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Related papers: Intracluster Medium Entropy Profiles for a Chandra…

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We report properties of the intracluster medium (ICM) in Abell~1246 to the virial radius ($r_{200}$) and further outside as observed with Suzaku. The ICM emission is clearly detected to $r_{200}$, and we derive profiles of electron…

Cosmology and Nongalactic Astrophysics · Physics 2015-06-19 K. Sato , K. Matsushita , N. Y. Yamasaki , S. Sasaki , T. Ohashi

Our current knowledge of the thermodynamic properties of galaxy clusters comes primarily from detailed studies of clusters selected by their minority components: hot baryons. Most of these studies select the clusters using the component…

Cosmology and Nongalactic Astrophysics · Physics 2025-01-15 S. Andreon , M. Radovich , A. Moretti , F. -X. Desert , T. Hamana , M. Pizzardo , C. Romero , H. Roussel , G. Trinchieri

We take up from a library of 12 galaxy clusters featuring extended X-ray observations of their Intra Cluster Plasma (ICP), analyzed with our entropy-based Supermodel. Its few intrinsic parameters - basically, the central level and the outer…

Cosmology and Nongalactic Astrophysics · Physics 2015-05-30 A. Cavaliere , A. Lapi , R. Fusco-Femiano

We study the impact of an intracluster magnetic field on the main structural properties of clusters and groups of galaxies: the radial density and entropy profiles, the S-T relation and the L_X-T relation for groups and clusters of…

Astrophysics · Physics 2009-11-13 S. Colafrancesco , F. Giordano

The average mass density profile measured in the CNOC cluster survey is well described with the analytic form rho(r)=A/[r(r+a_rho)^2], as advocated on the basis on n-body simulations by Navarro, Frenk & White. The predicted core radii are…

We examine the reconstruction of galaxy cluster radial density profiles obtained from Chandra and XMM X-ray observations, using high quality data for a sample of twelve objects covering a range of morphologies and redshifts. By comparing…

Cosmology and Nongalactic Astrophysics · Physics 2017-12-13 I. Bartalucci , M. Arnaud , G. W. Pratt , A. Vikhlinin , E. Pointecouteau , W. R. Forman , C. Jones , P. Mazzotta , F. Andrade-Santos

We present the X-ray properties and scaling relations of a large sample of clusters extracted from the Marenostrum MUltidark SImulations of galaxy Clusters (MUSIC) dataset. We focus on a sub-sample of 179 clusters at redshift z~0.11, with…

Cosmology and Nongalactic Astrophysics · Physics 2014-03-05 Veronica Biffi , Federico Sembolini , Marco De Petris , Riccardo Valdarnini , Gustavo Yepes , Stefan Gottlöber

The analysis of X-ray and Sunyaev-Zel\'dovich measurements of the intracluster medium (ICM) assumes that electrons are in thermal equilibrium with ions in the plasma. However, electron-ion equilibration timescales can be comparable to the…

Cosmology and Nongalactic Astrophysics · Physics 2015-08-20 Camille Avestruz , Daisuke Nagai , Erwin T. Lau , Kaylea Nelson

The utility of large Sunyaev Zel'dovich (SZ) surveys for determining cosmological parameters from cluster abundances is limited by the theoretical uncertainties in the integrated SZ-flux-to-mass relation, Y-M. We explore how non-thermal…

Cosmology and Nongalactic Astrophysics · Physics 2015-05-30 N. Battaglia , J. R. Bond , C. Pfrommer , J. L. Sievers

I propose an explanation to the finding that star formation and visible filaments strong in Halpha emission in cooling flow clusters occur only if the minimum specific entropy and the radiative cooling time of the intracluster medium (ICM),…

Astrophysics · Physics 2009-11-13 Noam Soker

Modern hydrodynamical simulations offer nowadays a powerful means to trace the evolution of the X-ray properties of the intra-cluster medium (ICM) during the cosmological history of the hierarchical build up of galaxy clusters. In this…

Astrophysics · Physics 2009-11-13 S. Borgani , A. Diaferio , K. Dolag , S. Schindler

In this paper we investigate how convective instabilities influence heat conduction in the intracluster medium (ICM) of cool-core galaxy clusters. The ICM is a high-beta, weakly collisional plasma in which the transport of momentum and heat…

Cosmology and Nongalactic Astrophysics · Physics 2015-06-04 Henrik N. Latter , Matthew W. Kunz

(Abridged) We present an analysis of the mass and entropy profiles of three poor clusters (A1991, A2717 and MKW9) observed with XMM-Newton. The clusters have similar temperatures (kT=2.65, 2.53 and 2.58 keV), and similar redshifts (0.04 < z…

Astrophysics · Physics 2009-11-10 G. W. Pratt , M. Arnaud

X-ray observations of galaxy clusters potentially provide powerful cosmological probes if systematics due to our incomplete knowledge of the intracluster medium (ICM) physics are understood and controlled. In this paper, we study the…

Astrophysics · Physics 2015-06-24 Daisuke Nagai , Andrey V. Kravtsov , Alexey Vikhlinin

We present results from high-resolution Tree+SPH simulations of galaxy clusters and groups, aimed at studying the effect of non-gravitational heating on the entropy of the ICM. We simulate three systems, having emission-weighted temperature…

Astrophysics · Physics 2009-11-07 S. Borgani , F. Governato , J. Wadsley , N. Menci , P. Tozzi , G. Lake , T. Quinn , J. Stadel

Many recent models consider the structure of individual interstellar medium (ISM) clouds as a way to explain observations of large parts of galaxies. To compare such models to observations, one must understand how to translate between…

Cosmology and Nongalactic Astrophysics · Physics 2015-06-15 Adam K. Leroy , Cheoljong Lee , Andreas Schruba , Alberto Bolatto , Annie Hughes , Jerome Pety , Karin Sandstrom , Eva Schinnerer , Fabian Walter

We calculate X-ray properties of present-day galaxy clusters from hydrodynamical cosmological simulations of the LCDM cosmology and compare these with recent X-ray observations. Results from three simulations are presented, each of which…

Astrophysics · Physics 2009-11-07 Orrarujee Muanwong , Peter A. Thomas , Scott T. Kay , Frazer R. Pearce

The diffuse starlight extending throughout massive galaxy clusters, known as intracluster light (ICL), has the potential to be read as a memoir of mass accretion: informative, individual, and yet imperfect. Here, we combine dark matter-only…

Astrophysics of Galaxies · Physics 2025-12-05 Tara Dacunha , Phil Mansfield , Risa Wechsler

The hot Intra-Cluster Medium (ICM) in clusters of galaxies is a very large repository of metals produced by supernovae. We aim to accurately measure the abundances in the ICM of many clusters and compare these data with metal yields…

Astrophysics · Physics 2007-05-23 J. de Plaa , N. Werner , J. A. M. Bleeker , Jacco Vink , J. S. Kaastra , M. Mendez