1205.4621 (I. Kowalska et al.)

Effect of metallicity on the gravitational-wave signal from the cosmological population of compact binary coalescences    [PDF]

I. Kowalska, T. Regimbau, T. Bulik, M. Dominik, K. Belczynski

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 of compact binaries using population synthesis code and estimate the gravitational wave background they produce. Our results show a double peaked structure for all considered models with the first peak between 30-100Hz caused by the binary black holes population and the second between 500-1000Hz corresponding to the double neutron stars population. We discuss the detectability of gravitational waves background with second (Advanced LIGO, Advanced Virgo) and third (Einstein Telescope) generation detectors.

View original: http://arxiv.org/abs/1205.4621