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arXiv · 1504.01764

Modeling the complete gravitational wave spectrum of neutron star mergers

Sebastiano Bernuzzi·Tim Dietrich·Alessandro Nagar
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Abstract

In the context of neutron star mergers, we study the gravitational wave spectrum of the merger remnant using numerical relativity simulations. Postmerger spectra are characterized by a main peak frequency $f_2$ related to the particular structure and dynamics of the remnant hot hypermassive neutron star. We show that $f_2$ is correlated with the tidal coupling constant $\kappa^T_2$ that characterizes the binary tidal interactions during the late-inspiral--merger. The relation $f_2(\kappa^T_2)$ depends very weakly on the binary total mass, mass-ratio, equation of state, and thermal effects. This observation opens up the possibility of developing a model of the gravitational spectrum of every merger unifying the late-inspiral and postmerger descriptions.

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Sebastiano Bernuzzi, Tim Dietrich, Alessandro Nagar. 2015-04-07. Modeling the complete gravitational wave spectrum of neutron star mergers. https://doi.org/10.1103/physrevlett.115.091101

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