79 citations · 174 across the 9 of their papers we have counts for
10 papers
Magnetized black holes: interplay between charge and rotation
Vladimir Karas, Zdenek Stuchlik
Already in the cornerstone works on astrophysical black holes published as early as in 1970s, Ruffini and collaborators have revealed potential importance of an intricate interacti…
Near-horizon structure of escape zones of electrically charged particles around weakly magnetized rotating black hole: case of oblique magnetosphere
Vladimir Karas, Ondrej Kopacek
We study the effects of large scale magnetic fields on the dynamics of charged particles near a rotating black hole. We consider a scenario in which the initially neutral particles…
Charged fluids encircling compact objects: force representations and conformal geometries
Jiří Kovář, Yasufumi Kojima, Petr Slaný +2
Charged fluids rotating around compact objects can form unique equilibrium structures when ambient large-scale electromagnetic fields combine with strong gravity. Equatorial as wel…
Near-horizon structure of escape zones of electrically charged particles around weakly magnetized rotating black hole. II. Acceleration and escape in the oblique magnetosphere
Ondřej Kopáček, Vladimír Karas
Strong gravity and magnetic fields are key ingredients that power processes of accretion and ejection near compact objects. While the particular mechanisms that operate here are st…
Interior potential of a toroidal shell from pole values
J. -M. Huré, A. Trova, V. Karas +11
We have investigated the toroidal analog of ellipsoidal shells of matter, which are of great significance in Astrophysics. The exact formula for the gravitational potential $Ψ(R,Z)…
Emergence of magnetic null points in electro-vacuum magnetospheres of compact objects: The case of a plunging neutron star
Ondřej Kopáček, Tayebeh Tahamtan, Vladimír Karas
Relativistic effects of compact objects onto electromagnetic fields in their vicinity are investigated using the test-field approximation. In particular, we study the possible emer…