2006年12月13日一个快速旋转的太阳黑子和作为主要太阳事件起源的短暂区域之间的相互作用
Interaction between a fast rotating sunspot and ephemeral regions as the origin of the major solar event on 2006 December 13
摘要：
2006年12月13日的主要太阳事件的特征是几乎同时发生的一堆热喷出物，一个巨大的双带耀斑和一个扩展的地球定向日冕物质抛射。我们研究了活动区NOAA AR 10930的磁场和太阳黑子的演化，这是事件的源区，而它从12月10日到12月13日经过太阳盘中心。我们发现，与这次事件有关的活动区的明显变化是磁剪切的发展，短暂区的出现和一个较小的太阳黑子的快速旋转。在活动区的磁中性线附近，快速旋转的黑子与短暂区之间的相互作用触发了持续增亮，最终导致大耀斑。这表明，只有在太阳黑子旋转到200 $^{\circ}$之后，才会发生重大事件。太阳黑子围绕其中心旋转至少240 $^{\circ}$，这是已报道的最大太阳黑子旋转角。
英文摘要：
The major solar event on 2006 December 13 is characterized by the approximately simultaneous occurrence of a heap of hot ejecta, a great two-ribbon flare and an extended Earth-directed coronal mass ejection. We examine the magnetic field and sunspot evolution in active region NOAA AR 10930, the source region of the event, while it transited the solar disk centre from Dec. 10 to Dec. 13. We find that the obvious changes in the active region associated with the event are the development of magnetic shear, the appearance of ephemeral regions and fast rotation of a smaller sunspot. Around the area of the magnetic neutral line of the active region, interaction between the fast rotating sunspot and the ephemeral regions triggers continual brightening and finally the major flare. It is indicative that only after the sunspot rotates up to 200$^{\circ}$ does the major event take place. The sunspot rotates at least 240$^{\circ}$ about its centre, the largest sunspot rotation angle which has been reported.
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