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einstein observations of the hydra a cluster and the efficiency of galaxy formation in groups and clustersThe Einstein imaging proportional counter observations of the poor cluster of galaxies centered on the radio galaxy Hydra A are examined. From the surface brightness profile, it is found that the X-ray-emitting gas in the Hydra A cluster must be condensing out of the intracluster medium at a rate of 600 solar masses/yr. This is one of the largest mass deposition rates observed in a cluster of galaxies. The ratio of gas mass to stellar mass is compared for a variety of systems, showing that this ratio correlates with the gas temperature.
Document ID
19900049574
Document Type
Reprint (Version printed in journal)
External Source(s)
Authors
David, L. P.
(Smithsonian Astrophysical Observatory Cambridge, MA, United States)
Arnaud, K. A.
(Smithsonian Astrophysical Observatory Cambridge, MA, United States)
Forman, W.
(Smithsonian Astrophysical Observatory Cambridge, MA, United States)
Jones, C.
(Smithsonian Astrophysical Observatory Cambridge, MA, United States)
Date Acquired
August 14, 2013
Publication Date
June 10, 1990
Publication Information
Publication: Astrophysical Journal, Part 1
Volume: 356
ISSN: 0004-637X
Subject Category
ASTROPHYSICS
Funding Number(s)
CONTRACT_GRANT: NAS8-30751
Distribution Limits
Public
Copyright
Other