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Title: Energy deposition pro les and entropy in galaxy clusters
Authors: Chaudhuri, Anya
Nath, Biman B.
Majumdar, Subhabrata
Keywords: X-rays
Issue Date: 10-Nov-2012
Publisher: IOP Publishing for the American Astronomical Society
Citation: Astrophysical Journal, 2012, Vol. 759, p87
Abstract: We report the results of our study of fractional entropy enhancement in the intra-cluster medium (ICM) of the clusters from the representative XMM-Newton cluster structure survey (REXCESS). We compare the observed entropy profile of these clusters with that expected for the ICM without any feedback, as well as with the introduction of preheating and entropy change due to gas cooling. We make the first estimate of the total, as well as radial, non-gravitational energy deposition up to r500 for a large, nearly flux-limited, sample of clusters. We find that the total energy deposition corresponding to the entropy enhancement is proportional to the cluster temperature (and hence mass), and that the energy deposition per particle as a function of gas mass shows a similar profile in all clusters, with its being more pronounced in the central region than in the outer region. Our results support models of entropy enhancement through AGN feedback
Description: Open-access
ISSN: 0004-637X
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Copyright: 2012 The American Astronomical Society, This article may be downloaded for personal use only. Any other use requires prior permission of the author and The American Astronomical Society
Appears in Collections:Research Papers (A&A)

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