Black hole collisions, instabilities, and cosmic censorship violation at large D
Abstract We study the evolution of black hole collisions and ultraspinning black hole instabilities in higher dimensions. These processes can be efficiently solved numerically in an effective theory in the limit of large number of dimensions D. We present evidence that they lead to violations of cos...
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doaj-2cedc733c9d44d329d0971f45f8b91882020-11-25T03:25:30ZengSpringerOpenJournal of High Energy Physics1029-84792019-09-012019914110.1007/JHEP09(2019)099Black hole collisions, instabilities, and cosmic censorship violation at large DTomás Andrade0Roberto Emparan1David Licht2Raimon Luna3Departament de F ısica Quàntica i Astrof´ısica, Institut de Ciències del Cosmos, Universitat de BarcelonaDepartament de F ısica Quàntica i Astrof´ısica, Institut de Ciències del Cosmos, Universitat de BarcelonaDepartament de F ısica Quàntica i Astrof´ısica, Institut de Ciències del Cosmos, Universitat de BarcelonaDepartament de F ısica Quàntica i Astrof´ısica, Institut de Ciències del Cosmos, Universitat de BarcelonaAbstract We study the evolution of black hole collisions and ultraspinning black hole instabilities in higher dimensions. These processes can be efficiently solved numerically in an effective theory in the limit of large number of dimensions D. We present evidence that they lead to violations of cosmic censorship. The post-merger evolution of the collision of two black holes with total angular momentum above a certain value is governed by the properties of a resonance-like intermediate state: a long-lived, rotating black bar, which pinches off towards a naked singularity due to an instability akin to that of black strings. We compute the radiative loss of spin for a rotating bar using the quadrupole formula at finite D, and argue that at large enough D — very likely for D ≳ 8, but possibly down to D = 6 — the spin-down is too inefficient to quench this instability. We also study the instabilities of ultraspinning black holes by solving numerically the time evolution of axisymmetric and non-axisymmetric perturbations. We demonstrate the development of transient black rings in the former case, and of multi-pronged horizons in the latter, which then proceed to pinch and, arguably, fragment into smaller black holes.http://link.springer.com/article/10.1007/JHEP09(2019)099Black HolesSpacetime Singularities |
collection |
DOAJ |
language |
English |
format |
Article |
sources |
DOAJ |
author |
Tomás Andrade Roberto Emparan David Licht Raimon Luna |
spellingShingle |
Tomás Andrade Roberto Emparan David Licht Raimon Luna Black hole collisions, instabilities, and cosmic censorship violation at large D Journal of High Energy Physics Black Holes Spacetime Singularities |
author_facet |
Tomás Andrade Roberto Emparan David Licht Raimon Luna |
author_sort |
Tomás Andrade |
title |
Black hole collisions, instabilities, and cosmic censorship violation at large D |
title_short |
Black hole collisions, instabilities, and cosmic censorship violation at large D |
title_full |
Black hole collisions, instabilities, and cosmic censorship violation at large D |
title_fullStr |
Black hole collisions, instabilities, and cosmic censorship violation at large D |
title_full_unstemmed |
Black hole collisions, instabilities, and cosmic censorship violation at large D |
title_sort |
black hole collisions, instabilities, and cosmic censorship violation at large d |
publisher |
SpringerOpen |
series |
Journal of High Energy Physics |
issn |
1029-8479 |
publishDate |
2019-09-01 |
description |
Abstract We study the evolution of black hole collisions and ultraspinning black hole instabilities in higher dimensions. These processes can be efficiently solved numerically in an effective theory in the limit of large number of dimensions D. We present evidence that they lead to violations of cosmic censorship. The post-merger evolution of the collision of two black holes with total angular momentum above a certain value is governed by the properties of a resonance-like intermediate state: a long-lived, rotating black bar, which pinches off towards a naked singularity due to an instability akin to that of black strings. We compute the radiative loss of spin for a rotating bar using the quadrupole formula at finite D, and argue that at large enough D — very likely for D ≳ 8, but possibly down to D = 6 — the spin-down is too inefficient to quench this instability. We also study the instabilities of ultraspinning black holes by solving numerically the time evolution of axisymmetric and non-axisymmetric perturbations. We demonstrate the development of transient black rings in the former case, and of multi-pronged horizons in the latter, which then proceed to pinch and, arguably, fragment into smaller black holes. |
topic |
Black Holes Spacetime Singularities |
url |
http://link.springer.com/article/10.1007/JHEP09(2019)099 |
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