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arXiv 2203.01274astro-ph.SR
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违反Hale极性定律活动区的合成太阳周

Synthetic solar cycle for active regions violating the Hale's polarity law

A. Zhukova, A. Khlystova, V. Abramenko, D. Sokoloff

摘要:

双极活动区(AR)的长期观测序列提供了有关全球太阳磁场极向和环向分量相互转换的重要信息。根据黑尔极性定律,环向场的方向决定了AR中领先黑子的极性。绝大多数双极AR都遵循这种规律,而少数AR具有相反的极性(反黑尔AR)。然而,对这些AR的研究受到其统计数据不足的阻碍。本文将16-18和23、24年5个11年周期的资料综合起来,编制了一个具有独特时长和纬向宽度的合成周期。合成周期包括14838个AR的数据,其中367个是抗Hale AR。演示了编译合成循环的特定例程。我们发现,在一般情况下,反黑尔AR遵循太阳活动周期,并均匀地分布在整个时间-纬度图,这意味着它们与全球发电机机制和环形通量系统的根本联系。它们的数量和百分比的增加发生在周期的第二部分,这有利于它们对极场反转的贡献。反海尔AR的百分比在蝴蝶图的边缘和附近的一个即将到来的太阳极小值(在那里的环向场减弱)的过剩可能与湍流对流和磁场波动的影响,对出现的通量管的加强。磁赤道和日面赤道之间的错位的证据也被发现。

英文摘要:

Long observational series for bipolar active regions (ARs) provide significant information about the mutual transformation of the poloidal and toroidal components of the global solar magnetic field. The direction of the toroidal field determines the polarity of leading sunspots in ARs in accordance with the Hale's polarity law. The vast majority of bipolar ARs obey this regularity, whereas a few percent of ARs have the opposite sense of polarity (anti-Hale ARs). However, the study of these ARs is hampered by their poor statistics. The data for five 11-year cycles (16-18 and 23,24) were combined here to compile a synthetic cycle of unique time length and latitudinal width. The synthetic cycle comprises data for 14838 ARs and 367 of them are the anti-Hale ARs. A specific routine to compile the synthetic cycle was demonstrated. We found that, in general, anti-Hale ARs follow the solar cycle and are spread throughout the time-latitude diagram evenly, which implies their fundamental connection with the global dynamo mechanism and the toroidal flux system. The increase in their number and percentage occurs in the second part of the cycle, which is in favour of their contribution to the polar field reversal. The excess in the anti-Hale ARs percentage at the edges of the butterfly diagram and near an oncoming solar minimum (where the toroidal field weakens) might be associated with strengthening of the influence of turbulent convection and magnetic field fluctuations on the arising flux tubes. The evidence of the misalignment between the magnetic and heliographic equators is also found.

机构、总结、中文摘要均由AI分析而来,可能存在错误,请以论文正文为准。

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