Studies of the prominence-corona transition zone from rocket ultraviolet spectra of the March 1970 eclipse

✍ Scribed by C. Y. Yang; R. W. Nicholls; F. J. Morgan

• Book ID: 104648183
• Publisher: Springer
• Year: 1975
• Tongue: English
• Weight: 570 KB
• Volume: 45
• Category: Article
• ISSN: 0038-0938
• DOI: 10.1007/bf00158455

✦ Synopsis

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 A.-2200 A_ 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 sheIMike 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.

2. Data Analysis

The VUV spectrum of the quiescent prominence contains emission lines from ions, e.g.