The signature of tidal disruption phenomena in the vicinity of a black   hole
  Tidal effects on clumps of material during random non-stationary accretion onto a black hole produce phenomena with distinct temporal characteristics in observed light-curves. During such non-stationary accretion events, the shape of the accreting object evolves in time, and observable quasi-periodic phenomena with variable quasi-periods are produced. A number of characteristic light-curves, obtained with numerical simulations, will be shown. Their relevance to observed phenomena will be briefly discussed. 
Uros Kostic, Andrej Cadez, Massimo Calvani, Claudio Germana
astro-ph.HE