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Fine-scale Structures of Flux Ropes Tracked by Erupting Material View all abstracts by submitter

Ting Li   Submitted: 2013-05-12 23:12

We present the Solar Dynamics Observatory observations of two flux ropes respectively tracked out by material from a surge and a failed filament eruption on 2012 July 29 and August 04. For the first event, the interaction between the erupting surge and a loop-shaped filament in the east seems to ``peel off'' the filament and add bright mass into the flux rope body. The second event is associated with a C-class flare that occurs several minutes before the filament activation. The two flux ropes are respectively composed of 85pm12 and 102pm15 fine-scale structures, with an average width of about 1arcsec.6. Our observations show that two extreme ends of the flux rope are rooted in the opposite polarity fields and each end is composed of multiple footpoints (FPs) of the fine-scale structures. The FPs of the fine-scale structures are located at network magnetic fields, with magnetic fluxes from 5.6 imes1018 Mx to 8.6 imes1019 Mx. Moreover, almost half of the FPs show converging motion of smaller magnetic structures over 10 hr before the appearance of the flux rope. By calculating the magnetic fields of the FPs, we deduce that the two flux ropes occupy at least 4.3 imes1020 Mx and 7.6 imes1020 Mx magnetic fluxes, respectively.

Authors: Ting Li & Jun Zhang
Projects: SDO-AIA

Publication Status: 14 pages,5 figures, ApJL (accepted)
Last Modified: 2013-05-13 10:03
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