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Radiative transfer simulations of Active Galactic Nuclei from the optical to the X-ray range
René Goosman (Institut d’Astronomie de Prague, République Tchèque)
Par Stephane Charpinet - 18/01/2007
Séminaires d’Astrophysique
de l’Observatoire Midi-Pyrénées
Séminaire de
René GOOSMAN
(Institut d’Astronomie de Prague, République Tchèque)
Jeudi 22 Février 2007 à 11h
CESR
Radiative transfer simulations of Active Galactic Nuclei from the optical to the X-ray range
In my talk I give a short overview of the spectral appearance of Active Galactic Nuclei (AGN) over a broad spectral range emphasizing the optical/UV and X-ray properties. Then, I discuss possible approaches to radiative transfer modeling in these spectral domains.
I present polarization modeling results that I obtained using the radiative transfer code STOKES. This code is based on the Monte-Carlo method and allows modeling of optical/UV polarization for AGN and related objects. The code considers electron and dust scattering in sophisticated geometrical arrangements.
For the X-ray range, I discuss the implications of magnetic flares above AGN accretion disks. An emphasis is put on the Compton reflection/reprocessed component that I model self-consistently using the radiative transfer code TITAN/NOAR. I include relativistic corrections of the X-ray emission produced close to the black hole by applying the ray-tracing code KY and I compare our modeling results to the observed X-ray spectra of AGN and their variability.
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