Physics Spring Colloquium- The outer profiles of dark matter halos as a probe of Cosmology, dark matter and galaxy evolution

Abstract: The distribution of matter in a dark matter halo contains information about the history of its growth. In this talk I will discuss the recent theoretical developments on how the overall matter distribution and a feature in the outskirts called the splashback radius can be used to test the nature of gravity and dark matter models. I will also talk about the recent observational developments in measuring the distribution of galaxies and matter around the splashback radius in massive galaxy clusters in DES, SPT and ACT and what we learn about the evolution of galaxies from it.
 
** Refreshments served from 2:45pm – 3:00pm in PAS 218.  Thank you. **