文章基本信息

标题：Unstable spiral modes in disk-shaped galaxies: Enhancement of growth rate
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作者：Y. Y. Lau ; James W.-K. Mark
期刊名称：Proceedings of the National Academy of Sciences
印刷版ISSN：0027-8424
电子版ISSN：1091-6490
出版年度：1976
卷号：73
期号：11
页码：3785-3787
DOI：10.1073/pnas.73.11.3785
语种：English
出版社：The National Academy of Sciences of the United States of America
摘要：An additional effect not considered in our earlier papers is found to enhance the rate of growth of spiral modes in disk-shaped galaxies. This enhanced growth appears to be attributable to the combined influence of differential rotation and tangential forces. For certain galaxy models, rapid temporal growths are possible (comparable to those found in numerical experiments), but in many real galaxies, these tendencies to extreme growth rates are probably reduced to lower levels by competing effects such as wave absorption at inner Lindblad resonance.
关键词：density waves ; galactic dynamics ; spiral arms