Mathematics – Logic
Scientific paper
Oct 2000
adsabs.harvard.edu/cgi-bin/nph-data_query?bibcode=2000head....5.1801j&link_type=abstract
American Astronomical Society, HEAD Meeting #5, #18.01; Bulletin of the American Astronomical Society, Vol. 32, p.1209
Mathematics
Logic
Scientific paper
Sunyaev-Zeldovich Effect imaging capabilities have recently advanced to the point that high signal-to-noise measurements are available for numerous clusters of galaxies. We discuss the results of these S-Z observations, including measurements of the pressure distribution of the hot intracluster medium; the cluster gas mass and total mass can also be inferred via x-ray measurements of the gas temperature, resulting in significant constraints on the cluster baryon fraction and the cosmological mass density parameter. S-Z Effect measurements have been further combined with x-ray imaging data, including high resolution data recently obtained with the Chandra X-ray Observatory, to estimate cluster distances and to place independent constraints on the expansion rate of the universe. Future S-Z Effect survey instruments will also be discussed, which will provide powerful probes of cosmology by measuring the abundance of galaxy clusters at intermediate and high redshift.
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