XMM-Newton studies of a massive cluster of galaxies: RXCJ2228.6+2036

S. M. Jia; H. Boehringer; E. Pointecouteau; Y. Chen; Y. Y. Zhang

doi:10.1051/0004-6361:200809699

paper

XMM-Newton studies of a massive cluster of galaxies: RXCJ2228.6+2036

arXiv:0806.1575 · doi:10.1051/0004-6361:200809699

Abstract

We present the X-ray properties of a massive cluster of galaxies (RXCJ2228.6+2036 at $z = 0.421$ ) using {\it 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 found that RXCJ2228.6+2036 is a hot cluster ( $T_{500} = 8.9 2_{- 1.32}^{+ 1.78}$ keV) showing a cooling flow rate of $12. 0_{- 12.0}^{+ 56.0}$ M $_{⊙}$ yr $^{- 1}$ based on spectral fitting within the cooling flow radius ( $r_{coo l} = 147 \pm 10$ kpc). The total cluster mass is $M_{500} = (1.19 \pm 0.35) \times 1 0^{15}$ M $_{⊙}$ and the mean gas mass fraction is $f_{g a s} = 0.165 \pm 0.045$ at $r_{500} = 1.61 \pm 0.16$ Mpc. We discussed the PSF-correction effect on the spectral analysis and found that for the annular width we chose the PSF-corrected temperatures are consistent with those without PSF-correction. We observed a remarkable agreement between X-ray and SZ results, which is of prime importance for the future SZ survey. RXCJ2228.6+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.

arXiv comment10 pages, 14 figures

XMM-Newton studies of a massive cluster of galaxies: RXCJ2228.6+2036

Abstract

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