The distinguishing signature of magnetic Penrose process

@article{30309,
   author = {Dadhich, Naresh and Tursunov, Arman and Ahmedov, Bobomurat and Stuchlík, Zdeněk},
   article_number = {1},
   doi = {http://dx.doi.org/10.1093/mnrasl/sly073},
   keywords = {black hole physics; magnetic field; relativistic processes},
   language = {eng},
   issn = {0035-8711},
   journal = {Monthly Notices of the Royal Astronomical Society Letters},
   title = {The distinguishing signature of magnetic Penrose process},
   url = {https://academic.oup.com/mnrasl/article-abstract/478/1/L89/4990554?redirectedFrom=fulltext},
   volume = {478},
   year = {2018}
}

TY  - JOUR
ID  - 30309
AU  - Dadhich, Naresh - Tursunov, Arman - Ahmedov, Bobomurat - Stuchlík, Zdeněk
PY  - 2018
TI  - The distinguishing signature of magnetic Penrose process
JF  - Monthly Notices of the Royal Astronomical Society Letters
VL  - 478
IS  - 1
SP  - "L89"-"L94"
EP  - "L89"-"L94"
SN  - 00358711
KW  - black hole physics
KW  - magnetic field
KW  - relativistic processes
UR  - https://academic.oup.com/mnrasl/article-abstract/478/1/L89/4990554?redirectedFrom=fulltext
L2  - https://academic.oup.com/mnrasl/article-abstract/478/1/L89/4990554?redirectedFrom=fulltext
N2  - 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 super efficiency.
ER  - 

DADHICH, Naresh, Arman TURSUNOV, Bobomurat AHMEDOV a Zdeněk STUCHLÍK. The distinguishing signature of magnetic Penrose process. \textit{Monthly Notices of the Royal Astronomical Society Letters}. roč.~478, č.~1, s.~''L89''-''L94'', 6 s. ISSN~0035-8711. doi:10.1093/mnrasl/sly073. 2018.