MG14 - Talk detail |
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Participant |
Colleoni, Marta | |||||||
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Institution |
University of Southampton - Salisbury Road - Southampton - Hampshire - United Kingdom | |||||||
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Session |
BN5 |
Accepted |
No |
Order |
Time |
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Talk |
Oral abstract |
Title |
Overspinning a Kerr black hole: the effect of self-force | |||||
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Abstract |
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Pdf file |
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Session |
BN5 |
Accepted |
Yes |
Order |
8 |
Time |
17:15 | 15' |
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Talk |
Oral abstract |
Title |
Overspinning a Kerr black hole: the effect of self-force | |||||
| Coauthors | Barack, Leor | |||||||
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Abstract |
We study the scenario in which a massive particle is thrown into a rapidly rotating Kerr black hole in an attempt to spin it up beyond its extremal limit (``overspin''), challenging weak cosmic censorship. Previous works showed that, in the test-particle approximation, it is possible to find such overspinning orbits. We examine how the inclusion of back-reaction affects this scenario. We work at first order in black-hole perturbation theory, and focus on non-spinning, uncharged particles sent in on equatorial orbits. We find that the first order gravitational self-force acts in favour of cosmic censorship: the black hole cannot be driven beyond extremality, but only saturated at most. Saturation can be achieved only within a subclass of critical orbits. In this specific case, the second order self-force appears to be required in order to obtain a conclusive answer to the problem. |
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Pdf file |
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