𝔖 Bobbio Scriptorium
✦   LIBER   ✦

The analysis of XUV emission lines

✍ Scribed by George L. Withbroe

Book ID
104648180
Publisher
Springer
Year
1975
Tongue
English
Weight
734 KB
Volume
45
Category
Article
ISSN
0038-0938

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✦ Synopsis

A technique for analyzing measurements of XUV spectral line intensities is described. Application of the technique to OSO-4 and OSO-6 spectra indicates that the mean coronal temperature is 2.1 x 106 K in typical active solar regions and that the mean coronal temperature in typical quiet regions ranges from 1.5 x 106 to 2.1 β€’ 106 K. One active region spectrum shows evidence for substantial quantities of coronal material with 2 β€’ 106<T<3.5 β€’ 106 K. Measurements from limb spectra show evidence that (l) coronal abundances of N and O are low relative to heavier elements; or (2) that the ionization equilib;ium calculations used may contain systematic errors; or (3) that the XUV intensity measurements may be incorrectly calibrated.

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