Vertical Dynamics of the Energy Release Process in a Simple two-Ribbon Flare

摘要: Observations of the quiescent filament eruption and spotless two-ribbon flare 12 September 2000 are presented. A simple morphology, large spatial scales, a suitable viewing angle provide insight into characteristics energy release process which is attributed to reconnection in current sheet formed below eruptive filament. The ribbons appeared started expand laterally while was still recognizable, enabling simultaneous measurements ribbon separation w height lower edge filament, h. ratio w/h estimated for expanding portions indicates that width-to-length at onset fast ranges between $$\frac{1}{18}$$ $$\frac{1}{9}$$ . elements characterized by w/h> $$\frac{1}{6}$$ remained stationary. Nancay radioheliograph data decimeter–meter wavelengths show one group radio bursts ahead (moving type IV burst) another behind centroids sources were confined region outlined magnetic inversion line, suggestive emission from sheet. Sources preferably located close some line. Two possible explanations discussed: terms fast-mode bow shocks outflow jets, multiple tearing subsequent coalescence plasmoids.