Solar rotation during the Maunder Minimum

Details Solar rotation during the Maunder Minimum Solar rotation during the Maunder Minimum

Jan 1976

adsabs.harvard.edu/cgi-bin/nph-data_query?bibcode=1976soph...46....3e&link_type=abstract

Solar Physics, vol. 46, Jan. 1976, p. 3-14.

Physics

37

Secular Variations, Solar Activity, Solar Rotation, Sunspot Cycle, Angular Velocity, Drawings, Dynamo Theory, Radial Velocity

Scientific paper

Solar surface rotation has been measured from sunspot drawings made in A.D. 1642-1644, probable differences from present-day rates are found. The 17th-century sunspots rotated faster near the equator by 3 or 4%, and the differential rotation between zero and + or - 20 deg latitude was enhanced by about a factor 3. These differences are consistent features in both spots and groups of spots and in both hemispheres. It is assumed that this apparent change in surface rotation was related to the ensuing dearth of solar activity (the Maunder Minimum) which persisted until about 1715.

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