Orateur
Description
Recent data releases from the Atacama Cosmology Telescope (ACT DR6) and the Dark Energy Spectroscopic Instrument (DESI DR2) provide new insights into the viability of Early Dark Energy (EDE) as a resolution to the Hubble tension. In this talk, I will explore the implications of these recent measurements for EDE models. In particular, I will show that while ACT DR6 does not statistically prefer EDE over the standard ΛCDM model, it permits a significantly larger maximum EDE contribution in the pre-recombination era compared to constraints from Planck NPIPE, despite ACT's improved precision on small angular scales. I will also discuss the role of prior volume effects in Bayesian analyses and highlight the importance of complementing Bayesian inference with frequentist approaches.