Spiral galaxies as gravitational plasmas

被引：17
作者：
Griv, E. [1 ]
Gedalin, M.
Yuan, C.
机构：
[1] Ben Gurion Univ Negev, Dept Phys, IL-84105 Beer Sheva, Israel
[2] Acad Sinica, Inst Astron & Astrophys, Taipei 106, Taiwan
来源：
DYNAMICAL PROCESSES IN CRITICAL REGIONS OF THE HELIOSPHERE | 2006年 / 38卷 / 01期
基金：
以色列科学基金会;
关键词：
galaxies : kinematics and dynamics; galaxies : structure; galaxies : spiral galaxies; waves and instabilities;
D O I：
10.1016/j.asr.2006.05.019
中图分类号：
V [航空、航天];
学科分类号：
08 ; 0825 ;
摘要：
This article reviews recent studies of dynamics of disk-shaped galaxies with special emphasis on their spiral structures. In a local version of kinetic stability theory, the very existence and the value of the critical wavelength of the spiral structure arising due to nonresonant Jeans-type instability of gravity perturbations is explained. A formal analogy between the collective oscillations in a rotating self-gravitating disk and the oscillations of a hot nonneutral plasma in a magnetic field is explored. (c) 2006 Published by Elsevier Ltd on behalf of COSPAR.
引用
收藏
页码：47 / 56
页数：10
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