2023/03/31 by Lorenzo Pompili, Pompili, Lorenzo, Alessandra Buonanno +57 · 36 citations
Physics and Astronomy · #Pulsars and Gravitational Waves Research #Astrophysical Phenomena and Observations #Gamma-ray bursts and supernovae
paper · pdf · doi:10.1103/physrevd.108.124035
We present SEOBNRv5HM, a more accurate and faster inspiral-merger-ringdown gravitational waveform model for quasicircular, spinning, nonprecessing binary black holes within the effective-one-body (EOB) formalism. Compared to its predecessor, SEOBNRv4HM, the waveform model (i) incorporates recent high-order post-Newtonian results in the inspiral, with improved resummations, (ii) includes the gravitational modes (\ensuremathℓ,|m|)=(3,2),(4,3), in addition to the (2,2), (3,3), (2,1), (4,4), (5,5) modes already implemented in SEOBNRv4HM, (iii) is calibrated to larger mass ratios and spins using a catalog of 442 numerical-relativity (NR) simulations and 13 additional waveforms from black-hole perturbation theory, and (iv) incorporates information from second-order gravitational self-force in the nonspinning modes and radiation-reaction force. Computing the unfaithfulness against NR simulations, we find that for the dominant (2,2) mode the maximum unfaithfulness in the total mass range 10--300M_\ensuremath\bigodot is below 10^\ensuremath-3 for 90% of the cases (38% for SEOBNRv4HM). When including all modes up to \ensuremathℓ=5 we find 98% (49%) of the cases with unfaithfulness below 10^\ensuremath-2 (10^\ensuremath-3), while these numbers reduce to 88% (5%) when using SEOBNRv4HM. Furthermore, the model shows improved agreement with NR in other dynamical quantities (e.g., the angular momentum flux and binding energy), providing a powerful check of its physical robustness. We implemented the waveform model in a high-performance python package (pyseobnr), which leads to evaluation times faster than SEOBNRv4HM by a factor of 10 to 50, depending on the configuration, and provides the flexibility to easily include spin-precession and eccentric effects, thus making it the starting point for a new generation of EOBNR waveform models (SEOBNRv5) to be employed for upcoming observing runs of the LIGO-Virgo-KAGRA detectors.
SEBOB): combining Effective One-Body inspirals and Backwards One-Body merger-ringdowns for aligned spin black hole binaries