181 citations · 1.1k across the 27 of their papers we have counts for
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Charging of rotating black holes: kinetic simulations of black hole magnetospheres
Martin Kološ, Farukh Abdulkhamidov, Arman Tursunov +2
Whether a rotating black hole (BH) immersed in an external magnetic field charges up to the Wald value , where and are the BH mass and spin parameter, and $…
Spinning charged test particle dynamics around a Schwarzschild black hole embedded in a homogeneous magnetic field
Misbah Shahzadi, Martin Kolos, Ondrej Zelenka +1
We study the dynamics of spinning charged test particles orbiting a Schwarzschild black hole immersed in a test uniform magnetic field. This setup provides a simple but physically…
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…
Structure-preserving numerical simulations of test particle dynamics around slowly rotating neutron stars within Hartle-Thorne approach
Misbah Shahzadi, Martin Kolos, Rabia Saleem +2
In this paper, we explore the chaotic signatures of the geodesic dynamics for particles moving in the slowly rotating Hartle-Thorne spacetime; an approximate solution of vacuum Ein…
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…
Testing alternative spacetimes by high-frequency quasi-periodic oscillations observed in microquasars and active galactic nuclei
Misbah Shahzadi, Martin Kološ, Rabia Saleem +1
In this article, we try to capture the influence of deviation from standard Kerr black hole spacetime on observed high-frequency quasi-periodic oscillations signal. We explore the…
Charged particle dynamics in parabolic magnetosphere around Schwarzschild black hole
Martin Kološ, Misbah Shahzadi, Arman Tursunov
The study of charged particle dynamics in the combined gravitational and magnetic field can provide important theoretical insight into astrophysical processes around black holes. I…
Testing alternative theories of gravity by fitting the hot-spot data of Sgr A*
Misbah Shahzadi, Martin Kološ, Zdeněk Stuchlík +1
We are fitting dynamics of electrically neutral hot-spot orbiting around Sgr A* source in Galactic center, represented by various modifications of the standard Kerr black hole (BH)…
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…
Radiative Penrose process: Energy Gain by a Single Radiating Charged Particle in the Ergosphere of Rotating Black Hole
Martin Kološ, Arman Tursunov, Zdeněk Stuchlík
We demonstrate an extraordinary effect of energy gain by a single radiating charged particle inside the ergosphere of a Kerr black hole in presence of magnetic field. We solve nume…
Determination of chaotic behaviour in time series generated by charged particle motion around magnetized Schwarzschild black holes
Radim Pánis, Martin Kološ, Zdeněk Stuchlík
We study behaviour of ionized region of a Keplerian disk orbiting a Schwarzschild black hole immersed in an asymptotically uniform magnetic field. In dependence on the magnetic par…
Charged string loops in Reissner-Nordström black hole background
Tursinbay Oteev, Martin Kološ, Zdeněk Stuchlík
We study the motion of current carrying charged string loops in the Reissner-Nordström black hole background combining the gravitational and electromagnetic field. Introducing new…
Radiation reaction of charged particles orbiting magnetized Schwarzschild black hole
Arman Tursunov, Martin Kološ, Zdeněk Stuchlík +1
In many astrophysically relevant situations radiation reaction force acting upon a charge can not be neglected and the question arises about the location and stability of circular…
Acceleration of charged particles due to chaotic scattering in the combined black hole gravitational field and asymptotically uniform magnetic field
Zdeněk Stuchlík, Martin Kološ
To test the role of large-scale magnetic fields in accretion processes, we study dynamics of charged test particles in vicinity of a black hole immersed into an asymptotically unif…
Quasi-harmonic oscillatory motion of charged particles around a Schwarzschild black hole immersed in an uniform magnetic field
Martin Kološ, Zdeněk Stuchlík, Arman Tursunov
In order to test the role of large-scale magnetic fields in quasiperiodic oscillation phenomena observed in microquasars, we study oscillatory motion of charged particles in vicini…
Acceleration of electric current-carrying string loop near a Schwarzschild black hole immersed in an asymptotically uniform magnetic field
Arman Tursunov, Martin Kološ, Zdeněk Stuchlík +1
We study the acceleration of an electric current-carrying and axially-symmetric string loop initially oscillating in the vicinity of a Schwarzschild black hole embedded in an exter…
Acceleration of particles in spacetimes of black string
Arman Tursunov, Martin Kološ, Ahmadjon Abdujabbarov +2
The particle acceleration mechanism in topology, namely in the spacetime of the five-dimensional compact black string has been studied. The expression of c…
Dynamics of current-carrying string loops in the Kerr naked-singularity and black-hole spacetimes
M. Kološ, Z. Stuchlík
Current-carrying string-loop dynamics is studied in the Kerr spacetimes. With attention concentrated to the axisymmetric motion of string loops around symmetry axis of both black-h…
String loops in the field of braneworld spherically symmetric black holes and naked sigularities
Z. Stuchlík, M. Kološ
We study motion of current-carrying string loops in the field of braneworld spherically symmetric black holes and naked singularities. The spacetime is described by the RN geometry…
Acceleration of string loops in the Schwarzschild-de Sitter geometry
Z. Stuchlík, M. Kološ
We study acceleration of current-carrying string loops governed by the presence of an outer tension barrier and an inner angular momentum barrier in the field of Schwarzschild-de S…