3 papers
gr-qc2026
Photon spheres in dynamical space-times
David Díaz-Guerra, Ángel Rincón, Diego Rubiera-Garcia
The characterization of the photon region -- i.e. the region of space-time filled with unstable bound null geodesics -- is critical to understand the behavior of radiation near a c…
gr-qc2025
Charged black holes in Kalb-Ramond gravity: Weak Deflection Angle, Shadow cast, Quasinormal Modes and Neutrino annihilation
Reggie C. Pantig, Ali Övgün, Ángel Rincón
In this paper, we investigate the phenomenology of electrically charged black holes in a Lorentz-violating gravitational framework mediated by a background Kalb-Ramond (KR) antisym…
astro-ph.CO2018
Growth index and statefinder diagnostic of Oscillating Dark Energy
Grigoris Panotopoulos, Ángel Rincón
We study is some detail the Cosmology of Oscillating Dark Energy described by concrete equations-of-state investigated recently in the literature. In particular, at the background…