Astronomy and Astrophysics – Astronomy
Scientific paper
Mar 1992
adsabs.harvard.edu/cgi-bin/nph-data_query?bibcode=1992acasn..33...95w&link_type=abstract
Acta Astronomica Sinica (ISSN 0001-5245), vol. 33, no. 1, March 1992, p. 95-100. In Chinese.
Astronomy and Astrophysics
Astronomy
4
Chromosphere, Polarized Radiation, Solar Flares, Solar Magnetic Field, Photosphere, Sunspots
Scientific paper
In the chromosphere, a localized magnetic feature with polarity opposite to the underlying photospheric magnetic field is observed above a fast formed sunspot. The strength of this reversal polarity is as strong as several hundred gauss. Centering around the reversal polarity, seven subflares are observed during nine hours before and after the reversal. Each flare shows progressively increasing size and spatial extent with the development of the reversal polarity. The reversal polarity above the photosphere can only mean that the magnetic lines of force have been kinked, twisted or knotted, or a close flux system has been formed above the photosphere. This newly observed phenomenon has not yet been possible to predict by either the current sunspot models or flare models.
Shi Zhong-Xian
Wang Jing-Xiu
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