Rotation of the Solar Equator

Regular measurements of the general magnetic field of the Sun, performed over about half a century at the Crimean Astrophysical Observatory, the J. Wilcox Solar Observatory, and five other observatories, are considered in detail for the time 1968 – 2016. They include more than twenty-six thousand da...

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Bibliographic Details
Published inSolar physics Vol. 292; no. 6; p. 1
Main Author Kotov, V. A.
Format Journal Article
LanguageEnglish
Published Dordrecht Springer Netherlands 01.06.2017
Springer Nature B.V
Subjects
Astrophysical observatories
Astrophysics and Astroparticles
Atmospheric Sciences
Equator
Field strength
Line of sight
Magnetic fields
Magnetic resonance
Observatories
Physics
Physics and Astronomy
Solar flares
Solar observatories
Solar physics
Solar rotation
Solar system
Space Exploration and Astronautics
Space Sciences (including Extraterrestrial Physics
Sun
Photosphere
Magnetic field
Rotation
The Sun
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Summary:Regular measurements of the general magnetic field of the Sun, performed over about half a century at the Crimean Astrophysical Observatory, the J. Wilcox Solar Observatory, and five other observatories, are considered in detail for the time 1968 – 2016. They include more than twenty-six thousand daily values of the mean line-of-sight field strength of the visible solar hemisphere. On the basis of these values, the equatorial rotation period of the Sun is found to be 26.926(9) d (synodic). It is shown that its half-value coincides within error limits with both the main period of the magnetic four-sector structure, 13.4577(25) d, and the best-commensurate period of the slow motions of the major solar system bodies, 13.479(22) d (sidereal). The probability that the two periods coincide by chance is estimated to be about 10 − 7 . The true origin of this odd resonance is unknown.
ISSN:0038-0938
1573-093X
DOI:10.1007/s11207-017-1100-9