X-ray emission mechanisms in active galactic nuclei

Diplôme Thèse X-ray emission mechanisms in active galactic nuclei eng 2016-05-27 author Boissay Rozenn 765770 director Paltani Stéphane 27695 10.13097/archive-ouverte/unige:86677 urn:nbn:ch:unige-866777 Sc. 4957 Active Galactic Nuclei (AGN) are compact regions at the centre of active galaxies which are visible across the full electromagnetic spectrum. Their radiation comes from the accretion of matter onto a supermassive black hole. They are particularly bright in X-rays, showing several components in their spectra. The origin of some components is still very debated, for example the nature of the excess of emission often detected in unobscured AGN below 2keV (“soft-excess”), or the location where reflection features are produced. A unified model, describing the global anatomy of an AGN, is commonly used to explain the different classes of these objects. Nevertheless, the structure of their inner regions is still uncertain, as well as the nature of their outflows. My PhD dissertation is dedicated to the study of AGN emission mechanisms and structure, in particular through multiwavelength analyses of the archetypal Seyfert 1 galaxies Mrk 509 and NGC 5548, and through statistical studies. Astronomy Astrophysics High-energy X-rays Active Galactic Nuclei Dewey 520 26 Département d'astronomie 12 false 4efa2f6b-36c1-4dfd-8fd1-0a98f370610a Thesis Public ThesisRozennBoissay.pdf 22011986 application/pdf openAccess Faculté des sciences / Département d'astronomie

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Boissay, Rozenn