The Milky Way as a Key to Structural Evolution in Galaxies

Details The Milky Way as a Key to Structural Evolution in Galaxies The Milky Way as a Key to Structural Evolution in Galaxies

2001-01-16

arxiv.org/abs/astro-ph/0101255v1

Astronomy and Astrophysics

Astrophysics

20 pages, 13 figures, to appear in proceedings of 4th Tetons Summer Conference on Galactic Structure, Stars, and the Interstel

Scientific paper

Much of our effort in understanding the long-term evolution and morphology of the Milky Way and other galaxies has focused on the equilibrium of its luminous disk. However, the interplay between all components, seen and unseen, is a major cause of observed features and drives evolution. I will review the key underlying dynamics, and in a number of examples, show how this leads to lopsidedness and offset nuclei, may trigger bars and cause warps. Indeed, the Milky Way like most spiral galaxies show exhibit many of these features. In addition, the mechanisms suggest that observed morphology depends on the properties of the galaxy and only weakly on any particular disturbance. Because of this convergence, understanding a galaxy's history will be subtle and require the level of detail that study of the Milky Way can provide.

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