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Date and Time of the Query: 2019-07-22 T01:01:09 PDT
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For refcode 1988AJ.....95...15T:
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Copyright by American Astronomical Society. Reproduced by permission
1988AJ.....95...15T IS THE CORE OF THE COMA CLUSTER MORE MASSIVE THAN WE THOUGHT? LIH SIN THE AND SIMON D. M. WHITE Steward Observatory, University of Arizona, Tucson, Arizona 85721 Received 13 April 1987; revised 11 August 1987 ABSTRACT We investigate how the mass distribution and mass-to-light ratio of the Coma cluster are constrained by optical and x-ray observations. The x-ray data of Cowie, Henriksen, and Mushotzky (1987) suggest that the mass of the cluster core is higher than optical estimates based on the assumption that galaxies trace the mass. The x-ray data do not strongly constrain the mass distribution beyond 2h^-1^_50_ Mpc and are consistent both with a low total mass for the cluster and with a mass similar to the standard value. The low-mass model requires galaxies in the outer part of the cluster to be on near-circular orbits.
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