
Matt Hilton
Claire Burke
Affiliation:
Astrophysics Research Institute, Liverpool John Moores University, UK. email: [email protected]
Chris Collins
Affiliation:
Astrophysics Research Institute, Liverpool John Moores University, UK. email: [email protected]
John Stott
Affiliation:
Extragalactic & Cosmology Group, Durham University, UK.
Matt Hilton
Affiliation:
Astrophysics & Cosmology Research Unit, University of KwaZulu-Natal, South Africa.
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Abstract

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A large fraction of the stellar mass in galaxy clusters is thought to be contained in the diffuse low surface brightness intracluster light (ICL). Being bound to the gravitational potential of the cluster rather than any individual galaxy, the ICL contains much information about the evolution of its host cluster and the interactions between the galaxies within. However due its low surface brightness it is notoriously difficult to study. We present the first detection and measurement of the flux contained in the ICL at z ~ 1. We find that the fraction of the total cluster light contained in the ICL may have increased by factors of 2–4 since z ~ 1, in contrast to recent findings for the lack of mass and scale size evolution found for brightest cluster galaxies. Our results suggest that late time build-up in cluster cores may occur more through stripping than merging and we discuss the implications of our results for hierarchical simulations.

Keywords

galaxies: clusters: generalgalaxies: elliptical and lenticularcDgalaxies: evolutiongalaxies: halosgalaxies: interactions
Type
Contributed Papers
Information
Proceedings of the International Astronomical Union , Volume 8 , Symposium S295: The intriguing life of massive galaxies , August 2012 , pp. 172 - 173
Copyright
Copyright © International Astronomical Union 2013 

References

Burke, C., et al. 2012, MNRAS, 425, 2058Google Scholar
De Lucia, G. & Blaizot, J. 2007, MNRAS, 375, 2Google Scholar
Stott, J. P., et al. 2011, MNRAS, 414, 445Google Scholar