Description
Chairman: Martin Kološ
The standard scenario of a geometrically thin, planar accretion disk can be violated by a number of effects that must operate in astrophysically more realistic schemes. Even within a highly simplified framework of an axially symmetric (2D), steady, Keplerian accretion, the radial structure can be different from the predictions of the classical Shakura-Sunyaev theory. For example, stars and...
Black holes attract gaseous material from the surrounding environment. Cosmic plasma is largely ionized magnetized because of electric currents flowing in the highly conductive environment near black holes; the process of accretion then carries the magnetic flux onto the event horizon, $r\simeq R_+$. On the other hand, magnetic pressure acts against accretion. It can not only arrest the inflow...
The close neighbourhood of a supermassive black hole contains not only the accreting gas and dust but also stellar-sized objects like stars, stellar-mass black holes, neutron stars, dust-enshrouded objects, etc. These entities interact with the accreting medium and perturb the quasi-stationary configuration of the accretion flow. We investigate how the passage of a star can influence the black...