Effect of metallicity on the gravitational-wave signal from the cosmological population of compact binary coalescences
Résumé
Recent studies on stellar evolution have shown that the properties of compact objects strongly depend on metallicity of the environment in which they were formed. In this work, we study how the metallicity of the stellar population can affect unresolved gravitational waves background from extragalactic compact binaries. We obtain a suit of models using population synthesis code, estimate the gravitational wave background they produce and discuss its detectability with second (Advanced LIGO, Advanced Virgo) and third (Einstein Telescope) generation detectors. Our results show that the background is dominated by binary black holes for all considered models in the frequency range of terrestrial detectors, and that it could be detected in most cases by Advanced LIGO/Virgo, and with Einstein Telescope with a very high signal to noise ratio.