Black hole in a magnetic universe

Details Black hole in a magnetic universe Black hole in a magnetic universe

Jun 1987

adsabs.harvard.edu/cgi-bin/nph-data_query?bibcode=1987zhetf..92.1921d&link_type=abstract

Zhurnal Eksperimental'noi i Teoreticheskoi Fiziki (ISSN 0044-4510), vol. 92, June 1987, p. 1921-1935. In Russian.

Astronomy and Astrophysics

Astronomy

5

Black Holes (Astronomy), Interstellar Magnetic Fields, Stellar Physics, Einstein Equations, Electric Charge, Magnetic Flux, Maxwell Equation, Potential Theory, Stellar Rotation

Scientific paper

The general properties of a rotating electrically charged black hole (BH) in an external magnetic field are examined using the Ernst-Wild (1976) metric. The electromagnetic potential corresponding to a uniform magnetic field which is parallel to the axis of rotation of a charged BH is found. It is shown that, in the presence of an external magnetic field, the rapidly rotating BH can have specific angular momentum and electric discharge values exceeding those of a Kerr-Newman BH. This superextreme BH possesses a horizon of events and does not convert into a naked singularity. The parameters of an electrically equilibrium black hole in a uniform magnetic field are determined. Consideration is also given to the transformation which the parameters of the superextreme BH undergo when the uniform magnetic field is turned off.

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