Variability in LINERs
Abstract
A small number of LINERs have been seen to display variable H-alpha emission with a very broad, double-peaked profile. Recent observations with the Hubble Space Telescope indicate that such emission may be a common attribute of LINERs. The double-peaked or double-shouldered line profiles resemble those found in a subset of broad-line radio galaxies. Several lines of argument suggest that such features trace an outer thin accretion disk irradiated by an inner ion torus, in accord with advection-dominated accretion flow (ADAF) models. Variability monitoring of this broad H-alpha component thus may provide a means of testing accretion physics on small scales within these sources.
Cite
@article{arxiv.astro-ph/0009310,
title = {Variability in LINERs},
author = {J. C. Shields and H. -W. Rix and D. H. McIntosh and L. C. Ho and G. Rudnick and A. V. Filippenko and W. L. W. Sargent and M. Sarzi and M. Eracleous},
journal= {arXiv preprint arXiv:astro-ph/0009310},
year = {2007}
}
Comments
7 pages, 2 figures. To appear in "Probing the Physics of Active Galactic Nuclei by Multiwavelength Monitoring"