| Abstract: |
The Dark Energy Spectroscopic Instrument (DESI) is conducting a 5 year redshift survey of 40 million extra-galactic sources over 14,000 square degrees of the northern sky. One of its primary goals is to measure the cosmic expansion history across a wide range of redshifts using baryon acoustic oscillations (BAO). The first DESI results, released in 2024, were based on the first year of data and showed intriguing hints that dark energy may not be described by a cosmological constant. In this talk, I will present the latest DESI BAO results which are based on the first three years of data. I will also present the cosmological implications of these measurements alone and in combination with cosmic microwave background, supernovae, and weak lensing experiments. These include constraints on the expansion rate of the Universe, the nature of dark energy, and the sum of the neutrino masses. |
