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Gas and Star Dynamics of Galaxies

Published online by Cambridge University Press:  03 August 2017

G. Contopoulos
G. Contopoulos*
Affiliation:
Astronomy Department, University of Athens Athens, GREECE and Astronomy Department, University of Florida Gainesville, Fl. USA

Abstract

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A review of recent developments in three problems is made. (1) Galaxy formation. Quite different patterns are found if the galaxy is mainly gaseous or mainly stellar. In the first case the motions are highly organized, while in the second case they are mostly irregular. (2) Barred galaxies. One can construct roughly self-consistent stellar models for the bar and for the outer spiral, beyond the −4/1 resonance. The stellar orbits near corotation are stochastic, but gas can join smoothly the bar with the outer stellar spiral. (3) Normal Spirals. We found that strong and open spirals (Sb, Sc) terminate near the 4/1 resonance, while weak tight spirals (Sa) can extend all the way to corotation.

Type
X- Gas and Star Dynamics (Models and Simulations)
Information
Symposium - International Astronomical Union , Volume 146: Dynamics of Galaxies and their Molecular Cloud Distributions , 1991 , pp. 335 - 342
Copyright
Copyright © Kluwer 1991 

References

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