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Rapid Rotation of an Erupting Prominence and the Associated Coronal Mass Ejection on 13 May 2013 View all abstracts by submitter

Qingmin Zhang   Submitted: 2023-02-01 20:53

In this paper, we report the multiwavelength observations of an erupting prominence and the associated CME on 13 May 2013. The event occurs behind the western limb in the field of view of SDO/AIA. The prominence is supported by a highly twisted magnetic flux rope and shows rapid rotation in the counterclockwise direction during the rising motion. The rotation of the prominence lasts for ~47 minutes. The average period, angular speed, and linear speed are ~806 s, ~0.46 rad/min, and ~355 km s-1, respectively. The total twist angle reaches ~7π, which is considerably larger than the threshold for kink instability. Writhing motion during 17:42-17:46 UT is clearly observed by SWAP in 174 Å and STEREO-B/EUVI in 304 Å after reaching an apparent height of ~405 Mm. Therefore, the prominence eruption is most probably triggered by kink instability. A pair of conjugate flare ribbons and post-flare loops are created and observed by STA/EUVI. The onset time of writhing motion is consistent with the commencement of the impulsive phase of the related flare. The 3D morphology and positions of the associated CME are derived using the graduated cylindrical shell (GCS) modeling. The kinetic evolution of the reconstructed CME is divided into a slow-rise phase and a fast-rise phase by the writhing motion. The edge-on angular width of the CME is a constant (60 degree), while the face-on angular width increases from 96 to 114 degree, indicating a lateral expansion. The latitude of the CME source region decreases slightly from 18 to 13 degree, implying an equatorward deflection during propagation.

Authors: Yuhao Zhou, Haisheng Ji, Qingmin Zhang
Projects: SoHO-LASCO

Publication Status: accepted for publication in Solar Physics
Last Modified: 2023-02-04 18:51
Go to main E-Print page  Prospects of Detecting Non-thermal Protons in Solar Flares via Lyman Line Spectroscopy: Revisiting the Orrall-Zirker Effect  Spectral and Imaging Diagnostics of Spatially-Extended Turbulent Electron Acceleration and Transport in Solar Flares  Edit Entry  Download Preprint  Submitter's Homepage Delete Entry 

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