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High Energy Astrophysics and Cosmology

Published online by Cambridge University Press:  30 March 2016

L. Woltjer
L. Woltjer*
Affiliation:
European Southern Observatory, c/o CERN, CH-1211 Geneva 23, Switserland.

Abstract

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A brief review is given of cosmological tests based on quasars, of source evolution and of the X-ray background. The cosmological tests are still inconclusive because of the limited material available and the possibility of serious selection effects. Quasars and other extra-galactic sources account for most or all of the background in the 1-10 kev range and very possibly also at higher X- and γ-ray energies.

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. 753 - 761
Copyright
Copyright © Cambridge University Press 1980

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