On the origin of rR_1 ring structures in barred galaxies
Astrophysics
2009-11-11 v1
Abstract
We propose a new theory for the formation of rR_1 ring structures, i.e. for ring structures with both an inner and an outer ring, the latter having the form of ``8''. We propose that these rings are formed by material from the stable and unstable invariant manifolds associated with the Lyapunov orbits around the equilibrium points of a barred galaxy. We discuss the shape and velocity structure of the rings thus formed and argue that they are in agreement with the observed properties of rR_1 structures.
Cite
@article{arxiv.astro-ph/0603124,
title = {On the origin of rR_1 ring structures in barred galaxies},
author = {M. Romero-Gomez and J. J. Masdemont and E. Athanassoula and C. Garcia-Gomez},
journal= {arXiv preprint arXiv:astro-ph/0603124},
year = {2009}
}
Comments
8 pages, 9 figures, accepted in Astronomy and Astrophysics. High quality figures are available upon request