engleski

Correlations between properties of type II bursts and associated flares

Relations between characteristics of metric type II bursts and the associated microwave bursts are investigated to test the model of the shock wave formation via a flare ignited blast. It is found that the time delay of the type II burst start after the onset of the microwave burst is shorter for a more powerful microwave burst. A considerably lower correlation coefficient is found for the microwave burst impulsiveness. The starting frequency of a type II burst increases with the microwave burst impulsiveness. The instantaneous relative bandwidths and the propagation velocities are positively correlated, and are larger when associated with stronger microwave bursts. All of the obtained correlations are fully consistent with the flare ignited blast wave scenario for the shock wave formation.

flares - shock waves - type II bursts

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