Dynamics of the Milky Way
Dynamics of the Milky Way
This work presents a study of methods useful for modeling and understanding dynamical systems in the Galaxy. A natural coordinate system for the study of dynamical systems is the angle-action coordinate system. Newmethods fortheapproximationof the action-angle variablesingeneral potentials are presented and discussed. These new tools are applied to the construction of dynamical models for two of the Galaxys components: tidal streams and the Galactic disc. Tidal streams are remnants of tidally stripped satellites in the Milky Waythatexperiencethe effectsofthe large scale structureof the Galactic gravitational potential, while the Galactic disc provides insights into the nature of the Galaxy near the Sun. Appropriate action-based models are presented and discussed for these components, and extended to include further information such as the metallicity of stars.
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