Cosmology from the First Year DESI BAO Measurements

May 14, 2024 - 3:30 pm to 4:30 pm

Campus, Hewlett Teaching Center, Rm. 201

Kyle Dawson (University of Utah)

Refreshments served in the Varian lobby outside of the Physics main office at 4:30 p.m.

Over a five-year period, the Dark Energy Spectroscopic Instrument (DESI) will spectroscopically classify nearly 40 million galaxies and quasars over 1/3 of the sky and to redshifts z < 3.5.  The DESI collaboration recently completed the measurement of the baryon acoustic oscillation (BAO) feature in seven distinct redshift intervals using data from the first year of observation.  In this talk, I will present those BAO measurements and their implications for our understanding of the cosmological model.  In particular, I will discuss the constraints on the Hubble Constant, dark energy equation of state, curvature, and summed mass of the three neutrino mass eigenstates.  In doing so, I will discuss the new and future DESI measurements with respect to the hints of tension that have been reported in the Hubble Constant and with LCDM in general.