Measuring Cosmic Sound with the Dark Energy Spectroscopic Instrument

  • Physics and Astronomy Colloquium

May 16, 2025 3:30 PM - May 16, 2025 4:30 PM
PAIS 1100

Host:
Dinesh Loomba
Presenter:
Daniel Eisenstein (Harvard)
Video recording
I will describe recent results from the Dark Energy Spectroscopic Instrument (DESI) on the measurement of the cosmic distance scale with the baryon acoustic oscillation (BAO) method and its resulting implications for cosmology and dark energy.  I'll start with an introduction to BAO physics and its use as a cosmological standard ruler, as well as to the design and status of the DESI project.  Then I'll turn to the results from the first three years of data, which provide sub-percent measurements of cosmological distance and a tantalizing suggestion of a breakdown of the cosmological constant model.  Cosmology is no longer at a moment of concordance, and I will close by attempting to summarize the current state of play.

Upcoming Events

Intro to Photonics Experience courtesy of ThorLabs
ThorLabs
No Affiliation
Outreach
Feb. 24, 12:00 AM - Feb. 26, 4:00 PM
Yale Mall, west of PAIS, UNM Main Campus

A Search for New Physics in Decays of B Mesons to Muon Pairs, Characterization of Radiation Damage in Silicon Detectors at the Large Hadron Collider, and Development of New Particle Timing Technology
Hijas Farook (UNM)
Nuclear, Particle, Astroparticle and Cosmology (NUPAC) Seminars
Feb. 24, 2:00 PM
PAIS 3205

Title TBD
Bryan Butler (NRAO)
Physics and Astronomy Colloquium
Feb. 27, 3:30 PM - Feb. 27, 4:30 PM
PAIS 1100

Hunting for Exotic Matter: How AI is Helping Our Search for the Strange Side of Quantum Physics
Cesar Luis Da Silva (LANL)
Nuclear, Particle, Astroparticle and Cosmology (NUPAC) Seminars
Mar. 3, 2:00 PM
PAIS 3205

TBD
Susmita Garai (UNM EPS)
CART Astrophysics Seminar Series
Mar. 5, 2:00 PM - Mar. 5, 3:00 PM
PAIS 3205