Abstract
We have obtained new consistent versions of the 400-yr time series of the Wolf sunspot number W, the sunspot group number G, and the total sunspot area S (or the total sunspot magnetic flux Φ). We show that the 11-yr cycle did not cease during the Maunder minimum of solar activity. The characteristics of the extrema of individual 11-yr cycles in 1600–2005 have been determined in terms of the total sunspot area index. We provide arguments for using alternating (“magnetic”) time series of indices in investigating the solar cyclicity.
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Original Russian Text © Yu.A. Nagovitsyn, 2007, published in Pis’ma v Astronomicheskiĭ Zhurnal, 2007, Vol. 33, No. 5, pp. 385–391.
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Nagovitsyn, Y.A. Solar cycles during the Maunder minimum. Astron. Lett. 33, 340–345 (2007). https://doi.org/10.1134/S1063773707050076
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DOI: https://doi.org/10.1134/S1063773707050076