Witnessing tether-cutting reconnection at the onset of a partial eruption
arXiv:1811.01606 · doi:10.3847/1538-4357/aaead1
Abstract
In this paper, we study the onset process of a solar eruption on 21 February 2015, focusing on its unambiguous precursor phase. With multi-wavelength imaging observations from the Atmospheric Imaging Assembly (AIA), definitive tether-cutting (TC) reconnection signatures, i.e., flux convergence and cancellation, bidirectional jets, as well as topology change of hot loops, were clearly observed below the pre-eruption filament. As TC reconnection progressed between the sheared arcades that enveloped the filament, a channel-like magnetic flux rope (MFR) arose in multi-wavelength AIA passbands wrapping around the main axis of the filament. With the subsequent ascent of the newborn MFR, the filament surprisingly split into three branches. After a 7-hour slow rise phase, the high-lying branch containing by the MFR abruptly accelerated causing a two-ribbon flare; while the two low-lying branches remained stable forming a partial eruption. Complemented by kinematic analysis and decay index calculation, we conclude that TC reconnection played a key role in building up the eruptive MFR and triggering its slow rise. The onset of the torus instability may have led the high-lying branch into the standard eruption scenario in the fashion of a catastrophe.
arXiv comment9 figures
References in corpus (53)
- A Model for Solar Coronal Mass Ejections
- Torus instability
- Physics of Solar Prominences: II - Magnetic Structure and Dynamics
- Ideal kink instability of a magnetic loop equilibrium
- Observation of An Evolving Magnetic Flux Rope Prior To and During A Solar Eruption
- Properties of Ground Level Enhancement Events and the Associated Solar Eruptions during Solar Cycle 23
- Criteria for Flux Rope Eruption: Non Equilibrium versus Torus Instability
- Observing Flux Rope Formation During the Impulsive Phase of a Solar Eruption
- How Many CMEs Have Flux Ropes? Deciphering the Signatures of Shocks, Flux Ropes, and Prominences in Coronagraph Observations of CMEs
- Photospheric flux cancellation and associated flux rope formation and eruption
- Direct Evidence for a Fast CME Driven by the Prior Formation and Subsequent Destabilization of a Magnetic Flux Rope
- Solar filament eruptions and their physical role in triggering Coronal Mass Ejections
- Slow Rise and Partial Eruption of a Double-Decker Filament. I Observations and Interpretation
- Sigmoid-to-Flux-Rope Transition Leading to A Loop-Like Coronal Mass Ejection
- Simultaneous observation of a flux rope eruption and magnetic reconnection during an X-class solar flare
- Imaging and Spectroscopic Observations of a Filament Channel and the Implications for the Nature of Counter-streamings
- Catastrophe versus instability for the eruption of a toroidal solar magnetic flux rope
- A Chain of Winking (Oscillating) Filaments Triggered by an Invisible Extreme-Ultraviolet Wave
- Formation of Magnetic Flux Ropes during Confined Flaring Well Before the Onset of a Pair of Major Coronal Mass Ejections
- On a solar blowout jet: driven mechanism and the formation of cool and hot components
- On the Relationship Between a Hot-channel-like Solar Magnetic Flux Rope and its embedded Prominence
- Magnetic Flux Cancelation as the Trigger of Solar Coronal-Hole Coronal Jets
- Slow Rise and Partial Eruption of a Double-Decker Filament. II. Modeling by a Double Flux Rope Equilibrium
- Prominence Formation Associated with an Emerging Helical Flux Rope
- Tracking the Evolution of A Coherent Magnetic Flux Rope Continuously from the Inner to the Outer Corona
- Coronal mass ejection initiation: On the nature of the Flux Cancellation Model
- Direct Observations of Tether-cutting Reconnection During a Major Solar Event From 2014 February 24 to 25
- Simultaneous Observations of a Large-Scale Wave Event in the Solar Atmosphere: From Photosphere to Corona
