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Blandford-Znajek mechanism in the general stationary axially-symmetric black-hole spacetime
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Blandford-Znajek mechanism in the general stationary axially-symmetric black-hole spacetime
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We consider the Blandford-Znajek process of electromagnetic extraction of energy from a general axially symmetric asymptotically flat slowly rotating black hole. Using the general parametrization of the black-hole spacetime we construct formulas for the flux of the magnetic field and the rate of energy extraction, which are valid not only for the Kerr spacetime, but also for its arbitrary axially symmetric deformations. We show that in the dominant order these quantities depend only on a single deformation parameter, which relates the spin frequency of a black hole with its rotation parameter.
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Cited by 1 Pith paper
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Universality of the Blandford-Znajek emission in stationary and axisymmetric spacetimes
The Blandford-Znajek jet luminosity is universal (∝Ω_h²) at leading order across parametric black-hole spacetimes and spacetime-dependent at next order, breaking the low-spin degeneracy for rapidly rotating holes.
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