11 papers
Shadow signatures and near-horizon energy accumulation in coherent quantum sine-integral black holes
A. Errehymy, Y. Khedif, M. Daoud +4
Quantum modifications of black hole spacetimes can lead to observable departures from the predictions of classical general relativity, particularly in the strong-gravity regime nea…
Coherent quantum state corrections in RN--black holes: Photon dynamics, shadow casts, and energy backreaction
A. Errehymy, Y. Khedif, M. Daoud +4
We revisit the Reissner-Nordström (RN) geometry within the coherent quantum black hole framework, introducing a version that remains well-behaved at short distances while preservin…
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…
Energy-momentum-squared gravity: charged quark star solutions with unified interacting matter
Ayan Banerjee, Bobur Turimov, Javlon Rayimbaev +3
We investigate the equilibrium structure of electrically charged quark stars within the framework of energy-momentum-squared gravity (EMSG), adopting a unified interacting quark-ma…
Joint Constraints on Quantum Oppenheimer--Snyder Black Holes from High-Frequency Quasi-Periodic Oscillations in X-ray Binary Systems and the S2 Star Orbit
A. Errehymy, Y. Khedif, M. Daoud +4
We study a quantum-corrected version of the Oppenheimer--Snyder (OS) spacetime in which classical collapse is modified by a single effective-parameter \(α\), representing small-qua…
Gravitational Wave Standard Sirens as Probes of Lorentz Violation in Bumblebee Gravity
Ayan Banerjee, Bobur Turimov, Francisco Tello-Ortiz +2
Gravitational-wave standard sirens provide a direct measurement of luminosity distance and therefore offer a new way to test gravity over cosmological scales. We use this idea to f…
Observational Constraints on Kazakov-Solodukhin Quantum-Deformed Black Holes from M87 and Sgr A Shadows
A. Errehymy, Y. Khedif, M. Daoud +4
We explore the Kazakov-Solodukhin quantum-deformed black hole spacetime, characterized by a single deformation parameter \( η\) that encodes quantum corrections to the classical Sc…
Slowly rotating traversable wormholes supported by radially varying string-fluid matter: From regular geometries to photon trajectories
A. Errehymy, B. Turimov, M. A. Khan +3
This work investigates slowly rotating traversable wormholes supported by string fluids whose properties vary with distance from the throat. This radial variation allows the matter…
Dymnikova-Schwinger quantum-corrected slowly rotating wormholes: Photon and spinning particle dynamics
A. Errehymy, Y. Khedif, M. Daoud +3
This work studies light propagation near slowly rotating traversable wormholes supported by a quantum-inspired matter source. The model is based on the Dymnikova density profile, v…
Dark Energy Stars in Rastall-Rainbow Gravity: Structure, Stability and Observational Constraints
Ayan Banerjee, Bobur Turimov, Sulton Usanov +3
In this work, we investigate static configurations of dark energy stars within the framework of Rastall-Rainbow (R-R) gravity, which combines an energy-dependent deformation of spa…
Particles acceleration by Bocharova-Bronnikov-Melnikov-Bekenstein black hole
Bobur Turimov, Sulton Usanov, Yokubjon Khamroev
We have studied the motion of massive particles under the influence of scalar and gravitational fields, with particular emphasis on the BBMB black hole. It has been shown that the…