L. C. Popović, E. Shablovinskaya, Dj. Savić
Published 2021-11-11Version 1
We discuss the polarization of broad emission lines in the type 1 active galactic nuclei (AGNs). The polarization depends on the geometry of the broad line region (BLR), and also on the polarization mechanism, or distribution of the scattering material. Therefore the polarization measurements can indicate the geometry of the BLR and the mechanism of polarization (equatorial or polar scattering). In addition, the polarization angle (PA) shape across the line profile can be used to measure the supermassive black hole (SMBH) mass, and constrain the BLR characteristics. We give an overview of ours and other recent investigations of the polarization in broad lines from both aspects: theoretical and observational.
Comments: accepted in Ast.Nach. This review was present at 13th SCSLSA in a special session dedicated to the memory of Victor Leonidovich Afanasiev who passed away in December 2020
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