187 citations · 318 across the 12 of their papers we have counts for
12 papers
Observational signatures of misaligned double-ring and double-torus configurations around a Schwarzschild black hole
Dmitriy Ovchinnikov, Jan Schee, Zdeněk Stuchlík
We investigate the observational signatures of an idealized double-ring and double-torus system orbiting a Schwarzschild black hole, allowing the two emitting components to have mu…
Dynamical and observational properties of weakly Proca-charged black holes
Abylaikhan Tlemissov, Arman Tursunov, Jiří Kovář +1
The simplest approach to include a mass into the electromagnetic vector potential is to modify the Einstein-Maxwell action to the Einstein-Proca form. There are currently no exact…
Deterministic and Stochastic Study of the X-ray Emission from the TeV Blazar Mrk~421
Radim Pánis, Gopal Bhatta, Tek P. Adhikari +6
We present a comprehensive timing analysis of X-ray data from the {\it XMM-Newton} satellite, examining 50 light curves covering 17 years of observations of the blazar Mrk~421. Thi…
Radiative Back-Reaction on Charged Particle Motion in the Dipole Magnetosphere of Neutron Stars
Zdeněk Stuchlík, Jaroslav Vrba, Martin Kološ +1
The motion of charged particles under the Lorentz force in the magnetosphere of neutron stars, represented by a dipole field in the Schwarzschild spacetime, can be determined by an…
Light escape cones in the locally non-rotating reference frames of the Kerr-de Sitter superspinars and related superspinar shadows
Daniel Charbulák, Zdeněk Stuchlík
The construction of local escape cones and their complementary cones, related to the locally non-rotating frames (LNRFs) orbiting superspinars with the external field described by…
Radiating particle in the vicinity of the weakly charged Schwarzschild black hole
Bakhtinur Juraev, Zdeněk Stuchlík, Arman Tursunov +1
It is well known that supermassive black holes in the centers of galaxies are capable of accelerating charged particles to very high energies. In many cases, the particle accelerat…
String loop vibration around Schwarzschild black hole
Mariia Churilova, Martin Kološ, Zdeněk Stuchlík
String loop vibrations in a central plane of a Schwarzschild black hole are investigated for various string equations of state. We discuss string loop stability and derive frequenc…
Timing of echoes in electromagnetic radiation from hot spots orbiting a Kerr black hole impostor
Sudipta Hensh, Jan Schee, Zdeněk Stuchlík
We investigate the light curve of an isolated bright spot in a Keplerian orbit around a Kerr black hole candidate to probe possible deviations from the standard event-horizon pictu…
Detection of chaotic behavior in time series
Radim Pánis, Martin Kološ, Zdeněk Stuchlík
Deterministic chaos is phenomenon from nonlinear dynamics and it belongs to greatest advances of twentieth-century science. Chaotic behavior appears apart of mathematical equations…
Controversy of the GRO J1655-40 black hole mass and spin estimates and its possible solutions
Zdeněk Stuchlík, Martin Kološ
Estimates of the black hole mass and dimensionless spin in the microquasar GRO J1655-40 implied by strong gravity effects related to the timing and spectral measurements ar…
Models of quasi-periodic oscillations related to mass and spin of the GRO J1655-40 black hole
Zdeněk Stuchlík, Martin Kološ
Frequencies of the three quasi-periodic oscillation (QPO) modes observed simultaneously in the accreting black hole GRO J1655-40 are compared with the predictions of models. Models…
Circular orbits and related quasi-harmonic oscillatory motion of charged particles around weakly magnetized rotating black holes
Arman Tursunov, Zdeněk Stuchlík, Martin Kološ
We study motion of charged particles in the field of a rotating black hole immersed into an external asymptotically uniform magnetic field, focusing on the epicyclic quasi-circular…