Cooperation of orbital streams in disc galaxies

被引：19

作者：

Earn, DJD ^{[1
]}

LyndenBell, D ^{[1
]}

机构：

[1] HEBREW UNIV JERUSALEM, RACAH INST PHYS, IL-91904 JERUSALEM, ISRAEL

来源：

MONTHLY NOTICES OF THE ROYAL ASTRONOMICAL SOCIETY | 1996年 / 278卷 / 02期

关键词：

instabilities; celestial mechanics; stellar dynamics; galaxies; kinematics and dynamics; structure;

D O I：

10.1093/mnras/278.2.395

中图分类号：

P1 [天文学];

学科分类号：

0704 ;

摘要：

An orbit is said to cooperate with a potential well if it tends to deepen it by aligning with it. We derive analytical formulae that give the response of resonant orbits to nonaxisymmetric perturbations. This makes it possible to quantify the level of cooperation in a given galaxy model. The qualitative response of orbits can be characterized by the sign of what we call the cooperation parameter. We discuss the relevance of our results for theories of the formation and maintenance of bars and lopsidedness.

引用

页码：395 / 405

页数：11