Heidelberg 2022 – scientific programme
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GR: Fachverband Gravitation und Relativitätstheorie
GR 9: Gravitational Waves
GR 9.4: Talk
Wednesday, March 23, 2022, 17:15–17:35, GR-H2
TEOBResumS for black-hole-neutron star merger waveforms — •Alejandra Gonzalez1, Rossella Gamba1, Matteo Breschi1, Francesco Zappa1, Sebastiano Bernuzzi1, and Alessandro Nagar2 — 1Theoretisch-Physikalisches Institut, Friedrich-Schiller-Universität Jena, 07743, Jena, Germany — 2INFN Sezione di Torino, Via P. Giuria 1, 10125 Torino, Italy
We present a new effective-one-body (EOB) model for black-hole-neutron-star merger waveforms based on a numerical-relativity (NR) informed model of the remnant BH state and a ringdown that deforms the EOB ringdown for binary black holes. The new model reproduces the (2,2) mode waveform of NR simulations with typical phase agreement within 0.5 rad to merger and within 1 rad including ringdown. Comparing to other available BHNS waveform models, the NR phasing is captured with a comparable accuracy. The model also includes higher modes (2,1), (2,2), (3,2), (3,3), (4,4) and (5,5). We present a full Bayesian analysis of the gravitational-wave events GW190814, GW200105, and GW200115, and find consistent results with previous studies.