Speaker
Description
The Dark Energy Spectroscopic Instrument (DESI) is conducting a five-year spectroscopic survey of 40 million galaxies and quasars, designed to map the cosmic expansion history and the growth of large-scale structure across the redshift range 0.1<z<3.5. Over the past year, the collaboration has released measurements of the baryon acoustic oscillation (BAO) scale from galaxies, quasars, and the Lyman-alpha forest, along with its first full-shape analyses of the power spectrum multipoles.
In this talk, I will present key cosmological results derived from DESI DR1 and DR2 data, with a focus on emerging indication for an evolving dark energy equation of state when DESI measurements are combined with other cosmological datasets. I will discuss the latest cosmological interpretations of these results, highlighting their implications for dark energy models, possible modifications to general relativity, and persistent tensions among current cosmological datasets.
