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The rotation of the solar coronal holes was studied. Data from the Kitt Peak Observatory in the line 10830 Å He I for 2003—2012 was used for this purpose. The rotation of 434 coronal holes in the latitude interval ±40° was studied. The maximum angular velocity is observed at latitudes ±15°. Coronal holes have a lower angular velocity (13.39 deg/day) and rotate less differentially than the solar photosphere.
Variations in the solar differential rotation have been studied at the moment of the polarity reversal of the sun’s general magnetic field in solar activity cycles 20 and 21. Data on Hα filaments obtained at the Abastumani Astrophysical Observatory and on compact magnetic features from an atlas of synoptic charts were used. Before and after a single polarity reversal of the solar magnetic field (cycle...
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