Instruct: Identify the main and secondary category of Arxiv papers based on the titles and abstracts
Query: 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 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.

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The categories of this paper are: comp-gas
18
The categories of this paper are: econ
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The categories of this paper are: ao-sci
16
The categories of this paper are: stat
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The categories of this paper are: nucl-ex
3
The categories of this paper are: physics
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The categories of this paper are: q-fin
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The categories of this paper are: hep-ex
1
The categories of this paper are: cs
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The categories of this paper are: chem-ph
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The categories of this paper are: hep-lat
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The categories of this paper are: solv-int
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The categories of this paper are: nlin
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The categories of this paper are: q-bio
2
The categories of this paper are: math
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The categories of this paper are: adap-org