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Lifecycle of a large-scale polar coronal pseudostreamer/cavity system

Auchère, Frédéric; Rachmeler, Laurel; Seaton, Daniel +1 more

We report on an exceptional large-scale coronal pseudostreamer/cavity system in the southern polar region of the solar corona that was visible for approximately a year starting in February 2014. It is unusual to see such a large closed-field structure embedded within the open polar coronal hole. We investigate this structure to document its format…