A Model of the Stochastic Gravitational-Wave Background due to Core Collapse to Black Holes

TL;DR

This paper models the stochastic gravitational-wave background from black hole ring-downs following stellar core collapse, analyzing its detectability with future gravitational-wave observatories.

Contribution

It introduces a comprehensive model incorporating recent astrophysical data on star formation and black hole populations to predict the gravitational-wave background.

Findings

The background could be detectable by Advanced LIGO and Einstein Telescope.

Black hole formation rate significantly influences the background amplitude.

The model constrains the contribution of core-collapse events to the gravitational-wave background.

Abstract

Superposition of gravitational waves generated by astrophysical sources is expected to give rise to the stochastic gravitational-wave background. We focus on the background generated by the ring-down of black holes produced in the stellar core collapse events across the universe. We systematically study the parameter space in this model, including the most recent information about the star formation rate and about the population of black holes as a function of redshift and of metallicity. We investigate the accessibility of this gravitational wave background to the upcoming gravitational-wave detectors, such as Advanced LIGO and Einstein Telescope.