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Solar active regions at 9 and 3.5 mm wavelengths under disturbed conditions

โœ Scribed by M. R. Kundu; Sou-Yang Liu

Publisher
Springer
Year
1973
Tongue
English
Weight
374 KB
Volume
29
Category
Article
ISSN
0038-0938

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โœฆ Synopsis

Some properties of solar active regions at 9 and 3.5 mm wavelengths under disturbed conditions are discussed. New regions develop or weak regions intensify at millimeter wavelengths as a result of flares at distant sites. The spectra of the peak flux density of moderately strong bursts observed at 9 nun show a sharp drop toward the shorter millimeter wavelengths. The weak bursts at 3.5 mm manifest mainly as heating phenomena.

๐Ÿ“œ SIMILAR VOLUMES

Polarization of solar active regions at
Polarization of solar active regions at 3.5 millimeter wavelength
โœ M. R. Kundu; T. Gergely ๐Ÿ“‚ Article ๐Ÿ“… 1973 ๐Ÿ› Springer ๐ŸŒ English โš– 432 KB

A study of the circular polarization structure of solar active regions has been made from data obtained at 3.5 mm wavelength, using the 36 ft diameter radio telescope of the National Radio Astronomy Observatory at Kitt Peak, Arizona. The angular resolution of the telescope at this wavelength is 1:2.

Fine structure of a solar active region
Fine structure of a solar active region at 3.7 and 11.1 cm wavelengths
โœ M. R. Kundu; R. H. Becker; T. Velusamy ๐Ÿ“‚ Article ๐Ÿ“… 1974 ๐Ÿ› Springer ๐ŸŒ English โš– 698 KB

The three-element interferometer of the National Radio Astronomy Observatory was used to observe the Sun at 3.7 and 11.1 cm wavelengths during the period June 5-9, 1973. The baselines of the interferometer were 900, 1800 and 2700 meters, with maximum angular resolution of 3" at 3.7 and 9" at 11.1 cm