Energetics of the Kerr-Newman black hole by the Penrose process

Details Energetics of the Kerr-Newman black hole by the Penrose process Energetics of the Kerr-Newman black hole by the Penrose process

Jun 1985

adsabs.harvard.edu/cgi-bin/nph-data_query?bibcode=1985japa....6...85b&link_type=abstract

Journal of Astrophysics and Astronomy (ISSN 0250-6335), vol. 6, June 1985, p. 85-100.

Astronomy and Astrophysics

Astronomy

10

Black Holes (Astronomy), Charged Particles, Electromagnetic Fields, Galactic Nuclei, Quasars, X Ray Binaries, Angular Momentum, Differential Equations, Hamilton-Jacobi Equation

Scientific paper

The energetics of Kerr-Newman black hole by the Penrose process using charged particles was studied in detail. It turns out that the presence of electromagnetic field offers very favorable conditions for energy extraction by allowing for a region with enlarged negative energy states much beyond r = 2M, and higher negative values for energy. However, when uncharged particles are involved, the efficiency of the process (defined as the gain in energy/input energy) gets reduced by the presence of charge on the black hole in comparison with the maximum efficiency limit of 20.7 percent for the Kerr black hole. This fact is overwhelmingly compensated when charged particles are involved as there exists virtually no upper bound on the efficiency. A specific example of over 100 percent efficiency is given.

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