Bradford A. Benson

Wilson Fellow and Associate Scientist at Fermi National Accelerator Laboratory; KICP Senior member

Ph.D., Physics, Stanford University, 2004
Contact Information
Phone: (773) 702-6452
Location: ERC 435
WWW: Web Site
At the South Pole.
I am an experimental cosmologist and mm-wavelength astronomer whose research focuses on studies of structure formation, and measurements of fine-scale cosmic microwave background (CMB) temperature and polarization anisotropy.

I am interested in the following questions: What is the nature of dark energy? What is the energy scale of Inflation? What is the mass of the neutrino? What was the nature of the first stars, galaxies, and active galactic nuclei in the universe? How did they affect the growth of cosmic structures?

Ongoing Scientific Projects:

Past Scientific Projects: Interferometric Sunyaev-Zel'dovich Effect Imaging Experiment (SZE)
KICP Highlights & News

Talks, Lectures, & Workshops

Past Students

UNDERGRADUATE: Alexander Droster (2017), Carina Baker (2014)
Currently in Committees
  • Conferences, Workshops and Visitors committee

KICP Publications
2019 | 2018 | 2017 | 2016 | 2015 | 2014 | 2013 | 2012 | 2011 | 2010 | 2009 | 2008

Latest Journal Publications
  1. "Galaxy kinematics and mass calibration in massive SZE-selected galaxy clusters to z = 1.3", Monthly Notices of the Royal Astronomical Society, Volume 482, Issue 1, p.1043-1061 (Jan 2019)
  2. "Cluster Cosmology Constraints from the 2500 deg$^2$ SPT-SZ Survey: Inclusion of Weak Gravitational Lensing Data from Magellan and the Hubble Space Telescope", arXiv:1812.01679 (Dec 2018)
  3. "Dark Energy Survey Year 1 Results: A Precise H0 Estimate from DES Y1, BAO, and D/H Data", Monthly Notices of the Royal Astronomical Society, Volume 480, Issue 3, p.3879-3888 (Nov 2018)
  4. "Maps of the Southern Millimeter-wave Sky from Combined 2500 deg2 SPT-SZ and Planck Temperature Data", The Astrophysical Journal Supplement Series, Volume 239, Issue 1, article id. 10, 14 pp. (2018) (Nov 2018)
  5. "Optical Characterization of the SPT-3G Camera", Journal of Low Temperature Physics, Volume 193, Issue 3-4, pp. 305-313 (Nov 2018)
  6. "Measurement of the Splashback Feature around SZ-selected Galaxy Clusters with DES, SPT and ACT", arXiv:1811.06081 (Nov 2018)
  7. "Measuring Cross-Spectra of the Cosmic Infrared Background from 95 to 1200 GHz", arXiv:1810.10643 (Oct 2018)
  8. "Mass Calibration of Optically Selected DES clusters using a Measurement of CMB-Cluster Lensing with SPTpol Data", arXiv:1810.10998 (Oct 2018)
  9. "Dark Energy Survey Year 1 Results: tomographic cross-correlations between DES galaxies and CMB lensing from SPT+Planck", arXiv:1810.02342 (Oct 2018)
  10. "Dark Energy Survey Year 1 Results: Joint Analysis of Galaxy Clustering, Galaxy Lensing, and CMB Lensing Two-point Functions", arXiv:1810.02322 (Oct 2018)
  11. "Cosmological lensing ratios with DES Y1, SPT and Planck", arXiv:1810.02212 (Oct 2018)
  12. "Dark Energy Survey Year 1 Results: Cross-correlation between DES Y1 galaxy weak lensing and SPT+Planck CMB weak lensing", arXiv:1810.02441 (Oct 2018)
  13. "A Detailed Study of the Most Relaxed SPT-Selected Galaxy Clusters: Cool Core and Central Galaxy Properties", arXiv:1809.09104 (Sep 2018)
  14. "Baryon content in a sample of 91 galaxy clusters selected by the South Pole Telescope at 0.2 <z < 1.25", Monthly Notices of the Royal Astronomical Society, Volume 478, Issue 3, p.3072-3099 (Aug 2018)
  15. "Design and characterization of the SPT-3G receiver", arXiv:1809.00032 (Aug 2018)
  16. "Dark Energy Survey year 1 results: Cosmological constraints from galaxy clustering and weak lensing", Physical Review D, Volume 98, Issue 4, id.043526 (Aug 2018)
  17. "X-ray Properties of SPT Selected Galaxy Clusters at 0.2<z<1.5 Observed with XMM-Newton", arXiv:1807.02556 (Jul 2018)
  18. "Galaxy populations in the most distant SPT-SZ clusters - I. Environmental quenching in massive clusters at $1.4lesssim zlesssim1.7$", arXiv:1807.09768 (Jul 2018)
  19. "Cosmology with the South Pole Telescope: Status and Future Plans", 42nd COSPAR Scientific Assembly. Held 14-22 July 2018, in Pasadena, California, USA, Abstract id. E1.2-26-18 (Jul 2018)
  20. "Constraints on Cosmological Parameters from the Angular Power Spectrum of a Combined 2500 deg2 SPT-SZ and Planck Gravitational Lensing Map", The Astrophysical Journal, Volume 860, Issue 2, article id. 137, 9 pp. (2018) (Jun 2018)

Latest Conference Proceedings
  1. "Broadband anti-reflective coatings for cosmic microwave background experiments", Proceedings of the SPIE, Volume 10708, id. 1070843 13 pp. (2018) (Jul 2018)
  2. "Characterization and performance of the second-year SPT-3G focal plane", Proceedings of the SPIE, Volume 10708, id. 107081Z 13 pp. (2018) (Jul 2018)
  3. "Year two instrument status of the SPT-3G cosmic microwave background receiver", Proceedings of the SPIE, Volume 10708, id. 1070803 21 pp. (2018) (Jul 2018)
  4. "X-ray Scaling Relations of SPT Selected Galaxy Clusters Observed with XMM-Newton", American Astronomical Society, AAS Meeting #229, id.404.09 (Jan 2017)
  5. "Integrated performance of a frequency domain multiplexing readout in the SPT-3G receiver", Proceedings of the SPIE, Volume 9914, id. 99141D 11 pp. (2016) (Jul 2016)
  6. "Large arrays of dual-polarized multichroic TES detectors for CMB measurements with the SPT-3G receiver", Proceedings of the SPIE, Volume 9914, id. 991417 11 pp. (2016) (Jul 2016)
  7. "Still Red and Dead? Measuring feedback and star-formation in clusters at z > 1", American Astronomical Society, AAS Meeting #228, id.118.07 (Jun 2016)
  8. "Sunyaev Zel'dovich Cluster Surveys", American Astronomical Society, HEAD meeting #14, id.102.01 (Aug 2014)
  9. "SPT-3G: a next-generation cosmic microwave background polarization experiment on the South Pole telescope", Proceedings of the SPIE, Volume 9153, id. 91531P 21 pp. (2014) (Jul 2014)
  10. "RedMaPPEr selected clusters from DES science verification data and their SPT-SZE signature", Building the Euclid Cluster Survey - Scientific Program, proceedings of a conference held July 6-11 2014 at the Sexten Center for Astrophysics. Online at, i

Past Visitors:
  1. Sebastian Bocquet, LMU Munich (2015)
  2. Fabian Koehlinger, Leiden Observatory (2015)
  3. Alexander van Engelen, Canadian Institute for Theoretical Astrophysics (2015)
  4. Rahlin Alexandra, Princeton University (2014)
  5. Neelima Sehgal, KIPAC, Stanford University (2011)