Using BBSO Hα images and TRACE data, we have studied a prominence eruption occurred on July 19th, 2000, in active region 9077, at the west limb of the Sun. We have followed the morphological evolution of the prominence several hours before its activation and during the eruption phase, in different atmospheric layers. In particular, TRACE images showed that the prominence had a helical-like structure and that its motion towards higher atmospheric layers was characterized by a non-linear behaviour. We approximated the prominence as a cylindrical flux tube and estimated the evolution of the twist of the prominence magnetic field and the behaviour of the rise speed during different phases. Taking into account the forces acting on the prominence, we determined the decrease of the axial electric current and the rate of mass loss of the prominence....
Development of a filament eruption during a solar flare
Zuccarello, F.
2002-01-01
Abstract
Using BBSO Hα images and TRACE data, we have studied a prominence eruption occurred on July 19th, 2000, in active region 9077, at the west limb of the Sun. We have followed the morphological evolution of the prominence several hours before its activation and during the eruption phase, in different atmospheric layers. In particular, TRACE images showed that the prominence had a helical-like structure and that its motion towards higher atmospheric layers was characterized by a non-linear behaviour. We approximated the prominence as a cylindrical flux tube and estimated the evolution of the twist of the prominence magnetic field and the behaviour of the rise speed during different phases. Taking into account the forces acting on the prominence, we determined the decrease of the axial electric current and the rate of mass loss of the prominence....I documenti in IRIS sono protetti da copyright e tutti i diritti sono riservati, salvo diversa indicazione.
