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
  • PFC Executive committee
  • 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. "Measuring linear and non-linear galaxy bias using counts-in-cells in the Dark Energy Survey Science Verification data", Monthly Notices of the Royal Astronomical Society, Volume 482, Issue 2, p.1435-1451 (Nov 2019)
  2. "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)
  3. "First cosmological results using Type Ia supernovae from the Dark Energy Survey: measurement of the Hubble constant", Monthly Notices of the Royal Astronomical Society, Volume 486, Issue 2, p.2184-2196 (Jun 2019)
  4. "Withdrawn as Duplicate: Survey geometry and the internal consistency of recent cosmic shear measurements", Monthly Notices of the Royal Astronomical Society: Letters, Volume 486, Issue 1, p.L8-L8 (Jun 2019)
  5. "CIV Black Hole Mass Measurements with the Australian Dark Energy Survey (OzDES)", Monthly Notices of the Royal Astronomical Society, Advance Access (Jun 2019)
  6. "Dark Energy Survey Year 1 Results: Measurement of the Galaxy Angular Power Spectrum", Monthly Notices of the Royal Astronomical Society, Advance Access (Jun 2019)
  7. "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)
  8. "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)
  9. "First Measurement of the Hubble Constant from a Dark Standard Siren using the Dark Energy Survey Galaxies and the LIGO/Virgo Binary–Black-hole Merger GW170814", The Astrophysical Journal Letters, Volume 876, Issue 1, article id. L7, 15 pp. (2019) (May 2019)
  10. "Identification of RR Lyrae stars in multiband, sparsely-sampled data from the Dark Energy Survey using template fitting and Random Forest classification", arXiv:1905.00428 (May 2019)
  11. "Steve: A Hierarchical Bayesian Model for Supernova Cosmology", The Astrophysical Journal, Volume 876, Issue 1, article id. 15, 21 pp. (2019) (May 2019)
  12. "Cosmological Constraints from Multiple Probes in the Dark Energy Survey", Physical Review Letters, Volume 122, Issue 17, id.171301 (May 2019)
  13. "Dark Energy Survey Year 1 Results: Calibration of Cluster Mis-centering in the redMaPPer Catalogs", Monthly Notices of the Royal Astronomical Society, Advance Access (May 2019)
  14. "H0LiCOW XI: Spectroscopic/imaging survey and galaxy-group identification around the strong gravitational lens system WFI2033-4723", arXiv:1905.08800 (May 2019)
  15. "COSMOGRAIL XVIII: time delays of the quadruply lensed quasar WFI2033-4723", arXiv:1905.08260 (May 2019)
  16. "Seven New Distant Objects", Minor Planet Electronic Circ., No. 2019-J52 (2019) (May 2019)
  17. "Superluminous Supernovae from the Dark Energy Survey", Monthly Notices of the Royal Astronomical Society, Advance Access (May 2019)
  18. "Dark Matter Science in the Era of LSST", Astro2020: Decadal Survey on Astronomy and Astrophysics, science white papers, no. 207; Bulletin of the American Astronomical Society, Vol. 51, Issue 3, id. 207 (2019) (May 2019)
  19. "An extended catalog of galaxy-galaxy strong gravitational lenses discovered in DES using convolutional neural networks", arXiv:1905.10522 (May 2019)
  20. "Dark Energy Survey Year 1 Results: Wide field mass maps via forward fitting in harmonic space", arXiv:1905.12682 (May 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)