Tidal Disruption of a Solar‐Type Star by a Supermassive Black Hole

We study the long term evolution of a solar type star that is being disruptedby a super massive (10^6 solar mass) black hole. The evolution is followed fromthe disruption event, which turns the star into a long thin stream of gas, tothe point where some of this gas returns to pericenter and begins its secondorbit around the black hole. Following the evolution for this long allows us todetermine the amount of mass that is accreted by the black hole. We find thatapproximately 750f the returning mass is not accreted but instead becomesunbound, following the large compression characterizing the return topericenter. The impact of a tidal disruption on the surrounding gas maytherefore be like that of two consecutive supernove-type events.