Andreas K├╝pper


Juggling with Black Holes

Black holes are extremely compact and massive objects. They usually live in environments like centers of galaxies or ancient globular clusters, where they are surrounded by millions of stars. Often enough they encounter another black hole -- or even many of them at the same time! At Columbia University we study what happens when black holes get together and dance around each other. In numerical simulations, we see dramatic events happening, such as mergers between supermassive black holes, or slingshots, where stars and black holes can be ejected from a galaxy at speeds of several million mp/h! I will give an overview of the dynamical processes, and I will show how we can observe the consequences of these extreme events.