The use of effective-one-body (EOB) waveforms for black hole binaries analysis in gravitational-wave astronomy requires faithful models and fast generation times. A key aspect to achieve faithfulness is the inclusion of numerical-relativity (NR) informed next-to-quasicircular corrections(NQC), dependent on the radial momentum, to the waveform and radiation reaction. A robust method to speed up the waveform generation is the post-adiabatic iteration to approximate the solution of the EOB Hamiltonian equations. In this work, we assess the performances of a fast NQC prescription in combination to the post-adiabatic method for generating multipolar gravitational waves. The outlined approach allows a consistent treatment of NQC in both the waveform and the radiation-reaction, does not require iterative procedures to achieve high faithfulness, and can be efficiently employed for parameter estimation. Comparing to 611 NR simulations, for total mass 10M⊙≤M≤200M⊙ and using the Advanded LIGO noise, the model has EOB/NR unfaithfulness well below 0.01, with 78.5\% of the cases below 0.001. We apply the model to the parameter estimation of GW150914 exploring the impact of the new NQC and of the higher modes up to ℓ=m=8.
@article{arxiv.2104.07533,
title = {TEOBResumS: assessment of consistent next-to-quasicircular corrections and post-adiabatic approximation in multipolar binary black holes waveforms},
author = {Gunnar Riemenschneider and Piero Rettegno and Matteo Breschi and Angelica Albertini and Rossella Gamba and Sebastiano Bernuzzi and Alessandro Nagar},
journal= {arXiv preprint arXiv:2104.07533},
year = {2021}
}