HEAD 2000, November 2000
Session 18. Cluster Surveys/Galaxies
Oral, Tuesday, November 7, 2000, 1:00-2:30pm, Pago Pago Ballroom

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[18.01] Imaging the Sunyaev-Zeldovich Effect in Clusters of Galaxies


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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