학술논문
Discrete spiral modes in disk galaxies: Some numerical examples based on density wave theory
Document Type
Article
Author
Source
Proceedings of the National Academy of Sciences of the United States of America; November 1977, Vol. 74 Issue: 11 p4726-4729, 4p
Subject
Language
ISSN
00278424; 10916490
Abstract
Discrete growing spiral modes are calculated, on the basis of principles of stellar dynamics, according to the recently developed asymptotic theory of density waves for spiral structure in galaxies. From the growth rates obtained, it appears likely that several spiral modes coexist in a given disk galaxy. General properties of these modes are described for two galaxy models, and some of their important observational implications are discussed.