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Unbeamed γ-rays from low luminosity AGNs
Niedźwiecki A., Xie F., Beckmann V.
Dans International Workshop on Beamed and Unbeamed Gamma-Rays from Galaxies - International Workshop on Beamed and Unbeamed Gamma-Rays from Galaxies, Muonio : Finlande (2011) - http://hal.archives-ouvertes.fr/hal-00728760
Physique/Astrophysique/Cosmologie et astrophysique extra-galactique
Planète et Univers/Astrophysique/Cosmologie et astrophysique extra-galactique
Unbeamed γ-rays from low luminosity AGNs
A. Niedźwiecki, F. Xie, V. Beckmann1
1 :  APC - UMR 7164 - AstroParticule et Cosmologie
http://www.apc.univ-paris7.fr/
CNRS : UMR7164 – IN2P3 – Observatoire de Paris – Université Paris VII - Paris Diderot – CEA : DSM/IRFU
APC - UMR 7164, Université Paris Diderot, 10 rue Alice Domon et Léonie Duquet, case postale 7020, F-75205 Paris Cedex 13
France
APC - AHE
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.
Anglais

Journal of Physics: Conference Series
Publisher Institute of Physics: Open Access Journals
ISSN 1742-6588 (eISSN : 1742-6596)
International Workshop on Beamed and Unbeamed Gamma-Rays from Galaxies
internationale
Communications avec actes
03/2012
355
2035

International Workshop on Beamed and Unbeamed Gamma-Rays from Galaxies
11/04/2011
15/04/2011
Muonio
Finlande