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

Remote Sensing Infrasound using a “Space Microphone”
Ken Obenberger (AFRL)
CART Astrophysics Seminar Series
Apr. 23, 2:00 PM - Apr. 23, 3:00 PM
PAIS 3205

Information scrambling and the learning landscape of a quantum machine learning
Sabre Kais
CQuIC Seminars
Apr. 23, 3:30 PM - Apr. 23, 4:30 PM
PAIS 2540

Dual-comb spectroscopy from terahertz to petahertz and beyond
Konstantin Vodopyanov (CREOL)
Physics and Astronomy Colloquium
Apr. 24, 3:30 PM - Apr. 24, 4:30 PM
PAIS 1100

UNM Physics Day 2026
Diana Dragomir
Outreach
Apr. 25, 8:45 AM - Apr. 25, 3:00 PM
PAIS 1100

From Idealized Forecasts to Realistic Inference of Dark Matter Physics with Milky Way Satellites
Soumyodipta Karmakar (UNM)
Nuclear, Particle, Astroparticle and Cosmology (NUPAC) Seminars
Apr. 28, 2:00 PM
PAIS 3205