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.
@article{arxiv.1602.00599,
title = {Effects of neutron-star dynamic tides on gravitational waveforms within the effective-one-body approach},
author = {Tanja Hinderer and Andrea Taracchini and Francois Foucart and Alessandra Buonanno and Jan Steinhoff and Matthew Duez and Lawrence E. Kidder and Harald P. Pfeiffer and Mark A. Scheel and Bela Szilagyi and Kenta Hotokezaka and Koutarou Kyutoku and Masaru Shibata and Cory W. Carpenter},
journal= {arXiv preprint arXiv:1602.00599},
year = {2016}
}