Diffuse gamma rays from discrete extragalactic sources

Details Diffuse gamma rays from discrete extragalactic sources Diffuse gamma rays from discrete extragalactic sources

Sep 1976

adsabs.harvard.edu/cgi-bin/nph-data_query?bibcode=1976jpha....9.1553s&link_type=abstract

Journal of Physics, Part A - Mathematical and General, vol. 9, Sept. 1976, p. 1553-1566.

Physics

15

Background Radiation, Diffuse Radiation, Extragalactic Radio Sources, Gamma Rays, Radio Galaxies, X Rays, Astronomical Models, Galactic Clusters, Luminous Intensity, Seyfert Galaxies, X Ray Spectra

Scientific paper

An estimate is made of the fraction of the diffuse gamma-ray background originating in discrete sources rather than intergalactic space. It is shown that 'normal' galaxies probably contribute about 4% of the gamma-ray flux above 100 MeV. Radio galaxies can produce the bulk of the 1-10-MeV background if there is proportionality between their gamma-ray and radio luminosities. Seyfert galaxies and clusters can account for most of the 100-MeV observations if the X-ray and gamma-ray emissions are produced by the inverse Compton mechanism.

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