The Evolution of Coronal Holes over Three Solar Cycles Using the McIntosh Archive
The Evolution of Coronal Holes over Three Solar Cycles Using the McIntosh Archive
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DOI：
10.1007/s11207-020-01731-y
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发表时间：
2020-11-13
期刊：
影响因子：
2.8
通讯作者：
McIntosh, Scott W.
中科院分区：
文献类型：
--
作者：
Hewins, Ian M.;Gibson, Sarah E.;McIntosh, Scott W.
利用麦金托什太阳特征档案，我们分析了日冕洞在三个以上的太阳周期内的演化。我们证明了日冕黑洞的位置和寿命在从几个月到几年的时间尺度上发生了显著的变化，并且这些变化的模式显然与太阳活动周期有关。我们证明了低纬冕洞的寿命通常不到一周，但可能延长到近三年。当随着时间的推移绘制时，低纬冕洞的位置在一个太阳周期内保持可见，根据它们在太阳周期中的位置跟踪太阳黑子蝴蝶图。最后，我们证实了冕洞一般不是刚性旋转的。
Using the McIntosh Archive of solar features, we analyze the evolution of coronal holes over more than three solar cycles. We demonstrate that coronal-hole positions and lifetimes change significantly on time scales from months to years, and that the pattern of these changes is clearly linked to the solar-activity cycle. We demonstrate that the lifetimes of low-latitude coronal holes are usually less than one rotation but may extend to almost three years. When plotted over time, the positions of low-latitude coronal holes that remain visible for over one rotation track the sunspot butterfly diagram in terms of their positions on the Sun over a solar cycle. Finally, we confirm that coronal holes do not in general rigidly rotate.