The contribution from active galactic nuclei to the diffuse 1 MeV background

Details The contribution from active galactic nuclei to the diffuse 1 MeV background The contribution from active galactic nuclei to the diffuse 1 MeV background

Aug 1987

adsabs.harvard.edu/cgi-bin/nph-data_query?bibcode=1987ap%26ss.136....1y&link_type=abstract

Astrophysics and Space Science (ISSN 0004-640X), vol. 136, no. 1, Aug. 1987, p. 1-10.

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1

Active Galactic Nuclei, Background Radiation, Computational Astrophysics, Diffuse Radiation, Quasars, Seyfert Galaxies, Gamma Ray Astronomy, X Ray Astronomy

Scientific paper

A method is proposed to estimate the contribution from Seyfert galaxies and quasars to the diffuse 1 MeV background. First of all, the author calculates the contribution from these active galactic nuclei (AGNs) to the 2 keV background using traditional methods. He then chooses a suitable spectral X-ray index, which is found to be universal, to find the 1 MeV contribution from these AGNs by extrapolation. Results show that quasars generate about 40% of the 1 MeV background while Seyfert galaxies produce more than 40% taking into account the Penrose Compton Scattering gamma ray emissions. These results indicate that the 1 MeV background is likely to be generated by discrete objects.

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