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X-WR-CALDESC:Events for LBNL Physics Division Research Progress Meetings
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DTSTART:20240101T000000
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DTSTART;TZID=UTC:20240416T160000
DTEND;TZID=UTC:20240416T170000
DTSTAMP:20260414T184631
CREATED:20240410T203009Z
LAST-MODIFIED:20240410T203009Z
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SUMMARY:Speaker: Julien Guy (LBNL) - Title: The Dark Energy Spectroscopic Instrument First Year Results: Cosmic Expansion History with Baryon Acoustic Oscillations
DESCRIPTION:Research Progress Meeting \nDate: April 16\, 2024 \nTime: 4:00- 5:00 pm  \nLocation: Sessler Conference Room- 50A-5132 [In-Person and HYBRID]  \nSpeaker: Julien Guy (LBNL) \nTitle: The Dark Energy Spectroscopic Instrument First Year Results: Cosmic Expansion History with Baryon Acoustic Oscillations \nAbstract: The Dark Energy Spectroscopic Instrument (DESI) collaboration 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 with baryon acoustic oscillations (BAO). I will present the measurement of BAO in galaxy\, quasar and Lyman-alpha forest tracers from the first year of observation. With 5.7 million galaxy and quasar redshifts in the range 0.1 < z < 2.1\, and 420\,000 Lyman-alpha forest quasars at higher redshift\, the aggregate precision on BAO is of 0.52% at z<2.1 and 1.1% at an effective redshift z=2.3\, surpassing in a year two decades of observations with the SDSS. I will present some of the numerous validation tests performed with simulations and blinded data. I will then highlight the main cosmological results\, with improved constraints on the dark energy equation of state\, the Hubble parameter\, spatial curvature\, and the sum of neutrino masses. \n\nJoin Zoom Meeting\nhttps://lbnl.zoom.us/j/95679892182?pwd=RU5xU2dDRFNabnR1U3pQMklkYWFIdz09 \nMeeting ID: 956 7989 2182 \nPasscode: 169037
URL:https://rpm.physics.lbl.gov/event/speaker-julien-guy-lbnl-title-the-dark-energy-spectroscopic-instrument-first-year-results-cosmic-expansion-history-with-baryon-acoustic-oscillations/
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