Evidence of Plasmoid Ejection in the Corona from 1991 Eclipse Observations withthe Canada-France-Hawaii Telescope

摘要

The unique possibility of observing the Solar corona with a large telescope athigh altitude has been fully exploited with the 3.60 m CFHT in Hawaii, during the 11 July 1991 eclipse. During the 3 minutes long sequence, 6000 video images have been obtained. Among the fine structures recorded, a plasmoid about 1500 km wide was seen to ascend and dilute in the corona. We discuss the possible emission mechanisms and find that both low and relatively high temperature plasmas can be confined in this ejected plasmoid. Such a small scale phenomenon could be important for the heating of the corna and should be observed in uv emission lines in a wide range of temperatures. The high spatial resolution achieved by SIMURIS allows to study the shape, stability, and the diagnostics of such plasmoids in the corona.