Astronomy and Astrophysics – Astrophysics
Scientific paper
May 1992
adsabs.harvard.edu/cgi-bin/nph-data_query?bibcode=1992esasp.344...87.&link_type=abstract
Conference on Solar Physics and Astrophysics at Interferometric Resolution, p. 87 - 90
Astronomy and Astrophysics
Astrophysics
Scientific paper
The unique possibility of observing the solar corona with a large telescope at high altitude has been fully exploited with the 3.60 m CFHT in Hawai, during the 11 July 1991 eclipse. One of the four cameras installed in the primary focus was a video-CCD camera with a red filter at 637 nm. The spatial resolution as measured at the Moon limb was better than one arcsec. 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. The authors 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 corona and should be observed in UV emission lines in a wide range of temperatures.
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