Stochastic Backgrounds of Gravitational Waves from Cosmological Populations of Astrophysical Sources

TL;DR

This paper investigates the stochastic gravitational wave background generated by astrophysical sources like black hole formations and neutron star spin-downs, assessing their detectability based on cosmic source rates and emission models.

Contribution

It provides a comprehensive analysis of the gravitational wave background from various astrophysical sources considering realistic formation rates and emission mechanisms.

Findings

Estimated the gravitational wave background from black hole formation and neutron star spin-down.

Explored parameter space to assess the potential detectability of the background signals.

Discussed the implications for future gravitational wave detectors.

Abstract

Astrophysical sources of gravitational radiation are likely to have been formed since the beginning of star formation. Realistic source rates of formation throughout the Universe have been estimated from an observation-based determination of the star formation rate density evolution. Both the radiation emitted during the collapse to black holes and the spin-down radiation, induced by the r-mode instability, emitted by hot, young rapidly rotating neutron stars have been considered. We have investigated the overall signal produced by the ensemble of sources exploring the parameter space and discussing its possible detectability.