Gamma ray flares in AGN

Astronomy and Astrophysics – Astronomy

Scientific paper

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Accretion Disks, Active Galactic Nuclei, Black Holes (Astronomy), Emission Spectra, Gamma Rays, Electric Potential, Gamma Ray Observatory, Gamma Ray Spectrometers, Gamma Ray Telescopes

Scientific paper

The inner regions of accretion disks of supermassive black holes can become unstable when the existing temperatures are sufficiently high. This naturally occurs for two-temperature disks in the case of rapidly spinning (Kerr) black holes. Physical effects in the hot, inner regions are such that non-steady flows can result. Effects which would be relevant in producing variability in intense gamma-ray sources (MeV to GeV range), such as the recent discovery of strong gamma-ray emission in 3C 279, are discussed.

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