Dynamical Friction of Galactic Center Star Clusters with an Intermediate-Mass Black Hole

摘要: Numerical simulations of the dynamical friction suffered by a Galactic center star cluster harboring an intermediate-mass black hole (IMBH) have been performed. Gerhard has suggested that friction, which causes to lose orbital energy and spiral in toward center, may explain presence very young stars central parsec, where formation might be prohibitively difficult because strong tidal forces. However, numerical Kim & Morris showed this is only possible if initially extremely dense core. Hansen Milosavljevic recently IMBH core stabilize against disruption during inspiral through thus easily deliver down parsec. We find does lower minimum initial density required transport but when mass at least ~10% total mass. This fraction significantly higher than estimated Portegies Zwart McMillan with successive merging core, so it not appear realistic can help into