New twists in compact binary waveform modeling: A fast time-domain model for precession
Abstract
We present IMRPHenomTPHM, a phenomenological model for the gravitational-wave signals emitted by the coalescence of quasicircular precessing binary black holes systems. The model is based on the "twisting up" approximation, which maps nonprecessing signals to precessing ones in terms of a time-dependent rotation which can be described by three Euler angles and which has been utilized in several frequency-domain waveform models that have become standard tools in gravitational-wave data analysis as well as in several time-domain models. Our model is constructed in the time domain, applying the twisting up approximation to the nonprecessing multimode model IMRPhenomTHM, which allows several improvements over the frequency-domain models; we do not use the stationary phase approximation, we employ a simple approximation for the precessing Euler angles for the ringdown signal, and we implement a new method for computing the Euler angles through the evolution of the spin dynamics of the system, which is more accurate and also computationally efficient.
- Publication:
-
Physical Review D
- Pub Date:
- April 2022
- DOI:
- 10.1103/PhysRevD.105.084040
- arXiv:
- arXiv:2105.05872
- Bibcode:
- 2022PhRvD.105h4040E
- Keywords:
-
- General Relativity and Quantum Cosmology
- E-Print:
- 18 pages, 10 figures, 4 tables