AbstractEclipse data on the large-scale velocity field of the green coronal line obtained by a Fabry-Perot interferometer combined with a blocking interference filter are presented. Eclipse interferograms of the solar corona of 1972 and 1981 indicate that coronal conditions are relatively quiet but not homogeneous. Doppler shifts of 95 % profiles do not exceed 20 km s−1. Large scale motions with velocities of 10 km s−1 are found for coronal regions. Effect of coronal rotation is evidently noted. Mean values of half width are are different for different coronal structures. In terms of “turbulent” velocities Vt equals 19.5, 22.5 and 27.5 in streamers, helmets and coronal holes respectively. A tendency for the decreasing of half width with distance in one helmet, possible increasing in holes and no evident dependence are found.
On the Fabry-Perot investigations of the solar corona: Eclipse observations of large-scale dynamics
Advances in Space Research ; 14 , 4 ; 45-48
01.01.1993
4 pages
Aufsatz (Zeitschrift)
Elektronische Ressource
Englisch
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