期刊
MONTHLY NOTICES OF THE ROYAL ASTRONOMICAL SOCIETY
卷 451, 期 2, 页码 1522-1527出版社
OXFORD UNIV PRESS
DOI: 10.1093/mnras/stv1036
关键词
dynamo; Sun: activity; Sun: magnetic fields
资金
- RFBR [15-02-01407]
- ISTP SB RAS project under the Program of Fundamental Research of SB RAS [II.16.3.1]
- Program of the Presidium of Russian Academy of Sciences [21]
In order to clarify a possible role of small-scale dynamo in formation of solar magnetic field, we suggest an observational test for small-scale dynamo action based on statistics of anti-Hale sunspot groups. As we have shown, according to theoretical expectations the small-scale dynamo action has to provide a population of sunspot groups which do not follow the Hale polarity law, and the density of such groups on the time-latitude diagram is expected to be independent on the phase of the solar cycle. Correspondingly, a percentage of the anti-Hale groups is expected to reach its maximum values during solar minima. For several solar cycles, we considered statistics of anti-Hale groups obtained by several scientific teams, including ours, to find that the percentage of anti-Hale groups becomes indeed maximal during a solar minimum. Our interpretation is that this fact may be explained by the small-scale dynamo action inside the solar convective zone.
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