Astronomy and Astrophysics – Astronomy
Scientific paper
Feb 1980
adsabs.harvard.edu/cgi-bin/nph-data_query?bibcode=1980nyasa.336..267s&link_type=abstract
In: Texas Symposium on Relativistic Astrophysics, 9th, Munich, West Germany, December 14-19, 1978, Proceedings. (A80-42502 18-90
Astronomy and Astrophysics
Astronomy
1
Background Radiation, Extraterrestrial Radiation, Galactic Radiation, Gamma Ray Astronomy, Seyfert Galaxies, Baryons, Black Holes (Astronomy), Continuous Radiation, Diffuse Radiation, Gamma Ray Spectra, Milky Way Galaxy, Quasars
Scientific paper
Observations of the gamma-ray (GR) emission from Seyfert galaxies and the origin of the diffuse cosmic GR component are critically reviewed. A comparison of observations of NGC 4151 at X-ray energies and at GR energies is presented. In addition, synchrotron self-Compton models are discussed as a possible explanation for the cutoff in the GR spectrum. The origin of the diffuse cosmic GR component is investigated as the possible result of various processes, including quantum-mechanical decay of small black holes and matter-antimatter annihilation in a baryon symmetric universe. Also discussed is continuum GR emission from our own galaxy, from the quasar 3C273 and from the Seyfert galaxy NGC 4151.
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