Solar rotation 1947-1981 - Determined from sunspot data

Details Solar rotation 1947-1981 - Determined from sunspot data Solar rotation 1947-1981 - Determined from sunspot data

Sep 1983

adsabs.harvard.edu/cgi-bin/nph-data_query?bibcode=1983a%26a...125..355l&link_type=abstract

Astronomy and Astrophysics (ISSN 0004-6361), vol. 125, no. 2, Sept. 1983, p. 355-358.

Astronomy and Astrophysics

Astrophysics

43

Angular Velocity, Data Reduction, Solar Cycles, Solar Rotation, Sunspots, Curve Fitting, Sidereal Time, Velocity Measurement

Scientific paper

Positions of sunspots between 1947 and 1981 as observed at the Solar-Observatory Kanzelhöhe were used to determine the differential rotation of the sun. Whereas equatorial velocities increased, the gradient of the differential rotation decreased during this period. Further, velocities at the equator during solar-minimum years are greater than in the neighbouring maxima. Additionally, the author examined more closely the rotational behavior during the various spot cycles.

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