Article Dans Une Revue Physical Review Letters Année : 2019

First-Principles Plasma Simulations of Black-Hole Jet Launching

Résumé

Black holes drive powerful plasma jets to relativistic velocities. This plasma should be collisionless, and self-consistently supplied by pair creation near the horizon. We present general-relativistic collisionless plasma simulations of Kerr-black-hole magnetospheres which begin from vacuum, inject e± pairs based on local unscreened electric fields, and reach steady states with electromagnetically powered Blandford-Znajek jets and persistent current sheets. Particles with negative energy at infinity are a general feature, and can contribute significantly to black-hole rotational-energy extraction in a variant of the Penrose process. The generated plasma distribution depends on the pair-creation environment, and we describe two distinct realizations of the force-free electrodynamic solution. This sensitivity suggests that plasma kinetics will be useful in interpreting future horizon-resolving submillimeter and infrared observations.

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hal-01909222 , version 1 (31-08-2022)

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Kyle Parfrey, Alexander Philippov, Benoît Cerutti. First-Principles Plasma Simulations of Black-Hole Jet Launching. Physical Review Letters, 2019, 122 (3), pp.035101. ⟨10.1103/PhysRevLett.122.035101⟩. ⟨hal-01909222⟩
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