Magnetic reconnection in large-scale cosmic plasmas

被引：2
|
作者：
Makishima, K [1 ]
机构：
[1] Univ Tokyo, Dept Phys, Bunkyo Ku, Tokyo 1130033, Japan
来源：
EARTH PLANETS AND SPACE | 2001年 / 53卷 / 06期
关键词：
D O I：
10.1186/BF03353288
中图分类号：
P [天文学、地球科学];
学科分类号：
07 ;
摘要：
X-ray emitting hot plasmas of a temperature 2-12 keV, associated with galaxy clusters, constitute the most dominant form of baryons in the universe. The plasma is thought to be magnetized at least to 0.1-1 nT, although the beta value is relatively high at 10-100. The plasma is confined by gravity of each cluster in a stable manner, but the member galaxies are moving through it with an approximately transonic speed. Therefore, the plasma must be in a magnetohydrodynamically turbulent condition, where frequent magnetic reconnection is expected to take place. Mainly based on observations with the ASCA X-ray Observatory, evidence for such magnetic reconnection is accumulating.
引用
收藏
页码：677 / 681
页数：5
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