๐”– Bobbio Scriptorium
โœฆ   LIBER   โœฆ

The quiet sun brightness temperature at 408 MHz

โœ Scribed by Y. Avignon; P. Lantos; F. Palagi; P. Patriarchi


Publisher
Springer
Year
1975
Tongue
English
Weight
235 KB
Volume
45
Category
Article
ISSN
0038-0938

No coin nor oath required. For personal study only.

โœฆ Synopsis


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 coronal holes across the disk of the Sun.


๐Ÿ“œ SIMILAR VOLUMES


Brightness temperatures of the quiet sun
โœ E. E. Reber ๐Ÿ“‚ Article ๐Ÿ“… 1971 ๐Ÿ› Springer ๐ŸŒ English โš– 613 KB

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

Comments on the quiet Sun brightness dis
โœ M. R. Kundu; Sou-Yang Liu ๐Ÿ“‚ Article ๐Ÿ“… 1975 ๐Ÿ› Springer ๐ŸŒ English โš– 215 KB

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.

Coronal X-ray holes and the quiet radio
โœ Arthur E. Covington ๐Ÿ“‚ Article ๐Ÿ“… 1977 ๐Ÿ› Springer ๐ŸŒ English โš– 525 KB

Radio cool regions observed on strip scans of the Sun made at 2800 MHz with a 1.5 rnin arc fan beam are associated with X-ray coronal holes and are used to derive lower envelopes which are similar to spotless Sun drift curves. Fluxes are evaluated from the Ottawa-ARO solar patrol;.e.g, that of Coron

The 3.3-mm brightness distribution of th
โœ F. I. Shimabukuro ๐Ÿ“‚ Article ๐Ÿ“… 1970 ๐Ÿ› Springer ๐ŸŒ English โš– 401 KB

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 a