Disk stability of the Milky Way near the sun

被引：10
|
作者：
Luo, XL [1 ]
Peng, QH
机构：
[1] Nanjing Univ, Dept Astron, Nanjing 210093, Peoples R China
[2] Beijing Univ, Joint Beijing Astrophys Ctr, Chinese Acad Sci, Beijing 100871, Peoples R China
来源：
CHINESE PHYSICS LETTERS | 1999年 / 16卷 / 12期
关键词：
D O I：
10.1088/0256-307X/16/12/026
中图分类号：
O4 [物理学];
学科分类号：
0702 ;
摘要：
By solving Poisson's equation for logarithmic density disturbance in three-dimensional (3D) spiral galaxies, the disturbed potential can be given on the disk. Combining it with the corresponding dispersion relation, the local gravitational stability of our galaxy is discussed here. We have generalized the Toomre's stability criterion to the more realistic 3D galaxy models. The generalized Toomre's parameter Q near the sun is 2.08 or 2.20 for two or four armed spiral galaxy models, respectively.
引用
收藏
页码：931 / 933
页数：3
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