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The physics of black hole binaries: geodesics, relaxation modes and energy extraction

Black holes are the simplest macroscopic objects, and provide unique tests of general relativity. They have been compared to the hydrogen atom in quantum mechanics. Here, we establish a few facts about the simplest systems bound by gravity: black hole binaries. We provide strong evidence for the exi...

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Autores principales: Bernard, Laura, Cardoso, Vitor, Ikeda, Taishi, Zilhão, Miguel
Lenguaje:eng
Publicado: 2019
Materias:
Acceso en línea:https://dx.doi.org/10.1103/PhysRevD.100.044002
http://cds.cern.ch/record/2678045
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author Bernard, Laura
Cardoso, Vitor
Ikeda, Taishi
Zilhão, Miguel
author_facet Bernard, Laura
Cardoso, Vitor
Ikeda, Taishi
Zilhão, Miguel
author_sort Bernard, Laura
collection CERN
description Black holes are the simplest macroscopic objects, and provide unique tests of general relativity. They have been compared to the hydrogen atom in quantum mechanics. Here, we establish a few facts about the simplest systems bound by gravity: black hole binaries. We provide strong evidence for the existence of “global” photosurfaces surrounding the binary, and of binary quasinormal modes leading to the exponential decay of massless fields when the binary spacetime is slightly perturbed. These two properties go hand in hand, as they do for isolated black holes. The binary quasinormal modes have a high quality factor and may be prone to resonant excitations. Finally, we show that energy extraction from binaries is generic and we find evidence of a new mechanism—akin to the Fermi acceleration process—whereby the binary transfers energy to its surroundings in a cascading process. The mechanism is conjectured to work when the individual components spin, or are made of compact stars.
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spelling cern-26780452023-10-04T08:53:57Zdoi:10.1103/PhysRevD.100.044002http://cds.cern.ch/record/2678045engBernard, LauraCardoso, VitorIkeda, TaishiZilhão, MiguelThe physics of black hole binaries: geodesics, relaxation modes and energy extractionastro-ph.HEAstrophysics and Astronomygr-qcGeneral Relativity and CosmologyBlack holes are the simplest macroscopic objects, and provide unique tests of general relativity. They have been compared to the hydrogen atom in quantum mechanics. Here, we establish a few facts about the simplest systems bound by gravity: black hole binaries. We provide strong evidence for the existence of “global” photosurfaces surrounding the binary, and of binary quasinormal modes leading to the exponential decay of massless fields when the binary spacetime is slightly perturbed. These two properties go hand in hand, as they do for isolated black holes. The binary quasinormal modes have a high quality factor and may be prone to resonant excitations. Finally, we show that energy extraction from binaries is generic and we find evidence of a new mechanism—akin to the Fermi acceleration process—whereby the binary transfers energy to its surroundings in a cascading process. The mechanism is conjectured to work when the individual components spin, or are made of compact stars.Black holes are the simplest macroscopic objects, and provide unique tests of General Relativity. They have been compared to the Hydrogen atom in quantum mechanics. Here, we establish a few facts about the simplest systems bound by gravity: black hole binaries. We provide strong evidence for the existence of `global' photosurfaces surrounding the binary, and of binary quasinormal modes leading to exponential decay of massless fields when the binary spacetime is slightly perturbed. These two properties go hand in hand, as they did for isolated black holes. The binary quasinormal modes have high quality factor and may be prone to resonant excitations. Finally, we show that energy extraction from binaries is generic and we find evidence of a new mechanism -- akin to the Fermi acceleration process -- whereby the binary transfers energy to its surroundings in a cascading process. The mechanism is conjectured to work when the individual components spin, or are made of compact stars.arXiv:1905.05204oai:cds.cern.ch:26780452019-05-13
spellingShingle astro-ph.HE
Astrophysics and Astronomy
gr-qc
General Relativity and Cosmology
Bernard, Laura
Cardoso, Vitor
Ikeda, Taishi
Zilhão, Miguel
The physics of black hole binaries: geodesics, relaxation modes and energy extraction
title The physics of black hole binaries: geodesics, relaxation modes and energy extraction
title_full The physics of black hole binaries: geodesics, relaxation modes and energy extraction
title_fullStr The physics of black hole binaries: geodesics, relaxation modes and energy extraction
title_full_unstemmed The physics of black hole binaries: geodesics, relaxation modes and energy extraction
title_short The physics of black hole binaries: geodesics, relaxation modes and energy extraction
title_sort physics of black hole binaries: geodesics, relaxation modes and energy extraction
topic astro-ph.HE
Astrophysics and Astronomy
gr-qc
General Relativity and Cosmology
url https://dx.doi.org/10.1103/PhysRevD.100.044002
http://cds.cern.ch/record/2678045
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