Gravitational tuning forks and hierarchical triple systems
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Gravitational tuning forks and hierarchical triple systems. / Cardoso, Vitor; Duque, Francisco; Khanna, Gaurav.
I: Physical Review D, Bind 103, Nr. 8, 081501, 22.04.2021.Publikation: Bidrag til tidsskrift › Tidsskriftartikel › Forskning › fagfællebedømt
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TY - JOUR
T1 - Gravitational tuning forks and hierarchical triple systems
AU - Cardoso, Vitor
AU - Duque, Francisco
AU - Khanna, Gaurav
PY - 2021/4/22
Y1 - 2021/4/22
N2 - We study gravitational wave (GW) emission in the strong-field regime by a hierarchical triple system composed of a binary system placed in the vicinity of a supermassive black hole (SMBH). The LIGO-Virgo Collaboration recently reported evidence for coalescences with this dynamical origin. These systems are common in galactic centers and thus, are a target for the space-based LISA mission as well as other advanced detectors. Doppler shifts, aberration, lensing, and strong amplitude modulations are features present in the GW signal from these systems, built into our framework and with no need for phenomenological patches. We find that the binary can resonantly excite the quasinormal modes of the SMBH, as in the resonant excitation of two tuning forks with matching frequencies. The flux of energy crossing the SMBH horizon can be significant, when compared with that from standard extreme-mass-ratio inspirals. Therefore, these triple systems are excellent probes of strong-field physics and of the BH nature of compact objects.
AB - We study gravitational wave (GW) emission in the strong-field regime by a hierarchical triple system composed of a binary system placed in the vicinity of a supermassive black hole (SMBH). The LIGO-Virgo Collaboration recently reported evidence for coalescences with this dynamical origin. These systems are common in galactic centers and thus, are a target for the space-based LISA mission as well as other advanced detectors. Doppler shifts, aberration, lensing, and strong amplitude modulations are features present in the GW signal from these systems, built into our framework and with no need for phenomenological patches. We find that the binary can resonantly excite the quasinormal modes of the SMBH, as in the resonant excitation of two tuning forks with matching frequencies. The flux of energy crossing the SMBH horizon can be significant, when compared with that from standard extreme-mass-ratio inspirals. Therefore, these triple systems are excellent probes of strong-field physics and of the BH nature of compact objects.
KW - BLACK-HOLE MERGERS
KW - MASS
KW - BINARIES
KW - PARTICLE
KW - PERTURBATIONS
KW - RADIATION
KW - LIGHT
KW - INSPIRALS
KW - EVOLUTION
KW - FIELD
U2 - 10.1103/PhysRevD.103.L081501
DO - 10.1103/PhysRevD.103.L081501
M3 - Journal article
VL - 103
JO - Physical Review D
JF - Physical Review D
SN - 2470-0010
IS - 8
M1 - 081501
ER -
ID: 298633067