Long-Term Profile Variability of Double-Peaked Emmission Lines in AGNs

Details Long-Term Profile Variability of Double-Peaked Emmission Lines in AGNs Long-Term Profile Variability of Double-Peaked Emmission Lines in AGNs

2004-04-16

arxiv.org/abs/astro-ph/0404342v1

Astronomy and Astrophysics

Astrophysics

2 pages, 1 figure, to appear in the proceedings of "The Interplay among Black Holes, Stars and ISM in Galactic Nuclei", IAU 22

Scientific paper

10.1017/S1743921304001668

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.

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