Association between solar soft X-ray flares and microwave bursts.

Astronomy and Astrophysics – Astrophysics

Scientific paper

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Scientific paper

A statistical analysis of the appropriate physical parameters of solar soft X-ray (SXR) flares and microwave bursts originating in four larger active regions in 1989 shows that their correlation coefficient R reach 0.9 ≤ R < 1. This fact indicates that there is a close association between SXR flares and microwave bursts. Such result can be interpreted by the physical process that a strong enough nonthermal electron beam injected downward from the microwave source into the chromosphere is able to cause the chromospheric evaporation due to collision heating, the evaporated chromospheric plasma with superhot temperature moves upwards along the flare loop and emits SXR radiation.

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