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Extremal Kerr-Newman black holes with extremely short charged scalar hair

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arxiv 1707.06246 v1 pith:TFTZCLDE submitted 2017-07-19 gr-qc astro-ph.HEhep-th

Extremal Kerr-Newman black holes with extremely short charged scalar hair

classification gr-qc astro-ph.HEhep-th
keywords hairblackblack-holechargedconfigurationsholeskerr-newmannull
verification ladder T0 review T1 audit T2 compute T3 formal T4 reserved
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The recently proved `no short hair' theorem asserts that, if a spherically-symmetric static black hole has hair, then this hair (the external fields) must extend beyond the null circular geodesic (the "photonsphere") of the corresponding black-hole spacetime: $r_{\text{field}}>r_{\text{null}}$. In this paper we provide compelling evidence that the bound can be {\it violated} by {\it non}-spherically symmetric hairy black-hole configurations. To that end, we analytically explore the physical properties of cloudy Kerr-Newman black-hole spacetimes -- charged rotating black holes which support linearized stationary charged scalar configurations in their exterior regions.

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Cited by 2 Pith papers

Reviewed papers in the Pith corpus that reference this work. Sorted by Pith novelty score.

  1. Distorting Kerr Images with Parity-Odd Scalar Hair

    gr-qc 2026-05 unverdicted novelty 5.0

    Numerical study of thin accretion disk images shows that increasing parity-odd scalar hair on Kerr black holes shrinks and distorts the photon ring and shadow, producing multiple disconnected shadows and chaotic lensi...

  2. Stationary scalar clouds around a rotating Kalb-Ramond BTZ black hole

    gr-qc 2026-06 unverdicted novelty 4.0

    Stationary scalar clouds exist around rotating KR BTZ black holes at superradiant threshold ω=mΩ_H, with positive KR parameter allowing nonmonotonic existence lines under Robin boundaries.