title: Modeling the Complete Gravitational Wave Spectrum of Neutron Star Mergers.
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 f(2) is correlated with the tidal coupling constant κ(2)^T that characterizes the binary tidal interactions during the late-inspiral merger. The relation f(2)(κ(2)^T) 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.
authors.affiliation: TAPIR, California Institute of Technology, 1200 East California Boulevard, Pasadena, California 91125, USA.|DiFeST, University of Parma and INFN Parma, I-43124 Parma, Italy.
authors.forename: Sebastiano
authors.initials: S
authors.lastname: Bernuzzi
authors.affiliation: Theoretical Physics Institute, University of Jena, 07743 Jena, Germany.
authors.forename: Tim
authors.initials: T
authors.lastname: Dietrich
authors.affiliation: Institut des Hautes Etudes Scientifiques, 91440 Bures-sur-Yvette, France.
authors.forename: Alessandro
authors.initials: A
authors.lastname: Nagar