Magnetic cycles of the Sun inferred from its mean magnetic field

Article Sidebar

PDF XML
Published: Nov 19, 2023
Abstract views: 219
PDF downloads: 108
DOI: https://doi.org/10.34898/aat.vol4.iss3.pp16-20
Keywords:
The Sun Photosphere magnetic field 22-year cycle

Main Article Content

Valery Kotov
Crimean Astrophysical Observatory, Nauchny, 298409

Abstract

Over the past 55 years, the Crimean Astrophysical Observatory, the Wilcox Solar Observatory, and five other observatories of the world registered the mean magnetic field of the Sun observed as a star (in all, about 29 thousand daily values of the longitudinal field strength of the visible solar hemisphere were acquired from 1968 through 2022). This field varies with two periods: 21.5(7) years, corresponding to the Hale cycle PH = 22.14(8) years; and a period of 7.08(10) years, which is about three times shorter than PH (the precise ratio, 3.13(5), reminds of the Archimedes approximation, 22:7, of the π number). A special analysis of the solar polar fields (Stanford data for 1976-2022) proves the reality of the magnetic 7-year cycle of the Sun, whose nature is unknown

Supporting Agencies

CrAO

Downloads

Download data is not yet available.

Article Details

How to Cite
Kotov V., 2023. Acta Astrophysica Taurica, vol. 4, no. 3, pp. 16–20. DOI: 10.34898/aat.vol4.iss3.pp16-20
Issue
Vol. 4 No. 3 (2023)
Section
To the 80th anniversary of V.A. Kotov

Copyright (c) 2023 Valery Kotov

The metadata for this submission is licensed under a Creative Commons Attribution 4.0 International License.

Copyright and publishing rights for texts published in Acta Astrophysica Taurica is retained by the authors, with first publication rights granted to the journal.Texts are free to use with proper attribution and link to the licensing (Creative Commons Attribution 4.0 International).

Creative Commons License

References

Chaplin W.J., Dumbill A.M., Elsworth Y., et al., 2003. Mon. Not. Roy. Astron. Soc., vol. 343, pp. 813–818.

Demidov M.L., Zhigalov V.V., Peshcherov V.S., Grigoryev V.M., 2002. Solar Phys., vol. 209, pp. 217–232.

Dicke R.H., 1978. Nature, vol. 276, pp. 676–680.

Frick P., Sokoloff D., Stepanov R., Pipin V., Usoskin I., 2020. Mon. Not. Roy. Astron. Soc., vol. 491, pp. 5572–5578, doi:10.1093/mnras/stz3238.

Gorobetz B., 2004. Nauka Zhisn, no. 2, pp. 64–69.

Kotov V.A., 2006. Solar Phys., vol. 239, pp. 461–474, doi:10.1007/s11207-006-0146-x.

Kotov V.A., 2019. Astrophys. Space Sci., vol. 364, no. 3, pp. 1–5, doi:10.1007/s10509-019-3534-z.

Kotov V.A., 2020. Izv. Krym. Astrofiz. Obs., vol. 116, no. 1, pp. 14–23, doi:10.31059/izcrao-vol116-iss1-pp14-23.

Kotov V.A., Sanchez F.M., 2017. Astrophys. Space Sci., vol. 362, no. 6, pp. 1–6, doi:10.1007/s10509-016-2985-8.

Lopes F., Le Mouel J.L., Courtillot V., Gibert D., 2021. Phys. Earth Planet Inter., vol. 316, 106693, doi:10.1016/j.pepi.2021.106693.

Malkin Z., Miller N., 2010. Earth Planets Space, vol. 62, no. 12, pp. 943–947, doi:10.5047/eps.2010.11.002.

Munk W.H., MacDonald G.T.F., 1960. The Rotation of the Earth. Cambridge: Cambridge University Press.

Obridko V.N., 2008. In Zeleny L.M., Veselovskii I.S. (Eds.), Plazmennaya geliofizika, vol. 1. Moscow: Fizmatlit, pp. 41–57. (In Russ.)

Scafetta N., 2020. Solar Phys., vol. 295, iss. 2, art. id. 33, doi:10.1007/s11207-020-01599-y.

Scargle J.D., 1982. Astrophys. J., vol. 263, pp. 835–853.

Scherrer P.H., Wilcox J.M., 1983. Solar Phys., vol. 82, pp. 37–42.

Scherrer P.H., Wilcox J.M., Kotov V., Severny A.B., Howard R., 1977a. Solar Phys., vol. 52, pp. 3–12.

Scherrer P.H., Wilcox J.M., Svalgaard L., Duvall T.L., Jr., Dittmer P.H., Gustafson E.K., 1977b. Solar Phys., vol. 54, pp. 353–361.

Severny A., 1966. Uspehi Fiz. Nauk, vol. 88, no. 1, pp. 3–50.

Severny A., 1969. Nature, vol. 224, pp. 53–54.

Smith M.L., Dahlen F.A., 1981. Geophys. J. Roy. Astron. Soc., vol. 64, pp. 223–281.