Speaker
Description
The Dark Energy Equation of State is not a direct observable. Some authors have suggested a connection between the Hubble tension and dynamical dark energy models, $w(z)$, supported by the recent DESI results, e.g., the CPL parameterization. Model-independent reconstructions — implemented with cubic splines, Gaussian processes, etc. — also suggest a dynamical behavior and generally make use of the luminosity distance $D_{L}(z)$. Gravitational wave observations from standard sirens provide a direct measurement of $D_{L}(z)$, allowing $w(z)$ to be constrained more directly and robustly, bypassing systematic errors. Our objective is then to generate simulated data assuming dynamical $w(z)$ parameterizations in order to make forecasts for upcoming surveys using Fisher matrix techniques. The application of inference methods, such as Markov Chain Monte Carlo or model-independent reconstructions, will then allow us to test the number of GW observations required to recover the known $w(z)$ from the simulations.
