0619115 - ASÚ 2026 RIV US eng J - Článek v odborném periodiku
Albertini, Angelica - Skoupý, V. - Lukes-Gerakopoulos, Georgios - Nagar, A.
Comparing effective-one-body and Mathisson-Papapetrou-Dixon results for a spinning test particle on circular equatorial orbits around a Kerr black hole.
Physical Review D. Roč. 111, č. 6 (2025), č. článku 064086. ISSN 2470-0010. E-ISSN 2470-0029
Grant ostatní: AV ČR(CZ) LQ100032102
Program: Prémie Lumina quaeruntur
Institucionální podpora: RVO:67985815
Klíčová slova: general-relativity * extended bodies * dynamics * field
Obor OECD: Astronomy (including astrophysics,space science)
Impakt faktor: 4.6, rok: 2023 ; AIS: 1.057, rok: 2023
Způsob publikování: Omezený přístup
Web výsledku:
https://doi.org/10.1103/PhysRevD.111.064086DOI: https://doi.org/10.1103/PhysRevD.111.064086

We consider a spinning test particle around a rotating black hole and compare the MathissonPapapetrou-Dixon (MPD) formalism under the Tulczyjew-Dixon spin supplementary condition to the test-mass limit of the effective-one-body (EOB) Hamiltonian of [T. Damour and A. Nagar, New effective-one-body description of coalescing nonprecessing spinning black-hole binaries, Phys. Rev. D 90, 044018 (2014)] with enhanced spin-orbit sector. We focus on circular equatorial orbits: we first compare the constants of motion at their linear in secondary spin sigma approximation and then we compute the gravitational-wave (GW) fluxes using a frequency domain Teukolsky equation solver. We find no difference between the EOB and MPD fluxes when the background spacetime is Schwarzschild, while the difference for a Kerr background is maximum for large, positive spins. Our work could be considered as a first step to improve the radiation reaction of the EOB model, in view of the needs of the next-generation of GW detectors.
Trvalý link: https://hdl.handle.net/11104/0365899