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- W4285403860 abstract "Abstract In this paper, through analyzing data from the Solar Dynamics Observatory (SDO) and the Global Oscillation Network Group (GONG), we present a study on the formation of a double-decker filament in NOAA Active Region 12665 from 2017 July 8 to 14. We find that magnetic reconnection occurs between two smaller filaments to form a longer filament. According to the evolution of the leading sunspot, it is obvious that the sunspot experiences a continuous rotation around its umbra. During the period from 03:00 UT on July 11 to 10:00 UT on July 14, the average speed of sunspot rotation is about 3.°7 hr –1 . The continuous rotation of sunspot stretches the filament and results in the formation of a reversed S-shaped filament. Due to the motion of the magnetic field and internal magnetic reconnection, the filament splits into two branches and forms a double-decker filament structure. In the process of filament separation, internal magnetic reconnection can also accelerate the filament separation. Nonlinear force-free field extrapolation indicates that there are two magnetic flux ropes, which are consistent with the observed results. Eventually, the upper filament erupts and produces an M-class flare and a halo coronal mass ejection." @default.
- W4285403860 created "2022-07-14" @default.
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- W4285403860 date "2022-07-01" @default.
- W4285403860 modified "2023-10-14" @default.
- W4285403860 title "A Double-decker Filament Formation Driven by Sunspot Rotation and Magnetic Reconnection" @default.
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- W4285403860 doi "https://doi.org/10.3847/1538-4357/ac7391" @default.
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