Orateur
Description
The Dark Energy Spectroscopic Instrument (DESI) Collaboration, when combining their baryonic acoustic oscillation observations with measurements of supernova surveys and cosmic microwave background data, inference of a best fit cosmology with a time-varying dark energy motivates independent observational tests of a departure from a cosmological constant dark energy. I will discuss the results of a limited set of hydrodynamic cosmological simulations on how a dynamical dark energy component may imprint itself on the Lyman Alpha forest of neutral hydrogen absorption. In comparing a dynamical dark energy cosmology of the kind inferred by the DESI Collaboration to one evolved with a cosmological constant, we find a redshift-dependent spectral tilt in the transmitted flux power spectrum. These dynamical dark energy models exhibit a slightly warmer intergalactic medium and a lower Lyman Alpha optical depth.