Wendy L. Freedman

John and Marion Sullivan University Professor of Astronomy and Astrophysics and the College

Wendy L. Freedman
ERC 535
(773) 834-5651
Julia Brazas
(773) 834-8401


PhD, University of Toronto, 1984

Research Fields

  • Observational cosmology
  • Hubble constant
  • Dark energy
  • Extragalactic distance scale
  • Supernovae
  • Cepheids
  • Galaxy evolution
  • Initial mass function

Research Groups

  • Freedman H0 Group
  • Initial Mass Function (IMF)

Scientific Projects

  • Carnegie Supernova Project
  • Carnegie-Chicago Hubble Program
  • Hubble Space Telescope Key Project


  • Taylor Hoyt (former graduate/Astronomy and Astrophysics)
  • Abby Lee (graduate/Astronomy and Astrophysics)
  • Kayla Owens (graduate/Astronomy and Astrophysics)
  • Finian Ashmead (former undergraduate/Astronomy and Astrophysics)
  • William Cerny (former undergraduate/Astronomy and Astrophysics)
  • Alexandra Masegian (former undergraduate/Astronomy and Astrophysics)
  • Blake Moss (former undergraduate/Astronomy and Astrophysics)
  • Elias Oakes (former undergraduate/Physics and Astronomy and Astrophysics)
  • Quang Tran (former undergraduate/Physics)


  • Anja Feldmeier-Krause (former)
  • In Sung Jang
  • Ilaria Lonoce (former)


Department Committees (2023-2024)

  • Appointments and Promotions (Chair)
  • Budget and Policy
  • Giant Magellan Telescope


Wendy Freedman's research is in observational cosmology (measures of the expansion rate of the universe using the Hubble Space Telescope, Spitzer Space Telescope and the ground-based Magellan telescope). Her current projects involve measurements of the Hubble constant -- the current expansion rate, as well as the past expansion rate, providing constraints on the acceleration of the universe and dark energy. Her other field of interest is the stellar populations of galaxies, the evolution of galaxies, and the initial mass function.

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