Thesis Defense |
Events During the Week of April 26th through May 3rd, 2026
Monday, April 27th, 2026
- No events scheduled
Tuesday, April 28th, 2026
- No events scheduled
Wednesday, April 29th, 2026
- No events scheduled
Thursday, April 30th, 2026
- No events scheduled
Friday, May 1st, 2026
- Taking Inventory of the Most Promising Lensed Radio Sources for Constraining Fundamental Properties of Dark Matter
- Time: 12:00 pm - 2:00 pm
- Place: 5280 Chamberlin or
- Speaker: Michael Martinez, Physics PhD Graduate Student
- Abstract: While Dark Matter (DM) makes up roughly 80% of the total matter in the Universe, its microscopic properties remain one of the biggest questions in Cosmology today. Fortunately, those properties dictate the distribution and form of macro-scale gravitational structures in the universe, allowing for indirect studies which can distinguish between competing particle models. One such avenue for this research is via strong gravitational lensing systems, where dark halos in the lens substructure and along the line of sight perturb image positions and flux. However, the current population of sources suitable for this analysis is limited, especially at radio wavelengths where astrometric perturbations are observable. I will first discuss which properties of lens systems make them especially useful for DM constraints and examine the minimum amount of information necessary for such an experiment. Then, I present the results of two successful searches for new radio lenses in existing radio and optical surveys, utilizing a new method to expand the potential follow-up population for Dark Matter studies in the future. I conclude with a discussion of the completeness of this population.
- Host: Keith Bechtol