115 citations · 800 across the 23 of their papers we have counts for
10 papers · 1 filter
Kinetic formulation of Tolman-Ehrenfest effect: Non-ideal fluids in Schwarzschild and Kerr space-times
Claudio Cremaschini, Jiří Kovář, Zdeněk Stuchlík +1
A review of the original thermodynamic formulation of the Tolman-Ehrenfest effect prescribing the temperature profile of uncharged fluid at thermal equilibrium forming stationary c…
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…
Application of a symplectic integrator in a non-integrable relativistic system
Ondřej Kopáček, Vladimír Karas, Jiří Kovář +1
We present a detailed comparison of several integration schemes applied to the dynamic system consisting of a charged particle on the Kerr background endowed with the axisymmetric…
Electrically charged matter in rigid rotation around magnetized black hole
Jiří Kovář, Petr Slaný, Claudio Cremaschini +3
We study charged-fluid toroidal structures surrounding a non-rotating charged black hole immersed in a large-scale, asymptotically uniform magnetic field. In continuation of our fo…
Regular and chaotic orbits near a massive magnetic dipole
Jiří Kovář, Ondřej Kopáček, Vladimí Karas +1
Within the framework of Bonnor's exact solution describing a massive magnetic dipole, we study the motion of neutral and electrically charged test particles. In dependence on the B…
Pseudo-Newtonian and general relativistic barotropic tori in Schwarzschild-de Sitter spacetimes
Z. Stuchlik, P. Slany, J. Kovar
Pseudo-Newtonian gravitational potential introduced in spherically symmetric black-hole spacetimes with a repulsive cosmological constant is tested for equilibrium toroidal configu…
Pseudo-Newtonian gravitational potential for Schwarzschild-de Sitter spacetimes
Zdenek Stuchlik, Jiri Kovar
Pseudo-Newtonian gravitational potential describing the gravitational field of static and spherically symmetric black holes in the universe with a repulsive cosmological constant i…
Optical reference geometry and inertial forces in Kerr-de Sitter spacetimes
Jiri Kovar, Zdenek Stuchlik
Optical reference geometry and related concept of inertial forces are investigated in Kerr-de Sitter spacetimes. Properties of the inertial forces are summarized and their typical…
Equilibrium conditions of spinning test particles in Kerr-de Sitter spacetimes
Zdenek Stuchlik, Jiri Kovar
Equilibrium conditions and spin dynamics of spinning test particles are discussed in the stationary and axially symmetric Kerr-de Sitter black-hole or naked-singularity spacetimes.…
Forces in Kerr spacetimes with a repulsive cosmological constant
Jiri Kovar, Zdenek Stuchlik
Forces defined in the framework of optical reference geometry are introduced in the case of stationary and axially symmetric Kerr black-hole and naked-singularity spacetimes with a…