The effect of newly erupting flux on the polar coronal holes

Details The effect of newly erupting flux on the polar coronal holes The effect of newly erupting flux on the polar coronal holes

Sep 1989

adsabs.harvard.edu/cgi-bin/nph-data_query?bibcode=1989soph..119..323s&link_type=abstract

Solar Physics (ISSN 0038-0938), vol. 119, no. 2, 1989, p. 323-340. Research supported by the U.S. Navy.

Physics

55

Coronal Holes, Polar Cusps, Solar Corona, Solar Magnetic Field, Chromosphere, Magnetic Signatures, Polarity, Solar Cycles, Sunspots

Scientific paper

Chromospheric network enhancements that occur along the edges of the polar coronal holes immediately after sunspot minimum are studied. It is shown that these enhancements accompany the eruption of the first large high-latitude bipolar magnetic regions of the new sunspot cycle, and that these eruptions must have encountered relatively concentrated polar fields whose strengths decrease rapidly equatorward of about 60 deg latitude. The helium observations are compared with current-free magnetic field calculations, and it is found that the enhanced helium network occurs where relatively strong fields at high latitude become connected to newly erupted bipolar magnetic regions.

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