aat

Acta Astrophys. Tau.

Acta Astrophysica Taurica

2712-925X

Kiselev Nikolai Nikolaevich, Mosсow, settlement Moskovskii, Tat'yanin Park Str., 12, Moscow, Russia.

10.31059/aat.vol1.iss2.pp6-12

Reviewes

Crimean observations of the magnetic Sun: 1967–2018

Kotov

Valerii

Crimean Astrophysical Observatory, Nauchny, 298409

26 12 2020

1 2 6 12 26 12 2020

2026

Valerii Kotov

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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 makes 27 semi-revolutions over one terrestrial year, and the Earth – the same number of its revolutions with the period P D during one full solar rotation. The field changes with the Hale cycle P H ≈ 22 years and the cycle P 7 = 7 years, whereas their ratio coincides with the Archimedes approximation, 22:7, for the π number, the timescale ( π - 3) P 7 = P ⊙ 2 / 2 P D – with the Earth’s orbital period. We provide arguments in favour of the cosmic origin of both cycles and holographic expressions, including P H , P 7 , π , and universal constants.

CrAO history Sun magnetic field rotation 11-year cycle

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