44 citations · 64 across the 6 of their papers we have counts for
6 papers
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…
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…
On particle collisions in the vicinity of the charged black holes
Timur Pryadilin, Daniil Zhitov, Vitalii Vertogradov
The process of particle collision in the vicinity of black holes is known to generate unbounded energies in the center-of-mass frame (the Banados-Silk-West (BSW) effect) under spec…
Geodesics for particles with negative energy in Kerr's metric
Vitalii Vertogradov
According to Penrose effect, particles with negative energy can exist in the ergospheres of rotating black holes. We analyze geodesics for such particles and show that there are no…
The Forces outside the static limit in the rotating frame
Andrei Grib, Vitalii Vertogradov, Ivan Fedorov
In this paper we consider the rotating frame of the Minkowski spacetime in order to describe the inertial forces outside the static limit. We consider the inertial forces inside th…
Geodesics with negative energy in the ergosphere of rotating black holes
A. A. Grib, Yu. V. Pavlov, V. D. Vertogradov
It is shown that the geodesics with negative energy for rotating black holes cannot originate or terminate inside the ergosphere. Their length is always finite and this leads to co…