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Physics & Astronomy Colloquium - Professor Nitya Kallivayalil, Univ. of Virginia

Title: "Local Group Cosmology: lessons from mapping the stellar populations of the nearby universe"

4/18/2025
2:15 pm – 3:15 pm
Wilder 104 and Zoom
Intended Audience(s): Public
Categories: Arts and Sciences, Lectures & Seminars

Abstract: I will present results from the JWST Stellar Populations Early Release Science Program, and two HST Treasury programs that provide deep imaging, below the oldest main-sequence turn-off, for the majority of the presently known Milky Way and M31 dwarf galaxies. The data allow us to measure proper motions and hence construct orbital histories, measure morphologies (sizes and light profiles), and obtain star formation histories for these dwarfs, thereby addressing critical issues related to galaxy formation, cosmic reionization, and the nature of dark matter. I will focus on tests of the self-similarity of the universe, tests of dark matter arising from stellar distributions in the faintest galaxies, and whether our Milky Way and its satellite system is representative of similar mass galaxies in the nearby Universe.

Hosted by Professor Burcin Mutlu-Pakdil

Please click the link below to join the webinar:

Email Physics.Department@dartmouth.edu for passcode.

For more information, contact:
Tressena Manning
tressena.a.manning@dartmouth.edu
603-646-2854
Permanent URL to this event: https://writing.dartmouth.edu/events/event?event=77338

Events are free and open to the public unless otherwise noted.