X-Ray and Radio Emission by Clusters of Galaxies

Details X-Ray and Radio Emission by Clusters of Galaxies X-Ray and Radio Emission by Clusters of Galaxies

Apr 1974

adsabs.harvard.edu/cgi-bin/nph-data_query?bibcode=1974ap%26ss..27..489g&link_type=abstract

Astrophysics and Space Science, Volume 27, Issue 2, pp.489-496

Astronomy and Astrophysics

Astrophysics

11

Scientific paper

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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