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A morphological study of unipolar magnetic fields and the relationship with sunspots
Journal of Atmospheric and Solar-Terrestrial Physics ( IF 1.8 ) Pub Date : 2021-03-26 , DOI: 10.1016/j.jastp.2021.105625
Syun-Ichi Akasofu

A morphological examination of the Kitt Peak photospheric magnetic maps has been made over three sunspot cycles in order to study the morphology of unipolar magnetic regions and sunspots. Unipolar magnetic regions (positive and negative) are a series of weak, large-scale longitudinal bands, extending from 0° to 60° in latitude and alternatively aligned in longitude. The first finding is that unipolar regions grow and decay with the sunspot cycle and thus are likely to be a part of the basic solar (dipolar) magnetism, not old active regions located below 30° in latitude (as have long been considered). The second finding is that positive pores and single spots (coalesced pores, often called ‘isolated’ spots or ‘independent’ spots) occur in a positive unipolar region (vice vera). Thus, the unipolar regions could be the source of single spots. The third finding is that a pair (positive and negative) of dense clusters of pores, single spots and large spots (a coalesced single spots) occur at each side of the boundary of neighboring (positive and negative) unipolar regions, forming pairs of spots across the boundary; in fact, pairs of spots do not occur in the middle of a unipolar region. The boundaries of unipolar regions are tentatively identified as the Hale boundary, where solar activities (including solar flares) occur). Thus, it is suggested that the presently accepted magnetic tube theory may need a new consideration.



中文翻译:

单极磁场的形态学研究及其与黑子的关系

为了研究单极磁区和黑子的形态,对三个太阳黑子周期进行了Kitt Peak光球磁图的形态学检查。单极磁区(正负)是一系列较弱的大规模纵向带,它们在纬度上从0°延伸到60°,在经度上也可以对齐。第一个发现是,单极区域会随着太阳黑子的循环而增长和衰减,因此很可能是基本太阳(双极)磁性的一部分,而不是纬度低于30°的古老活动区域(长期以来就被认为是这样)。第二个发现是在阳性单极区(副静脉)出现阳性毛孔和单个斑点(毛孔,通常称为“孤立”斑点或“独立”斑点)。因此,单极区域可能是单个斑点的来源。第三个发现是,在相邻的(正负)单极区域的边界的每一侧出现一对(正负)孔隙,单个斑点和大斑点(聚结的单个斑点)的密集簇,形成了成对的斑点越界 实际上,在单极区域的中间不会出现成对的斑点。暂时将单极区域的边界标识为发生太阳活动(包括太阳耀斑)的黑尔边界。因此,建议当前接受的磁管理论可能需要重新考虑。实际上,在单极区域的中间不会出现成对的斑点。暂时将单极区域的边界标识为发生太阳活动(包括太阳耀斑)的黑尔边界。因此,建议当前接受的磁管理论可能需要重新考虑。实际上,在单极区域的中间不会出现成对的斑点。暂时将单极区域的边界标识为发生太阳活动(包括太阳耀斑)的黑尔边界。因此,建议当前接受的磁管理论可能需要重新考虑。

更新日期:2021-03-31
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