Abstract
Saddle structures are seen in some images of the Sun in the soft X-rays obtained by Yohkoh mission. At the center of any such structure, there is a small coronal hole having the outlines of an astroid or a cross. The coronal saddles occur in magnetic configurations with a high degree of symmetry (quadrupoles). Comparison with the models shows that open field lines cannot be modeled using only the source surface.
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