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

Published online by Cambridge University Press:  04 August 2017

Craig L. Sarazin
Craig L. Sarazin*
Affiliation:
Department of Astronomy, University of Virginia, Charlottesville, VA 22903

Abstract

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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.

Type
Review Paper
Information
Symposium - International Astronomical Union , Volume 117: Dark Matter in the Universe , 1987 , pp. 183 - 199
Copyright
Copyright © Reidel 1987 

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