Investigation of N–S asymmetry of solar differential rotation by various patterns for solar cycles 20 and 21 |
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Authors: | MSh Gigolashvili DR JaparidzeTG Mdzinarishvili |
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Institution: | E.K. Kharadze Abastumani Astrophysical Observatory at Ilia State University, Kakutsa Cholokashvili Ave 3/5, Tbilisi 0162, Georgia |
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Abstract: | For solar cycles 20 and 21 the latitudinal variations of the solar rotation rates are found using data of the Hα filaments and the long-lived magnetic features of negative and positive polarities. Analysis of the data showed that: (a) there is N–S asymmetry in the equatorial rotation of the Hα filaments and the long-lived magnetic features; (b) for both solar cycles the long-lived magnetic features of both polarities have similar behavior; (c) in the solar cycle 20 the long-lived magnetic features of both polarities vary in phase to each other but show some difference during cycle 21. For the long-lived magnetic features of positive polarity the confidence level is lower than for those of negative one. |
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Keywords: | Sun Filaments Magnetic patterns Differential rotation N&ndash S asymmetry |
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