期刊
MONTHLY NOTICES OF THE ROYAL ASTRONOMICAL SOCIETY
卷 478, 期 1, 页码 L89-L94出版社
OXFORD UNIV PRESS
DOI: 10.1093/mnrasl/sly073
关键词
black hole physics; magnetic field; relativistic processes
资金
- Czech Science Foundation [14-37086G, 16-03564Y]
- Silesian University [SGS/14/2016]
- German Academic Exchange Service DAAD
- Uzbekistan Ministry for Innovation Development [VA-FA-F-2-008, YFA-Ftech-2018-8]
- Abdus Salam International Centre for Theoretical Physics [OEA-NT-01]
- SU
- NUUz
In this Letter, we wish to point out that the distinguishing feature of magnetic Penrose process (MPP) is its super high-efficiency exceeding 100 per cent (which was established in mid 1980s for discrete particle accretion) of extraction of rotational energy of a rotating black hole electromagnetically for a magnetic field of milli Gauss order. Another similar process, which is also driven by the electromagnetic field, is Blandford-Znajek mechanism (BZ) that could be envisaged as high magnetic field limit MPP as it requires threshold magnetic field of order 10(4) G. Recent simulation studies of fully relativistic magnetohydrodynamic (MHD) flows have borne out super high-efficiency signature of the process for high magnetic field regime; viz BZ. We would like to make a clear prediction that similar simulation studies of MHD flows for low magnetic field regime, where BZ would be inoperative, would also have superefficiency.
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