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Modeling optical and UV polarization of AGNs: II. Polarization imaging and complex reprocessing

Marin, F ; Goosmann, R W ; Gaskell, C M ; Porquet, D ; Dovciak, M

Astronomy and astrophysics (Berlin), 2012-12, Vol.548, p.1-1 [Periódico revisado por pares]

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Título:
Modeling optical and UV polarization of AGNs: II. Polarization imaging and complex reprocessing
Autor: Marin, F ; Goosmann, R W ; Gaskell, C M ; Porquet, D ; Dovciak, M
É parte de: Astronomy and astrophysics (Berlin), 2012-12, Vol.548, p.1-1
Notas: ObjectType-Article-1
SourceType-Scholarly Journals-1
content type line 23
ObjectType-Feature-2
Descrição: The innermost parts of active galactic nuclei (AGN) are believed to be comprised of several emission and scattering media coupled by radiative processes. This paper aims to obtain a coherent model of the polarization signature resulting from the radiative coupling between the components, to compare our results with polarimetry of thermal AGN, and thereby to put constraints on the geometry. The authors used a new public version of stokes, a Monte Carlo radiative transfer code presented in the first paper of this series. The modeling of type-1 AGNs indicates that the torus is more likely to have a large half-opening angle. Polarization perpendicular to the axis of the torus may arise at a type-1 viewing angle for a torus half-opening angle of 30[ring]-45[ring] or polar outflows with an optical depth near unity. The modeling suggests that most Seyfert-2 AGN must have a half-opening angle greater than 60[ring] to match the expected level of perpendicular polarization.
Idioma: Inglês

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