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Plasma evolution within an erupting coronal cavity View all abstracts by submitter

David Long   Submitted: 2018-02-08 04:35

Coronal cavities have previously been observed associated with long-lived quiescent filaments and are thought to correspond to the associated magnetic flux rope. Although the standard flare model predicts a coronal cavity corresponding to the erupting flux rope, these have only been observed using broadband imaging data, restricting analysis to the plane-of-sky. We present a unique set of spectroscopic observations of an active region filament seen erupting at the solar limb in the extreme ultraviolet (EUV). The cavity erupted and expanded rapidly, with the change in rise phase contemporaneous with an increase in non-thermal electron energy flux of the associated flare. Hot and cool filamentary material was observed to rise with the erupting flux rope, disappearing suddenly as the cavity appeared. Although strongly blue-shifted plasma continued to be observed flowing from the apex of the erupting flux rope, this outflow soon ceased. These results indicate that the sudden injection of energy from the flare beneath forced the rapid eruption and expansion of the flux rope, driving strong plasma flows which resulted in the eruption of an under-dense filamentary flux rope.

Authors: David M. Long, Louise K. Harra, Sarah A. Matthews, Harry P. Warren, Kyoung-Sun Lee, George Doschek, Hirohisa Hara, Jack M. Jenkins
Projects: Hinode/EIS,SDO-AIA

Publication Status: Accepted in ApJ
Last Modified: 2018-02-08 16:19
Go to main E-Print page  Diffusive transport of energetic electrons in the solar corona: X-ray and radio diagnotics  Identification of multiple hard X-ray sources in solar flares: A Bayesian analysis of the February 20 2002 event  Edit Entry  Download Preprint  Submitter's Homepage Delete Entry 

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