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Cosmological Information from X-Ray Observations

Published online by Cambridge University Press:  07 February 2017

Herbert Gursky
Herbert Gursky*
Affiliation:
Center for Astrophysics Smithsonian Astrophysical Observatory/Harvard College Observatory Cambridge, Massachusetts 01776, USA

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The fact that x-ray astronomy could yield cosmological information was apparent in the earliest rocket flights carried out in 1962 and 1963 (Giacconi et al, 1962, Bowyer et al, 1963). These flights established that diffuse radiation was present around the sky; indeed one of the first theoretical papers commenting on the x-ray results was by Fred Hoyle (1963) showing that the observed background flux was below that predicted for the hot, steady-state universe. A few years later, the first discrete source was credibly identified with an external galaxy (Byram, et al. 1966).

Type
IV. Observational Evidence for Cosmological Evolution
Information
Symposium - International Astronomical Union , Volume 79: The Large Scale Structure of the Universe , 1978 , pp. 327 - 337
Copyright
Copyright © Reidel 1978 

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