109 citations · 354 across the 15 of their papers we have counts for
24 papers
Quasibound states of charged Dirac fields around Einstein-Euler-Heisenberg black holes
Nodirbek Anarboev, Javlonbek Khasanov, Javlon Rayimbaev +1
We study quasibound states of a massive charged Dirac field on the Einstein--Euler--Heisenberg (EEH) black hole, the extension of Reissner--Nordström (RN) by the leading weak-field…
Boundary-induced corrections to the response of an Unruh-DeWitt detector outside a compact star with Robin surface conditions
Nodirbek Anarboev, Javlonbek Khasanov, Javlon Rayimbaev +1
We formulate the finite-time response problem for a radially accelerated Unruh--DeWitt detector coupled to a real massless scalar field outside a static, spherically symmetric, hor…
Acceleration radiation, quasinormal modes and quasi-bound states in generic rotating regular black holes
Uktamjon Uktamov, Ali Övgün, Reggie C. Pantig +1
We study horizon-brightened acceleration radiation for a neutral scalar field in separable Kerr-like rotating metrics with nonlinear-electrodynamic mass profiles. The principal bra…
Regular black holes do not violate the first law of thermodynamics
Bobir Toshmatov, Bobomurat Ahmedov, Nozima Isamadinova +1
Regular black holes in general relativity coupled to nonlinear electrodynamics have been reported to exhibit an apparent mismatch in their thermodynamics: the temperature obtained…
Electromagnetic quasinormal modes of a Schwarzschild black hole in a superconducting plasma
Bobur Turimov, Akbar Davlataliev, Bobomurat Ahmedov +3
We formulate a generally covariant extension of London electrodynamics in four-dimensional curved spacetime and investigate the propagation of electromagnetic perturbations in a su…
Electrically charged regular black holes in higher dimensions: Maxwellian limit, branch point of the Lagrangian, and thermodynamics
Bobir Toshmatov, Bobomurat Ahmedov, Nozima Isamadinova +2
Electrically charged regular black holes in general relativity coupled to nonlinear electrodynamics are known to require a double-valued Lagrangian density , with a branch po…
Pulsar magnetospheres in dynamical Chern-Simons gravity: deathline conditions and polar-cap particle acceleration
Sherzod Sayfiyev, Bobomurat Ahmedov, Chengxun Yuan +3
The role of surface gravity in neutron stars (NSs) is considerable in the radiation mechanisms of the surrounding plasma magnetosphere near the star surface, as they are highly mag…
Perturbations and quasinormal modes of black holes in general relativity coupled to nonlinear electrodynamics
Uktamjon Uktamov, Bakhtiyor Narzilloev, Ibrar Hussain +2
We investigate the quasinormal spectra and time-domain evolution of scalar, electromagnetic, and gravitational perturbations of the Einstein-Bronnikov black hole in Einstein gravit…
Kerr-referenced analytical parametrization of rotating black holes in dynamical Chern-Simons gravity
Sardor Murodov, Bahodir Ahmedov, Bekzod Rahmatov +2
Rotating black holes in dynamical Chern-Simons gravity are known nonperturbatively mainly through numerical solutions, which limits their direct use in strong-field applications. W…
Weakly nonlinear strong-field signatures of spontaneously vectorized Einstein-vector-Gauss-Bonnet black holes near the Schwarzschild bifurcation
Sardor Murodov, Bekzod Rahmatov, Islom Egamberdiev +3
We study the static, spherically symmetric electric branch of spontaneously vectorized Einstein-vector-Gauss-Bonnet black holes close to its Schwarzschild bifurcation. A weakly non…
Massive neutral Dirac quasibound states in a Newman-Janis-generated rotating charged Kalb-Ramond black-hole geometry
Sardor Murodov, Olimjon Kholturayev, Bahodir Ahmedov +3
We study quasibound states of a massive neutral Dirac field in the Newman-Janis-generated rotating charged geometry used in Lorentz-violating Kalb-Ramond (KR) gravity. Rather than…
Probing Dark Matter and Phantom Field Effects on Neutrino Oscillations around Black Holes
Ikrom Ergashov, Bakhtiyor Narzilloev, Ibrar Hussain +1
