The main purpose of this article is to present in one place the recent progress in the field of
astrophysics of rotating black holes in electromagnetic fields in connection with the Penrose …

This is the first of two papers on the energy-extraction processes near a Kerr black hole
immersed in a magnetic field. In this paper we shall consider the consequences of a dipole …

We have studied in detail the energetics of Kerr-Newman black hole by the Penrose process
using charged particles. It turns out that the presence of electromagnetic field offers very …

This is the second of two papers on energy-extraction processes near a Kerr black hole
immersed in a magnetic field. A convenient formalism for discussing energy extraction by the …

In the case involving particles, the necessary and sufficient condition for the Penrose
process to extract energy from a rotating black hole is absorption of particles with negative …

The effective ergospheres of neutral and charged particles near a rotating black hole in a
uniform external magnetic field are described. The magnetic field changes the chemical …

By utilizing the curious existence of negative energy orbits outside the event horizon of the
Kerr black hole, Penrose proposed that rotational energy of the black hole can be extracted …

The energy extraction process from Kerr black holes is elucidated compared with that from
pulsars in force-free degenerate electrodynamics (FFDE). It is argued for the force-free …

When a rotating black hole is threaded by magnetic field lines supported by external
currents flowing in an equatorial disc, an electric potential difference will be induced. If the …

High efficiency of the Penrose process of energy extraction from rotating black ADS Classic is
now deprecated. It will be completely retired in October 2019. This page will automatically …