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The 3.3-mm brightness distribution of the quiet sun

โœ Scribed by F. I. Shimabukuro

Publisher
Springer
Year
1970
Tongue
English
Weight
401 KB
Volume
12
Category
Article
ISSN
0038-0938

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โœฆ Synopsis

Center-to-limb brightncss distribution measurements of the quiet Sun at a wavelength of 3.3 mm show that there is a slight limb brightening at this wavelength. Within the measurement accuracy of the system used, the limb brightening function is only radially dependent. At 3.3 mm, the measuremcn ts are consistent with a solar brightncss curve that is flat to about r--0.8 with a rapid increase to a peak value of about 1.3 at the limb. The results show that most of the central disk 3.3-mm emission comes from a thin laycr of relatively constant temperature about 1500-3500 km above the photosphere.

๐Ÿ“œ SIMILAR VOLUMES

Comments on the quiet Sun brightness dis
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A re-analysis of the brightness distribution of the quiet Sun at 1.2 mm wavelength is made. It is concluded that there is no evidence for uniform or limb-brightened distribution at this wavelength. \* NAS-NRC Research Associate on sabbatical leave from the University of Maryland.

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Absolute brightness temperatures and brightness temperature ratios of a quiet region near the center of the solar disk and the central region of the new moon were measured simultaneously at the 6 mm wavelength. The measured quiet sun/new moon brightness temperature ratios and reported central bright

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โœ Y. Avignon; P. Lantos; F. Palagi; P. Patriarchi ๐Ÿ“‚ Article ๐Ÿ“… 1975 ๐Ÿ› Springer ๐ŸŒ English โš– 235 KB

The flux of the radio quiet Sun and the brightness temperature at 408 MHz (73 cm) are derived from measurements with the E-W Nangay interferomcter and the E-W arm of the Medicina North Cross. It is shown that the lowest envelopes, which defined the radio quiet Sun, correspond to transits of extended