✦ LIBER ✦

Radioheliograph observations of a pulsating structure associated with a moving type IV burst

✍ Scribed by M. Pick; G. Trottet

Publisher: Springer
Year: 1978
Tongue: English
Weight: 316 KB
Volume: 60
Category: Article
ISSN: 0038-0938
DOI: 10.1007/bf00156535

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✦ Synopsis

Observations of a pulsating structure with the Mark II Nan~ay Radioheliograph are reported. These fluctuations are found to occur early in the development of a moving type IV burst. It is confirmed that the source of these fluctuations is of small extent and that it is embedded in the moving type IV continuum, plausibly at the top of an expanding arch.

The observations suggest that the pulsating structure consists of recurrent enhanced pulses (mean recurrency time 1.7 s) followed by trains of periodic pulses (mean periodicity 0.37 s). The intensity of the enhanced pulses has a damping time of about 5 s. It is shown that previous interpretation of the pulsating structure by Rosenberg (1970) cannot account for the present observations.

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