Most of our universe is composed forms of mass-energy which we do not understand, and which is outside the current model of particle physics. In my group we pursue the physics of dark matter and dark energy via weak gravitational lensing probes of the universe and a laboratory dark matter direct detection experiment.   We do this with state-of-the-art astronomical observations of millions of galaxies [the Deep Lens Survey, DLS] and by building next-generation capability to map billions of galaxies [the Large Synoptic Survey Telescope, LSST].  The lab experiment is called "dark radio."

Using the DLS we have recently measured the dark matter power spectrum normalization, detected the growth in dark matter halos associated with galaxies over cosmic time, and demonstrated the new technique of weak lens cosmic magnification tomography.

We developed the LSST project mainly as a cosmological tool.  Under development for over a decade, the LSST construction project was funded in 2014 by the NSF and DOE, and we expect “first light” in 2020. DLS is a precursor to the LSST survey, so we can use it to develop and test novel cosmology analysis algorithms for the LSST data.  We also build instrumentation for LSST: we have labs in which we test the LSST charge coupled device detectors in a realistic LSST optical beam.

There are ongoing opportunities for creative advanced undergraduate and graduate students to join our research group. Depending on your interests, you can combine work on hardware and software development, and data analysis, to meet your own ambitions.

News & Events

Workshop on Foreground Physical Effects and Weak Lensing
UC Davis Conference Center, December 14-15, 2015. 

Celebration of LSST construction start.  Cerro Pachon Chile, April

NSF authorizes LSST for construction. August 201

James Jee  wins GREAT3 competition.  May 2014


2019:  LSST gears up for commissioning

Contact Us

Tony Tyson
514 Physics 
University of California, Davis
One Shields Avenue
Davis, CA 95616

tyson "at"

(530) 752-3830 office 
(530) 400-0406 cell