This study investigates how dark matter in the background of the phantom field (DMPF) near a black hole influences neutrino flavor oscillations using a two-flavor model. It is foun…
Horizon-Brightened Acceleration Radiation and the Deflection Angle Near a Degenerate Photon Sphere of Schwarzschild-like Quantum-Corrected Black Hole
Yunqiao Xu, Uktamjon Uktamov, Bobomurat Ahmedov +1
We investigate horizon-brightened acceleration radiation (HBAR) and a strong-deflection expansion for the deflection angle of light rays scattered in the vicinity of a degenerate p…
Radiation properties of the accretion disk around a black hole in Einstein-Maxwell-scalar theory
Mirzabek Alloqulov, Sanjar Shaymatov, Bobomurat Ahmedov +1
In this study, we explore the properties of a non-rotating black hole in the Einstein-Maxwell-scalar (EMS) theory and investigate the luminosity of the accretion disk surrounding i…
Tidal forces in parametrized spacetime: Rezzolla-Zhidenko parametrization
Bobir Toshmatov, Bobomurat Ahmedov
We investigate the tidal forces exerted by a spherically symmetric static parametrized black hole. Our analysis reveals that the radial and angular components of the tidal forces e…
Bardeen spacetime as a quantum corrected Schwarzschild black hole: Quasinormal modes and Hawking radiation
R. A. Konoplya, D. Ovchinnikov, B. Ahmedov
The Bardeen black hole holds historical significance as the first model of a regular black hole. Recently, there have been proposed interpretations of the Bardeen spacetime as quan…
On the parameters of the spherically symmetric parametrized Rezzolla-Zhidenko spacetime through solar system tests, orbit of S2 star about Sgr A, and quasiperiodic oscillations
Sanjar Shaymatov, Bobomurat Ahmedov, Mariafelicia De Laurentis +4
In this paper, we find the higher order expansion parameters and of spherically symmetric parametrized Rezzolla--Zhidenko (PRZ) spacetime by using its functions of the radi…
Overcharging process around a magnetized black hole: Can the backreaction effect of magnetic field restore cosmic censorship conjecture?
Sanjar Shaymatov, Bobomurat Ahmedov
It is well known that the electrically charged Reissner-Nordström black hole could be overcharged. Here, we investigate the process of overcharging of a magnetized Reissner-Nordstr…
Particle motion around a static axially symmetric wormhole
Bakhtiyor Narzilloev, Daniele Malafarina, Ahmadjon Abdujabbarov +2
We consider the properties of a static axially symmetric wormhole described by an exact solution of Einstein's field equations and investigate how we can distinguish such a hypothe…
Test particle motion around black hole in Einstein-Maxwell-scalar theory
Bobur Turimov, Javlon Rayimbayev, Ahmadjon Abdujabbarov +2
In this paper, we explore the test particle motion around a black hole in Einstein-Maxwell-scalar (EMS) theory using three different black hole solutions within this theory. We hav…
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…
Six-dimensional Myers-Perry rotating black hole cannot be overspun
Sanjar Shaymatov, Naresh Dadhich, Bobomurat Ahmedov
Though under nonlinear accretion, all black holes in four and higher dimensions obey the weak cosmic censorship conjecture (CCC); however, they generally violate it for linear test…
Five dimensional charged rotating minimally gauged supergravity black hole cannot be over-spun and/or over-charged in non-linear accretion
Sanjar Shaymatov, Naresh Dadhich, Bobomurat Ahmedov +1
Generally black hole could be over charged/spun violating the weak cosmic censorship conjecture (WCCC) for linear order accretion while the same is always restored back for non-lin…
Testing Cosmic Censorship Conjecture for Extremal and Near-extremal (2+1)-dimensional MTZ Black Holes
Koray Düztaş, Mubasher Jamil, Sanjar Shaymatov +1
We test the validity of the weak cosmic censorship conjecture for the ()-dimensional charged anti-de Sitter black hole solution, which was derived by Martinez, Teitelboim, and…