THE X-RAY TEMPERATURE FUNCTION AND STRUCTURE OF CLUSTERS AT Z
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Under very general theoretical assumptions, the evolution of the space densityof clusters of galaxies is extremely sensitive to cosmological parameters. Themost straightforward method of exploiting this sensitivity is throughmeasurements of the Xray temperature function. We propose to measure thetemperatures and structure of a complete sample of clusters with a mean redshiftof z0.8. We will determine the density parameter to an accuracy better than 10per cent, including accounting for the high degree of substructure suspected ina large fraction of the clusters. If confirmed, this substructure would indicatethat we are starting to observe the epoch of massive cluster formation. truncated!, Please see actual data for full text [truncated!, Please see actual data for full text]
