Additional measurements of the high-latitude sunspot rotation rate /Research note/

Details Additional measurements of the high-latitude sunspot rotation rate /Research note/ Additional measurements of the high-latitude sunspot rotation rate /Research note/

Oct 1981

adsabs.harvard.edu/cgi-bin/nph-data_query?bibcode=1981soph...73..379l&link_type=abstract

Solar Physics, vol. 73, Oct. 1981, p. 379-382.

Physics

Solar Rotation, Sunspots, Angular Velocity, Solar Magnetic Field

Scientific paper

Sunspot rotation rate measurements at high sunspot latitudes are reported for the period 1966-68, based on ten spots at latitudes greater than about 28 deg from H-alpha patrol records for this period. A sidereal rotation rate of 13.70 + or - 0.07 deg/day was found on the average, at 31.05 + or - 0.01 deg. Taken together, the full set of measurements in this latitude regime yield a rotation rate that is in excellent agreement with the result derived by Newton and Nunn (1951) from recurrent spots at lower latitudes throughout the six cycles from 1878 to 1944.

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