Crimean observations of the magnetic Sun: 1967–2018

  • Valerii Kotov Crimean Astrophysical Observatory, Nauchny, 298409
Keywords: CrAO history, Sun, magnetic field, rotation, 11-year cycle


The magnetic field measurements of the Sun as a star initiated by academician A.B. Severny have been supported by six other observatories. The history of such investigations at CrAO and the basic results are briefly described. The synodic spin period of the gravitating solar mass P= 27.027(6) days is determined; the latter is shown to be linked to the Earth’s motion: the Sun performs 27 semi-revolutions over one terrestrial year, and the Earth – the same number of its revolutions with period PD during one full solar rotation. The field is also changing with the Hale cycle PH ≈ 22 years and the cycle P7 = 7 years, whereas their ratio coincides with the Archimedes approximation, 22:7, for the π number, the timescale (π - 3)P7 = P2/2PD – with the Earth’s orbital period. We provide arguments in favour of the cosmic origin of both cycles and holographic expressions, including PH, P7, π, and universal constants


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How to Cite
Kotov V., 2020. Izvestiya Krymskoi Astrofizicheskoi Observatorii, vol. 116, no. 1, pp. 14-23. DOI: 10.31059/izcrao-vol116-iss1-pp14-23
To the 75th anniversary of CrAO