Impact of modelling galaxy redshift uncertainties on the gravitational-wave dark standard siren measurement of the Hubble constant

Understand

Gravitational wave science is a new and rapidly expanding field of observational astronomy.

• Multimessenger observations of the binary neutron star merger GW170817 have provided some iconic results including the first gravitational-wave standard-siren measurement of the Hubble constant, opening up a new way to probe cosmology.
• The majority of the compact binary sources observed in gravitational waves are however without bright electromagnetic counterparts.
• In these cases, one can fall back on the ``dark standard siren'' approach to include information statistically from potential host galaxies.