X-ray Observations of Groups and Clusters – A Relic of the High Redshift Universe

Abstract

I review the evidence from clusters and groups of galaxies for 'relic' evidence of the high redshift universe. Contrary to the received wisdom, clusters are old. Their x-ray emitting intergalactic medium in massive clusters is a reservoir of metal and energy injection from the main epoch of star formation. There are strong indications that non-gravitational… (More)

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