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The Astrophysical Journal
Article . 2009 . Peer-reviewed
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https://doi.org/10.1063/1.3475...
Article . 2010 . Peer-reviewed
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Article . 2009
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Supermodel Analysis of Galaxy Clusters

Authors: Roberto Fusco-Femiano; Alfonso Cavaliere; Andrea Lapi; A. Comastri; L. Angelini; M. Cappi;

Supermodel Analysis of Galaxy Clusters

Abstract

[abridged] We present the analysis of the X-ray brightness and temperature profiles for six clusters belonging to both the Cool Core and Non Cool Core classes, in terms of the Supermodel (SM) developed by Cavaliere, Lapi & Fusco-Femiano (2009). Based on the gravitational wells set by the dark matter halos, the SM straightforwardly expresses the equilibrium of the IntraCluster Plasma (ICP) modulated by the entropy deposited at the boundary by standing shocks from gravitational accretion, and injected at the center by outgoing blastwaves from mergers or from outbursts of Active Galactic Nuclei. The cluster set analyzed here highlights not only how simply the SM represents the main dichotomy Cool vs. Non Cool Core clusters in terms of a few ICP parameters governing the radial entropy run, but also how accurately it fits even complex brightness and temperature profiles. For Cool Core clusters like A2199 and A2597, the SM with a low level of central entropy straightforwardly yields the characteristic peaked profile of the temperature marked by a decline toward the center, without requiring currently strong radiative cooling and high mass deposition rates. Non Cool Core clusters like A1656 require instead a central entropy floor of a substantial level, and some like A2256 and even more A644 feature structured temperature profiles that also call for a definite floor extension; in such conditions the SM accurately fits the observations, and suggests that in these clusters the ICP has been just remolded by a merger event, in the way of a remnant cool core. The SM also predicts that dark matter halos with high concentration should correlate with flatter entropy profiles and steeper brightness in the outskirts; this is indeed the case with A1689.

12 pages, 11 figures, uses RevTeX4 + emulateapj.cls and apjfonts.sty. Accepted by ApJ

Country
Italy
Keywords

Active galaxies; Inductively coupled plasma ;Entropy; Brightness; Dark matter; Plasma materials processing; Galaxy clusters, Halo; Plasma deposition; Cluster analysis, Cosmology and Nongalactic Astrophysics (astro-ph.CO), galaxies: clusters: general ; galaxies: clusters: individual: A2199,A2597,A1689,A2256,A644; X-rays: galaxies: clusters, FOS: Physical sciences, Settore FIS/05 - ASTRONOMIA E ASTROFISICA, Astrophysics - Cosmology and Nongalactic Astrophysics

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selected citations
These citations are derived from selected sources.
This is an alternative to the "Influence" indicator, which also reflects the overall/total impact of an article in the research community at large, based on the underlying citation network (diachronically).
BIP!Citations provided by BIP!
popularity
This indicator reflects the "current" impact/attention (the "hype") of an article in the research community at large, based on the underlying citation network.
BIP!Popularity provided by BIP!
influence
This indicator reflects the overall/total impact of an article in the research community at large, based on the underlying citation network (diachronically).
BIP!Influence provided by BIP!
impulse
This indicator reflects the initial momentum of an article directly after its publication, based on the underlying citation network.
BIP!Impulse provided by BIP!
18
Average
Average
Top 10%
Green
gold