Globular cluster-massive black hole interactions in galactic centers
  Many, if not all, galaxies host massive compact objects at their centers. They are present as singularities (super massive black holes) or high density star clusters (nuclear tar clusters). In some cases they coexist, and interact more or less strongly. In this short paper I will talk of the 'merger' globular cluster scenario, which has been shown in the past to be an explanation of the substantial mass accumulation in galactic centers. In particular, I will present the many astrophysical implications of such scenario pointing the attention on the mutual feedback of orbitally decaying globular clusters with massive and super massive black holes. 
R. Capuzzo-Dolcetta (Dep. of Physics, Sapienza, Universit\`a di Roma,   Italy)
astro-ph.GA