Dynamics evolution of a solar active-region filament from quasi-static state to eruption: rolling motion, untwisting motion, material transfer, and chirality

Abstract

To better understand magnetic structure and eruptive process of solar filaments, a solar active-region filament (labeled F2) eruption associated with a B-class flare was investigated by using high-resolution H$\alpha$ data from the 1 m New Vacuum Solar Telescope (NVST), combined with EUV observations of the Solar Dynamical Observatory (SDO). The filament F2 was disturbed by another filament (labeled F1) eruption that experienced a whip-like motion. Before the filament F2 eruption, the Dopplergrams show that the southern and the northern parts of the filament F2 body exhibit blueshift and redshift along the filament spine, simultaneously. It implies that the filament F2 was rolling from one side to the other. During the filament F2 eruption, the Doppler velocity shifts of the filament body are opposite to that before its eruption. It demonstrates that the filament body exhibits an untwisting motion, which can be also identified by tracing the movement of the eruptive filament threads. Moreover, it is found that the material of the filament F2 was transferred to the surrounding magnetic field loops, which is caused by magnetic reconnection between the filament F2 and the surrounding magnetic loops. According to the right-bearing threads of the filament F2 before its eruption, it can be deduced that the filament F2 is initially supported by a sheared arcade. The following observations reveal that the twisted magnetic structure of the filament F2 formed in the eruption phase.

arXiv comment16 pages, 7 figures, accepted for publication in ApJ

References in corpus (27)

• Physics of Solar Prominences: II - Magnetic Structure and Dynamics
• A model for magnetically coupled sympathetic eruptions
• Formation and plasma circulation of solar prominences
• Magnetic reconnection between a solar filament and nearby coronal loops
• Imaging and Spectroscopic Observations of a Filament Channel and the Implications for the Nature of Counter-streamings
• Chirality and Magnetic Configurations of Solar Filaments
• Drifting of the line-tied footpoints of CME flux-ropes
• A Time Series of Filament Eruptions Observed by Three Eyes from Space: From Failed to Successful Eruptions
• Nonlinear Force-Free Field Extrapolation of a Coronal Magnetic Flux Rope Supporting a Large-Scale Filament from Photospheric Vector Magnetogram
• Reconnection of a kinking flux rope triggering the ejection of a microwave and hard X-ray source. II. Numerical Modeling
• New Vacuum Solar Telescope observations of a flux rope tracked by a filament activation
• Magnetic Flux Cancelation as the Buildup and Trigger Mechanism for CME-Producing Eruptions in two Small Active Regions
• Unwinding motion of a twisted active-region filament
• The formation of an inverse S-shaped active-region filament driven by sunspot motion and magnetic reconnection
• Triggering mechanism and material transfer of a failed solar filament eruption
• Double-Decker Filament Configuration Revealed by Mass Motions
• Unambiguous Evidence of Filament Splitting-Induced Partial Eruptions
• Is flux rope a necessary condition for the progenitor of coronal mass ejections?
• Kink instability evidenced by analyzing the leg rotation of a filament
• A Statistical Study of Solar Filament Eruptions That Forms High-Speed Coronal Mass Ejections
• Measurements of plasma motions in dynamic fibrils
• External reconnection and resultant reconfiguration of overlying magnetic fields during sympathetic eruptions of two filaments
• Filament Eruption and Its Reformation Caused by Emerging Magnetic Flux
• Eruption of Solar Magnetic Flux Ropes Caused by Flux Feeding
• The Formation of a Small-scale Filament after Flux Emergence on the Quiet Sun
• Untwisting and Disintegration of a Solar Filament Associated with Photospheric Flux Cancellation
• Twisting/Swirling Motions During a Prominence Eruption as seen from SDO/AIA

Cited by in corpus (6)

• Observation and Modeling of Solar Jets
• Direct Observation of A Large-scale CME Flux Rope Event Arising from an Unwinding Coronal Jet
• Rapid Rotation of an Erupting Prominence and the Associated Coronal Mass Ejection on 13 May 2013
• Grow-up of a Filament Channel by Intermittent Small-scale Magnetic Reconnection
• Multi-wavelength and Dual-perspective Observations of Eruption and Untwisting of Two Homologous Magnetic Flux Ropes
• Insights into the Kinematic Evolution of Filament-Induced Jets: Coupling of Interchange and Flare Reconnection