Properties of space and time distribution of solar coronal holes
Properties of space and time distribution of solar coronal holes
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DOI：
10.1023/a:1005109200233
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发表时间：
1999-09-01
期刊：
影响因子：
2.8
通讯作者：
Ivanov, VG
中科院分区：
文献类型：
--
作者：
Ikhsanov, RN;Ivanov, VG
研究了太阳日冕洞的时空分布特性。本文使用了UAG-102星表1995年以前的资料和太阳地球物理资料的天气H α图。发现极地和赤道CH均可分为两个亚类。时间类的性质被识别。考虑了循环CH的统计权值，可以更准确地确定不同类别CH的旋转特征。结果表明，具有长寿命的赤道CH具有与太阳黑子群相似的微分旋转，而长寿命的极地CH具有刚体旋转。得出了两类大尺度太阳磁场存在的结论。
The space and time distribution properties of solar coronal holes (CH) are investigated. The data of the catalogue UAG-102, supplemented up to 1995, and synoptic H alpha-charts of Solar Geophysical Data are used. It was found that both the polar and equatorial CH can be divided into two subclasses. The properties of time classes are discerned. Statistical weights of the recurrent CH are accounted, which allow to determine the character of rotation of the different classes of CH with more accuracy. It was shown that the equatorial CH with long lifetimes possess differential rotation that is similar to sunspot groups, and the long-living polar CH rotate as a rigid body. A conclusion about the existence of two types of large-scale solar magnetic fields is made.