High Precision Simulations of the Evolution of a Super Star Cluster   Around a Massive Black Hole
  We present preliminary results of the application of a new sophisticated code which allows high precision integration of orbits of stars belonging to a dense stellar system moving in the vicinity of a massive black hole. This mimics the situation observed in the center of many galaxies, where a nuclear star cluster contains a massive black hole which, in the past, was, likely, an active engine of violent emission of radiation. The main scope of our work is the investigation of the relaxation of the super star cluster on a sufficiently long time, together with the investigation of its feedback with the massive black hole. 
R. Capuzzo-Dolcetta and M. Spera (Dep. of Physics, "Sapienza",   Universita' di Roma, Roma, Italy)
astro-ph.GA