| Domaine : |
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| Titre : |
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Unbeamed γ-rays from low luminosity AGNs |
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| Auteur(s) : |
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A. Niedźwiecki, F. Xie, V. Beckmann1 |
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| Laboratoire : |
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| équipe(s) de recherche : |
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APC - AHE |
| Résumé : |
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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. |
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Langue du texte
intégral : |
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Anglais |
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| Journal : |
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| Titre de l'ouvrage : |
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International Workshop on Beamed and Unbeamed Gamma-Rays from Galaxies |
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| Audience : |
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internationale |
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| Type de publication : |
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Communications avec actes |
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| Date de publication : |
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03/2012 |
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| Volume : |
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355 |
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| Page, identifiant, ... : |
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2035 |
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| Titre de la conférence : |
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International Workshop on Beamed and Unbeamed Gamma-Rays from Galaxies |
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| Date de la conférence : |
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11/04/2011 |
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| Date de la conférence (fin) : |
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15/04/2011 |
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| Ville : |
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Muonio |
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| Pays : |
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Finlande |
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