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DC Field | Value | Language |
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dc.contributor.author | Chaudhuri, Anya | - |
dc.contributor.author | Majumdar, Subhabrata | - |
dc.contributor.author | Nath, Biman B. | - |
dc.date.accessioned | 2014-08-26T07:47:08Z | - |
dc.date.available | 2014-08-26T07:47:08Z | - |
dc.date.issued | 2013-10-20 | - |
dc.identifier.citation | Astrophysical Journal, 2013, Vol. 776, p84 | en |
dc.identifier.issn | 0004-637X | - |
dc.identifier.issn | 1538-4357-(Online) | - |
dc.identifier.uri | http://hdl.handle.net/2289/5956 | - |
dc.description | Restricted Access. An open-access version is available at arXiv.org (one of the alternative locations) | en |
dc.description.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. | en |
dc.language.iso | en | en |
dc.publisher | IOP Publishing for the American Astronomical Society | en |
dc.relation.uri | http://adsabs.harvard.edu/abs/2013ApJ...776...84C | en |
dc.relation.uri | http://arxiv.org/abs/1211.3817 | en |
dc.relation.uri | http://dx.doi.org/10.1088/0004-637X/776/2/84 | en |
dc.rights | 2013 The American Astronomical Society | en |
dc.subject | Galaxies | en |
dc.subject | X-rays | en |
dc.title | Active galactic nucleus feedback and entropy injection in galaxy cluster cores | en |
dc.type | Article | en |
Appears in Collections: | Research Papers (A&A) |
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File | Description | Size | Format | |
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2013_APJ_776_84.pdf Restricted Access | Restricted Access | 699.43 kB | Adobe PDF | View/Open Request a copy |
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