The origin of rR1 ring structures in barred galaxies

被引：116

作者：

Romero-Gomez, M.

Masdemont, J. J.

Athanassoula, E.

Garcia-Gomez, C.

机构：

[1] Univ Rovira & Virgili, DEIM, Tarragona 43007, Spain

[2] Univ Politecn Cataluna, IEEC, E-08028 Barcelona, Spain

[3] Univ Politecn Cataluna, Dept Mat Aplicada 1, E-08028 Barcelona, Spain

[4] Astron Observ Marseille Provence, LAM, F-13248 Marseille 04, France

来源：

ASTRONOMY & ASTROPHYSICS | 2006年 / 453卷 / 01期

关键词：

galaxies; structure;

D O I：

10.1051/0004-6361:20054653

中图分类号：

P1 [天文学];

学科分类号：

0704 ;

摘要：

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 agree with the observed properties of rR(1) structures.

引用

页码：39 / 45

页数：7

共 39 条

[1]

ATHANASSOULA E, 1982, ASTRON ASTROPHYS, V107, P101

[2] What determines the strength and the slowdown rate of bars? [J].