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Tidal disruption events, which occur when a star is shredded by the tidalfield of a supermassive black hole, provide a means of fueling black holeaccretion. Here we show, using a combination of three body orbit integrationsand hydrodynamic simulations, that these events are also capable of generatingcircumbinary rings of gas around tight supermassive black hole binaries withsmall mass ratios. Depending on the thermodynamics, these rings can eitherfragment into clumps that orbit the binary, or evolve into a gaseouscircumbinary disc. We argue that tidal disruptions provide a direct means ofgenerating circumbinary discs around supermassive black hole binaries and, moregenerally, can replenish the reservoir of gas on very small scales in galacticnuclei.

Circumbinary discs from tidal disruption events