High Neutron Star Birth Velocities and Gravitational Radiation during Supernova Explosions

TL;DR

This paper estimates gravitational wave emissions during supernova explosions, linking neutron star velocities to asymmetric core collapse, and predicts detection rates with advanced interferometers within 30 Mpc.

Contribution

It provides the first calculation of gravitational wave amplitudes from supernovae based on observed pulsar velocities and estimates detection rates for current detectors.

Findings

Expected detection rate of about 1 per year within 30 Mpc.

Gravitational wave amplitude around 1.0e-22 at 300-1000 Hz.

Neutron star velocities are consistent with asymmetric core collapse models.

Abstract

Assuming the observed pulsar velocities to originate during asymmetric collapse of stellar cores, we compute the amplitude of gravitational waves emitted during type II and Ib supernova explosions and their detection rate from within a distance of 30 Mpc. At the rms-level of advanced laser interferometers h ~ 1.0e-22 at frequencies 300-1000 Hz the expected rate is about 1 per year.