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Eruption of a Kink-Unstable Filament in Active Region NOAA 10696

D. R. Williams·T. Toeroek·P. Demoulin·L. van Driel-Gesztelyi·B. Kliem
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Abstract

We present rapid-cadence Transition Region And Coronal Explorer (TRACE) observations which show evidence of a filament eruption from active region NOAA 10696, accompanied by an X2.5 flare, on 2004 November 10. The eruptive filament, which manifests as a fast coronal mass ejection some minutes later, rises as a kinking structure with an apparently exponential growth of height within TRACE's field of view. We compare the characteristics of this filament eruption with MHD numerical simulations of a kink-unstable magnetic flux rope, finding excellent qualitative agreement. We suggest that, while tether weakening by breakout-like quadrupolar reconnection may be the release mechanism for the previously confined flux rope, the driver of the expansion is most likely the MHD helical kink instability.

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D. R. Williams, T. Toeroek, P. Demoulin, L. van Driel-Gesztelyi, B. Kliem. 2005-07-28. Eruption of a Kink-Unstable Filament in Active Region NOAA 10696. https://doi.org/10.1086/432910

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