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A revised graduated cylindrical shell model and its application to a prominence eruption View all abstracts by submitter

Qingmin Zhang   Submitted: 2023-07-18 20:28

In this paper, the well-known graduated cylindrical shell (GCS) model is slightly revised by introducing longitudinal and latitudinal deflections of prominences originating from ARs. Subsequently, it is applied to 3D reconstruction of an eruptive prominence in AR 13110, which produced an M1.7 class flare and a fast CME on 2022 September 23. It is revealed that the prominence undergoes acceleration from ~246 to ~708 km s-1. Meanwhile, the prominence experiences southward deflection by 15±1 degree without longitudinal deflection, suggesting that the prominence erupts non-radially. Southward deflections of the prominence and associated CME are consistent, validating the results of fitting using the revised GCS model. Besides, the true speed of the CME is calculated to be 1637±15 km s-1, which is ~2.3 times higher than that of prominence. This is indicative of continuing acceleration of the prominence during which flare magnetic reconnection reaches maximum beneath the erupting prominence. Hence, the reconstruction using the revised GCS model could successfully track a prominence in its early phase of evolution, including acceleration and deflection.

Authors: Qing-Min Zhang, Zhen-Yong Hou, Xian-Yong Bai
Projects: SDO-AIA

Publication Status: accepted for publication in RAA
Last Modified: 2023-07-19 13:10
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