Joshua Frieman

Senior Member, KICP
Professor, Department of Astronomy and Astrophysics and the College
Chair, Department of Astronomy and Astrophysics

Joshua Frieman
Eckhardt Research Center
Room 453
5640 South Ellis Avenue
Chicago, IL 60637
(773) 702-7971


Josh Frieman is the Particle Physics Division (PPD) Head and a senior staff member  in the Theoretical Astrophysics group at Fermilab and the Fermilab Cosmic Physics Center. He is also Professor of Astronomy and Astrophysics at the University of Chicago, where he is a member of the Kavli Institute for Cosmological Physics.
Frieman earned a B.Sc. degree from Stanford (1981) and a PhD in Physics from the University of Chicago (1985). After a postdoc in the SLAC Theory Group, he joined the scientific staff at Fermilab in 1988. He served as Head of the Theoretical Astrophysics Group from 1994 to 1999. He is a Fellow of the American Physical Society and of the American Association for the Advancement of Science and a Trustee of the Aspen Center for Physics. He has served on the Executive Committee of the APS Divison of Astrophysics, on the Particle Physics Project Prioritization Panel (P5) of HEPAP, on the Astro 2010 Decadal Survey Committee, and on the Astronomy and Astrophysics Advisory Committee (AAAC).


Frieman's research centers on theoretical and observational cosmology, including studies of the nature of dark energy, the early Universe, gravitational lensing, the large-scale structure of the Universe, and supernovae as cosmological distance indicators. The author of over 230 publications, he led the Sloan Digital Sky Survey (SDSS-II) Supernova Survey, which discovered over 500 type Ia supernovae for cosmology studies, and served as chair of the SDSS Collaboration Council. He is a founder of, and served as, the Director of the Dark Energy Survey (DES), a collaboration of over 400 scientists from 25 institutions from around the world, which built the DECam, a 570-Megapixel camera, to carry out a wide-field survey on the Blanco 4-meter telescope at Cerro Tololo Inter-American Observatory in Chile to probe the origin of cosmic acceleration.

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