Interaction of a rotating charged black-hole with a uniform magnetic field

Details Interaction of a rotating charged black-hole with a uniform magnetic field Interaction of a rotating charged black-hole with a uniform magnetic field

Jul 1983

adsabs.harvard.edu/cgi-bin/nph-data_query?bibcode=1983a%26a...123..355d&link_type=abstract

Astronomy and Astrophysics (ISSN 0004-6361), vol. 123, no. 2, July 1983, p. 355-357.

Astronomy and Astrophysics

Astronomy

Black Holes (Astronomy), Interstellar Magnetic Fields, Rotating Matter, Luminosity, Maxwell Equation, Radiation Pressure, Relativity

Scientific paper

The interaction of a magnetic field with a charged black hole is examined using an approach similar to that of Pollock (1976). By analyzing the Maxwell equations in an approximated Kerr-Newman metric, it is shown that the parameters relevant in the study of the electrodynamics of the system are the induced magnetic moment and the intrinsic magnetic moment of the Kerr-Newman solution. The two moments are compared for the case of a 10 solar mass black hole immersed in a magnetic field of 10 to the -5th G. The charge on the hole is equal to that produced by radiation pressure in a spherical accreting system. Independently of the angular momentum, the intrinsic magnetic moment dominates the induced one for luminosities greater than about 10 to the 34th erg/s.

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