The effect of anisotropy on the propagation of linear compressional waves in magnetic flux tubes: Applications to astrophysical plasmas
The effect of anisotropy on the propagation of linear compressional waves in magnetic flux tubes: Applications to astrophysical plasmas
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各向异性对磁通量管中线性压缩波传播的影响：在天体物理等离子体中的应用
DOI：
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发表时间：
2004
期刊：
影响因子：
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通讯作者：
A. Marcu
中科院分区：
文献类型：
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作者：
I. Ballai;A. Marcu
研究了线性纵波在磁通管中的传播。管内和管外的等离子体被认为是稀薄的，这赋予了等离子体各向异性的特性。在相对于环境磁场的平行和垂直方向上，各向异性在不同的温度下出现。应用理论结果研究了各向异性和平衡定常流动对日冕羽流、地磁尾部和各向异性天体物理喷流等结构中波传播的影响。结果表明，内部和外部各向异性对线性纵波的传播有很重要的影响。在某些应用中，稳定平衡流的存在会极大地改变模式的传播。
The propagation of linear compressional waves is studied in magnetic flux tubes. The plasma inside and outside the tube is considered to be rarefied which confers an anisotropic character to the plasma. The anisotropy appears at different temperatures for parallel and perpendicular directions relative to the ambient magnetic field. The theoretical results are applied to study the effects of anisotropy and equilibrium steady flow on wave propagation in structures such as coronal plumes, the geomagnetic tail and anisotropic astrophysical jets. The obtained results show that the internal and/or external anisotropy has a very important effect on the propagation of linear compressional waves. The presence of a steady equilibrium flow in certain applications can change dramatically the propagation of the modes.