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Evolution of Magnetic Helicity During Eruptive Flares and Coronal Mass Ejections View all abstracts by submitter

Eric R Priest   Submitted: 2016-08-16 09:00

During eruptive solar flares and coronal mass ejections, a non-pot{\-}ential magnetic arcade with much excess magnetic energy goes unstable and reconnects. It produces a twisted erupting flux rope and leaves behind a sheared arcade of hot coronal loops. We suggest that: the twist of the erupting flux rope can be determined from conservation of magnetic flux and magnetic helicity and equipartition of magnetic helicity. It depends on the geometry of the initial pre-eruptive structure. Two cases are considered, in the first of which a flux rope is not present initially but is created during the eruption by the reconnection. In the second case, a flux rope is present under the arcade in the pre-eruptive state, and the effect of the eruption and reconnection is to add an amount of magnetic helicity that depends on the fluxes of the rope and arcade and the geometry.

Authors: Eric Priest, Dana Longcope and Miho Janvier
Projects: None

Publication Status: in press
Last Modified: 2016-08-16 10:26
Go to main E-Print page  Miniature X-ray Solar Spectrometer (MinXSS) -- A Science-Oriented, University 3U CubeSat  Comparison of damped oscillations in solar and stellar X-ray  flares  Edit Entry  Download Preprint  Submitter's Homepage Delete Entry 

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