Unbeamed γ-rays from low luminosity AGNs

A. Niedźwiecki F. Xie V. Beckmann 1
1 APC - AHE - APC - Astrophysique des Hautes Energies
APC - UMR 7164 - AstroParticule et Cosmologie, Dipartimemto di Astronomia, Universita degli Studi di Bologna
Abstract : Proton-proton collisions in two-temperature accretion flows may lead to substantial γ-ray emission through neutral pion production and decay. We present preliminary results of our study of such a hadronic γ-ray emission. We find that radiatively inefficient flows around rapidly rotating black holes can produce the MeV/GeV luminosities up to ~ 1044 erg s-1. The hot-flow model predictions for the hadronic and the Comptonization components can put interesting constraints on the properties of the source of high-energy radiation in AGNs. As an example, we compare our model with X/γ-ray observations of Centaurus A and we find that the model with a maximally rotating black hole strongly overpredicts the γ-ray flux.
Type de document :
Communication dans un congrès
International Workshop on Beamed and Unbeamed Gamma-Rays from Galaxies, Apr 2011, Muonio, Finland. 355, pp.2035, 2012, <10.1088/1742-6596/355/1/012035>


https://hal.archives-ouvertes.fr/hal-00728760
Contributeur : Volker Beckmann <>
Soumis le : jeudi 6 septembre 2012 - 15:34:53
Dernière modification le : mardi 11 octobre 2016 - 13:25:33

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A. Niedźwiecki, F. Xie, V. Beckmann. Unbeamed γ-rays from low luminosity AGNs. International Workshop on Beamed and Unbeamed Gamma-Rays from Galaxies, Apr 2011, Muonio, Finland. 355, pp.2035, 2012, <10.1088/1742-6596/355/1/012035>. <hal-00728760>

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