Unbeamed γ-rays from low luminosity AGNs

A. Niedźwiecki F. Xie V. Beckmann 1
1 APC - AHE
APC - UMR 7164 - AstroParticule et Cosmologie
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.
Document type :
Conference papers
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
Contributor : Volker Beckmann <>
Submitted on : Thursday, September 6, 2012 - 3:34:53 PM
Last modification on : Thursday, April 23, 2015 - 2:09:35 PM

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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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