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The possible presence of C2lines in sunspot spectra

✍ Scribed by D. L. Lambert; E. A. Mallia

Publisher
Springer
Year
1973
Tongue
English
Weight
216 KB
Volume
31
Category
Article
ISSN
0038-0938

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✦ Synopsis

Indirect evidence against the presence of C2 lines in umbral spectra is discussed. The dominant role of CO in the molecular equilibrium of C at umbral temperatures ensures that CN, CH and Cz lines are formed in the same atmospheric regions. Observations of CN and CH umbral lines are in good accord with predictions based on accepted umbral model atmospheres. This implies that C2 must follow the predictions and that it is too weak to contribute to the umbral spectrum. C~ lines in the photosphere and penumbrae are in excellent quantitative agreement with predictions. Additional tests are proposed.

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