Gravitational Waves from Neutrino Asymmetries in Core-Collapse Supernovae

Abstract

We present a broadband spectrum of gravitational waves from core-collapse supernovae (CCSNe) sourced by neutrino emission asymmetries for a series of full 3D simulations. The associated gravitational wave strain probes the long-term secular evolution of CCSNe and small-scale turbulent activity and provides insight into the geometry of the explosion. For non-exploding models, both the neutrino luminosity and the neutrino gravitational waveform will encode information about the spiral SASI. The neutrino memory will be detectable for a wide range of progenitor masses for a galactic event.Our results can be used to guide near-future decihertz and long-baseline gravitational-wave detection programs, including aLIGO, the Einstein Telescope, and DECIGO.

The missing link in gravitational-wave astronomy: discoveries waiting in the decihertz range

“…The two polarizations are different at any given time due to the stochasticity of the angular distributions of the emitted neutrinos. In the dHz frequency range, anisotropic neutrino emission is more than one order of magnitude larger than GW signal emitted by anisotropic matter expulsion (e.g., [178,179]). At low frequencies, the metric strain due to anisotropic neutrino emissions dominates all other components, and also leaves a net metric displacement, similar to that associated with classical Christodoulou memory [180,181].…”