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Evolutional Features of Solar Microwave Type IV Bursts
Kai, K.
Proceedings of the Astronomical Society of Australia, Volume 1, Issue 2, pp. 49-51
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Large outbursts from the Sun which are widely extended over centimetre and decimetre ranges and show smooth time variations in intensity have been called microwave type IV bursts (mu-IV). Those bursts generally consist of more than two successive components, the spectra of which move progressively towards the lower frequencies. Furthermore there is a tendency for the decay times, which are defined as the times occupied by the decreasing parts of the bursts, to become successively longer. It seems worth while to make a quantitative study of the time variation of the decay times and flux densities of mu-IV burst spectra and to infer how the physical conditions in the source change with time.

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