Reversed-polarity structures of chromospheric magnetic field

Details Reversed-polarity structures of chromospheric magnetic field Reversed-polarity structures of chromospheric magnetic field

Apr 1994

adsabs.harvard.edu/cgi-bin/nph-data_query?bibcode=1994soph..151....1l&link_type=abstract

Solar Physics, vol. 151, no. 1, p. 1-14

Physics

19

Chromosphere, Magnetic Signatures, Polarity, Solar Magnetic Field, Magnetic Effects, Magnetic Flux, Photosphere, Red Shift, Solar Flares, Solar Physics

Scientific paper

Reversed-polarity structures of chromospheric magnetic fields are magnetic gulfs and islands of opposite polarity relative to the underlying photospheric fields. In this paper data measured with the Solar Magnetic Field Telescope of the Huairou Solar Observing Station in Beijing were analyzed. From more than 300 pairs of photospheric magnetograms (in Fe I lambda 5324.19A) and relevant chromospheric magnetograms (H beta lambda 4861.34 A), the reality of the reversed-polarity structures is demonstrated. According to an analysis of the fine structure of the magnetic field in the two layers of active regions, we found that there are probably four different types as follows: Type A are magnetic islands of opposite polarity corresponding to photospheric fields appearing in the chromospheric magnetogram. Type B are magnetic gulfs of opposite polarity corresponding to photospheric fields appearing in the chromospheric magnetogram. Type C is the reverse of Type B. That is, a magnetic gulf of opposite polarity corresponding to the chromospheric field appears in the photospheric magnetogram. Type D is the reverse of Type A.

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