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Investigation of the solar rotation using group of sunspots in 1985-1999
Conference proceeding

Investigation of the solar rotation using group of sunspots in 1985-1999

H M Basurah, Y M Almleaky, A A Goharji and A Malawi
SOLSPA 2001: PROCEEDINGS OF THE SECOND SOLAR CYCLE AND SPACE WEATHER EUROCONFERENCE, Vol.477(477), pp.77-78
ESA SPECIAL PUBLICATIONS
01/01/2002

Abstract

Astronomy & Astrophysics Physical Sciences Science & Technology
Based on measurements of sunspots groups at King Abdul-Aziz Solar Observatory (KAAUSO) 1985-1999, we determined the solar differential rotation during solar activity cycle No. 22 and part of 23. We found that the rotation rate for the sunspots groups is W =14.02 - 2.87 sin<^>2 f (deg/day), which is less than the rate of the individual sunspots that reduced from the same measurements by about 0.7%.

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