Active longitudes of sunspots |
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Authors: | S V Olemskoy L L Kitchatinov |
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Institution: | 1. Institute of Solar-Terrestrial Physics (ISZF), Siberian Branch, Russian Academy of Sciences, P.O. Box 291, Irkutsk, 664033, Russia
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Abstract: | The inhomogeneity of the sunspot group longitude distribution has been determined depending on the rotation period used to determine a longitude. The statistical significance of the found active longitudes has been estimated. It has been indicated that a rather high reliability is reached only when the synodic rotation period is close to 27 and 28 days. In this case active longitudes show the long-term variation related to the north-south asymmetry of the sunspot formation. It is assumed that active longitudes are related to the relic magnetic field frozen in a uniformly rotating solar radiative zone. |
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