Joshua A. Frieman

Theoretical Astrophysics Group, Fermilab; Professor, Dept. of Astronomy & Astrophysics

Ph.D., Physics, University of Chicago, 1985
 
Contact Information
Phone: (773)702-7971
Location: ERC 453
Email: friemanfnal.gov
WWW: Web Site
 
Research
The 2.5-meter telescope at Apache Point Observatory, named the Sloan Foundation Telescope in recognition of the pivotal and generous support of the Alfred P. Sloan Foundation through all phases of the SDSS.
Josh Frieman is a senior staff member (Scientist III) in the Theoretical Astrophysics group at Fermilab and the Fermilab Center for Particle Astrophysics. 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 currently serves as Director of the Dark Energy Survey, a collaboration of over 120 scientists from 20 institutions on 3 continents, which is building 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.

Ongoing Scientific Projects:

Past Scientific Projects: Sloan Digital Sky Survey (SDSS) | SDSS Supernova Survey (SDSS SS)
 
KICP Highlights & News

 
Talks, Lectures, & Workshops

 
Students
Past Students

GRADUATE: Jennifer Helsby (2015), Alan Zablocki (2015), Felipe Marin (2010), Carlos E. Cunha (2008), Benjamin E. Dilday (2008), David Johnston (2003), Jonathan Mitchell (2003), Craig Wiegert (2003)

UNDERGRADUATE: Paul Williams (2015), Alex Lanzano (2013), Rebecca Pierce (2013)
 
Currently in Committees
  • Wednesday Colloquium committee
  • Conferences, Workshops and Visitors committee (Chair)
  • Appointments committee
  • Executive committee
  • PFC Executive committee

 
KICP Publications
2019 | 2018 | 2017 | 2016 | 2015 | 2014 | 2013 | 2012 | 2011 | 2010 | 2009 | 2008 | 2007 | 2006 | 2005 | 2004 | 2003 | 2002 | 2001


Latest Journal Publications
  1. "First cosmology results using Type IA supernovae from the dark energy survey: effects of chromatic corrections to supernova photometry on measurements of cosmological parameters", Monthly Notices of the Royal Astronomical Society, Volume 485, Issue 4, p.5329-5344 (Jun 2019)
  2. "Weak-lensing analysis of SPT-selected galaxy clusters using Dark Energy Survey Science Verification data", Monthly Notices of the Royal Astronomical Society, Volume 485, Issue 1, p.69-87 (May 2019)
  3. "First cosmology results using Type Ia supernova from the Dark Energy Survey: simulations to correct supernova distance biases", Monthly Notices of the Royal Astronomical Society, Volume 485, Issue 1, p.1171-1187 (May 2019)
  4. "More out of less: an excess integrated Sachs-Wolfe signal from supervoids mapped out by the Dark Energy Survey", Monthly Notices of the Royal Astronomical Society, Volume 484, Issue 4, p.5267-5277 (Apr 2019)
  5. "Finding high-redshift strong lenses in DES using convolutional neural networks", Monthly Notices of the Royal Astronomical Society, Volume 484, Issue 4, p.5330-5349 (Apr 2019)
  6. "Dark Energy Survey Year 1 Results: Detection of Intracluster Light at Redshift ∼ 0.25", The Astrophysical Journal, Volume 874, Issue 2, article id. 165, 19 pp. (2019) (Apr 2019)
  7. "First Cosmology Results Using SNe Ia from the Dark Energy Survey: Analysis, Systematic Uncertainties, and Validation", The Astrophysical Journal, Volume 874, Issue 2, article id. 150, 29 pp. (2019) (Apr 2019)
  8. "Modelling the Milky Way. I - Method and first results fitting the thick disk and halo with DES-Y3 data", arXiv:1904.04350 (Apr 2019)
  9. "First Cosmological Results using Type Ia Supernovae from the Dark Energy Survey: Measurement of the Hubble constant", Monthly Notices of the Royal Astronomical Society, Advance Access (Apr 2019)
  10. "First Cosmology Results Using Type ia Supernovae from the Dark Energy Survey: Effects of Chromatic Corrections to Supernova Photometry on Measurements of Cosmological Parameters", Monthly Notices of the Royal Astronomical Society, Advance Access (Mar 2019)
  11. "Transfer learning for galaxy morphology from one survey to another", Monthly Notices of the Royal Astronomical Society, Volume 484, Issue 1, p.93-100 (Mar 2019)
  12. "Is every strong lens model unhappy in its own way? Uniform modelling of a sample of 13 quadruply+ imaged quasars", Monthly Notices of the Royal Astronomical Society, Volume 483, Issue 4, p.5649-5671 (Mar 2019)
  13. "Candidate massive galaxies at z ˜ 4 in the Dark Energy Survey", Monthly Notices of the Royal Astronomical Society, Volume 483, Issue 3, p.3060-3081 (Mar 2019)
  14. "Astrometry and Occultation Predictions to Trans-Neptunian and Centaur Objects Observed within the Dark Energy Survey", The Astronomical Journal, Volume 157, Issue 3, article id. 120, 15 pp. (2019) (Mar 2019)
  15. "A Search for Optical Emission from Binary Black Hole Merger GW170814 with the Dark Energy Camera", The Astrophysical Journal Letters, Volume 873, Issue 2, article id. L24, 9 pp. (2019) (Mar 2019)
  16. "Transfer learning for galaxy morphology from one survey to another", Monthly Notices of the Royal Astronomical Society, Volume 484, Issue 1, p.93-100 (Mar 2019)
  17. "First Cosmology Results Using Type ia Supernovae from the Dark Energy Survey: Effects of Chromatic Corrections to Supernova Photometry on Measurements of Cosmological Parameters", Monthly Notices of the Royal Astronomical Society, Advance Access (Mar 2019)
  18. "Dark Matter Science in the Era of LSST", arXiv:1903.04425 (Mar 2019)
  19. "Mass Variance from Archival X-ray Properties of Dark Energy Survey Year-1 Galaxy Clusters", arXiv:1903.08042 (Mar 2019)
  20. "Stellar mass as a galaxy cluster mass proxy: application to the Dark Energy Survey redMaPPer clusters", arXiv:1903.08813 (Mar 2019)

