Please use this identifier to cite or link to this item:
http://hdl.handle.net/2289/5956
Title: | Active galactic nucleus feedback and entropy injection in galaxy cluster cores |
Authors: | Chaudhuri, Anya Majumdar, Subhabrata Nath, Biman B. |
Keywords: | Galaxies X-rays |
Issue Date: | 20-Oct-2013 |
Publisher: | IOP Publishing for the American Astronomical Society |
Citation: | Astrophysical Journal, 2013, Vol. 776, p84 |
Abstract: | We make the first estimate of non-gravitational energy profiles in galaxy cluster cores (and beyond) based on observational data. Comparing the observed entropy profiles within r 500, from the Representative XMM-Newton Cluster Structure Survey to simulated base entropy profiles without feedback from both adaptive mesh refinement (AMR) and smoothed particle hydrodynamic (SPH) non-radiative simulations, we estimate the amount of additional non-gravitational energy, E ICM, contained in the intracluster medium (ICM), as well as the total energy feedback, E Feedback, from active galactic nuclei (AGNs; the central AGNs in most cases) into the clusters. The total feedback energy scales with the mean spectroscopic temperature as $E_{\rm Feedback} \propto T_{\rm sp}^{2.52 \pm 0.08}$ and $E_{\rm Feedback} \propto T_{\rm sp}^{2.17 \pm 0.11}$ for the SPH and AMR baseline profiles. The mean non-gravitational energy per particle within r 500 remaining in the ICM after energy lost during cooling is epsilonICM = 2.8 ± 0.8 keV for the SPH theoretical relation and epsilonICM = 1.7 ± 0.9 keV for the AMR theoretical relation. We use the NRAO/VLA Sky Survey source catalog to determine the radio luminosity, LR , at 1.4 GHz of the central source(s) of our sample. For T sp > 3 keV, the E Feedback correlates with LR , although with different normalization for cool-core and non-cool-core clusters. We show that AGNs could provide a significant portion of the feedback. |
Description: | Restricted Access. An open-access version is available at arXiv.org (one of the alternative locations) |
URI: | http://hdl.handle.net/2289/5956 |
ISSN: | 0004-637X 1538-4357-(Online) |
Alternative Location: | http://adsabs.harvard.edu/abs/2013ApJ...776...84C http://arxiv.org/abs/1211.3817 http://dx.doi.org/10.1088/0004-637X/776/2/84 |
Copyright: | 2013 The American Astronomical Society |
Appears in Collections: | Research Papers (A&A) |
Files in This Item:
File | Description | Size | Format | |
---|---|---|---|---|
2013_APJ_776_84.pdf Restricted Access | Restricted Access | 699.43 kB | Adobe PDF | View/Open Request a copy |
Items in RRI Digital Repository are protected by copyright, with all rights reserved, unless otherwise indicated.