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|Title: ||Energy deposition pro les and entropy in galaxy clusters|
|Authors: ||Chaudhuri, Anya|
Nath, Biman B.
|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: ||Restricted Access. An open-access version is available at arXiv.org (one of the alternative locations)|
|Alternative Location: ||http://adsabs.harvard.edu/abs/2012ApJ...759...87C|
|Copyright: ||2012 The American Astronomical Society|
|Appears in Collections:||Research Papers (A&A)|
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