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28 March 2024
 
  » arxiv » astro-ph/0203268

 Article overview


SZ and X-ray combined analysis of a distant galaxy cluster, RX J2228+2037
E. Pointecouteau ; M. Hattori ; D.M. Neumann ; E. Komatsu ; H.Matsuo ; N. Kuno ; H. Bohringer ;
Date 18 Mar 2002
Subject astro-ph
AffiliationCESR-CNRS, Tohoku Univ.), M. Hattori (Tohoku Univ.), D.M. Neumann (SAp-CEA), E. Komatsu (Princeton Univ.), H.Matsuo (Mitaka Obs.), N. Kuno (Nobeyama Obs.), H. Bohringer (MPE
AbstractWe 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 $eta$-model to the high-resolution HRI data gives $r_c = 103 pm 12 h_{70}^{-1}$ kpc and $eta=0.54 pm 0.03$. 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
Source arXiv, astro-ph/0203268
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