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Steep-Spectrum Radio Sources in Clusters of Galaxies—The Southern Sample

Published online by Cambridge University Press:  25 April 2016

O. B. Slee  and
J. E. Reynolds
O. B. Slee
Affiliation:
Division of Radiophysics, CSIRO, Sydney
J. E. Reynolds
Affiliation:
School of Physics, University of Sydney
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Extract

It is well established (e.g. Slee et al. 1983) that radio galaxies near the centres of rich clusters of galaxies tend to have steeper radio spectra than field radio galaxies. The fact that the sources with the steepest spectra occur in clusters that are highly luminous X-ray emitters has generally been interpreted in terms of the confining influence of a hot (~108 K), relatively dense (10-2 to 10-3 electrons cm-3) intra-cluster gas; the confined relativistic plasma then preferentially loses its high-energy electrons through synchrotron and inverse Compton losses, resulting in a steepening of the radio spectrum. A more detailed review of the evidence for this process is given by Robertson (1983).

Type
Contributions
Information
Publications of the Astronomical Society of Australia , Volume 5 , Issue 4 , 1984 , pp. 516 - 529
Copyright
Copyright © Astronomical Society of Australia 1984

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