Plasma Heating by Alfvén Wave Filamentation: A Relevant Mechanism in the Solar Corona and the Interstellar Medium
Plasma Heating by Alfvén Wave Filamentation: A Relevant Mechanism in the Solar Corona and the Interstellar Medium
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阿尔文波丝加热等离子体：日冕和星际介质中的相关机制
DOI：
10.1086/304504
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发表时间：
1997
期刊：
影响因子：
--
通讯作者：
P. Sulem
中科院分区：
文献类型：
--
作者：
S. Champeaux;A. Gazol;T. Passot;P. Sulem
提出了一种由弱非线性、圆极化Alfvén波的横向崩塌(成丝)引起的磁控均匀空间等离子体中小尺度产生的机制。有人认为，频率超过约10赫兹的波可以显著地促进开放冕洞的加热和快速太阳风的加速。在日冕环路中，这个频率下限减少到1赫兹。在星际介质的温电离阶段，Alfvén波成丝的重要性也得到了证明。
A mechanism for small-scale generation in magnetically dominated, homogeneous space plasmas is proposed, resulting from transverse collapse (filamentation) of weakly nonlinear, circularly polarized Alfvén waves. It is argued that waves whose frequencies exceed a magnitude of about 10 Hz can significantly contribute to the heating of open coronal holes and to the acceleration of the fast solar wind. In coronal loops, this frequency lower bound reduces to 1 Hz. The importance of Alfvén wave filamentation is also demonstrated in the warm ionized phase of the interstellar medium.