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arxiv: 1602.00599 · v3 · submitted 2016-02-01 · 🌀 gr-qc · astro-ph.HE· astro-ph.SR

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Effects of neutron-star dynamic tides on gravitational waveforms within the effective-one-body approach

Tanja Hinderer , Andrea Taracchini , Francois Foucart , Alessandra Buonanno , Jan Steinhoff , Matthew Duez , Lawrence E. Kidder , Harald P. Pfeiffer
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Mark A. Scheel Bela Szilagyi Kenta Hotokezaka Koutarou Kyutoku Masaru Shibata Cory W. Carpenter
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classification 🌀 gr-qc astro-ph.HEastro-ph.SR
keywords binariesdynamicneutron-startideseffective-one-bodyeffectsgravitationalmatter
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Extracting the unique information on ultradense nuclear matter from the gravitational waves emitted by merging, neutron-star binaries requires robust theoretical models of the signal. We develop a novel effective-one-body waveform model that includes, for the first time, dynamic (instead of only adiabatic) tides of the neutron star, as well as the merger signal for neutron-star--black-hole binaries. We demonstrate the importance of the dynamic tides by comparing our model against new numerical-relativity simulations of nonspinning neutron-star--black-hole binaries spanning more than 24 gravitational-wave cycles, and to other existing numerical simulations for double neutron-star systems. Furthermore, we derive an effective description that makes explicit the dependence of matter effects on two key parameters: tidal deformability and fundamental oscillation frequency.

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