Stochastic background from extra-galactic double neutron stars

TL;DR

This paper uses Monte Carlo simulations to estimate the gravitational wave background from extragalactic double neutron stars, showing that sources beyond redshift 0.5 create a detectable continuous background for future interferometers.

Contribution

It provides the first detailed simulation-based estimate of the extragalactic double neutron star gravitational wave background relevant for third-generation detectors.

Findings

Sources at z>0.5 produce a continuous background.

The background may be detectable by future third-generation interferometers.

Most of the gravitational wave signal is emitted in the last thousand seconds before merger.

Abstract

We present Monte Carlo simulations of the extra galactic population of inspiralling double neutron stars, and estimate its contribution to the astrophysical gravitational wave background, in the frequency range of ground based interferometers, corresponding to the last thousand seconds before the last stable orbit when more than 96 percent of the signal is released. We show that sources at redshift z>0.5 contribute to a truly continuous background which may be detected by correlating third generation interferometers.