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We study the thermodynamic properties of the hot gas in a sample of groups in the 0.012-0.024 redshift range, using XMM-Newton observations. We present measurements of temperature, entropy, pressure and iron abundance. Non-parametric fits…

Astrophysics · Physics 2009-11-11 A. Finoguenov , T. J. Ponman , J. P. F. Osmond , M. Zimer

(Abridged) We examine the radial entropy distribution and its scaling using 31 nearby galaxy clusters from the Representative XMM-Newton Cluster Structure Survey (REXCESS). The entropy profiles are robustly measured at least out to R_1000…

Cosmology and Nongalactic Astrophysics · Physics 2014-09-22 G. W. Pratt , M. Arnaud , R. Piffaretti , H. Boehringer , T. J. Ponman , J. H. Croston , G. M. Voit , S. Borgani , R. G. Bower

Using XMM-Newton spatially resolved X-ray imaging spectroscopy we obtain the temperature, density, entropy, gas mass, and total mass profiles for two groups of galaxies out to ~0.3 Rvir (Rvir, the virial radius). Our density profiles agree…

Astrophysics · Physics 2007-05-23 R. Mushotzky , E. Figueroa-Feliciano , M. Loewenstein , S. L. Snowden

We carry out a two-dimensional study of temperature, entropy and pressure distributions in a nearly volume-limited subsample of REFLEX clusters at redshift 0.3, the REFLEX-DXL. We use the observations gained by XMM-Newton, which cover the…

Astrophysics · Physics 2009-11-11 A. Finoguenov , H. Boehringer , Y. Zhang

We present joint South Pole Telescope (SPT) and XMM-Newton observations of 8 massive galaxy clusters (0.8--1.7$\times$10$^{15}$ M$_{\odot}$) spanning a redshift range of 0.16 to 0.35. Employing a novel SZ+X-ray fitting technique, we…

We present a study of the structural and scaling properties of the gas distributions in the intracluster medium (ICM) of 31 nearby (z < 0.2) clusters observed with XMM-Newton, which together comprise the Representative XMM-Newton Cluster…

(abridged) We present a statistical analysis of 28 nearby galaxy groups from the Two-Dimensional XMM-Newton Group Survey (2dXGS). We focus on entropy and the role of feedback, dividing the sample into cool core (CC) and non cool core (NCC)…

Cosmology and Nongalactic Astrophysics · Physics 2009-11-13 Ria Johnson , Trevor J. Ponman , Alexis Finoguenov

We present the results of the 2-dimensional XMM-Newton Group Survey (2dXGS), an archival study of nearby galaxy groups. In this paper we consider eleven nearby systems (z<0.012) in Mulchaey et al. (2003), which span a broad range in X-ray…

Astrophysics · Physics 2011-02-11 Alexis Finoguenov , David S. Davis , Marc Zimer , John S. Mulchaey

We characterise the entropy profiles of 32 very high mass ($M_{500}>7.75\times10^{14}~M_{\odot}$) galaxy clusters (HIGHMz), selected from the CHEX-MATE sample, to study the intracluster medium (ICM) entropy distribution in a regime where…

Galaxy clusters are the most recent products of hierarchical accretion over cosmological scales. The gas accreted from the cosmic field is thermalized inside the cluster halo. Gas entropy and pressure are expected to have a self-similar…

Cosmology and Nongalactic Astrophysics · Physics 2017-08-23 V. Ghirardini , S. Ettori , S. Amodeo , R. Capasso , M. Sereno

(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

We have undertaken a multiwavelength project to study the relatively unknown properties of groups and poor clusters of galaxies at intermediate redshifts. In this paper, we describe the XMM-Newton observations of six X-ray selected groups…

Astrophysics · Physics 2008-11-26 T. E. Jeltema , J. S. Mulchaey , L. M. Lubin , P. Rosati , H. Bohringer

We investigate temperature and entropy profiles of 13 nearby cooling flow clusters observed with the EPIC cameras of XMM-Newton. When normalized and scaled by the virial radius the temperature profiles turn out to be remarkably similar. At…

Astrophysics · Physics 2009-11-10 Rocco Piffaretti , Philippe Jetzer , Jelle Kaastra , Takayuki Tamura

[Abridged] The entropy distribution of the intracluster gas reflects both accretion history of the gas and processes of feedback which provide a further non-gravitational energy besides the potential one. In this work, we study the profiles…

Astrophysics · Physics 2009-11-13 A. Morandi , S. Ettori

Galaxy clusters are thought to grow hierarchically through the continuous merging and accretion of smaller structures across cosmic time. In the local Universe, these phenomena are still active in the outer regions of massive clusters…

Cosmology and Nongalactic Astrophysics · Physics 2017-05-10 D. Eckert , S. Ettori , E. Pointecouteau , S. Molendi , S. Paltani , C. Tchernin

Using XMM-Newton observations, we investigate the scaling and structural properties of the ICM entropy in a sample of 10 nearby (z < 0.2) relaxed galaxy clusters in the temperature range 2-9 keV. We derive the local entropy-temperature…

Astrophysics · Physics 2009-11-13 G. W. Pratt , M. Arnaud , E. Pointecouteau

We report on the results of XMM-Newton observations of the z=0.18 galaxy group WARPJ0943.7+1644 and the nearby poor cluster WARPJ0943.5+1640 at z=0.256. Tracing the X-ray gas out to ~425h^(-1) and ~500h^(-1) kpc in the two systems,…

Astrophysics · Physics 2009-11-10 Jesper Rasmussen , Trevor J. Ponman

We describe the ROSAT All-Sky Survey-Center for Astrophysics Loose Systems (RASSCALS), the largest X-ray and optical survey of low mass galaxy groups to date. We draw 260 groups from the combined Center for Astrophysics and Southern Sky…

Astrophysics · Physics 2009-10-31 A. Mahdavi , H. Boehringer , M. J. Geller , M. Ramella

An XMM-Newton observation of the cool (kT=2.1 keV) cluster A1983, at z=0.044, is presented. Gas density and temperature profiles are calculated for the inner 500 h_{50}^{-1} kpc (~0.35 r_200). The outer regions of the surface brightness…

Astrophysics · Physics 2009-11-07 G. W. Pratt , M. Arnaud

We present XMM-Newton results on the spatially resolved temperature profiles of eight massive galaxy clusters of a volume-limited sample at redshifts $z\sim0.3$ (REFLEX-DXL sample) and an additional luminous cluster at $z=0.2578$, selected…

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