Variability in LINERs

Details Variability in LINERs Variability in LINERs

2000-09-19

arxiv.org/abs/astro-ph/0009310v1

Astronomy and Astrophysics

Astrophysics

7 pages, 2 figures. To appear in "Probing the Physics of Active Galactic Nuclei by Multiwavelength Monitoring"

Scientific paper

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.

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