XMM-Newton studies of a massive cluster of galaxies: RXC J2228.6+2036

¹ Max-Planck-Institut für extraterrestrische Physik, 85748 Garching, Germany
e-mail: jiasm@ihep.ac.cn
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

Received: 3 March 2008
Accepted: 6 June 2008

Abstract

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 (r_cool = 147±10 kpc). The total cluster mass is M₅₀₀ = (1.19±0.35)10¹⁵ and the mean gas mass fraction is f_gas = 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.