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

Abstract:
We present exact solutions of test particle orbits spiraling 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 four-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.
Publication status:
Published
Peer review status:
Peer reviewed

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Publisher copy:
10.1103/physrevlett.129.161101

Authors


More by this author
Institution:
University of Oxford
Division:
MPLS
Department:
Physics
Role:
Author
More by this author
Institution:
University of Oxford
Division:
MPLS
Department:
Physics
Sub department:
Astrophysics
Oxford college:
New College;New College;New College;New College;New College;New College;New College;New College;New College
Role:
Author
ORCID:
0000-0002-0934-1501


Publisher:
American Physical Society
Journal:
Physical Review Letters More from this journal
Volume:
129
Issue:
16
Article number:
161101
Publication date:
2022-10-12
Acceptance date:
2022-09-01
DOI:
EISSN:
1079-7114
ISSN:
0031-9007
Pmid:
36306763


Language:
English
Keywords:
Pubs id:
1287982
Local pid:
pubs:1287982
Deposit date:
2022-11-07

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