A weakly modelled view of the joint compact-binary mass plane: population structure and spectral-siren cosmology
This research introduces a flexible model to simultaneously infer compact binary mass distributions and cosmological parameters like H0. By using a two-dimensional approach, the study identifies distinct population structures, showing that dominant features are governed by a common mass scale while weaker ones retain dependence on the mass ratio. This suggests that fully understanding these populations requires viewing them in two dimensions.