Properties of the stellar velocity ellipsoid and stability in disks of spiral galaxies

被引：2
|
作者：
van der Kruit, PC [1 ]
机构：
[1] Univ Groningen, Kapteyn Astron Inst, NL-9700 AV Groningen, Netherlands
来源：
ASTROPHYSICS AND SPACE SCIENCE | 1999年 / 269卷 / 0期
关键词：
D O I：
10.1023/A:1017036428011
中图分类号：
P1 [天文学];
学科分类号：
0704 ;
摘要：
Disks of spiral galaxies are characterized by effectively exponential brightness and presumably density distributions in both the radial and vertical directions. It is to be expected that the ratio between the scalelength and -height bears a relation to the axis ratio of the stellar velocity ellipsiod. Hydrostatic equilibrium connects the vertical velocity dispersion to the scaleheight. In the radial direction the velocity dispersion relates to the scalelength through conditions of local stability. Preliminary applications are presented.
引用
收藏
页码：139 / 146
页数：8
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