Supermassive Black Hole Formation InsidePrimordial Black Hole Clusters

摘要

A model of supermassive black hole formation inside clusters of primordial black holes is developed. We suppose that small mass fraction of the Universe, 10~(-3), is composed of compact clusters of primordial (relic) black holes, produced during a phase transition at early epochs. These clusters are the centres of dark matter condensation. We model the formation of protogalaxies with masses about 2 x 10~8M_o at redshift z = 15. These induced protogalaxies contain central black holes with mass 10~5M_o and look like dwarf spheroidal galaxies with a central density spike. The multiple coalescences of primordial black holes results in formation of supermassive black holes in 'galactic centers. The observed correlation between the masses of central black holes and velocity dispersion in the galactic bulges is reproduced in this model.