Long-term profile variability of double-peaked emission lines in AGNs
Abstract
An increasing number of AGNs exhibit broad, double-peaked Balmer emission lines, which arise from the outer regions of the accretion disk which fuels the AGN. The line profiles vary on timescales of 5-10 years. Our group has monitored a set of 20 double-peaked emitters for the past 8 years (longer for some objects). Here we describe a project to characterize the variability patterns of the double-peaked Hα line profiles and compare with those of two simple models: a circular disk with a spiral arm and an elliptical disk.
- Publication:
-
The Interplay Among Black Holes, Stars and ISM in Galactic Nuclei
- Pub Date:
- November 2004
- DOI:
- 10.1017/S1743921304001668
- arXiv:
- arXiv:astro-ph/0404342
- Bibcode:
- 2004IAUS..222..107L
- Keywords:
-
- Astrophysics
- E-Print:
- 2 pages, 1 figure, to appear in the proceedings of "The Interplay among Black Holes, Stars and ISM in Galactic Nuclei", IAU 222, eds. T. Storchi Bergmann, L.C. Ho, and H.R. Schmitt