Coronal Mass Ejections Observed at the Total Solar Eclipse on 13 November 2012
Coronal Mass Ejections Observed at the Total Solar Eclipse on 13 November 2012
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DOI：
10.1007/s11207-014-0476-z
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发表时间：
2013-09
期刊：
影响因子：
2.8
通讯作者：
Y. Hanaoka;Jun Nakazawa;Osamu Ohgoe;Y. Sakai;K. Shiota
中科院分区：
文献类型：
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作者：
Y. Hanaoka;Jun Nakazawa;Osamu Ohgoe;Y. Sakai;K. Shiota
2012年11月13日的日全食在两个地点进行了白光观测，日全食发生的时间间隔为35分钟。观测到的日冕结构从太阳翼缘到太阳半径范围内，具有宽动态范围和高信噪比。在1 ~ 2r⊙高度范围内观测到持续的日冕物质抛射（CME）和日冕物质抛射前环结构。日冕物质抛射的来源区域在这个高度范围内，在此高度范围内，日冕物质抛射的物质和磁场在喷发前就已经存在。这个高度范围包括极紫外观测到的低日冕和星载白光观测到的高日冕之间的差距，但日食观测表明，这个高度范围对于研究日冕抛射起始是必不可少的。日食观测基本上只是CME的一个快照，但它表明了未来在这个高度范围内持续覆盖CME观测的重要性。
White-light observations of the total solar eclipse on 13 November 2012 were made at two sites, where the totality occurred 35 min apart. The structure of the corona from the solar limb to a couple of solar radii was observed with a wide dynamic range and a high signal-to-noise ratio. An ongoing coronal mass ejection (CME) and a pre-CME loop structure just before the eruption were observed in the height range between 1 – 2 R⊙. The source region of CMEs was revealed to be in this height range, where the material and the magnetic field of CMEs were located before the eruption. This height range includes the gap between the extreme ultraviolet observations of the low corona and the spaceborne white-light observations of the high corona, but the eclipse observation shows that this height range is essential for the study of CME initiation. The eclipse observation is basically just a snapshot of CMEs, but it indicates the importance of a continuous coverage of CME observations in this height range in the future.