Overview
Use observational tools to measure the expansion history of the universe. Trying to answer big questions like 'what is dark energy?'.
Current Appointments & Affiliations
Associate Professor of Physics
·
2023 - Present
Physics,
Trinity College of Arts & Sciences
Recent Publications
Calibrating the absolute magnitude of type Ia supernovae in nearby galaxies using [O ii] and implications for H0
Journal Article
Monthly Notices of the Royal Astronomical Society
·
April 1, 2025
The present state of cosmology is facing a crisis where there is a fundamental disagreement in measurements of the Hubble constant (), with significant tension between the early and late Universe methods. Type Ia supernovae (SNe Ia) are important to measur ...
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Cite
Reduction of the type Ia supernova host galaxy step in the outer regions of galaxies
Journal Article Monthly Notices of the Royal Astronomical Society · March 1, 2025 Using 1533 type Ia supernovae (SNe Ia) from the 5-yr sample of the Dark Energy Survey (DES), we investigate the relationship between the projected galactocentric separation of the SNe and their host galaxies and their light curves and standardization. We s ... Full text CiteMeasuring the Distances to Asteroids from One Observatory in One Night with Upcoming All-Sky Telescopes
Preprint · February 19, 2025 Full text CiteRecent Grants
A 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 - 2027SN cosmology with the next generation of experiments
FellowshipPrincipal Investigator · Awarded by National Aeronautics and Space Administration · 2023 - 2026View All Grants