Speaker
Jiri Horak
(Astronomical Institute ASCR, Prague)
Description
Due to general relativistic effects, accretion disks surrounding black holes can host self-trapped g-modes close to their inner edges. This talk is devoted to their nonlinear evolution. I will discuss change of the trapping region and oscillation frequency of the g-modes when the amplitude of the oscillations is significant. When nonlinearities in the hydrodynamic equations are taken into account, the g-modes are coupled to other oscillation modes. I will show that and their impact on the original g-mode. Finally I will discuss possible excitation mechanisms.
Primary author
Jiri Horak
(Astronomical Institute ASCR, Prague)