Physics
Scientific paper
Oct 1974
adsabs.harvard.edu/cgi-bin/nph-data_query?bibcode=1974soph...38..283h&link_type=abstract
Solar Physics, vol. 38, Oct. 1974, p. 283-299.
Physics
74
Magnetic Flux, Magnetometers, Polarity, Solar Magnetic Field, Solar Spectrometers, Spectroheliographs, Data Reduction, Heliometers, Latitude, Magnetic Field Configurations, Magnetic Signatures, Magnetic Variations, Solar Activity, Solar Corona, Solar Observatories, Spherical Harmonics
Scientific paper
The telescope, spectrograph, and magnetograph at the 150-ft Tower Telescope at Mount Wilson are described, and a chronology of changes in the instrumentation is given. The average magnetic field strengths over the last seven years are discussed. The changes in polarity at the poles of the sun are described. The characteristics of these polarity reversals at both poles are similar. A reversal is not seen in the sunspot latitudes but is observed to start in the 40-50 deg zone and proceed slowly poleward, reaching the pole within 12 to 18 months. At the time of the polarity reversal at the pole, field strengths over a large portion of the disk show similar behavior. Rapid changes of solar magnetic fields over large portions of the solar disk are discussed. Two possible models are suggested to explain the frequent 'monopole' appearance of the solar fields.
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