Temporal and spatial chaos of RN-AdS black holes immersed in Perfect Fluid Dark Matter

Black Holes as Dark Matter

While the energy of the universe has been established to be about 0.04 baryons, 0.24 dark matter and 0.72 dark energy, the cosmological entropy is almost entirely, about (1−10), from black holes and only 10 from everything else. This identification of all dark matter as black holes is natural in statistical mechanics. Cosmological history of dark matter is discussed. [email protected]

Black Holes as Dark Matter Annihilation “Boosters”

The presence and growth of Intermediate and Supermassive Black Holes modify the surrounding distribution of stars and Dark Matter, and inevitably affect the prospects for indirectly detecting Dark Matter through its annihilation products. We show here that under specific circumstances, Black Holes can act as Dark Matter annihilation “boosters”. In particular, we show that mini-spikes, i.e. Dark...

Dark Matter Accretion into Supermassive Black Holes

Dark Matter in Galaxies and Growth of Giant Black Holes

The connection between dark matter and giant black holes in the galactic nuclei is investigated. The joint evolution of dark and luminous matter in averaged self-consistent gravitational potential is considered. It is shown that the distribution of dark matter remains spherically symmetric even in presence of essential asymmetry of luminous matter in the galaxy. The kinetic equation describing ...

Perfect fluid around black holes and naked singularities

We find analytical solutions for the spherically symmetric stationary distribution of a test perfect fluid with an arbitrary equation of state in the ReissnerNordström metric. These solutions describe the stationary accretion onto black hole and the static atmosphere of a fluid around the naked singularity. The electrically charged black hole evolves to a near extreme state by accretion of a ph...