Daisy S. Bissonette
Eckhardt Research Center
5640 S Ellis Ave,
Chicago, IL 60637
I’m a Ph.D. candidate in Astronomy and Astrophysics at the University of Chicago. Originally from Upstate New York, I completed my A.B. in Astrophysical Sciences with honors at Princeton in 2023.
I measure stellar metallicities in ultra-faint dwarf galaxies to study the earliest phases of galaxy formation and chemical enrichment. Most of my work centers on building analysis pipelines for low- and medium-resolution spectra: spectral fitting, statistical inference on small samples, and uncertainty quantification.
I also work on access to science education. I’ve served on a DEIB advisory board for PhET STEM education tools used by millions of students, hosted a virtual department open house for prospective PhD students at UChicago, tutored for over six years, and current focus on running public science events on Chicago’s South Side. The resources pages here collect what I’ve learned about fee waivers, funding, and applications.
Outside of research, I love to run, kayak, tend to my community garden plot, and work on my watercolor painting skills.
news
| Aug 20, 2026 | I am starting to add information and links to the high school and higher ed resources pages. |
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| May 12, 2026 | I published my first first-author paper of graduate school! Check it out here (published version: DOI). |
selected publications
- The Metallicity Distribution of the Ultra-Faint Dwarf Galaxy Segue 1The Open Journal of Astrophysics, Oct 2026
- No Observational Evidence for Dark Matter Nor a Large Metallicity Spread in the Extreme Milky Way Satellite Ursa Major III/UNIONS 1The Astrophysical Journal Letters, Mar 2026
- A Chemodynamical Census of the Milky Way’s Ultra-Faint Compact Satellites. I. A First Population-Level Look at the Internal Kinematics and Metallicities of 19 Extremely-Low-Mass Halo Stellar SystemsarXiv e-prints, Feb 2026