Cosmology with Binary Neutron Stars: Does Mass-Redshift Correlation Matter?

Understand

Next-generation gravitational wave detectors are expected to detect millions of compact binary mergers across cosmological distances.

• The features of the mass distribution of these mergers, combined with gravitational wave distance measurements, will enable precise cosmological inferences, even without the need for electromagnetic counterparts.
• However, achieving accurate results requires modeling the mass spectrum, particularly considering possible redshift evolution.
• Binary neutron star (BNS) mergers are thought to be less influenced by changes in metallicity compared to binary black holes (BBH) or neutron star-black hole (NSBH) mergers.