Role of rigid rotation in the sudden disappearance of solar filaments

Astronomy and Astrophysics – Astrophysics

Scientific paper

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Solar Corona, Solar Prominences, Solar Rotation, Extreme Ultraviolet Radiation, H Alpha Line, Solar X-Rays

Scientific paper

A relation has been established between temporary 'disparition brusque' (DB) of quiescent filaments and the presence of pivot-points (rigid rotation). The disappearance of filaments without pivot-point however, is final. Statistical analysis shows that more than 70 percent of filament DBs follow this rule. A few examples are given of filament DBs observed in EUV, X-ray and H-alpha light. These show that, in a temporary DB, the filament remains visible at high temperatures, which allows the conclusion that temporary DBs are thermal DBs.

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