Super-Penrose process for nonextremal black holes
O. B. Zaslavskii
Institute of Astronomy, Kharkov V. N. Karazin National University, 61022 Kharkov, Ukraine
Institute of Mathematics and Mechanics, Kazan Federal University, 420008 Kazan, Russia
Abstract
We consider particle collisions in the background of nonextremal spherically
symmetric static black holes. It is shown that debris of collision can have indefinitely
large energy at infinity, i.e. the super-Penrose process (SPP) can occur. This property
is sharply contrasted with that of rotating black holes for which it is already
established that the SPP is forbidden. The Reissner-Nordstrom black hole serves as
an example. If an external central force exerts on particles, even the Schwarzschild
background is suitable for the SPP.