11 papers
Circular orbits in spherically symmetric spacetimes and BSW effect with nonzero force
Hryhorii Ovcharenko, O. B. Zaslavskii
We consider circular particle motion under the action of an unspecified force in a static spherically symmetric spacetime. We derive the machinery that allows one to find the force…
Generalized Lemaître time for rotating and charged black holes and its near-horizon properties
A. V. Toporensky, O. B. Zaslavskii
We consider the behavior of the analogue of the Lemaitre time when a particle approaches the horizon of a rotating black hole. For the Kerr metric, the aforementioned time coincide…
Inverted equation of state and general approach to vacuum-like configurations
O. B. Zaslavskii
We consider spherically symmetric static black hole configurations that obey the vacuum equation of state: , where is the radial pressure, being energy dens…
Recursive Penrose processes in electrically charged black hole spacetimes: Backreaction and energy extraction
Duarte Feiteira, José P. S. Lemos, Oleg B. Zaslavskii
We study a recursive Penrose process and the energy extraction for the decay of electrically charged particles in a Reissner-Nordström black hole spacetime with anti-de Sitter (Ad…
High energy particle collisions under Cauchy horizon
A. V. Toporensky, O. B. Zaslavskii
We consider particle collision inside the inner horizon of the Reissner-Nordstrom metric in the so-called R region. We show that there exist scenario in which the enrgy in the cent…
Near-horizon behavior of nonequatorial accelerated particle motion and high energy particle collisions
H. V. Ovcharenko, O. B. Zaslavskii
We consider motion of a particle in the background of a stationary axially symmetric generic black hole. A particle experiences the action of a force of unspecified nature. We requ…