A possible variation of the solar rotation with the activity cycle

Details A possible variation of the solar rotation with the activity cycle A possible variation of the solar rotation with the activity cycle

Dec 1976

adsabs.harvard.edu/cgi-bin/nph-data_query?bibcode=1976apj...210l.159h&link_type=abstract

Astrophysical Journal, vol. 210, Dec. 15, 1976, pt. 2, p. L159-L161.

Astronomy and Astrophysics

Astrophysics

50

Solar Activity, Solar Rotation, Sunspot Cycle, Error Analysis, Latitude, Lines Of Force, Magnetic Signatures, Photosphere, Solar Magnetic Field, Solar Spectra

Scientific paper

Daily spectroscopic observation of the rotation of the sun indicates that several slow changes have taken place since 1967. The equatorial rotation rate of the photospheric gas has gradually increased until, in 1976, it is close to the sunspot rate determined by Newton and Nunn (1951). The latitude gradient at middle latitudes decreased starting in 1974, and the latitude gradient at high latitudes has increased in the same interval. An increase in the number of low-latitude active regions may be responsible for accelerating the photospheric gas.

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