Spectropolarimetry Surveys of Obscured AGNs
Abstract
Description
The results of spectropolarimetry surveys of obscured AGNs are reviewed, paying special attention to their implications for the existence of two populations of type 2 Seyfert galaxies -- hidden Seyfert 1s and "true" Seyfert 2s. In this context, the results from our Keck spectropolarimetry survey are presented. Similar to previous work, we have detected hidden broad-line regions (HBLRs) in about half of our sample. However, owing to different selection methods, we find that differences in the properties of HBLR and non-HBLR objects are much less pronounced than prior reports have indicated. Spectropolarimetry studies continue to benefit AGN research, as illustrated by the discovery of double-peaked H-alpha emission in the polarized-flux spectrum of NGC 2110.
To appear in "The Central Engine of Active Galactic Nuclei," eds. L.C. Ho and J.-M. Wang (San Francisco: ASP). 10 pages, uses asp2006.sty
To appear in "The Central Engine of Active Galactic Nuclei," eds. L.C. Ho and J.-M. Wang (San Francisco: ASP). 10 pages, uses asp2006.sty