Near-horizon Kerr magnetosphere

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Near-horizon Kerr magnetosphere

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Title: Near-horizon Kerr magnetosphere
Author: Gralla, Samuel E.; Lupsasca, Alexandru Victor; Strominger, Andrew E.

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Citation: Gralla, Samuel E., Alexandru Lupsasca, and Andrew Strominger. 2016. “Near-Horizon Kerr Magnetosphere.” Phys. Rev. D 93 (10) (May 23). doi:10.1103/physrevd.93.104041.
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Abstract: 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 the magnetosphere in the near-horizon region. The symmetry is shown to imply that the black hole Meissner effect holds for free Maxwell fields but is generically violated for force-free fields. We further show that in the extremal limit, near-horizon plasma particles are infinitely boosted relative to accretion flow. Active galactic nuclei powered by rapidly spinning black holes are therefore natural sites for high-energy particle collisions.
Published Version: doi:10.1103/PhysRevD.93.104041
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