Constraints on the modified emergent dark energy model using DESI DR2 BAO — E8 Intelligence Research

In this work, we investigated the modified emergent dark energy model using the baryon acoustic oscillation data from the Dark Energy Spectroscopic Instrument Data Release 2, together with CMB information from the LoLLiPoP (low-ℓ) and HiLLiPoP (high-ℓ) likelihoods based on the latest Planck NPIPE PR4 data release, along with the Planck PR4 lensing and ACT DR6 lensing likelihoods, as well as three different Type Ia supernova datasets (Pantheon + , DES-Dovekie, and Union3). Our analysis shows that the MEDE model remains largely consistent with the standard ΛCDM cosmology. Although the model allows small deviations from ΛCDM, the inclusion of SNe Ia datasets drives the parameters toward values consistent with the standard cosmological model within the 1σ level. In particular, the parameter α does not show any statistically significant deviation from α=0. We further find that the MEDE model does no Author: Andrew Stewart Caldin, Independent Researcher, UK. Part of the E8 Intelligence Research series. Platform: e8intelligence.com