Long-Term Profile Variability of Double-Peaked Emmission Lines in AGNs
Astrophysics
2009-11-10 v1
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 H alpha line profiles and compare with those of two simple models: a circular disk with a spiral arm and an elliptical disk.
Keywords
Cite
@article{arxiv.astro-ph/0404342,
title = {Long-Term Profile Variability of Double-Peaked Emmission Lines in AGNs},
author = {Karen T. Lewis and Michael Eracleous and Jules P. Halpern and Thaisa Storchi-Bergmann},
journal= {arXiv preprint arXiv:astro-ph/0404342},
year = {2009}
}
Comments
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