Astronomy and Astrophysics – Astronomy
Scientific paper
Jul 2008
adsabs.harvard.edu/cgi-bin/nph-data_query?bibcode=2008asthe.101..391i&link_type=abstract
The Astronomical Herald (ISSN 0374-2466), Vol. 101, No. 7, p. 391 - 396 (2008)
Astronomy and Astrophysics
Astronomy
Gamma-Ray Background, Hard X-Rays, Active Galactic Nuclei
Scientific paper
The origin of the extragalactic MeV gamma-ray background radiation is still unknown. Current AGN spectrum models which explain the cosmic X-ray background cannot explain the MeV background spectrum, because of the thermal exponential cutoff. Here the author constructs a new spectral model including nonthermal coronal electrons, which are expected to exist in a magnetic reconnection heating corona. It is shown that the MeV background spectrum can nicely be explained by the model and discussed the properties of such nonthermal electrons comparing with those in solar flares and the Earth magnetosphere.
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