0597856 - ASÚ 2025 RIV US eng J - Journal Article
Albertini, Angelica - Nagar, A. - Mathews, J. - Lukes-Gerakopoulos, Georgios
Comparing second-order gravitational self-force and effective-one-body waveforms from inspiralling, quasicircular black hole binaries with a nonspinning primary and a spinning secondary.
Physical Review D. Roč. 110, č. 4 (2024), č. článku 044034. ISSN 2470-0010. E-ISSN 2470-0029
Grant - others:AV ČR(CZ) LQ100032102
Program: Prémie Lumina quaeruntur
Institutional support: RVO:67985815
Keywords : waveforms * orbital dynamics * black holes binaries
OECD category: Astronomy (including astrophysics,space science)
Impact factor: 4.6, year: 2023 ; AIS: 1.057, rok: 2023
Method of publishing: Limited access
Result website:
https://doi.org/10.1103/PhysRevD.110.044034DOI: https://doi.org/10.1103/PhysRevD.110.044034

We present the first comparison of waveforms evaluated using the effective-one-body (EOB) approach and gravitational self-force (GSF) theory for inspiralling black hole binaries with a nonspinning primary and a spinning secondary. This paper belongs to a series of papers comparing the EOB model TEOBResumS esum S to GSF results, where the latter are used to benchmark the EOB analytical choices in the large-mass-ratio regime. In this work, we explore the performance of two gauge choices for the gyro-gravitomagnetic functions G(S), G(S) entering the spin-orbit sector within the EOB dynamics. In particular, we consider the usual gauge of TEOBResumS, esum S, where G(S) and G(S) only depend on the inverse radius and the radial momentum, and a different gauge where these functions also depend on the azimuthal momentum. The latter choice allows us to exploit as prefactor in G(S), the complete expression G(S*)(K) for a spinning particle on Kerr. As done previously, we employ both waveform alignments in the time domain and a gauge-invariant frequency- domain analysis to gain a more complete understanding of the impact of the new analytical choice. The frequency-domain analysis is particularly useful in confirming that the gyro-gravitomagnetic functions in the new chosen gauge bring the EOB spin contribution at first postadiabatic order closer to the GSF one. We finally implement the improved functions within the public code for TEOBResum S-Dali, which already incorporates eccentricity. In this way, we upgrade the EOB model for extreme-mass-ratio inspirals presented in our previous work.
Permanent Link: https://hdl.handle.net/11104/0355693