Modeling the Complete Gravitational Wave Spectrum of Neutron Star Mergers

Sebastiano Bernuzzi, Tim Dietrich, and Alessandro Nagar
Phys. Rev. Lett. 115, 091101 – Published 27 August 2015

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 f2 related to the particular structure and dynamics of the remnant hot hypermassive neutron star. We show that f2 is correlated with the tidal coupling constant κ2T that characterizes the binary tidal interactions during the late-inspiral merger. The relation f2(κ2T) 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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  • Received 9 April 2015

DOI:https://doi.org/10.1103/PhysRevLett.115.091101

© 2015 American Physical Society

Authors & Affiliations

Sebastiano Bernuzzi1,2, Tim Dietrich3, and Alessandro Nagar4

  • 1TAPIR, California Institute of Technology, 1200 East California Boulevard, Pasadena, California 91125, USA
  • 2DiFeST, University of Parma and INFN Parma, I-43124 Parma, Italy
  • 3Theoretical Physics Institute, University of Jena, 07743 Jena, Germany
  • 4Institut des Hautes Etudes Scientifiques, 91440 Bures-sur-Yvette, France

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Vol. 115, Iss. 9 — 28 August 2015

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