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Line intensities in the photosphere-chromosphere transition region

✍ Scribed by E. L. Dessel

Publisher
Springer
Year
1975
Tongue
English
Weight
639 KB
Volume
44
Category
Article
ISSN
0038-0938

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✦ Synopsis

Eclipse observations of total line intensities (Cr ~: two groups of lines; Ti II, Fe II and Cr iI: two lines each) are interpreted in terms of departures from LTE. The same method as described in Paper III is used. The HSRA model is used to compute the LTE populations. A distribution of NLTE-coefficients is obtained for each group of lines. The lines discussed in the present paper are seen to remain in emission down to some 1000 km inside the limb. As a consequence, interpretation is less simple than for the Fe I lines (Paper III); population and excitation temperatures are found to be rather divergent from Holweger's temperature, which was used for a first approximation.

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