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Self-gravitating perfect-fluid tori around black holes: Bifurcations, ergoregions, and geometrical properties

We investigate models of stationary, selfgravitating, perfect-fluid tori (disks) rotating around black holes, focusing on geometric properties of spacetime. The models are constructed within the general-relativistic hydrodynamics, assuming differential (Keplerian) rotation of the fluid. We discuss a parametric bifurcation occurring in the solution space, different possible configurations of ergoregions (including toroidal ergoregions associated with the tori), nonmonotonicity of the circumferential radius, as well as the impact of the torus gravity on the location of the innermost stable circular orbit.

preprint2019arXivOpen access
Wojciech DybaWojciech KulczyckiPatryk Mach
gr-qc
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Open access3 authors1 topic
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Wojciech DybaWojciech KulczyckiPatryk Mach

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