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SUMMARY:DESI DR2: Survey overview and cosmological constraints from DR2 Ba
 ryon Acoustic Oscillation measurements - Arnaud de Mattia (IRFU\, CEA\, Un
 iversité Paris-Saclay)
DTSTART:20250512T120000Z
DTEND:20250512T130000Z
UID:TALK225760@talks.cam.ac.uk
CONTACT:Louis Legrand
DESCRIPTION:The Dark Energy Spectroscopic Instrument (DESI) is undertaking
  a five-year survey spanning 14\,000 square degrees of the sky\, with the 
 goal of mapping 40 million extragalactic redshifts. These observations aim
  to refine our understanding of the universe’s expansion history through
  Baryon Acoustic Oscillations (BAO) and the growth of cosmic structure via
  Full Shape analyses. In 2025\, the DESI collaboration released BAO cosmol
 ogy results from the Data Release 2 (DR2) sample\, assembled from the firs
 t three years of data taking (2021 - 2024).\nThis presentation will introd
 uce the instrument and the survey and review the BAO measurements derived 
 from DR2. I will discuss the consistency of BAO constraints with other pro
 bes---CMB (including the latest ACT DR6 CMB data) and supernovae---and pre
 sent cosmological constraints on dark energy and neutrino masses.\nI will 
 conclude by providing an outlook on upcoming DESI analyses.
LOCATION: SPECIAL LOCATION - CMS\, MR5\, Pav A basement
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