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X-ray and radio emission by clusters of galaxies

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Abstract

analysis of new X-ray and optical data confirms that the X-ray luminosityL x of a cluster of galaxies is strongly dependent on its richness. The radio powerP 1445 of clusters at 1445 MHz is independent of richness, but is greater on the average for clusters with dominant cD galaxies than for those withou. The radio emission depends on the activity of one of the brightest galaxies; dominant cD galaxies are often responsible for radio emission, especially if they have double or multiple nuclei. For a given richness, high values ofL x andP 1445 sometimes occur together, but no strict correlation betweenL x andP 1445 exists. Possible tests of thermal-bremsstrahlung and inverse-Compton theories for the X-ray emission are mentioned.

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Authors and Affiliations

  1. Royal Observatory, Edinburgh, Scotland

    B. N. G. Guthrie

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  1. B. N. G. Guthrie
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Guthrie, B.N.G. X-ray and radio emission by clusters of galaxies. Astrophys Space Sci 27, 489–496 (1974). https://doi.org/10.1007/BF00643893

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  • DOI: https://doi.org/10.1007/BF00643893

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