STATISTIC STUDY ON ASYMMETRIC PROPAGATION OF FLARE-ASSOCIATED INTERPLANETARY SHOCK WAVES
STATISTIC STUDY ON ASYMMETRIC PROPAGATION OF FLARE-ASSOCIATED INTERPLANETARY SHOCK WAVES
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发表时间：
1988
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通讯作者：
F. Wei
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作者：
F. Wei
在综合研究太阳耀斑的地球物理效应（地磁扰动和宇宙线的Forbush衰减）、多航天器太阳风观测和行星际闪烁（IPS）观测的基础上，进一步加深了对耀斑激波在行星际空间传播的认识。主要结果是：耀斑激波通常是相对于耀斑法线的非对称传播，在赤道上最快传播速度的方向偏向行星际螺旋磁场，在纬度上接近日球，电流片，动力学参数（V，P，N，T，β等）和.冲击波能量E，在耀斑冲击波的东南方向高于西北方向，相反，磁场在东南方向弱于西北方向。在此基础上，我们提出了一个三维非对称耀斑激波传播模型。该模型与近年来通过分析大量航天器观测数据所得到的统计研究结果是一致的，并能自然地解释地磁效应随母耀斑位置的不对称分布。本文的研究结果有助于激波传播理论的发展和日地扰动事件的预报。
On the basis of the comprehensive studies of solar flare-associated geophysical effects (geomagnetic disturbances and the Forbush decreases of cosmic rays), multi-spacecraft observations of solar wind and interplanetary scintillation (IPS) observations, we have furthered our knowledge of the flare-shock wave propagation in the interplanetary space. The main results are that the flare-shock wave is usually an asymmetric propagation related to the flare normal, the direction of the fastest propagation velocity in longitudes tends to deflect towards the interplanetary spiral magnetic field and that in latitudes approaches heliospheric, current sheet, the dynamic parameters (V, P, N, T, β, etc.) and the. shock wave energy. E, are higher in the southeast than in the northwest of the flare shock wave, and conversely, the magnetic field is weaker in the southeast than in the northwest. Based on the results, we proposed a 3-dimensional asymmetrical model of flare-shock wave propagationst. This model is consistent with recent statistical studies obtained by analysing a great deal of spacecraft observation data, and may naturally explain the asymmetric distribution of geomagnetical effects in company with the parent flare positions. The results of this paper could help develop the propagation theory of shock waves and the prediction of the solar-terrestrial disturbance events.