Failed Solar Eruption of A Multi-thermal Flux Rope
Leping Li, Hongqiang Song, Hardi Peter, Lakshmi Pradeep Chitta

TL;DR
This study reports the observation of a multi-thermal magnetic flux rope undergoing a failed eruption, revealing the coexistence and dynamics of hot and warm plasma components during the event.
Contribution
It provides the first detailed observation of a multi-thermal flux rope with both hot and warm plasma, demonstrating their simultaneous failed eruption and complex evolution.
Findings
Both hot and warm channels twisted together, forming the same flux rope.
Failed eruption of both channels with rotation and disappearance.
Formation of current sheets and a flare during the eruption.
Abstract
A magnetic flux rope (FR), hosting hot plasma, is thought to be central to the physics of coronal mass ejection. Such FRs are widely observed with passbands of the Atmospheric Imaging Assembly (AIA) onboard the Solar Dynamics Observatory (SDO), that are sensitive to emission from the hot plasma around 10 MK. In contrast, observations of warmer (around 1 MK) counterparts of FRs are sparse. In this study, we report the failed eruption of a multi-thermal FR, hosting both hot and warm plasma. On 2015 May 1, a hot channel appeared in the AIA high temperature passbands out of the southeastern solar limb to the south of a nearby flare, and then erupted outward. During the eruption, it rotated perpendicular to the erupting direction. The hot channel stopped erupting, and disappeared gradually, showing a failed eruption. During the hot channel eruption, a warm channel appeared sequentially in…
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