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Title:
How far do bars extend
Authors:
Contopoulos, G.
Affiliation:
AA(Maryland, University, College Park, Md.; European Southern Observatory, Geneva, Switzerland)
Publication:
Astronomy and Astrophysics, vol. 81, no. 1-2, Jan. 1980, p. 198-209. (A&A Homepage)
Publication Date:
01/1980
Category:
Astronomy
Origin:
STI
NASA/STI Keywords:
BARS, GALACTIC STRUCTURE, PERTURBATION THEORY, RESONANCE, ASTRONOMICAL MODELS, CELESTIAL MECHANICS, ORBITAL MECHANICS
Comment:
A&AA ID. AAA027.151.008
Bibliographic Code:
1980A&A....81..198C

Abstract

The response of various types of galaxies to barred perturbations is studied, with emphasis on the regions near the Inner Lindblad Resonance(s) and the particle resonance (corotation). If there is only one ILR a bar in general starts at the ILT and ends at corotation. If there are two ILR's a bar can exist between the center and the inner ILR, and/or between the outer ILR and corotation. The inner bar can extend up to the outer ILR if its amplitude drops sufficiently fast. If there is no ILR, or if the two ILR's are very close to each other the bar can extend all the way from the center up to corotation.

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