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Speaker Talk Date Talk Series
Kathryn Johnston (Columbia University) 9 March 2017 The Eddington Lectures



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.



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