IAU02312
Presentation type requested: ORAL
X-RAY EMISSION FROM CLUSTERS OF GALAXIES
Richard Mushotzky
Goddard Space Flight Center

X-ray observations of groups and clusters of galaxies indicates that most of the baryons and most of the metals in clusters and groups lies in the hot x-ray emitting IGM . X-ray surveys have detected clusters to z~1.3 and have constrained the evolution of clusters over a wide luminosity and redshift range. Many of the cosmological parameters can be constrained from these surveys. Spatially resolved x-ray spectra have determined the form of the dark matter potential over the mass scale from 10^13-3x10^15 M. Comparison of lensing, optical,x-ray and Sunyzev-Zeldovich observations have allowed robust tests of the general scenario of structure formation . Comparison of the entropy in groups and clusters with theoretical models place strong constraints on theories of galaxy and star formation

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