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Analytic Solution for the Motion of Spinning Particles in Kerr Space-Time

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arxiv 2411.16855 v2 pith:6BGYIC4E submitted 2024-11-25 gr-qc

classification gr-qc
keywords particleskerrmotionseparabilitysolutionspace-timeblackequations
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The equations of motion of massive test particles near Kerr black holes are separable in Boyer-Lindquist coordinates, as established by Carter. This separability, however, is lost when the particles are endowed with classical spin. We show that separability of the equations of motion can be recovered to linear order in spin by a shift of the worldline derived with the use of the hidden symmetry of Kerr space-time. Consequently, the closed-form solution of the motion is expressed in a way closely analogous to the solution for spinless particles. This finding enriches the understanding of separability and integrability properties of the dynamics of test particles and fields in Kerr space-time and is particularly valuable for modeling inspirals of rotating compact objects into massive black holes.

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Cited by 2 Pith papers

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

  1. Symplectic mechanics of relativistic spinning compact bodies. III. quadratic-in-spin integrability in Type-D Einstein spacetimes: persistence and breakdown

    gr-qc 2026-01 conditional novelty 7.0 of 10

    Quadratic-in-spin MPTD dynamics in type-D Einstein spacetimes with Killing–Yano symmetry admits five commuting first integrals—hence Liouville–Arnold integrability—only when the spin-induced quadrupole deformability p...

  2. Secondary spins of extreme mass ratio inspirals: A probe to the formation channels

    astro-ph.HE 2025-02 conditional novelty 7.0 of 10

    For eccentric and inclined extreme mass-ratio inspirals, the secondary black hole spin may be measurable to about 0.1 at SNR 20, and high spins would point to the Hills formation channel.

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