Giant 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 ...

Supermassive black holes as giant Bose-Einstein condensates

The Schwarzschild metric has a divergent energy density at the horizon, which motivates a new approach to black holes. If matter is spread uniformly throughout the interior of a supermassive black hole, with mass M ∼M = 2.34 10M , it may arise from a Bose-Einstein condensate of densely packed H atoms. Within the relativistic theory of gravitation with a positive cosmological constant, a bosonic...

Captures of Red Giant Stars by Black Holes in Elliptical Galaxies: Feedback to the Hot Gas

The highly disturbed hot gas in elliptical galaxies, as revealed in many Chandra X-ray images, implies a source of energy in the galactic nucleus. In some elliptical galaxies faint X-ray “ghost” cavities appear without corresponding radio lobes. It has been suggested that ghost cavities are caused by short-lived activity with a timescale of ∼ 103 − 104 years, but this is difficult to understand...

Resonant excitation of black holes by massive bosonic fields and giant ringings

Dumb holes: analogues for black holes.

The use of sonic analogues to black and white holes, called dumb or deaf holes, to understand the particle production by black holes is reviewed. The results suggest that the black hole particle production is a low-frequency and low-wavenumber process.