Dissipative Collapse of a Magnetic Flux Rope with a Force-Free Internal Field

被引：6
|
作者：
Solov'ev, A. A. [1 ]
机构：
[1] Russian Acad Sci, Cent Pulkovo Astron Observ, St Petersburg 196140, Russia
来源：
ASTRONOMY REPORTS | 2011年 / 55卷 / 11期
关键词：
SOLAR ACTIVE REGIONS;
D O I：
10.1134/S1063772911110096
中图分类号：
P1 [天文学];
学科分类号：
0704 ;
摘要：
We have obtained new exact solutions describing the self-similar, uniform compression of twisted magnetic flux tubes (a magnetic flux rope) with a linear, force-free internal field with alpha = const in a resistive medium during the course of their dissipative evolution. Formally, the radius of the rope a decreases to zero over a finite time. This time turns out to be relatively short (several hours) for a rope with a radius of several hundred kilometers, if the helicity of the magnetic field in the rope is high: alpha alpha >> 1.
引用
收藏
页码：1025 / 1037
页数：13
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