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A study of the emission processes of two different types of gamma-emitting Active Galactic Nuclei

Abstract : This thesis manuscript presents the study of the emission processes of two types of gamma-emitting active galactic nuclei: TeV-detected blazars and GeV-detected Narrow Line Seyfert 1s (NLS1s).The Spectral Energy Distribution (SED) of TeV blazars can in general be well described by simple one-zone synchrotron self-Compton models. Such model has been applied to the blazar 1ES2322-409 that was first detected at TeV by the HESS collaboration.Additional external photon fields such as the obscuring torus, the accretion disc, the X-ray corona or the broad line region are necessary to describe the observed radiation and broad-band SED of gamma-emitting NLS1s. A numerical model that takes into account emission from these external fields has been developed. The model explains the observed emission and the transition from quiescent to gamma-ray flaring states of three gamma-emitting NLS1s: 1H0323+342, B20954+25A and PMN J0948+0022.
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https://tel.archives-ouvertes.fr/tel-01851649
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Submitted on : Monday, July 30, 2018 - 3:49:07 PM
Last modification on : Wednesday, October 14, 2020 - 4:12:57 AM
Long-term archiving on: : Wednesday, October 31, 2018 - 1:46:15 PM

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Maialen Arrieta Lobo. A study of the emission processes of two different types of gamma-emitting Active Galactic Nuclei. Astrophysics [astro-ph]. Université Paris sciences et lettres, 2017. English. ⟨NNT : 2017PSLE0010⟩. ⟨tel-01851649⟩

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