✦ LIBER ✦

The prevalence of second harmonic radiation in type III bursts observed at kilometric wavelengths

✍ Scribed by F. T. Haddock; Hector Alvarez

Publisher: Springer
Year: 1973
Tongue: English
Weight: 696 KB
Volume: 29
Category: Article
ISSN: 0038-0938
DOI: 10.1007/bf00153448

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✦ Synopsis

We present the analysis of 64 type III solar bursts that drifted from 3.5 MHz down to the range 350-50 kHz between March 1968 and February 1970. Bursts arrival times were predicted by a simple model and then compared with observations. The results show that, as the bursts drift, the fundamental often disappears below a certain frequency range while the second harmonic remains. Below about 1 MHz the second harmonic occurrence predominates, Recognizing this fact we deduce a mean velocity of 0.32c • for the exciter particles, where the uncertainty is the standard error and c the velocity of light in vacuum; the electron density model used is comparable to a solar wind model.

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