Cristhian Garcia Quintero and Paul Martini tell us about the baryon acoustic oscillation measurements in data release two (DR2) of the Dark Energy Spectroscopic Instrument (three years of data). As with the first data release they are seeing evidence for evolving dark energy. They now see it when combining with just CMB, or with “just” Dark Energy Survey supernovae and clustering data.
Relevant papers on the arXiv:
[2503.14739] DESI DR2 Results I: Baryon Acoustic Oscillations from the Lyman Alpha Forest
[2503.14741] Validation of the DESI DR2 Ly$α$ BAO analysis using synthetic datasets
[2503.14743] Extended Dark Energy analysis using DESI DR2 BAO measurements
[2503.14744] Constraints on Neutrino Physics from DESI DR2 BAO and DR1 Full Shape
Guide to DESI DR2 Results, dated 19-Mar-2025
Cristhian Garcia Quintero: gqcristhian.github.io
Paul Martini: OSU.edu
Cosmology Talks 