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University of Nebraska - Lincoln

2007

Galaxies: active – polarization – radiative transfer – scattering

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Modeling Optical And Uv Polarization Of Agnsi. Imprints Of Individual Scattering Regions, René W. Goosmann, C. Martin Gaskell Jan 2007

Modeling Optical And Uv Polarization Of Agnsi. Imprints Of Individual Scattering Regions, René W. Goosmann, C. Martin Gaskell

Martin Gaskell Publications

Context. Spectropolarimetry of AGNs is a powerful tool for studying the structure and kinematics of the inner regions of quasars. Aims. We wish to investigate the effects of various AGN scattering region geometries on the polarized flux. Methods. We introduce a new, publicly available Monte Carlo radiative transfer code, stokes, which models polarization induced by scattering off free electrons and dust grains. We model a variety of regions in AGNs. Results. We find that the shape of the funnel of the dusty torus has a significant impact on the polarization efficiency. A compact torus with a steep inner surface scatters ...