Journal Article

Inverse Compton scattering model for gamma-ray production in MeV blazars

W. Bednarek

in Monthly Notices of the Royal Astronomical Society

Published on behalf of The Royal Astronomical Society

Volume 294, issue 3, pages 439-442
Published in print March 1998 | ISSN: 0035-8711
Published online March 1998 | e-ISSN: 1365-2966 | DOI: http://dx.doi.org/10.1111/j.1365-8711.1998.01183.x
Inverse Compton scattering model for gamma-ray production in MeV blazars

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Abstract

It is proposed that the spectra of so-called ‘MeV blazars’ can be explained in terms of previously developed models of the external Comptonization of accretion disc radiation, provided that the structure of the inner and outer parts of the accretion disc is different. The electron acceleration is saturated by the inverse Compton losses in the inner geometrically thick disc and the outer geometrically thin disc at different maximum energies; this causes the appearance of two spectral components, one strongly peaked in the MeV energy range and the other of a power-law type extending through the GeV energy range. The spectra, computed in terms of such a simple geometrical model, are in good agreement with observations of the MeV blazar PKS 0208-512. They are consistent with the transient appearance of a strong MeV peak, the power-law spectrum in the EGRET energy range, and a possible cut-off at high energies.

Keywords: galaxies: active; galaxies: individual: PKS 0208-512; quasars: general

Journal Article.  0 words. 

Subjects: Astronomy and Astrophysics

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