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Interactions of non-thermal X-rays and ultraviolet radiation by the intergalactic gas

Published online by Cambridge University Press:  14 August 2015

M. J. Rees  and
G. Setti
M. J. Rees
Affiliation:
Institute of Theoretical Astronomy, University of Cambridge, England
G. Setti
Affiliation:
Institute of Physics, University of Bologna, Italy

Extract

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We wish to discuss two ways in which non-thermal background X-rays and ultraviolet radiation may interact with intergalactic matter: (i) low energy photons may be intense enough to photoionize the intergalactic medium and maintain it as an Hii region; (ii) the recoil associated with Compton scattering of hard X-rays provides an additional heat input into the medium, as well as causing a characteristic modification of the background radiation spectrum. We shall merely summarize our results here, as fuller details are appearing elsewhere (Rees and Setti, 1969).

Type
Research Article
Information
Symposium - International Astronomical Union , Volume 37: Non-Solar X- and Gamma-Ray Astronomy , 1970 , pp. 402 - 405
Copyright
Copyright © Reidel 1970 

References

Gunn, J. E. and Peterson, B. A.: 1965, Astrophys. J. 142, 1633.CrossRefGoogle Scholar
Noerdlinger, P. D.: 1969, Astrophys. J. 156, 841.CrossRefGoogle Scholar
Rees, M. J. and Setti, G.: 1969, Astron. Astrophys. (submitted for publication).Google Scholar
Sunyaev, R. A.: 1969, Astrophys. Letters 3, 33.Google Scholar