- New Vacuum Solar Telescope observations of a flux rope tracked by a filament activation
- Direct observations of magnetic flux rope formation during a solar coronal mass ejection
- Magnetic fields of an active region filament from full Stokes analysis of Si I 1082.7 nm and He I 1083.0 nm
- Helical Kink Instability in a Confined Solar Eruption
- Evidence for Solar Tether-cutting Magnetic Reconnection from Coronal Field Extrapolations
- Flux cancellation and the evolution of the eruptive filament of 2011 June 7
- Magnetic Flux Cancelation as the Buildup and Trigger Mechanism for CME-Producing Eruptions in two Small Active Regions
- Formation and eruption of a flux rope from the sigmoid active region NOAA 11719 and associated M6.5 flare: A multi-wavelength study
- Tether-cutting Reconnection between Two Solar Filaments Triggering Outflows and a Coronal Mass Ejection
- Partial eruption of a filament with twisting nonuniform fields
- SDO/AIA Observations of a Partially Erupting Prominence
- Unambiguous Evidence of Filament Splitting-Induced Partial Eruptions
- Is flux rope a necessary condition for the progenitor of coronal mass ejections?
- The eruption of a small-scale emerging flux rope as the driver of an M-class flare and a coronal mass ejection
- Large-amplitude longitudinal oscillations in a solar filament
- Fine-scale Structures of Flux Ropes Tracked by Erupting Material
- The role of flux cancellation in eruptions from bipolar active regions
- Determining the Magnetic Field Orientation of Coronal Mass Ejections from Faraday Rotation
- Formation and Eruption of a Double-decker Filament Triggered by Micro-bursts and Recurrent Jets in the Filament Channel
- Observational Evidence of Magnetic Reconnection Associated with Magnetic Flux Cancellation
- The Triggering of the 29-March-2014 Filament Eruption
- Prominence eruption initiated by helical kink-instability of an embedded flux rope
- The Formation of a Small-scale Filament after Flux Emergence on the Quiet Sun
- Two Types of Long-duration Quasi-static Evolution of Solar Filaments
- Twisting/Swirling Motions During a Prominence Eruption as seen from SDO/AIA
Cited by in corpus (18)
- Some interesting topics provoked by the solar filament research in the past decade
- Triggering mechanism and material transfer of a failed solar filament eruption
- Observational Analysis on the Early Evolution of a CME Flux-rope: Pre-flare reconnection and Flux-rope's Footpoint Drift
- Coronal Condensation as the Source of Transition Region Supersonic Downflows above a Sunspot
- Pre-flare processes, flux rope activation, large-scale eruption and associated X-class flare from the active region NOAA 11875
- Sympathetic Filament Eruptions within a Fan-spine Magnetic System
- Filament Eruption and Its Reformation Caused by Emerging Magnetic Flux
- Formation of a Solar Filament by Magnetic Reconnection and Associated Chromospheric Evaporation and Subsequent Coronal Condensation
- Eruptive-Impulsive Homologous M-class Flares Associated with Double-Decker Flux Rope Configuration in Mini-Sigmoid of NOAA 12673
- Direct Observation of A Large-scale CME Flux Rope Event Arising from an Unwinding Coronal Jet
- A partial filament eruption in three steps induced by external magnetic reconnection
- Reconfiguration and eruption of a solar filament by magnetic reconnection with an emerging magnetic field
- Eruptions and Flaring Activity in Emerging Quadrupolar Regions
- Formation of a solar filament by magnetic reconnection and coronal condensation
- Untwisting and Disintegration of a Solar Filament Associated with Photospheric Flux Cancellation
- Eruption of EUV Hot-Channel near Solar Limb and Associated Moving Type-IV Radio Burst
- High-resolution spectroscopy of an erupting minifilament and its impact on the nearby chromosphere
- Analysis of the Evolution of a Multi-Ribbon Flare and Failed Filament Eruption