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Solar radio pulsations at decametric wavelengths

โœ Scribed by A. Achong


Publisher
Springer
Year
1974
Tongue
English
Weight
352 KB
Volume
37
Category
Article
ISSN
0038-0938

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โœฆ Synopsis


Quasi-periodic solar emission has been observed with a radio spectrograph operating at 18-28 MHz during weak decametric continuum on August 22, 1972. The continuum activity was observed simultaneously on fixed frequency receivers at 18 MHz and at 26 MHz. The pulsations showed a mean period of 4 s and a sharp low-frequency cut-off at 24 MHz. Spectral characteristics of these and similar pulsations observed by other workers are examined and shown to be consistent with an interpretation based on an oscillating magnetic flux tube in the solar corona.


๐Ÿ“œ SIMILAR VOLUMES


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โœ B. L. Gotwols ๐Ÿ“‚ Article ๐Ÿ“… 1972 ๐Ÿ› Springer ๐ŸŒ English โš– 644 KB

Observations are reported of radio-pulsations at din-wavelengths. The pulsations are quasiperiodic with a period of 0.5 s, they have a bandwidth > 300 MHz and show up to a 50 ~ enhancement of the underlying type IV continuum.

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Type-lIIb, l lid, and III solar decametric radio bursts, being distinguished by the typical negative drift rate of their dynamic spectra, are compared. Observational data were obtained with a UTR-2 antenna during the period 1973-1982. During the analysis of the bursts of all these spectral varieties