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Observations of the center-to-limb variation of the solar brightness in the far infrared (10 to 25 microns)

✍ Scribed by Pierre J. Léna

Publisher
Springer
Year
1968
Tongue
English
Weight
405 KB
Volume
3
Category
Article
ISSN
0038-0938

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✦ Synopsis

Existing models of the solar atmosphere predict a limb brightening in the far infrared wavelengths. At shorter wavelengths this effect is confined to the extreme limb but at 25 a it extends inward from the limb to cos 0 = 0.3. Observations of I(a)/I(1.0) were made with the McMath Solar Telescope through atmospheric windows at 10.4, 17.9, 20.4, and 24.2 microns, respectively. The measurements, after having been smoothed, are compared with the theoretical predictions taking into account the diffraction pattern of the telescope. The expected brightening does not appear.

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