Unbeamed γ-rays from low luminosity AGNs
International audience 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 rapidl...
Published in: | Journal of Physics: Conference Series |
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Main Authors: | , , |
Other Authors: | , , , , |
Format: | Conference Object |
Language: | English |
Published: |
HAL CCSD
2011
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Subjects: | |
Online Access: | https://hal.science/hal-00728760 https://doi.org/10.1088/1742-6596/355/1/012035 |
Summary: | International audience 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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