High-resolution Studies of the Polar Magnetic Fields during Cycle 23
作者： J. Varsik , C.J. Durrant , J. Turner , P.R. Wilson
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摘要: High-resolution mosaics of the solar polar magnetic fields have been constructed using individual magnetograms obtained with video magnetograph Big Bear Solar Observatory, and properties these are demonstrated in this paper. The show selected regions on several days during rising phase Cycle 23, related to global (i) by superposing mosaic for a given day full-disk SOHO-MDI magnetogram same day, (ii) plotting projection identify approximate reported NSOKP synoptic plots, (iii) imposing locations Hα filaments order infer neutral lines large-scale fields. We studied fine structure unipolar near poles and, particular, histograms field intensities within particular way, estimated ratios number knots opposite polarities plumes. also generated enlargements daily magnetograms. These statistical studies shown that which BBSO not available, may be used study high-resolution Time-series over four-hour periods September 6 November 18 considerable evolution existing flux formation new has taken place periods.
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