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Nonlinear spiral waves in a galactic disk

被引：0
|
作者：
Alekseev, P. S. [1 ]
Danilenko, A. A. [1 ]
机构：
[1] Russian Acad Sci, AF Ioffe Physicotech Inst, St Petersburg 194021, Russia
来源：
JETP LETTERS | 2009年 / 89卷 / 05期
基金：
俄罗斯基础研究基金会;
关键词：
GALAXIES; MATTER; SCALE;
D O I：
10.1134/S0021364009050014
中图分类号：
O4 [物理学];
学科分类号：
0702 ;
摘要：
An analytical solution of the nonlinear dynamic equations for a galactic disk is found. This solution describes the spiral design of spiral galaxies. The logarithmic profile of the spiral design and relatively larger density fluctuations as compared to velocity-field fluctuations are explained. Breaking of the obtained solution takes place for a certain critical amplitude. This can be a mechanism for the formation of galactic shocks and narrow star formation regions.
引用
收藏
页码：219 / 223
页数：5
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