PhD thesis "Dynamics of dark matter in galactic centers" (in Russian)
Abstract:
The evolution of dark matter in central areas of galaxies is considered (Milky Way is taken as an example). The formation of a galaxy leads to the compression of dark matter halo due to baryonic infall. Traditional method of calculating the compression (Blumenthal method) is shown to overestimate the dark matter density, especially for more flat initial halo density profiles and for radially anisotropic particle velocities. Subsequent evolution is driven by scattering off of dark matter particles on bulge stars and their absorption by the supermassive black hole. It is described by diffusion equation in energy - angular momentum phase space. The diffusion coefficients are calculated, as well as the absoroption and evaporation rate of particles. It is shown that by now the density of dark matter inside central parsec is greatly diminished: approximately 10% of initial dark matter mass is captured by black hole, about a half is evaporated. The annihilation of particles may explain observed gamma-ray flux from Galactic center