Speaker
Description
With third-generation gravitational-wave detectors, observations of binary neutron stars will enter a high-precision regime, enabling increasingly tight constraints on the neutron star equation of state. This improved sensitivity places strong demands on waveform accuracy, requiring a wide range of matter effects to be incorporated while keeping dimensionality low for efficient inference. Quasi-universal relations tackle this challenge by providing approximately equation of state independent mappings between neutron star properties, and are widely used in waveform modelling and parameter estimation. However, it is necessary to assess whether their accuracy remains sufficient for next-generation observations. This talk explores the robustness of current quasi-universal relations for Einstein Telescope observations, quantifies their impact on equation of state inference, and identifies where improvements are needed for future analyses.