Circumbinary discs from tidal disruption events
  Tidal disruption events, which occur when a star is shredded by the tidal
field of a supermassive black hole, provide a means of fueling black hole
accretion. Here we show, using a combination of three body orbit integrations
and hydrodynamic simulations, that these events are also capable of generating
circumbinary rings of gas around tight supermassive black hole binaries with
small mass ratios. Depending on the thermodynamics, these rings can either
fragment into clumps that orbit the binary, or evolve into a gaseous
circumbinary disc. We argue that tidal disruptions provide a direct means of
generating circumbinary discs around supermassive black hole binaries and, more
generally, can replenish the reservoir of gas on very small scales in galactic
nuclei.
