Variability in LINERs
  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. 
J. C. Shields (Ohio U.), H.-W. Rix (MPIA-Heidelberg), D. H. McIntosh   (Arizona), L. C. Ho (OCIW), G. Rudnick (Arizona), A. ...