2015/05/07 by D. Sokoloff, D. D. Sokoloff, A. Khlystova +3 · 34 citations
Computer Science · Physics and Astronomy · #Astro and Planetary Science #Astronomy #Astrophysics #Dynamo #Dynamo theory #Magnetic field #Physics #Polarity (international relations) #Population #Solar Radiation and Photovoltaics #Solar and Space Plasma Dynamics #Solar cycle #Solar dynamo #Solar maximum #Solar minimum #Solar wind #Sunspot #astro-ph.SR
paper · pdf · doi:10.1093/mnras/stv1036
published in Monthly Notices of the Royal Astronomical Society 451(2), 1522-1527 (Oxford University Press) · 6 pages, 5 figures, accepted for publication in MNRAS
arxiv created 2015/05/07 · openalex publication_date 2015/06/05 · arxiv updated 2017/05/01 · openalex created_date 2025/10/10 · openalex updated_date 2026/08/05
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.