Overview
Use observational tools to measure the expansion history of the universe. Trying to answer big questions like 'what is dark energy?'.
Current Duke Appointments & Affiliations
Professor of Physics
·
2026 - Present
Physics,
Trinity College of Arts & Sciences
Associate Professor in the Department of Electrical and Computer Engineering
·
2025 - Present
Pierre R. Lamond Department of Electrical and Computer Engineering,
Pratt School of Engineering
Recent Scholarly Works
Calibration-induced Systematics in SALT3 Training and Their Impact on Dark Energy Constraints from Stage IV Supernova Surveys
Journal article Astrophysical Journal · October 10, 2026 In the coming years, the Vera Rubin Observatory’s Legacy Survey of Space and Time (Rubin-LSST) and the Nancy Grace Roman Space Telescope’s (Roman) High Latitude Time Domain Survey (HLTDS) are expected to discover more than a million Type Ia supernovae (SNe ... Full text CiteSupernovae Unite: Host-Galaxy Mass Measurements of Type Ia Supernovae and Their Impact on Cosmology
Preprint · September 4, 2026 Current consensus suggests that Type Ia supernova (SN Ia) brightnesses post light-curve standardization correlate with their host-galaxy stellar masses, which must be accounted for to obtain accurate cosmological constraints. For example, Vincenzi et al. ( ... Link to item CiteSupernovae Unite: Combining Pantheon+ and DES-SN5YR
Preprint · September 4, 2026 We present the Hubble diagram and cosmological constraints resulting from the combination of the Pantheon+ and DES-SN5YR supernova (SN) samples, which we refer to as Unite. Unite updates Pantheon+, including methodology improvements that the DES sample ena ... Link to item CiteRecent Grants
Research in High Energy Physics at Duke University
ResearchCo Investigator · Awarded by Department of Energy · 2013 - 2029A Roman Project Infrastructure Team to Support Cosmological Measurements with Type Ia Supernovae
ResearchPrincipal Investigator · Awarded by National Aeronautics and Space Administration · 2023 - 2028Big Data and the Biggest Tension in Cosmology
ResearchPrincipal Investigator · Awarded by David & Lucile Packard Foundation · 2019 - 2027View All Grants
Education
Johns Hopkins University ·
2013
Ph.D.
Massachusetts Institute of Technology ·
2007
B.S.