S E M I N A R IDepartament d'Astronomia i Astrofísica
Universitat de València
The distribution of stars around massive black holes in galactic nuclei - Implications for extreme-mass ratio inspirals and LISA
Max-Planck Institut für Gravitationsphysik (Albert Einstein-Institut), Potsdam, Alemanya
Seminari del departament d'Astronomia i Astrofísica
Dijous 21 octubre 2010
Mass segregated stellar cusps are the natural configuration for nuclear stellar clusters in steady state with a central massive black hole of mass Mbh <~ few x 10^6 Msun. Detailed N-body and Fokker-Planck studies agree quite well with each other in the description of the bulk properties of the stellar distribution of such systems. For typical initial mass functions, the cluster is in the regime of strong mass segregation and therefore stellar-mass black holes dominate the spatial density in the innermost regions close to the massive black hole. As a natural consequence, the rates of extreme mass ratio inspirals detectable by LISA will be dominated by the inspiral of stellar-mass black holes.