Properties of the intra cluster medium at high redshift

Details Properties of the intra cluster medium at high redshift Properties of the intra cluster medium at high redshift

Jun 2004

adsabs.harvard.edu/cgi-bin/nph-data_query?bibcode=2004nuphs.132...48t&link_type=abstract

Nuclear Physics B Proceedings Supplements, Volume 132, p. 48-53.

Physics

Nuclear Physics

Scientific paper

We analyze the X-ray properties of the most distant clusters of galaxies (0.3=0.8 is ZFe=0.25+0.04-0.06Zsolar, and at ~1.2 is ZFe=0.35+0.06-0.05Zsolar (5 clusters at z>1), both measures consistent with the local value ZFe~=0.3Zsolar, within 1σconfidence level, thus suggesting no evolution of the mean iron abundance out to z~=1.3. The X-ray scaling properties show hints of negative evolution in the Lbol-T and Mgas-T relations, and a positive evolution in the Entropy-T relation. Together, these results can provide interesting constraints on the thermodynamics of the ICM at large lookback times, pointing towards a redshift z>~2 for the onset of non-gravitational processes.

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