Near-horizon extreme Kerr magnetospheres

@article{Compre2016NearhorizonEK,
  title={Near-horizon extreme Kerr magnetospheres},
  author={G. Comp{\`e}re and R. Oliveri},
  journal={Physical Review D},
  year={2016},
  volume={93},
  pages={024035}
}
Analytical solutions to force-free electrodynamics around black holes are fundamental for building simple models of accretion disk and jet dynamics. We present a (nonexhaustive) classification of complex highest-weight solutions to the force-free equations in the near-horizon region of the extremal Kerr black hole. Several classes of real magnetically dominated or null solutions, either axisymmetric or nonaxisymmetric, are described which admit finite energy and angular momentum with respect to… Expand

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References

SHOWING 1-10 OF 36 REFERENCES
Near-horizon Kerr magnetosphere
We exploit the near-horizon conformal symmetry of rapidly spinning black holes to determine universal properties of their magnetospheres. Analytic expressions are derived for the limiting form of theExpand
Force-free electrodynamics around extreme Kerr black holes
A bstractPlasma-filled magnetospheres can extract energy from a spinning black hole and provide the power source for a variety of observed astrophysical phenomena. These magnetospheres are describedExpand
Jet formation in the magnetospheres of supermassive black holes: analytic solutions describing energy loss through Blandford–Znajek processes
In this paper, we provide exact solutions for the extraction of energy from a rotating black hole via both the electromagnetic Poynting flux and matter currents. By appropriate choice of a radiallyExpand
Electromagnetic Jets from Stars and Black Holes
We present analytic force-free solutions modeling rotating stars and black holes immersed in the magnetic field of a thin disk that terminates at an inner radius. The solutions are exact in flatExpand
Towards an understanding of the force-free magnetosphere of rapidly spinning black holes
The ability of a plasma surrounding spinning black holes to extract rotational energy and power energetic emissions has been recognized as a key astrophysical phenomenon. Important insights into theExpand
A class of exact solutions to the force-free, axisymetric, stationary magnetosphere of a Kerr black hole
We analyze the constraint equation giving allowed solutions describing fields and currents in a force-free magnetosphere around a rotating black hole. Utilizing the divergence properties of theExpand
Exact solutions for extreme black hole magnetospheres
A bstractWe present new exact solutions of Force-Free Electrodynamics (FFE) in the Near-Horizon region of an Extremal Kerr black hole (NHEK) and offer a complete classifica-tion of the subset thatExpand
Spacetime approach to force-free magnetospheres
Force-Free Electrodynamics (FFE) describes magnetically dominated relativistic plasma via non-linear equations for the electromagnetic field alone. Such plasma is thought to play a key role in theExpand
Exact solutions to force-free electrodynamics in black hole backgrounds
A shared property of several of the known exact solutions to the equations of force-free electrodynamics is that their charge-current four-vector is null. We examine the general properties ofExpand
A measurement of the electromagnetic luminosity of a kerr black hole
Some active galactic nuclei, microquasars, and gamma-ray bursts may be powered by the electromagnetic braking of a rapidly rotating black hole. We investigate this possibility via axisymmetricExpand
...
1
2
3
4
...