2 papers
gr-qc2026
Universal Bounds on Horizons, Photon Spheres, and Shadows: The Role of Energy Conditions in Spherically Symmetric Black Holes
Vitalii Vertogradov
In this work, we derive rigorous and universal bounds on the geometric characteristics of black holes in asymptotically flat spacetimes under assumptions that weak energy condition…
gr-qc2024
On Geodesic motion of particles with zero energy in Kerr and rotating dirty black holes
Vitalii Vertogradov, Leonid Shleiger
In this work, we explore the properties of timelike geodesic for particles with zero energy. We found some similarities between geodesic motion in Schwarzschild black hole and time…