Research
I am currently a graduate fellow in astrophysics at the University of California, Berkeley, Berkeley, where I work in the Transients, Extragalactic group (TREX) studying the most extreme explosions in the universe. This includes supernovae, gamma ray bursts (GRBs), tidal disruption events (TDEs), and other transient phenomena. My research focuses bridging theory and observation to model and understand these transients, their host environments, and their emission mechanisms. Before this, I held research roles at the University of Utah in both astrophysics and biomedical data science.
My present research focuses on theory, modeling, and observation of various classes of astrophysical transients. In particular, I am currently interested in some of the following topics:
- The nature of luminous fast blue optical transients (LFBOTs) and their progenitors.
- Methods for improving the study of transients in the radio band, particularly synchrotron modeling beyond the standard equipartition assumption.
- The role of binary interactions in shaping the circumstellar environments of massive stars and their subsequent explosive deaths.
- The use of machine learning and data-driven approaches to classify and analyze transient events in large-scale surveys.
- The source of FRB dispersion measures and their use in cosmological inference.
X-Ray Astrophysics
As an undergraduate (and externally as a graduate student), I have been a member of the X-Ray Astrophysics Group at the University of Utah, working under Dr. Daniel Wik. The group focuses on the X-ray emission of galaxy clusters and active galactic nuclei (AGN), and how these observations can be used to constrain various astrophysical processes. As part of my work in the group, I have
- worked with the EROSITA all-sky survey team to identify anomalous hard-band X-ray sources.
- Contributed to work on the cross-calibration of X-ray observatories, including Chandra, XMM-Newton, NuSTAR, and XRISM. My work explores the use of deep-learning and simulation-based (likelihood-free) inference to identify calibration systematics between these observatories.
- Worked on our understanding / interpretation of results from XRISM’s RESOLVE instrument, a high-resolution X-ray microcalorimeter. This instrument’s small field of view and high spectral resolution make it ideal for probing the microphysics of the intracluster medium, particularly in the context of turbulence; however, its small field of view also makes it challenging to interpret. I have worked on theoretical models of XRISM observations of galaxy clusters to help inform observing strategies and data analysis.
Data Science
My work in epidemiology has focused on modeling the dynamics of rare diseases and understanding the intersection between infectious diseases and autoimmune conditions. I leverage advanced statistical analysis, machine learning, and big data techniques to uncover insights from large-scale patient datasets.
As the lead data scientist in the Weller Lab at the University of Utah School of Dentistry, I managed patient datasets that were 10 to 100 times larger than those typically seen in the literature. This positioned our work at the forefront of rare disease research, enhancing both the quality and statistical rigor of our findings. The recent emergence of massive-scale electronic health record (EHR) datasets has provided a novel tool in precision epidemiology research which we have harnessed to understand the dynamics of even extremely rare disease phenotypes.
My role involved not only technical development but also cross-disciplinary collaboration. I have applied my computational skills to open new avenues of research within the lab, bridging gaps between disciplines and pushing the boundaries of what’s possible in understanding autoimmune disease mechanisms. This has led to impactful research that has been presented at both national and international conferences.
Publications
Over the past few years, I’ve worked on projects spanning computational astrophysics, biomedical data science, and inclusive pedagogy. Below is a selection of my publications, including peer-reviewed journal articles, collaborative research, and conference abstracts.
I might be a little bit slow to update this page directly, so for a fully up-to-date list of my publications, please check the google scholar profile linked below.
For a full list, see my Google Scholar profile →
Hormonal transitions across the lifespan shape susceptibility to Sjogren’s disease
Published in Rheumatology, 2026
Using electronic health records from over 100,000 patients with Sjogren’s disease and 1.33 million controls, we show that age-dependent hormonal transitions across the lifespan correspond with shifting sex bias in disease susceptibility…
Recommended citation: Diggins, E. C., & Weller, M. L. (2026). Hormonal transitions across the lifespan shape susceptibility to Sjogren's disease. Rheumatology, 65(3), keag087. https://academic.oup.com/rheumatology/article/doi/10.1093/rheumatology/keag087/8489784
PyMetric: A Geometry Informed Array Mathematics Package
Published in Journal of Open Source Software, 2026
PyMetric is a lightweight Python library that streamlines differential geometry and vector calculus operations in user-defined coordinate systems, with a focus on applications in astrophysics and computational physics…
Recommended citation: Diggins, E. C., & Wik, D. R. (2026). PyMetric: A Geometry Informed Array Mathematics Package. Journal of Open Source Software, 11(117), 8901. https://joss.theoj.org/papers/10.21105/joss.08901.pdf
Galaxy Cluster Constraints on Extensions of Modified Gravity
Published in The Astrophysical Journal, 2025
In this work, we investigate the viability of EMOND and MOND + DM in the context of galaxy clusters using both observational and theoretical constraints…
Recommended citation: Diggins, E. C., & Wik, D. R. (2025). Galaxy Cluster Constraints on Extensions of Modified Gravity. The Astrophysical Journal, 989(1), 17. https://iopscience.iop.org/article/10.3847/1538-4357/adea3f/pdf
Constraining Modified Gravity Using Galaxy Cluster Dynamics
Published in University of Utah Marriott Library, 2024
In this work, two branches of modified dynamics - EMOND and MOND plus Dark Matter (MOND+DM) - are challenged using observational and theoretical constraints which emerge from galaxy clusters.
Recommended citation: Diggins, Eliza C. (2024). "Constraining Modified Gravity Using Galaxy Cluster Dynamics." Retrieved from eliza-diggins.github.io http://eliza-diggins.github.io/files/Honors_Thesis.pdf
