Speaker
Description
The Hubble constant is one of the most important cosmological parameters. However, current estimates diverge significantly: local measurements (e.g., SH0ES) suggest $H_0 \approx 73$ km/s/Mpc, while CMB-based results (e.g., Planck) yield $\approx 67$ km/s/Mpc — a tension of $4$–$5\sigma$. Several endeavors have been made to reconcile the two results. One of these attempts is the use of gravitational waves as a standard siren, analogous to standard candles. The GW analysis provides a direct way to estimate the luminosity distance at cosmological scales, without the need for any intermediate astronomical distance measurements. This work explores cosmological inference using bright sirens within a dynamical framework, taking into account the 3G detectors, the Einstein Telescope, and the Cosmic Explorer. Employing DALI (Derivative Approximation for Likelihoods), we estimate cosmological parameters using Gaussian and Beyond-Gaussian likelihoods.
