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Date and Time of the Query: 2019-04-18 T06:55:55 PDT
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For refcode 2004A&A...428..757O:
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Copyright by European Southern Observatory (ESO). Reproduced by permission
2004A&A...428..757O A uniform X-ray analysis of 79 distant galaxy clusters with ROSAT and ASCA N. Ota and K. Mitsuda Received 14 April 2004 / Accepted 22 July 2004 We present a uniform analysis of the ROSAT HRI and the ASCA GIS/SIS data for 79 distant clusters of galaxies in the redshift range 0.1 < z < 0.82 to study the global structures of the intracluster medium. We have constructed an X-ray catalog consisting of the largest sample of clusters in the redshift range for which pointed X-ray observations were carried out with both the observatories. We determined the emission-weighted X-ray temperatures of the clusters with ASCA, while we studied surface brightness distribution with the ROSAT HRI utilizing the isothermal {beta} model. We investigated the statistical properties and trends for redshift evolution of the X-ray parameters including the temperature, the density profile of the intracluster gas and the gas-mass fraction within r_500_. We also present correlations of the cluster parameters with the X-ray temperature and with the core radius and compare them with the predictions of the self-similar model, from which we discuss the possible origin of the double structure discovered in the core radius distribution. Keywords: galaxies: clusters: general, galaxies: intergalactic medium, X-rays: galaxies, cosmology: observations, cosmology: dark matter, catalogs
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