✦ LIBER ✦

The starting frequencies of type III bursts

✍ Scribed by J. McKim Malville

Publisher: Springer
Year: 1967
Tongue: English
Weight: 393 KB
Volume: 2
Category: Article
ISSN: 0038-0938
DOI: 10.1007/bf00146495

No coin nor oath required. For personal study only.

✦ Synopsis

During the period 1960 to 1966 the monthly averages of the starting frequencies of type II[ bursts declined with the level of solar activity and reached a minimum near the minimum of the solar cycle in 1964. The electron densities corresponding to the observed starting frequencies are close to those expected at the base of the K corona. It is shown that sufficient free-free absorption may occur in the corona above the appropriate plasma levels to account for the observed behavior of the starting frequencies of the bursts. The daily variation in the starting frequencies is attributed to structural variation of the inner corona. Quiescent prominences may be responsible for establishing periods of anomalously low-starting frequencies.

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