Magnetic field structures of solar active regions obtained by polarization mapping observation at 32 GHz

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Polarimetry, Solar Activity, Solar Magnetic Field, Solar Radio Emission, Circular Polarization, Field Strength, Polarization Characteristics

Scientific paper

Solar radio polarization mapping observation was made at 32 GHz with an angular resolution of 3.6 arcmin on February 2 and 4, 1981. The polarization map represents the distribution of the difference between right-handed (R) and left-handed (L) circular polarization components on the sum (R-L). The polarization maps of two days showed that four active regions on the sun had clear bipolar structures which were consistent with those observed on the magnetograms. The peak value of the circular polarization degree in the active regions lay between 0.4 percent and 2.5 percent, which suggests that the longitudinal magnetic field strength at the chromospheric level was between 20 G and 140 G.

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