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High-energy radiation from active galactic nuclei
Sikora, Marek
AA(Polish Academy of Sciences, Warsaw, Poland)
Astrophysical Journal Supplement Series (ISSN 0067-0049), vol. 90, no. 2, p. 923-928 (ApJS Homepage)
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NASA/STI Keywords:
Active Galactic Nuclei, Astronomical Models, High Energy Interactions, Plasma Jets, Synchrotron Radiation, Blazars, Compton Effect, Energy Distribution, Gamma Rays, Power Spectra, Seyfert Galaxies, X Ray Spectra
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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.

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