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Title: ENERGY DEPOSITION PROFILES AND ENTROPY IN GALAXY CLUSTERS

Abstract

We report the results of our study of fractional entropy enhancement in the intracluster medium (ICM) of the clusters from the representative XMM-Newton cluster structure survey. 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 cooling. We make the first estimate of the total, as well as radial, non-gravitational energy deposition up to r {sub 500} for this 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 cluster mass). The energy deposition per particle scaled by T {sub sp}, {Delta}E/T {sub sp} has a similar profile in all clusters, and is more pronounced in the central regions. Our results support models of entropy enhancement through active galactic nucleus feedback.

Authors:
;  [1];  [2]
  1. Tata Institute of Fundamental Research 1, Homi Bhabha Road, Mumbai 400005 (India)
  2. Raman Research Institute, Sadashiva Nagar, Bangalore 560080 (India)
Publication Date:
OSTI Identifier:
22086419
Resource Type:
Journal Article
Journal Name:
Astrophysical Journal
Additional Journal Information:
Journal Volume: 759; Journal Issue: 2; Other Information: Country of input: International Atomic Energy Agency (IAEA); Journal ID: ISSN 0004-637X
Country of Publication:
United States
Language:
English
Subject:
79 ASTROPHYSICS, COSMOLOGY AND ASTRONOMY; ASTRONOMY; ASTROPHYSICS; COMPARATIVE EVALUATIONS; COOLING; ENTROPY; FEEDBACK; GALAXY CLUSTERS; GALAXY NUCLEI; INTERSTELLAR SPACE; X-RAY GALAXIES

Citation Formats

Chaudhuri, Anya, Majumdar, Subhabrata, and Nath, Biman B., E-mail: anya@tifr.res.in, E-mail: subha@tifr.res.in, E-mail: biman@rri.res.in. ENERGY DEPOSITION PROFILES AND ENTROPY IN GALAXY CLUSTERS. United States: N. p., 2012. Web. doi:10.1088/0004-637X/759/2/87.
Chaudhuri, Anya, Majumdar, Subhabrata, & Nath, Biman B., E-mail: anya@tifr.res.in, E-mail: subha@tifr.res.in, E-mail: biman@rri.res.in. ENERGY DEPOSITION PROFILES AND ENTROPY IN GALAXY CLUSTERS. United States. doi:10.1088/0004-637X/759/2/87.
Chaudhuri, Anya, Majumdar, Subhabrata, and Nath, Biman B., E-mail: anya@tifr.res.in, E-mail: subha@tifr.res.in, E-mail: biman@rri.res.in. Sat . "ENERGY DEPOSITION PROFILES AND ENTROPY IN GALAXY CLUSTERS". United States. doi:10.1088/0004-637X/759/2/87.
@article{osti_22086419,
title = {ENERGY DEPOSITION PROFILES AND ENTROPY IN GALAXY CLUSTERS},
author = {Chaudhuri, Anya and Majumdar, Subhabrata and Nath, Biman B., E-mail: anya@tifr.res.in, E-mail: subha@tifr.res.in, E-mail: biman@rri.res.in},
abstractNote = {We report the results of our study of fractional entropy enhancement in the intracluster medium (ICM) of the clusters from the representative XMM-Newton cluster structure survey. 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 cooling. We make the first estimate of the total, as well as radial, non-gravitational energy deposition up to r {sub 500} for this 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 cluster mass). The energy deposition per particle scaled by T {sub sp}, {Delta}E/T {sub sp} has a similar profile in all clusters, and is more pronounced in the central regions. Our results support models of entropy enhancement through active galactic nucleus feedback.},
doi = {10.1088/0004-637X/759/2/87},
journal = {Astrophysical Journal},
issn = {0004-637X},
number = 2,
volume = 759,
place = {United States},
year = {2012},
month = {11}
}