Astronomy and Astrophysics – Astronomy
Scientific paper
Jul 2010
adsabs.harvard.edu/cgi-bin/nph-data_query?bibcode=2010aipc.1248..291f&link_type=abstract
X-RAY ASTRONOMY 2009; PRESENT STATUS, MULTI-WAVELENGTH APPROACH AND FUTURE PERSPECTIVES: Proceedings of the International Confer
Astronomy and Astrophysics
Astronomy
Clusters Of Galaxies, Brightness, Dark Matter, Galactic Nuclei, Accretion Disks, Galaxy Clusters, Luminosity And Mass Functions, Dark Matter, Galactic Nuclei, Circumnuclear Matter, And Bulges, Accretion And Accretion Disks
Scientific paper
We present the analysis of the X-ray brightness and temperature profiles for six clusters belonging to both the Cool Core (CC) and Non Cool Core (NCC) classes, in terms of the Supermodel (SM) developed by Cavaliere, Lapi & Fusco-Femiano (2009, ApJ, 698, 580; CLFF09). Based on the gravitational wells set by the dark matter halos, the SM straightforwardly expresses the equilibrium of the IntraCluster Plasma (ICP) modulated by 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 AGNs. For CC clusters like A2199 and A2597, the SM with a low level of central entropy yields the characteristic peaked profile of the temperature declining toward the center without to require radiative cooling. NCC clusters like A1656, A2256 and A644 require instead a central entropy floor to explain the central flat brightness distribution and for A2256 and A644 also the very structured temperature profiles. The SM accurately fit the observations, and suggests that in these two clusters a merger event has partially erased any cool core condition and yields a nascent NCC. Focusing on the cold component, such cases may be rendered as RCCs for Remnant Cool Core. The SM also predicts that highly concentrated DM halos should imply flatter entropy profiles and steeper brightness in the outskirts; this is indeed the case with A1689, for which from X rays we find concentration values c~10, hallmark of an early formation.
Cavaliere Alfonso
Fusco-Femiano Roberto
Lapi Andrea
No associations
LandOfFree
Supermodel Analysis of Galaxy Clusters does not yet have a rating. At this time, there are no reviews or comments for this scientific paper.
If you have personal experience with Supermodel Analysis of Galaxy Clusters, we encourage you to share that experience with our LandOfFree.com community. Your opinion is very important and Supermodel Analysis of Galaxy Clusters will most certainly appreciate the feedback.
Profile ID: LFWR-SCP-O-1644770