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

Bhat, Manjiri ; Dhurandhar, Sanjeev ; Dadhich, Naresh (1985) Energetics of the Kerr-Newman black hole by the Penrose process Journal of Astrophysics & Astronomy, 6 (2). pp. 85-100. ISSN 0250-6335

PDF - Publisher Version

Official URL: http://www.ias.ac.in/jarch/jaa/6/85-100.pdf


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 favourable 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 per cent 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 per cent efficiency is given.

Item Type:Article
Source:Copyright of this article belongs to Indian Academy of Sciences.
Keywords:Black Hole Energetics; Kerr-newman Black Hole; Penrose Process; Energy Extraction
ID Code:87713
Deposited On:21 Mar 2012 09:54
Last Modified:19 May 2016 02:56

Repository Staff Only: item control page