320 citations · 6.9k across the 163 of their papers we have counts for
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Appearance of Keplerian discs orbiting on both sides of a reflection-symmetric wormhole
Jan Schee, Zdeněk Stuchík
We construct optical appearance and profiled spectral lines of Keplerian discs with inner edge at the innermost circular geodesic located on both sides of the reflection-symmetric…
Strong gravitational lensing around Kehagias-Sfetsos compact objects surrounded by plasma
Sudipta Hensh, Jan Schee, Ahmadjon Abdujabbarov +1
We present the analysis how Hořava gravity and plasma influence the strong lensing phenomena around Kehagias-Sfetsos (KS) black holes. Using the semi-analytical Bozza method of str…
Epicyclic orbits in the field of Einstein-Dirac-Maxwell traversable wormholes applied to the quasiperiodic oscillations observed in microquasars and active galactic nuclei
Zdeněk Stuchlík, Jaroslav Vrba
We study the epicyclic oscillatory motion around circular orbits of the traversable asymptotically flat and reflection-symmetric wormholes obtained in the Einstein-Dirac-Maxwell th…
Electric Penrose process: high-energy acceleration of ionized particles by non-rotating weakly charged black hole
Arman Tursunov, Bakhtinur Juraev, Zdeněk Stuchlík +1
In many astrophysical scenarios the charge of the black hole is often neglected due to unrealistically large values of the charge required for the Reissner-Nordström spacetime metr…
Trapping of null geodesics in slowly rotating extremely compact Tolman VII spacetimes
Zdeněk Stuchlík, Jaroslav Vrba
Region of trapped null geodesics hidden inside of extremely compact objects is of astrophysical importance because of trapping of gravitational waves, or neutrinos. The trapping ef…
General relativistic rotational energy extraction from black holes-accretion disk systems
D. Pugliese, Z. Stuchlik
We constrain the BHs spin with the evaluation of the dimensionless parameter ξ, the total rotational energy extracted versus the BH mass. The energy extraction can power an outflow…
Jet collision with accreting tori around SMBHs. GRHD and light surfaces constraints in aggregates of misaligned tori
D. Pugliese, Z. Stuchlik
We explore the possibility of jet collisions with accreting tori orbiting around SMBHs. The analysis provides constraints on formation and the observational evidences of the host c…
Wormholes without exotic matter: quasinormal modes, echoes and shadows
M. S. Churilova, R. A. Konoplya, Z. Stuchlik +1
An analytical solution representing traversable asymptotically flat and symmetric wormholes was obtained without adding exotic matter in two different theories independently: in th…
Neutrino trapping in extremely compact Tolman VII spacetimes
Zdeněk Stuchlík, Jan Hladík, Jaroslav Vrba +1
Extremely compact objects trap gravitational waves or neutrinos, assumed to move along null geodesics in the trapping regions. The trapping of neutrinos was extensively studied for…
Epicyclic oscillations in spinning particle motion around Kerr black hole applied in models fitting the quasi-periodic oscillations observed in quasars and microquasars
Misbah Shahzadi, Martin Kološ, Zdeněk Stuchlík +1
The study of the quasi-periodic oscillations (QPOs) of X-ray flux observed in the stellar-mass black hole (BH) binaries or quasars can provide a powerful tool for testing the pheno…
Kerr-de Sitter Black Hole Revisited
J. Ovalle, E. Contreras, Z. Stuchlik
We interpret the cosmological constant as the energy of the vacuum, and under a minimum amount of assumptions, we show that it is deformed in the vicinity of a black hole. This lea…
Geodesic Structure of the Accelerated Stephani Universe
Irina Bormotova, Elena Kopteva, Zdenek Stuchlik
For the spherically symmetric Stephani cosmological model with an accelerated expansion, we investigate the main scenarios of the test particle and photon motion. We show that a co…