6-10 September 2021
Opava
Europe/Prague timezone

Innermost stable circular orbits around charged, rotating black holes

10 Sep 2021, 11:30
25m
Opava

Opava

Hauerova 728

Speaker

Kris Schroven

Description

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 black holes, and find fascinating new properties.

Most astonishingly the radius of the ISCO increases with an increasing particle-black hole charge product |qQ| in both cases of an attractive and repulsive Coulomb interaction for sufficiently big |qQ|. Therefore there exists a 'minimal ISCO' at a certain charge product qQ.

Primary authors

Kris Schroven Saskia Grunau (Institut für Physik, Universität Oldenburg)

Presentation Materials