TEOBResumS: assessment of consistent next-to-quasicircular corrections and post-adiabatic approximation in multipolar binary black holes waveforms

Gunnar Riemenschneider; Piero Rettegno; Matteo Breschi; Angelica Albertini; Rossella Gamba; Sebastiano Bernuzzi; Alessandro Nagar

arXiv · 2104.07533

TEOBResumS: assessment of consistent next-to-quasicircular corrections and post-adiabatic approximation in multipolar binary black holes waveforms

Gunnar Riemenschneider·Piero Rettegno·Matteo Breschi·Angelica Albertini·Rossella Gamba·Sebastiano Bernuzzi·Alessandro Nagar

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Abstract

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 $10M_\odot\leq M \leq 200M_\odot$ 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 $\ell=m=8$.

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Gunnar Riemenschneider, Piero Rettegno, Matteo Breschi, Angelica Albertini, Rossella Gamba, Sebastiano Bernuzzi, Alessandro Nagar. 2021-04-15. TEOBResumS: assessment of consistent next-to-quasicircular corrections and post-adiabatic approximation in multipolar binary black holes waveforms. https://arxiv.org/abs/2104.07533

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