Gravitational lensing by charged black hole with global monopole in the strong field limit
arXiv:2502.11813 · doi:10.1103/PhysRevD.111.084079
Abstract
We investigate gravitational lensing near a charged black hole with a global monopole in the strong field regime, focusing on the combined effects of the global monopole and black hole charge on key observables in gravitational lensing both analytically and numerically. Our results reveal that the dependence of the angular separation on charge is intricately tied to the deficit angle caused by the global monopole. In particular, we identify three critical values of the global monopole parameter that determine whether the angular separation increases monotonically, decreases monotonically, or exhibits extrema as the charge varies. A similar complex dependence is found for the flux ratio as a function of the deficit angle, and for the magnification of the first relativistic image as a function of charge. These behaviors contrast sharply with the monotonic changes observed in the absence of either a global monopole or charge. Our findings highlight that the effects of the charge and global monopole on gravitational lensing cannot be described as simple additive contributions. Instead, their combined effects lead to a rich and interdependent behavior that enhances our understanding of strong-field gravitational lensing. While the charge and global monopole are expected to be small in typical astrophysical contexts, the results presented here could be experimentally explored in analog gravity systems, where these parameters are not constrained. This opens the door to potential experimental verification of the phenomena predicted in this study.
arXiv comment19 pages, 11 figures
References in corpus (29)
- First M87 Event Horizon Telescope Results. VI. The Shadow and Mass of the Central Black Hole
- Analogue Gravity
- Schwarzschild black hole lensing
- Gravitational lensing in the strong field limit
- The geometry of photon surfaces
- Strong field limit of black hole gravitational lensing
- Can we distinguish between black holes and wormholes by their Einstein-ring systems?
- Trapping light by mimicking gravitational lensing
- Quasi-Equatorial Gravitational Lensing by Spinning Black Holes in the Strong Field Limit
- Strong gravitational lensing by braneworld black holes
- Strong deflection limit analysis and gravitational lensing of an Ellis wormhole
- Analytic Kerr black hole lensing for equatorial observers in the strong deflection limit
- Deflection angle in the strong deflection limit in a general asymptotically flat, static, spherically symmetric spacetime
- Kerr black hole lensing for generic observers in the strong deflection limit
- Time Delay in Black Hole Gravitational Lensing as a Distance Estimator
- Braneworld black hole gravitational lens: Strong field limit analysis
- Kerr-Sen dilaton-axion black hole lensing in the strong deflection limit
- Gravitational lensing in the Simpson-Visser black-bounce spacetime in a strong deflection limit
- Polarimetry and Astrometry of NIR Flares as Event Horizon Scale, Dynamical Probes for the Mass of Sgr A*
- Strong Gravitational Lensing by Kiselev Black Hole
- Riemannian geometry of irrotational vortex acoustics
- Strong gravitational lensing by Kerr and Kerr-Newman black holes
- Definite photon deflections of topological defects in metasurfaces and symmetry-breaking phase transitions with material loss
- Holonomy corrected Schwarzschild black hole lensing
- The analytical discussion on strong gravitaional lensing for a gravitational source with a global monopole
- The deflection angle of a gravitational source with global monopole in the strong field limit
- Strong lensing by DHOST black holes
- Topologically Charged Holonomy corrected Schwarzschild black hole lensing
- Null geodesics in extremal Kerr-Newman black holes