Pulsation of dark filaments as mechanism of homologous flares

Astronomy and Astrophysics – Astrophysics

Scientific paper

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H Alpha Line, Solar Flares, Solar Magnetic Field, Solar Oscillations, Solar Prominences, Homology, Magnetic Flux, Plasma Pinch

Scientific paper

The H-alpha morphology of the series of homologous flares of July 12, 1982 is analyzed and found a close connection between the morphological changes in a dark filament and the repeated eruption of the flares, namely, pulsation of dark filaments modulates the repeated eruptions. It is believed that newly emerging flux of a pulsating type in the vicinity of dark filaments can give rise to dynamic pinches of the filament plasma, causing the repeated flare eruptions. The theoretical calculation agrees well with the observed results.

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