Reflection and trapping of Alfven waves in a spherically symmetric stellar atmosphere
Reflection and trapping of Alfven waves in a spherically symmetric stellar atmosphere
复制标题
球对称恒星大气中阿尔文波的反射和捕获
DOI：
10.1086/168384
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发表时间：
1990
期刊：
影响因子：
--
通讯作者：
Z. Musielak
中科院分区：
文献类型：
--
作者：
C. An;S. Suess;R. Moore;Z. Musielak
用含时MHD数值模型分析了球对称等温层状恒星大气中Alfven波的传播。特别考虑了波的反射和由于大气中阿尔芬速度的峰值而引起的波的捕获。研究了陷波区域的共振频率以及陷波对Alfven波压力和传播的影响。数据显示，阿尔芬波捕获器在加速来自冷恒星的风方面具有潜在的重要作用。
Alfven wave propagation in a spherically symmetric isothermal and stratified stellar atmosphere are analzyed using a time-dependent MHD numerical model. Particular consideration is given to wave reflection and the resultant trapping of the wave due to a peak in the Alfven speed in the atmosphere. Resonance frequencies in the trapping region and the effect of trapping on Alfven wave pressure force and propagation are examined. The data reveal that Alfven wave trapping has a potentially important role in accelerating winds from cool stars.