Are “EIT Waves” Fast-Mode MHD Waves?
Are “EIT Waves” Fast-Mode MHD Waves?
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DOI：
10.1086/519013
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发表时间：
2007-04
期刊：
影响因子：
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通讯作者：
M. Wills-Davey;Craig E. DeForest;J. O. Stenflo;J. O. Stenflo
中科院分区：
文献类型：
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作者：
M. Wills-Davey;Craig E. DeForest;J. O. Stenflo;J. O. Stenflo
我们研究了大尺度、日冕、传播波阵面（“EIT波”）的性质，发现它们与使用快模MHD平面波理论的解决方案不协调。具体来说，我们考虑了以下性质：非色散的单脉冲表现，观测到的速度低于局部alfv<s:1>速度，以及以任意数量的恒定速度行进的不同脉冲，而不是以“预测的”快模速度行进。我们讨论了对这些现象的类孤子解释的可能性，并说明了它如何与上述方面相一致。
We examine the nature of large-scale, coronal, propagating wave fronts ("EIT waves") and find they are incongruous with solutions using fast-mode MHD plane-wave theory. Specifically, we consider the following properties: nondispersive single pulse manifestations, observed velocities below the local Alfvén speed, and different pulses which travel at any number of constant velocities, rather than at the "predicted" fast-mode speed. We discuss the possibility of a soliton-like explanation for these phenomena, and show how it is consistent with the above-mentioned aspects.