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Eruption of a kink-unstable filament in active region NOAA 10696  

David R. Williams   Submitted: 2005-06-23 05:19

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.

Authors: David R. Williams, Tibor Török, Pascal Démoulin, Lidia van Driel-Gesztelyi, Bernhard Kliem
Projects: Soho-EIT,Soho-MDI,TRACE

Publication Status: ApJ Letters (accepted)
Last Modified: 2005-06-23 05:19
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Eruption of a kink-unstable filament in active region NOAA 10696

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