RAGtime 23

Session

EM Interactions in GR

10 Sept 2021, 11:30

Opava

9. Innermost stable circular orbits around charged, rotating black holes

Kris Schroven

10/09/2021, 11:30

Talk

The fact that stable circular orbits cannot be found arbitrarily close around very compact objects -- such as black holes - can only be explained relativistically. The occurrence of an Innermost Stable Circular Orbit has a strong influence the accretion processes, that take place in the very inner regions of an accretion environment. We discuss these orbits in the case of charged, spinning...

19. Particle ionization near a weakly charged black hole

Bakhtinur Juraev

10/09/2021, 11:55

Talk

In many astrophysical scenarios, the charge of the black hole is often neglected due to unrealistically large values of the charge required for the Reissner-Nordström spacetime metric. However, black holes may possess a small electric charge due to various selective accretion mechanisms. We investigate the process of ionization of a neutral particle in the vicinity of a weakly charged...

42. Role of non-axisymmetry in electro-vacuum magnetospheres of compact objects

Ondrej Kopacek (Astronomical Institute, Czech Academy of Sciences)

10/09/2021, 12:15

Talk

We discuss some effects of breaking the axial symmetry in vacuum magnetospheres of black holes and neutron stars. In particular, we analyze the emergence of magnetic null points which may occur due to non-axisymmetry, and substantially affect the dynamics of electrically charged particles.