Relativistic magnetohydrodynamical effects of plasma accreting into a black hole

Details Relativistic magnetohydrodynamical effects of plasma accreting into a black hole Relativistic magnetohydrodynamical effects of plasma accreting into a black hole

Nov 1975

adsabs.harvard.edu/cgi-bin/nph-data_query?bibcode=1975phrvd..12.2959r&link_type=abstract

Physical Review D - Particles and Fields, 3rd Series, vol. 12, Nov. 15, 1975, p. 2959-2962.

Astronomy and Astrophysics

Astronomy

66

Black Holes (Astronomy), Magnetic Fields, Magnetohydrodynamic Flow, Relativistic Effects, Angular Momentum, Earth Magnetosphere, Electric Charge, Lines Of Force, Plasma Dynamics

Scientific paper

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.

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