Five parameters are all you need

In ΛCDM, we demote the optical depth τ_reio to a derived parameter with analytic modeling and symbolic regression of 21cmFAST reionization timelines, and tighten constraints on τ and A_s remarkably by reanalyzing Planck data.

• arXiv URL: https://arxiv.org/abs/2405.13680
• journal URL: DOI URL