Ratan-600 observations of unusual inversion of polarization

Abstract We have made multiwavelength radio intensity and circular polarization observations of sunspot associated bipolar sources using RATAN-600 in the wave band 1.00 to 30 cm. We have found unusual inversion of the circular polarization of the microwave emission in both components of its bipolar structure at 14.5 cm. We explain the observed polarization by linear coupling, using a magnetic field parallel to the solar meridian, i.e. perpendicular to the plane connecting the spots of the group. This field may be a general magnetic field of the Sun, or some large-scale structure in the upper corona.