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Measurements of the limb darkening in the forbidden Mgiline at 4571.1 Å

✍ Scribed by O. R. White; R. C. Altrock; J. W. Brault; C. D. Slaughter

Publisher
Springer
Year
1972
Tongue
English
Weight
412 KB
Volume
23
Category
Article
ISSN
0038-0938

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✦ Synopsis

We report high resolution measurements of the center-to-limb variation of the MgI line at 4571.1 N. This forbidden line is of interest because it should be formed in LTE. Comparison of our measurements with the Harvard-Smithsonian Reference Atmosphere show that the line center radiation originates in the temperature minimum region from 330 to 550 km above the point where ~co~t~nul, m = 1. Observations near the limb confirm that the temperature minimum is ~4200K.

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