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Inspirals from the innermost stable circular orbit of Kerr black holes: Exact solutions and universal radial flow

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arxiv 2209.03579 v1 pith:DA25AIXJ submitted 2022-09-08 gr-qc astro-ph.HE

Andrew Mummery , Steven Balbus This is my paper · ORCID
classification gr-qcastro-ph.HE
keywords blackkerrradialsolutionscircularexactholeinnermost
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abstract

We present exact solutions of test particle orbits spiralling inward from the innermost stable circular orbit (ISCO) of a Kerr black hole. Our results are valid for any allowed value of the angular momentum $a$-parameter of the Kerr metric. These solutions are of considerable physical interest. In particular, the radial 4-velocity of these orbits is both remarkably simple and, with the radial coordinate scaled by its ISCO value, universal in form, otherwise completely independent of the black hole spin.

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Cited by 3 Pith papers

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    A phase-space self-force framework is extended through the final plunge to produce merger-ringdown waveforms at leading geodesic order, with stationary-phase and quasinormal-mode approximations both failing near the p...

  3. Black hole supercolliders

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    Retrograde plunging accretion flows around near-extremal Kerr black holes can collide with free-falling particles at TeV-scale center-of-mass energies.

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