SZ and X-ray combined analysis of a distant galaxy cluster, RX J2228+2037

Details SZ and X-ray combined analysis of a distant galaxy cluster, RX J2228+2037 SZ and X-ray combined analysis of a distant galaxy cluster, RX J2228+2037

2002-03-18

arxiv.org/abs/astro-ph/0203268v1

Astronomy and Astrophysics

Astrophysics

7 pages, 4 figures, accepted for publication in A&A

Scientific paper

10.1051/0004-6361:20020394

We have performed a combined analysis of X-ray and Sunyaev-Zel'dovich data in the direction of the distant galaxy cluster, RX J2228+2037. Fitting a $\beta$-model to the high-resolution HRI data gives $r_c = 103 \pm 12 h_{70}^{-1}$ kpc and $\beta=0.54 \pm 0.03$. The dependency of the Sunyaev-Zel'dovich effect with respect to the gas temperature allows us, through the additional use of the 21 GHz data of the cluster, to determine $k_B T_e=10.4 \pm 1.8 h_{70}^{1/2}$ keV. Extrapolating the gas density profile out to the virial radius ($R_v=r_{178}=2.9$ Mpc), we derived a gas mass of $M_{g}(r

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