Latest Conference Proceedings
  1. "Dark energy survey operations: years 4 and 5", Proceedings of the SPIE, Volume 10704, id. 107040D 18 pp. (2018) (Jul 2018)
  2. "The dark energy survey and operations: years 1 to 3", Proceedings of the SPIE, Volume 9910, id. 99101D 19 pp. (2016) (Jul 2016)
  3. "Properties of type Ia supernovae inside rich galaxy clusters", XIV Latin American Regional IAU Meeting (Eds. A. Mateus, J. Gregorio-Hetem & R. Cid Fernandes) Revista Mexicana de Astronomía y Astrofísica (Serie de Conferencias) Vol. 44, pp. 206-206 (2014) (Oct 2014)
  4. "The Dark Energy Survey and operations: Year 1", Proceedings of the SPIE, Volume 9149, id. 91490V 15 pp. (2014) (Aug 2014)
  5. "The Dark Energy Survey: Overview", American Astronomical Society, AAS Meeting #221, id.#335.01 (Jan 2013)
  6. "Correlations Between Type Ia Supernovae and Their Host Galaxies Using the SDSS and Multi-wavelength Photometry", American Astronomical Society, AAS Meeting #221, id.#106.06 (Jan 2013)
  7. "The Dark Energy Spectrometer: a potential multi-fiber instrument for the Blanco 4-meter Telescope", Ground-based and Airborne Instrumentation for Astronomy IV. Proceedings of the SPIE, Volume 8446, article id. 844656, 13 pp. (2012) (Sep 2012)
  8. "Dark Energy Spectrometer - A Proposed Multi-Fiber Instrument for the Blanco 4 Meter Telescope", American Astronomical Society, AAS Meeting #219, #422.09 (Jan 2012)
  9. "WFC3 and WFPC2 Follow Up of Strong Gravitational Lenses", American Astronomical Society, AAS Meeting #217, #347.03; Bulletin of the American Astronomical Society, Vol. 43, 2011 (Jan 2011)
  10. "SBAS: The Sloan Bright Arcs Survey", American Astronomical Society, AAS Meeting #217, #347.01; Bulletin of the American Astronomical Society, Vol. 43, 2011 (Jan 2011)

 
Visitors
Past Visitors:
  1. Aurélien Benoit-Lévy, University College London / Institut d'Astrophysique de Paris (2016)
  2. Marcelle Soares-Santos, Fermilab (2016)
  3. Keith Bechtol, WIPAC / University of Wisconsin-Madison (2015)
  4. Chihway Chang, ETH Zurich (2015)
  5. Steve Kahn, Stanford National Accelerator Laboratory (2014)
  6. Brian Nord, Fermilab (2014)
  7. Natalie Roe, LBNL (2014)
  8. Florian Beutler, University of Western Australia (2012)
  9. Felipe Marin, Swinburne University (2011)
  10. Roberto Trotta, Imperial College London (2011)
  11. Felipe Marin, Swinburne University (2010)
  12. Tamara Davis, University of Queensland (2009)
  13. Renee Hlozek, University of Oxford (2009)
  14. Alexandra Abate, University College London (2008)
  15. Manda Banerji, University College London (2008)
  16. Alison Coil, University of California, San Diego (2008)
  17. Tamara Davis, University of Queensland (2008)
  18. Eanna Flanagan, Cornell University (2008)
  19. Marcelo Gleiser, Dartmouth College (2008)
  20. Ofer Lahav, University College London (2008)
  21. Julie McEnery, NASA, Goddard Space Flight Center (2008)
  22. Jean Quashnock, Carthage College (2007)
  23. Mat Smith, University of Portsmouth (2007)
  24. Joseph Zuntz, Imperial College, London (2007)
  25. Anna Cabre Albos, Institut d'Estudis Espacials de Catalunya (2006)
  26. David Cinabro, Wayne State University (2006)
  27. Rogerio Rosenfeld, Instituto de Fisica Teorica-UNESP (2006)
  28. Masao Sako, University of Pennsylvania (2006)
  29. Brandon Allgood, University of California, Santa Cruz (2005)
  30. Lifan Wang, Lawrence Berkeley National Laboratory (2005)
  31. Alexander Conley, University of California, Berkeley (2004)
  32. Masao Sako, Stanford University (2004)
  33. Roman Scoccimarro, New York University (2004)
  34. Andreas Berlind, New York University (2003)
  35. Enrique Gaztanaga, Instituto Nacional de Astrofisica (2002)
  36. Timothy McKay, University of Michigan (2002)
  37. Erin Sheldon, University of Michigan (2002)