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The Intergalactic Medium

Published online by Cambridge University Press:  30 March 2016

George B. Field
George B. Field*
Affiliation:
Harvard-Smithsonian Center for Astrophysics

Extract

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Observations of Lyman-α absorption show that any gas present in the space between clusters of galaxies must be hot, and x-ray observations indicate that there may be present gas whose temperature at low redshifts is 4 × 108 K and whose density is about half the critical value for cosmology. The interpretation of these observations is reviewed, and difficulties with proposed heating mechanisms are emphasized.

Type
Joint Discussion
Information
Highlights of Astronomy , Volume 5: Highlights of Astronomy. As presented at the XVIIth General Assembly of the IAU, 1979 , 1980 , pp. 375 - 386
Copyright
Copyright © Cambridge University Press 1980

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