English

Post-adiabatic waveform-generation framework for asymmetric precessing binaries

General Relativity and Quantum Cosmology 2025-12-01 v3 Instrumentation and Methods for Astrophysics

Abstract

Recent years have seen rapid progress in calculations of gravitational waveforms from asymmetric compact binaries containing spinning secondaries. Here we outline a complete waveform-generation scheme, through first post-adiabatic order (1PA) in gravitational self-force theory, for generic secondary spin and generic (eccentric, precessing) orbital configurations around a generic Kerr primary. We emphasize the utility of a Fermi-Walker frame in parametrizing the secondary spin, and we analyse precession and nutation effects in the spin-orbit dynamics. We also explain convenient gauge choices within the waveform-generation scheme, and the gauge invariance of the resulting waveform. Finally, we highlight that, thanks to recent results due to Grant and Witzany et al., all relevant spin effects at 1PA order can now be computed without evaluating local self-forces or torques.

Keywords

Cite

@article{arxiv.2501.01413,
  title  = {Post-adiabatic waveform-generation framework for asymmetric precessing binaries},
  author = {Josh Mathews and Adam Pound},
  journal= {arXiv preprint arXiv:2501.01413},
  year   = {2025}
}

Comments

39 pages, 0 figures. Minor updates reflecting version published in PRD

R2 v1 2026-06-28T20:54:50.703Z