Predicting gravitational waves from jittering-jets-driven core collapse supernovae

TL;DR

This paper estimates gravitational wave frequencies from jittering jets in core collapse supernovae to be 5-30 Hz, suggesting potential detectability and the ability to distinguish explosion mechanisms.

Contribution

It introduces a crude frequency estimate for gravitational waves from jittering jets, highlighting their lower frequency range compared to previous models, and discusses detection prospects.

Findings

Estimated GW frequencies: 5-30 Hz.

Potential detectability of Galactic CCSNe.

Distinguishing explosion mechanisms via GW signals.

Abstract

I estimate the frequencies of gravitational waves from jittering jets that explode core collapse supernovae (CCSNe) to crudely be 5-30 Hz, and with strains that might allow detection of Galactic CCSNe. The jittering jets explosion mechanism (JJEM) asserts that most CCSNe are exploded by jittering jets that the newly born neutron star (NS) launches within few seconds. According to the JJEM, instabilities in the accreted gas lead to the formation of intermittent accretion disks that launch the jittering jets. Earlier studies that did not include jets calculated the gravitational frequencies that instabilities around the NS emit to have a peak in the crude frequency range of 100-2000 Hz. Based on a recent study, I take the source of the gravitational waves of jittering jets to be the turbulent bubbles (cocoons) that the jets inflate as they interact with the outer layers of the core of the star at thousands of kilometres from the NS. The lower frequencies and larger strain than those of gravitational waves from instabilities in CCSNe allow future, and maybe present, detectors to identify the gravitational wave signals of jittering jets. Detection of gravitational waves from local CCSNe might distinguish between the neutrino-driven explosion mechanism and the JJEM.