Gravitational Waves from Neutrino Asymmetries in Core-Collapse Supernovae

TL;DR

This paper presents a detailed analysis of gravitational waves generated by neutrino emission asymmetries in core-collapse supernovae, providing insights into explosion geometry and long-term evolution, with implications for future gravitational wave detection.

Contribution

It introduces a broadband spectrum of gravitational waves from 3D supernova simulations, linking neutrino asymmetries to gravitational wave signals and informing future detection efforts.

Findings

Neutrino asymmetries produce detectable gravitational wave signals.

Memory effects are observable for a wide range of progenitors.

Results guide future gravitational wave detection strategies.

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.