TAP Colloquium: Physical Manifestations of Evolution, Regularity and Chaos In and Around Our Galaxy

Kathryn Johnston, Columbia University
Monday, February 19, 2018 - 4:00pm
Kuiper Space Sciences Bldg., Room 312

Our Galaxy is thought to be dynamically young with a fairly smooth potential dominated
by a nearly spherical dark matter halo that has evolved little in the last several billion years.
These attributes broadly suggest that potential evolution and dynamical chaos should have
negligible influences on the orbits of its constituent stars, as well as on the stellar structures
they collectively support. This talk reviews some recent results which point to signatures of
Galactic evolution and the chaotic nature of stellar orbits that can be (and have been) observed.