Physics Colloquium

Abstract:

The current generation of redshift surveys will provide three-dimensional maps of the Universe with tens of millions of galaxies spanning much of the observable universe.  These maps explore physics beyond the standard model, including the physics of dark energy and early universe inflation.

 I will present measurements of cosmic expansion and dark energy from the first year of the Dark Energy Spectroscopic Instrument (DESI).  DESI is mapping the sky with a 5000-fiber robotic focal plane and 10 optical spectrographs.  I will describe the design of the instrument, the survey, and the analysis of the first 5 million galaxies and quasars.

Join via Zoom:
https://caltech.zoom.us/j/89860951893
Meeting ID: 818 6692 9019

The colloquium is held in Feynman Lecture Hall, 201 E. Bridge.