5 citations · 9 across the 25 of their papers we have counts for
31 papers
Effect of induced frame dragging on energy extraction from axially symmetric magnetized Reissner-Nordström BH and observational benchmarks
Ikhtiyor Eshtursunov, Chen Zhou, Sanjar Shaymatov +2
In this paper, we probe the effect of induced frame dragging on the energy extraction process via magnetic reconnection in axially symmetric magnetized Reissner-Nordström black hol…
Optical Signatures of a Black Hole in Effective Quantum Gravity
Jonibek Khasanov, Xuwei Zhang, Mirzabek Alloqulov +3
In this article, we present an investigation of observational signatures of a black hole (BH) in effective quantum gravity (EQG), particularly gravitational weak lensing and shadow…
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…
Periodic orbits and gravitational wave signatures from magnetic dipoles around magnetized Kerr black holes
Shokhzod Jumaniyozov, Javlon Rayimbaev, Chengxun Yuan +3
We study periodic orbits and the associated gravitational radiation of a magnetized (uncharged) test particle carrying a magnetic dipole moment with coupling constant beta, moving…
Constraining ModMax Black Holes with EHT and GRAVITY Observations: Optical Signatures and Accretion Disk Properties
Tursunali Xamidov, Mirjavoxir Mirkhaydarov, Sanjar Shaymatov +2
In this work, we study photon propagation and the radiative properties of a thin accretion disk around a ModMax black hole and examine the effects of the charge (i.e. $Q^2 = Q^…
Probing scalarized wormholes through quasi-periodic oscillations and spinning particle dynamics
Asalkhon Alimova, Akbar Davlataliev, Farruh Atamurotov +3
We investigate the dynamics of test particles in a three-parameter scalarized wormhole spacetime within Einstein-scalar field theory. For spinless particles, we derive the orbital…
Thermal Alignment as a Pathway to Axion Dark Matter
Imtiaz Khan, G. Mustafa, Chengxun Yuan +3
Thermal alignment cannot be inferred from the axion mean alone because the dissipative bath that erases the initial displacement also prepares field and momentum fluctuations. We d…
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…
Extending the Comisso-Asenjo Energy Extraction Mechanism to Pure Lovelock Gravity
Chen Zhou, Ikhtiyor Eshtursunov, Sanjar Shaymatov +1
In this paper, we extend the Comisso-Asenjo magnetic reconnection (MR) mechanism to rotating black holes (BHs) in pure Lovelock/Gauss-Bonnet (GB) gravity in dimension $2N+2\leq D\l…
Gravitational wave signatures of magnetized Ernst black hole
Fazlay Ahmed, Sanjar Shaymatov, Chengxun Yuan +1
We investigate gravitational wave (GW) emission from periodic timelike orbits of a test particle around a magnetized Ernst black hole and the gravitational waveforms generated by t…
Probing Quantum Gravity through Chaotic Orbits and Strong-Field Effects in Kerr Black Holes Embedded in Perfect Fluid Dark Matter
Shubham Kala, Sara Saghafi, M. Yousaf +4
We study the nonlinear photon dynamics in quantum improved rotating black hole surrounded by perfect fluid dark matter (PFDM) using several methods of analysis, including Poincaré…
Magnetically charged spinning particles around a regular black hole: constraints on the monopole charge from quasi-periodic oscillations
Shokhzod Jumaniyozov, Javlon Rayimbaev, Chengxun Yuan +4
We investigate the dynamics of magnetically charged spinning test particles in the spacetime of the Bardeen regular black hole, sourced by nonlinear electrodynamics and featuring a…
Scalar and Electromagnetic Perturbations around a Black Hole with a Topological Defect: Quasinormal Modes and Quasi-bound States in a Plasma Medium
Dilmurod Umarov, Farruh Atamurotov, Ahmadjon Abdujabbarov +2
We investigated the influence of a plasma environment on the optical and perturbative properties of a black hole with a topological defect, characterized by the parameter \(k\). We…
CMB Test of the Higgs Origin of Dark-Photon Dark Matter
Imtiaz Khan, Salvatore Capozziello, G. Mustafa +2
Laboratory searches determine the mass and kinetic mixing of dark-photon dark matter. The CMB isocurvature probes how its abundance depends on inflationary initial conditions. We f…
Long Inflation Screens Euclidean-Wormhole Initial States
Imtiaz Khan, Pirzada, G. Mustafa +2
Euclidean wormholes can prepare inflation in non--Bunch--Davies initial states, but long Lorentzian expansion screens this memory from the CMB. We derive a visibility bound for Euc…
Magnetic reconnection in five-dimensional Kerr black hole
Ikhtiyor Eshtursunov, Sanjar Shaymatov, Chengxun Yuan
In this paper, we employ the Comisso-Asenjo magnetic reconnection (MR) mechanism to investigate energy extraction from a rapidly rotating five-dimensional Kerr black hole (BH) with…
Dilaton-Induced Resonant Production of Ultralight Vector Dark Matter
Imtiaz Khan, G. Mustafa, Jehanzad Zafar +3
A dilatonic half-mass resonance can produce ultralight vector dark matter only if the Floquet instability becomes efficient before the oscillating spectator scalar dominates the co…
Repetitive Penrose Process in Kerr-Taub-NUT black hole spacetime
Mirzabek Alloqulov, Bobomurat Ahmedov, Chengxun Yuan
In this article, we study the repetitive Penrose process for the Kerr-Taub-NUT black hole (BH). First of all, we briefly review the spacetime of the Kerr-Taub-NUT BH, including hor…
Chaotic motion and power spectral density in Schwarzschild Bertotti-Robinson black hole spacetime
Yunqiao Xu, Uktamjon Uktamov, Pierros Ntelis +3
In this paper, we show that in weak field limit Schwarzschild Bertotti-Robinson black hole (Schwarzschild-BR BH) turns into Schwarzschild black hole immersed in external uniform ma…
Plasma impact on black hole shadow and gravitational weak lensing for Schwarzschild-like black hole
Weiqiang Yang, Mirzabek Alloqulov, Ahmadjon Abdujabbarov +3
This article delves into the observational properties of a Schwarzschild-like black hole (BH). Initially, the research provides a succinct examination of the spacetime geometry and…
Spherically-symmetrical vacuum solution in Freund-Nambu scalar-tensor gravity
Akbar Davlataliev, Bobur Turimov, Bobomurat Ahmedov +3
Scalar--tensor theories of gravity provide a natural extension of general relativity and may predict naked singularities as alternative compact objects. In this work, we investigat…
Effect of gravitational lensing around black hole in dark matter halo in the presence of plasma
Zhiyu Dou, Akbar Davlataliev, Mirzabek Alloqulov +4
This article is devoted to the investigation of the observational properties of the Schwarzschild black hole (BH) surrounded by a dark matter (DM) halo. Our study commences with a…
Relativistic Dynamics and Bondi-Hoyle-Lyttleton Accretion onto Rotating Embedded Black Hole Models
Asifa Ashraf, Orhan Donmez, Abdelmalek Bouzenada +4
In this paper, we examine the motion of test particles and relativistic accretion mechanisms within the spacetime of a rotating and embedded BH. In this case, the geometric propert…