Abstract
Slitless VUV spectra of the eclipsed Sun were obtained from a rocket experiment for the first time during the 1970 eclipse. The spatially resolved spectra of a quiescent prominence in the wavelength range 900 Å–2200 Å consist of emission lines from ions formed in the temperature range 3.5 × 104k–3.2 × 105k. The spectral intensities have been interpreted in terms of physical parameters which indicate a transition zone of shell-like layers, the inner the cooler and thinner, the outer the hotter and more extended. The transition zone is about 3 km thick for a model thread of 2000 km in diameter.
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Yang, C.Y., Nicholls, R.W. & Morgan, F.J. Studies of the prominence-corona transition zone from rocket ultraviolet spectra of the March 1970 eclipse. Sol Phys 45, 351–362 (1975). https://doi.org/10.1007/BF00158455
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DOI: https://doi.org/10.1007/BF00158455