2015/04/30 by Sebastiano Bernuzzi, Tim Dietrich, Alessandro Nagar · 280 citations
Physics and Astronomy · #Astronomy #Astrophysics #Binary number #Classical mechanics #Computational physics #Context (archaeology) #Equation of state #Gamma-ray bursts and supernovae #General relativity #Gravitation #Gravitational wave #Magnetic confinement fusion research #Neutron star #Physics #Pulsars and Gravitational Waves Research #Quantum mechanics #Spectral line #astro-ph.HE #gr-qc
paper · pdf · doi:10.1103/physrevlett.115.091101
published in Physical Review Letters 115(9), 091101 (American Physical Society)
arxiv created 2015/08/17 · openalex publication_date 2015/08/27 · arxiv updated 2015/09/02 · openalex created_date 2025/10/10 · openalex updated_date 2026/08/06
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.