299 citations · 1.7k across the 35 of their papers we have counts for
37 papers
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 $…
Polarized emission of orbiting hot-spots near Sagittarius A*: effects of electromagnetic interaction
Abylaikhan Tlemissov, Arman Tursunov, Maciek Wielgus
We investigate the polarimetric signatures of orbiting hot-spots around a Schwarzschild black hole in the presence of an external magnetic field, accounting for the electromagnetic…
Interaction of Black Hole Magnetospheres with Inclined Ambient Fields
Madina Zhakipova, Arman Tursunov, Saken Toktarbay +1
Magnetic fields play a central role in black hole astrophysics, powering relativistic jets and other energetic phenomena. While near-horizon magnetic field is usually assumed to or…
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…
Semi-analytic studies of accretion disk and magnetic field geometry in M87*
Saurabh, Maciek Wielgus, Arman Tursunov +2
Context: Magnetic fields play a pivotal role in dynamics of black hole accretion flows and formation of relativistic jets. Observations by the Event Horizon Telescope (EHT) provide…
The CosmoVerse White Paper: Addressing observational tensions in cosmology with systematics and fundamental physics
Eleonora Di Valentino, Jackson Levi Said, Adam Riess +533
The standard model of cosmology has provided a good phenomenological description of a wide range of observations both at astrophysical and cosmological scales for several decades.…
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…
Energetics of Buchdahl stars and the magnetic Penrose process
Sanjar Shaymatov, Naresh Dadhich, Arman Tursunov
Buchdahl star is the most compact object without an event horizon and is an excellent candidate for a black hole mimicker. Unlike black holes, rotating Buchdahl star can be over-ex…
Black hole in a combined magnetic field: ionized accretion disks in the jetlike and looplike configurations
Saltanat Kenzhebayeva, Saken Toktarbay, Arman Tursunov +1
Magnetic fields surrounding black holes are responsible for various astrophysical phenomena related to accretion processes and relativistic jets. Depending on the source, the confi…
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…
Simulation of the isotropic ultra-high energy photons flux in the solar magnetic field and a comparison with observations made by the HAWC and Fermi-LAT observatories
David Alvarez-Castillo, Piotr Homola, Bożena Poncyljusz +37
In this contribution we study the possibility of the formation of cosmic ray ensembles (CRE) created by the interaction of ultra-high energy (UHE) photons with the magnetic field o…
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…
Simulation of the isotropic ultra-high energy photons flux in the solar magnetic field
Bożena Poncyljusz, Tomasz Bulik, Niraj Dhital +17
Both the lack of observation of ultra-high energy (UHE) photons and the limitations of the state-of-the-art methodology being applied for their identification motivate studies on a…
Simulations of Cosmic Ray Ensembles originated nearby the Sun
David E. Alvarez-Castillo, Oleksandr Sushchov, Piotr Homola +30
Cosmic Ray Ensembles (CRE) are yet not observed groups of cosmic rays with a common primary interaction vertex or the same parent particle. One of the processes capable of initiati…
Machine learning aided noise filtration and signal classification for CREDO experiment
Łukasz Bibrzycki, David Alvarez-Castillo, Olaf Bar +10
The wealth of smartphone data collected by the Cosmic Ray Extremely Distributed Observatory(CREDO) greatly surpasses the capabilities of manual analysis. So, efficient means of rej…
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…
Aschenbach effect for spinning particles in Kerr-(A)dS spacetime
Ali Vahedi, Jafar Khodagholizadeh, Arman Tursunov
A non-monotonic behavior of the velocity gradient of a test particle revolving around a rapidly rotating black hole in the locally non-rotating frame of reference is known as the A…
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…
Cosmic Ray Extremely Distributed Observatory
Piotr Homola, Dmitriy Beznosko, Gopal Bhatta +60
The Cosmic Ray Extremely Distributed Observatory (CREDO) is a newly formed, global collaboration dedicated to observing and studying cosmic rays (CR) and cosmic ray ensembles (CRE)…
Supermassive black holes as possible sources of ultra high energy cosmic rays
Arman Tursunov, Zdeněk Stuchlík, Martin Kološ +2
Production and acceleration mechanisms of ultra-high-energy cosmic rays (UHECRs) of energy eV, clearly beyond the GZK-cutoff limit remain unclear that points to exotic na…
Effect of Electromagnetic Interaction on Galactic Center Flare Components
Arman Tursunov, Michal Zajaček, Andreas Eckart +5
Recently, near-infrared GRAVITY@ESO observations at have announced the detection of three bright "flares" in the vicinity of the Galactic center supermassive black…
Particle motion around generic black holes coupled to non-linear electrodynamics
Jaroslav Vrba, Ahmadjon Abdujabbarov, Arman Tursunov +2
We study spherically symmetric magnetically charged generic black hole solutions of general relativity coupled to non-linear electrodynamics (NED). For characteristic values of the…
Fifty years of energy extraction from rotating black hole: revisiting magnetic Penrose process
Arman Tursunov, Naresh Dadhich
Magnetic Penrose process (MPP) is not only the most exciting and fascinating process mining the rotational energy of black hole but it is also the favored astrophysically viable me…
Electric charge of black holes: Is it really always negligible?
Michal Zajaček, Arman Tursunov
We discuss the problem of the third black hole parameter, an electric charge. While the mass and the spin of black holes are frequently considered in the majority of publications,…