Relativistic magnetohydrodynamical effects of plasma accreting into a black hole
- 15 November 1975
- journal article
- research article
- Published by American Physical Society (APS) in Physical Review D
- Vol. 12 (10), 2959-2962
- https://doi.org/10.1103/physrevd.12.2959
Abstract
By an explicit analytic solution it is shown how, in the accretion of a poloidally magnetized plasma into a Kerr black hole, a torque is exerted on the infalling gas, implying the extraction of rotational energy from the black hole. The torque arises from the twisting of magnetic field lines by the frame-dragging effect. It is also shown how, under suitable conditions, a sizable charge separation can be found in the magnetosphere of accreting black holes and hence an electric charge is expected to be induced on the black hole.Keywords
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