Volume 489, Number 1, October I 2008
|Page(s)||1 - 9|
|Section||Cosmology (including clusters of galaxies)|
|Published online||23 July 2008|
XMM-Newton studies of a massive cluster of galaxies: RXC J2228.6+2036
Max-Planck-Institut für extraterrestrische Physik, 85748 Garching, Germany
2 Key Laboratory of Particle Astrophysics, Institute of High Energy Physics, Chinese Academy of Sciences, Beijing 100049, PR China
3 CESR-CNRS, 9 Av. du Colonel Roche, 31028 Toulouse, France
4 Argelander-Institut für Astronomie, Rheinische Friedrich-Wilhelms-Universität Bonn, Auf dem Huegel 71, 53121 Bonn, Germany
Accepted: 6 June 2008
We present the X-ray properties of a massive cluster of galaxies (RXC J2228.6+2036 at ) using XMM-Newton data. The X-ray mass modeling is based on the temperature and density distributions of the intracluster medium derived using a deprojection method. We find that RXC J2228.6+2036 is a hot cluster ( keV) showing a cooling flow rate of yr-1 based on spectral fitting within the cooling flow radius (rcool = 147±10 kpc). The total cluster mass is M500 = (1.19±0.35)1015 and the mean gas mass fraction is fgas = 0.165±0.045 at r500 = 1.61±0.16 Mpc. We discuss the PSF-correction effect on the spectral analysis and find that, for the selected annular width, the PSF-corrected temperatures are consistent with those without PSF-correction. We observe remarkable agreement between X-ray and SZ results, which is of prime importance for future SZ surveys. RXC J2228.6+2036 obeys the empirical scaling relations found in general massive galaxy clusters (e.g. S–T, M–T, L–T and M–Y), after accounting for self-similar evolution.
Key words: galaxies: clusters: individual: RXC J2228.6+2036 / X-rays: galaxies: clusters
© ESO, 2008
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