Horizon-Brightened Acceleration Radiation and Optical Signatures of Generic Regular Black Holes from Nonlinear Electrodynamics

Abstract

We investigate horizon-brightened acceleration radiation (HBAR) and optical signatures for a broad class of regular black holes sourced by nonlinear electrodynamics. The spacetimes considered are static, spherically symmetric, and nonsingular, and they include Bardeen-like, and Hayward-like regular black-hole limits as spacial cases. We characterize the horizon structure and thermodynamics properties, and we compute key optical observables by determining the photon-sphere location and the corresponding shadow size as seen by distant observers, including controlled perturbative limits and full numerical solutions. Using angular-size constraints for SgrA* and M87* from the Event Horizon Telescope and the GRAVITY collaboration, we perform a Markov Chain Monte Carlo analysis to infer the admissible parameter ranges of the model and to quantify degeneracies among the black-hole mass and nonlinear-electrodynimcs parameters. On the quantum side, we develop the near-horizon reduction relevant for HBAR, showing that the dominant sector governing the detector response exhibits conformal behavior and leads to a thermal excitation spectrum governed by the horizon temperature. We formulate a Lindblad master-equation description of the radiation field, identify the thermal steady state, and derive an HBAR entropy-energy relation consistent with a Clausius-type first law. Finally, we establish a Wien-type displacement law for the HBAR spectrum, expressing the peak wavelength in terms of the horizon thermodynamics, thereby providing an additional observable link between nonlinear electrodynamics, regularity, and near-horizon quantum radiation.

15 pages, 10 figures

References in corpus (35)

• The Confrontation between General Relativity and Experiment
• Construction of Regular Black Holes in General Relativity
• How to tell a gravastar from a black hole
• Gravitational lensing by a regular black hole
• A model of nonlinear electrodynamics
• Cosmological Effects of Nonlinear Electrodynamics
• Testing Rotating Regular Metrics as Candidates for Astrophysical Black Holes
• Avoiding singularities in Lorentzian-Euclidean black holes: the role of atemporality
• Relaxations of perturbations of spacetimes in general relativity coupled to nonlinear electrodynamics
• Shadow cast by a rotating charged black hole in quintessential dark energy
• Asymptotic Reissner-Nordström solution within nonlinear electrodynamics
• Charged particle dynamics in parabolic magnetosphere around Schwarzschild black hole
• Nonlinear electrodynamics and black holes
• Null geodesics, causal structure, and matter accretion in Lorentzian-Euclidean black holes
• Equivalence principle and HBAR entropy of an atom falling into a quantum corrected black hole
• Observational signature of Lorentz violation in acceleration radiation
• Circular motion around a regular rotating Hayward black hole
• Atom falling into a quantum corrected charged black hole and HBAR entropy
• Atemporality from Conservation Laws of Physics in Lorentzian-Euclidean Black Hole
• Thermal effect in a causal diamond: open quantum systems approach
• Horizon brightened accelerated radiation in the background of braneworld black holes
• Particle dynamics and the accretion disk around a Self-dual Black Hole immersed in a magnetic field in Loop Quantum Gravity
• Nonthermal acceleration radiation of atoms near a black hole in presence of dark energy
• Orbits of particles with magnetic dipole moment around magnetized Schwarzschild black holes: Applications to S2 star orbit
• Inverse logarithmic correction in the HBAR entropy of an atom falling into a renormalization group improved charged black hole
• Measuring Unruh radiation from accelerated electrons
• Seeing dark matter via acceleration radiation
• Acceleration Radiation from Derivative-Coupled Atoms Falling in Modified Gravity Black Holes
• HBAR entropy of Infalling Atoms into a GUP-corrected Schwarzschild Black Hole and equivalence principle
• Conformal quantum mechanics of causal diamonds: Time evolution, thermality, and instability via path integral functionals
• New analytical model of rotating black hole with dark matter halo: constraints from EHT observations and accretion disk
• Magnetic black holes in 4$D$ Einstein--Gauss--Bonnet massive gravity coupled to nonlinear electrodynamics
• Acceleration Radiation of Freely Falling Atoms: Nonlinear Electrodynamic Effects
• Gravitational Black Hole Shadow Spectroscopy
• The Sound of an Orbit: A Quantum Spectrum at the ISCO