Yale Astronomy & Astrophysics Colloquium - Nora Shipp

Event time: 
Thursday, October 24, 2024 - 2:30pm
Speaker: 
Nora Shipp
Speaker Institution: 
University of Washington
Talk Title: 
Near-field Cosmology with Stellar Streams
Event description: 

Stellar streams, the tidally-disrupted remnants of globular clusters and dwarf galaxies orbiting throughout the Milky Way’s halo, are some of the most powerful tools in the study of near-field cosmology. In particular, they are sensitive probes of the distribution and properties of dark matter across multiple scales, from the smallest subhalos, to the entire dark matter halo, as well as being excellent tracers of the growth and structure of our Galaxy. Thanks to recent large photometric, astrometric, and spectroscopic surveys, the population of stellar streams around the Milky Way is finally being revealed. In this talk, I will present the discovery, characterization, and modeling of the Milky Way stellar streams. I will also present the first comparative studies of stream populations in observations and cosmological simulations, which revealed inconsistencies in orbital parameters and disruption rates, as well as a wealth of potentially yet to be detected stellar streams. In addition, I will present plans to use upcoming surveys like the Rubin Observatory LSST in order to discover and analyze tidal structures throughout the Milky Way and across the local Universe. These data will further revolutionize the study of near-field cosmology, and reveal the answers to critical questions about the structure and assembly of our Galaxy and the nature of dark matter.

Location: 
Kline Tower, Room 205 See map
219 Prospect Street
New Haven, CT 06511