DETERMINATION OF TRANSVERSE DENSITY STRUCTURING FROM PROPAGATING MAGNETOHYDRODYNAMIC WAVES IN THE SOLAR ATMOSPHERE
DETERMINATION OF TRANSVERSE DENSITY STRUCTURING FROM PROPAGATING MAGNETOHYDRODYNAMIC WAVES IN THE SOLAR ATMOSPHERE
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DOI：
10.1088/2041-8205/769/2/l34
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发表时间：
2013-04
期刊：
影响因子：
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通讯作者：
I. Arregui;A. Asensio Ramos;D. Pascoe
中科院分区：
文献类型：
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作者：
I. Arregui;A. Asensio Ramos;D. Pascoe
我们提出了一个贝叶斯地震反演技术的传播磁流体动力学横波观测日冕波导。该技术使用的理论预测的空间阻尼传播扭结波在横向不均匀的冠状波导。它结合波振幅阻尼长度尺度沿着波导谐振阻尼传播扭结波的理论结果来推断整个振荡结构的等离子体密度变化。只要测量沿沿着传播方向的速度振幅的空间依赖性，并确定存在两种不同的阻尼制度，该技术将使我们能够充分约束横向密度结构，提供密度对比度和其横向不均匀性长度尺度的估计。
We present a Bayesian seismology inversion technique for propagating magnetohydrodynamic transverse waves observed in coronal waveguides. The technique uses theoretical predictions for the spatial damping of propagating kink waves in transversely inhomogeneous coronal waveguides. It combines wave amplitude damping length scales along the waveguide with theoretical results for resonantly damped propagating kink waves to infer the plasma density variation across the oscillating structures. Provided that the spatial dependence of the velocity amplitude along the propagation direction is measured and the existence of two different damping regimes is identified, the technique would enable us to fully constrain the transverse density structuring, providing estimates for the density contrast and its transverse inhomogeneity length scale.