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Is the core of the Coma cluster more massive than we thought?The paper investigates 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 et al. (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 2/h50 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.
Document ID
19880036051
Acquisition Source
Legacy CDMS
Document Type
Reprint (Version printed in journal)
External Source(s)
Authors
The, Lih Sin
(Arizona Univ. Tucson, AZ, United States)
White, Simon D. M.
(Steward Observatory Tucson, AZ, United States)
Date Acquired
August 13, 2013
Publication Date
January 1, 1988
Publication Information
Publication: Astronomical Journal
Volume: 95
ISSN: 0004-6256
Subject Category
Astrophysics
Accession Number
88A23278
Funding Number(s)
CONTRACT_GRANT: NAGW-763
Distribution Limits
Public
Copyright
Other

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