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Electromagnetic fields on Kerr spacetime, Hertz potentials and Lorenz gauge

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arxiv 1906.04808 v3 pith:KVGNEG6W submitted 2019-06-11 gr-qc hep-thmath-phmath.MP

classification gr-qchep-thmath-phmath.MP
keywords gaugeelectromagnetichertzkerrlorenzmethodpotentialpotentials
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abstract

We review two procedures for constructing the vector potential of the electromagnetic field on Kerr spacetime, namely, the classic method of Cohen & Kegeles, yielding $A^\mu$ in a radiation gauge, and the newer method of Frolov et al., yielding $A^\mu$ in Lorenz gauge. We demonstrate that the vector potentials are related by straightforward gauge transformations, which we give in closed form. We obtain a new result for a separable Hertz potential $H^{\mu \nu}$ such that $A_{\text{lor}}^\mu = \nabla_\nu H^{\mu \nu}$.

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Cited by 3 Pith papers

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

  1. Kerr black holes with vector dark matter hair

    gr-qc 2026-07 conditional novelty 6.0 of 10

    Massive vector dark matter forms a r^{-3/2} density spike around a Kerr black hole and, for co-rotating low-frequency modes, extracts mass and angular momentum through superradiant scattering.

  2. Black-hole hair from vector dark matter accretion

    gr-qc 2025-06 conditional novelty 6.0 of 10

    A Schwarzschild black hole accreting from a bath of vector dark matter develops a nontrivial Proca field profile, with density amplified by up to 10^7 near the horizon and mass accretion rates reaching tens of solar m...

  3. On symmetry operators for the Maxwell equation on the Kerr-NUT-(A)dS spacetime

    gr-qc 2019-08 accept novelty 5.0 of 10

    Using the Eisenhart-Duval lift, the authors reproduce previously known commuting symmetry operators for the Maxwell (LFKK) equation on Kerr-NUT-(A)dS spacetimes in covariant form, and construct the analogous operator ...

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