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Black Holes Admitting Strong Resonant Phenomena
Zdenek Stuchlik, Andrea Kotrlova, Gabriel Torok
High-frequency twin peak quasiperiodic oscillations (QPOs) are observed in four microquasars, i.e., Galactic black hole binary systems, with frequency ratio very close to 3:2. In t…
Profiles of emission lines generated by rings orbiting braneworld Kerr black holes
Jan Schee, Zdenek Stuchlik
In the framework of the braneworld models, rotating black holes can be described by the Kerr metric with a tidal charge representing the influence of the non-local gravitational (t…
Quasiperiodic oscillations in a strong gravitational field around neutron stars testing braneworld models
Andrea Kotrlova, Zdenek Stuchlik, Gabriel Torok
The strong gravitational field of neutron stars in the brany universe could be described by spherically symmetric solutions with a metric in the exterior to the brany stars being o…
Mass estimate of the XTE J1650-500 black hole from the Extended Orbital Resonance Model for high-frequency QPOs
Petr Slany, Zdenek Stuchlik
XTE J1650-500 is a Galactic black-hole binary system for which at least one high-frequency QPO at 250Hz was reported. Moreover there are indications that the system harbours a near…
Influence of the relict cosmological constant on accretion discs
Z. Stuchlik
Surprisingly, the relict cosmological constant has a crucial influence on properties of accretion discs orbiting black holes in quasars and active galactic nuclei. We show it by co…
Off-equatorial orbits in strong gravitational fields near compact objects
Jiri Kovar, Zdenek Stuchlik, Vladimir Karas
Near a black hole or an ultracompact star, motion of particles is governed by strong gravitational field. Electrically charged particles feel also electromagnetic force arising due…