A polarization-intensity anticorrelation diagram for the solar coronal green line

We analyze the complex pattern of anticorrelation between the degree of pol arization p in the green lambda 530.3-nm line and its intensity I-lambda, w hich was revealed by coronal observations during the total solar eclipse of July 11, 1991. For coronal points located at approximately the same distan ce from the disk center, the anticorrelation diagram breaks up into two bra nches with a zone of avoidance between them. High-latitude streamers form t he upper branch, while the lower branch belongs to active equatorial region s. The arrangement of large-scale coronal structures in the p-logI(lambda) diagram is considered for a distance of 1.2R(circle dot). The change in ant icorrelation diagram with distance is analyzed in detail for the giant high -latitude coronal streamers observed on July 11, 1991. Our results contain important information about the scattering of photospheric radiation at lin e frequencies in the presence of a coronal magnetic field. (C) 2001 MAIK "N auka/Interperiodica".