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X-Ray Halos in Galaxies and Clusters of Galaxies: Theory

  • Craig L. Sarazin (a1)

Abstract

X-ray measurements provide an excellent method to determine the amount and distribution of the dark matter in clusters. Unfortunately, accurate temperature profiles, necessary to this method, are currently not available. However, if the intracluster gas is assumed to have a monotonically decreasing temperature, one finds that the dark matter is strongly concentrated to the cluster center, and has a mass which only exceeds the known baryonic mass by a factor of about three. On a second topic, cooling flows are shown to be a very common feature of cluster central and normal elliptical galaxies. The cooling gas is probably ultimately converted into low mass stars.

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X-Ray Halos in Galaxies and Clusters of Galaxies: Theory

  • Craig L. Sarazin (a1)

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