11 papers
A causal magnetic black hole with finite self-energy
Mohsen Fathi, Ariel Guzmán, J. R. Villanueva
We construct a nonlinear electrodynamics (NLED) model for a static magnetic black hole. Rather than imposing a regular center, we require a Maxwell weak-field limit, finite magneti…
Constitutive birefringence and critical curves in the rotating GarcÃa--DÃaz black hole
Ariel Guzmán, Mohsen Fathi, J. R. Villanueva
We study high-frequency electromagnetic propagation in the rotating GarcÃa--DÃaz solution of Einstein gravity coupled to NLED. In this system, light is not governed only by the n…
Cosmological evolution driven by polytropic fluids in an inhomogeneous spacetime
Gilberto Aguilar-Pérez, Miguel Cruz, Mohsen Fathi +2
Addressing the late-time accelerated expansion of the universe, known as the "dark energy problem", remains a central challenge in cosmology. While the cosmological constant is the…
Effect of primary scalar hair on black hole's strong lensing in Beyond Horndeski Gravity
Mohsen Fathi
We study the gravitational lensing effects of a static, asymptotically flat black hole with primary scalar hair in Beyond Horndeski gravity, focusing on the strong lensing regime.…
Shadow of a nonlinear electromagnetic generalized Kerr-Newman-AdS black hole
Mohsen Fathi
In this work, we investigate the shadow properties of the Kerr-Newman-Anti-de Sitter black hole coupled to a nonlinear electrodynamics. We construct the shadow by employing the cel…
Shedding Light on Gravity: Black Hole Shadows and Lensing Signatures in Lorentz Gauge Theory
Ali Ãvgün, Mohsen Fathi
Recent advances, including gravitational wave detections and imaging of black hole shadows, have strongly validated general relativity. Nevertheless, ongoing cosmological observati…