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High-Energy Radiation From Active Galactic Nuclei

Published online by Cambridge University Press:  12 April 2016

Marek Sikora
Marek Sikora*
Affiliation:
N. Copernicus Astronomical Center, Polish Academy of Sciences, Warsaw, PolandandJoint Institute for Laboratory Astrophysics, University of ColoradoandNational Institute of Standards and Technology, Boulder, Colorado

Abstract

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Two recent findings concerning high-energy radiation properties of active galactic nuclei—discovery of breaks in hard X-ray spectra of Seyfert galaxies, and discovery of huge fluxes of hard gamma rays from blazars—seem to press us to change our standard views about radiation production in these objects. I review briefly the existing radiation models, confront them with the newest observations, and discuss newly emerging theoretical pictures which attempt to account for the discoveries.

Subject headings: galaxies: active — galaxies: nuclei — radiation mechanisms: nonthermal

Type
Active Galaxies and Quasi-Stellar Objects
Information
International Astronomical Union Colloquium , Volume 142: Particle Acceleration Phenomena in Astrophysical Plasmas , 1994 , pp. 923 - 928
Copyright
Copyright © The American Astronomical Society 1994

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