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arXiv · 1602.00599

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·Mark A. Scheel·Bela Szilagyi·Kenta Hotokezaka·Koutarou Kyutoku·Masaru Shibata·Cory W. Carpenter
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Abstract

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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Tanja Hinderer, Andrea Taracchini, Francois Foucart, Alessandra Buonanno, Jan Steinhoff, Matthew Duez, Lawrence E. Kidder, Harald P. Pfeiffer, Mark A. Scheel, Bela Szilagyi, Kenta Hotokezaka, Koutarou Kyutoku, Masaru Shibata, Cory W. Carpenter. 2016-05-09. Effects of neutron-star dynamic tides on gravitational waveforms within the effective-one-body approach. https://doi.org/10.1103/physrevlett.116.181101

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