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

We have performed a combined analysis of X-ray and Sunyaev-Zel'dovich data in the direction of the dis- tant galaxy cluster, RX J2228+2037. Fitting a-model to the high-resolution HRI data givesrc = 10312h 1 70 kpc and =0 :54 0:03. The dependency of the Sunyaev-Zel'dovich eect with respect to the gas temperature al- lows us, through the additional use of the 21 GHz data of the cluster, to determine kBTe =1 0:4 1:8h 1=2 70 keV. Extrapolating the gas density prole out to the virial radius (Rv = r178 =2 :9 Mpc), we derived a gas mass of

[1]  Etienne Pointecouteau,et al.  A Sunyaev-Zeldovich Map of the Massive Core in the Luminous X-Ray Cluster RX J1347–1145 , 1999 .

[2]  M. Malkan,et al.  The WARPS survey - IV. The X-ray luminosity-temperature relation of high-redshift galaxy clusters , 2000, astro-ph/0003324.

[3]  Galaxy Cluster Gas Mass Fractions from Sunyaev-Zeldovich Effect Measurements: Constraints on ΩM , 2000, astro-ph/0012067.

[4]  T. Boller,et al.  The Hamburg/RASS Catalogue of optical identifications , 1998 .

[5]  G. Bryan,et al.  Statistical Properties of X-Ray Clusters: Analytic and Numerical Comparisons , 1997, astro-ph/9710107.

[6]  E. Greisen,et al.  The NRAO VLA Sky Survey , 1996 .

[7]  J. Dickey,et al.  H I in the Galaxy , 1990 .

[8]  Makoto Hattori,et al.  Substructures Revealed by the Sunyaev–Zel’dovich Effect at 150 GHz in a High-Resolution Map of RX J1347$-$1145 , 2001 .

[9]  J. P. Huchra,et al.  The ROSAT Brightest Cluster Sample - IV. The extended sample , 2000 .

[10]  E. Pointecouteau,et al.  Extended Sunyaev-Zeldovich Map of the Most Luminous X-Ray Cluster, RX J1347–1145 , 2000, astro-ph/0012309.

[11]  S. Allen,et al.  Chandra observations of the galaxy cluster Abell 1835 , 2001, astro-ph/0107311.

[12]  Monique Arnaud,et al.  The LX—T relation and intracluster gas fractions of X-ray clusters , 1999 .

[13]  D. Neumann.  3C 295, a cluster and its cooling flow at z=0.46 , 1999, astro-ph/9902035.

[14]  H. Boehringer,et al.  X-ray properties of the distant cluster Cl0016 + 16 , 1996, astro-ph/9607063.

[15]  G. A. Croes,et al.  FITS++: An Object-Oriented Set of C++ Classes to Support FITS , 1997 .

[16]  H. Böhringer,et al.  A Detailed Analysis of the Dynamical State of the Cluster of Galaxies A2218 in X-Rays , 1999 .

[17]  M. Birkinshaw,et al.  The Sunyaev-Zel’dovich Effect , 1998, astro-ph/9808050.

[18]  J. P. Huchra,et al.  The Northern ROSAT All-Sky (NORAS) Galaxy Cluster Survey. I. X-Ray Properties of Clusters Detected as Extended X-Ray Sources , 2000, astro-ph/0003219.