Dissipative collapse of a magnetic flux rope with a force-free internal field

被引：0
|
作者：
A. A. Solov’ev
机构：
[1] Russian Academy of Sciences,Central (Pulkovo) Astronomical Observatory
来源：
Astronomy Reports | 2011年 / 55卷
关键词：
Astronomy Report; Transverse Cross Section; Magnetic Element; Magnetic Sphere; Magnetic Flux Rope;
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学科分类号：
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 α = 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: αa ≫ 1.
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页码：1025 / 1037
页数：12
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