Physics of black hole binaries: Geodesics, relaxation modes, and energy extraction
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Physics of black hole binaries : Geodesics, relaxation modes, and energy extraction. / Bernard, Laura; Cardoso, Vitor; Ikeda, Taishi; Zilhao, Miguel.
I: Physical Review D, Bind 100, Nr. 4, 044002, 01.08.2019.Publikation: Bidrag til tidsskrift › Tidsskriftartikel › Forskning › fagfællebedømt
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TY - JOUR
T1 - Physics of black hole binaries
T2 - Geodesics, relaxation modes, and energy extraction
AU - Bernard, Laura
AU - Cardoso, Vitor
AU - Ikeda, Taishi
AU - Zilhao, Miguel
PY - 2019/8/1
Y1 - 2019/8/1
N2 - 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.
AB - 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.
KW - ELECTROMAGNETIC-FIELDS
KW - GENERAL-RELATIVITY
KW - 2-CENTER PROBLEM
KW - SCATTERING
KW - RADIATION
KW - EQUATIONS
KW - WAVES
U2 - 10.1103/PhysRevD.100.044002
DO - 10.1103/PhysRevD.100.044002
M3 - Journal article
VL - 100
JO - Physical Review D
JF - Physical Review D
SN - 2470-0010
IS - 4
M1 - 044002
ER -
ID: 298639935