The Gravitational Wave Signal from Core-collapse Supernovae

By V. Morozova, David Radice, Adam Burrows, D. Vartanyan. Astrophysical Journal, 2018

151 citations recorded by the source corpus.

We study gravitational waves (GWs) from a set of 2D multigroup neutrino radiation hydrodynamic simulations of core-collapse supernovae (CCSNe). Our goal is to systematize the current knowledge about the post-bounce CCSN GW signal and recognize the templatable features that could be used by the ground-based laser interferometers. We demonstrate that, starting from ∼400 ms after core bounce, the dominant GW signal represents the fundamental quadrupole (l = 2) oscillation mode (f-mode) of the proto–neutron star (PNS), which can be accurately reproduced by a linear perturbation analysis of the angle-averaged PNS profile. Before that, in the time interval between ∼200 and ∼400 ms after bounce, the dominant mode has two radial nodes and represents a g-mode. We associate the high-frequency noise in the GW spectrograms above the main signal with p-modes, while below the dominant frequency there is a region with very little power. The collection of models presented here summarizes the dependence of the CCSN GW signal on the progenitor mass, equation of state, many-body corrections to the neutrino opacity, and rotation. Weak dependence of the dominant GW frequency on the progenitor mass motivates us to provide a simple fit for it as a function of time, which can be used as a prior when looking for CCSN candidates in the LIGO data.

Subfields: Astronomy and Astrophysics, Nuclear and High Energy Physics

View Paper: https://www.semanticscholar.org/paper/d5d037ed3adf9a14f11d6968607204654655a1f6

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Citations in the corpus

A successful 3D core-collapse supernova explosion model (2018, background): “…approximation in core-collapse simulations), Radice et al. 2017 (low-mass CCSNe), Burrows et al. 2018 (the role of microphysics in CCSNe), Morozova et al. 2018 (gravitational wave signatures of CCSNe), Vartanyan et al. 2018 (CCSNe from 12-25 M ), and Seadrow et al. 2018 (neutrino…”
Characterizing the Gravitational Wave Signal from Core-collapse Supernovae (2018, methodology): “Using the astroseismological approach that we developed in Morozova et al. (2018), we identify this feature with a low-order, quadrupolar surface g-mode of the PNS.”