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GR: Fachverband Gravitation und Relativitätstheorie

GR 9: Gravitational Waves

GR 9.4: Vortrag

Mittwoch, 23. März 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.