Generalisation of the Magnetic Field Configuration of typical and atypical Confined Flares

Abstract

Atypical flares cannot be naturally explained with standard models. To predict such flares, we need to define their physical characteristics, in particular, their magnetic environment, and identify pairs of reconnected loops. Here, we present in detail a case-study of a confined flare preceded by flux cancellation that leads to the formation of a filament. The slow rise of the non-eruptive filament favours the growth and reconnection of overlying loops. The flare is only of C5.0 class but it is a long duration event. The reason is that it is comprised of three successive stages of reconnection. A non-linear force-free field extrapolation and a magnetic topology analysis allow us to identify the loops involved in the reconnection process and build a reliable scenario for this atypical confined flare. The main result is that a curved magnetic polarity inversion line in active regions is a key ingredient for producing such atypical flares. A comparison with previous extrapolations for typical and atypical confined flares leads us to propose a cartoon for generalizing the concept

arXiv comment32 pages, 17 figures, Accepted for publication in ApJ Journal

References in corpus (33)

• A Model for Solar Coronal Mass Ejections
• Confined and ejective eruptions of kink-unstable flux ropes
• The Helioseismic and Magnetic Imager (HMI) Vector Magnetic Field Pipeline: Overview and Performance
• VFISV: Very Fast Inversion of the Stokes Vector for the Helioseismic and Magnetic Imager
• Jets in coronal holes: Hinode observations and 3D computer modelling
• Why Is the Great Solar Active Region 12192 Flare-Rich But CME-Poor?
• The standard flare model in three dimensions III. Slip-running reconnection properties
• From coronal observations to MHD simulations, the building blocks for 3D models of solar flares
• Solar filament eruptions and their physical role in triggering Coronal Mass Ejections
• Fan-spine topology formation through two-step reconnection driven by twisted flux emergence
• Slipping magnetic reconnection during an X-class solar flare observed by SDO/AIA
• Critical decay index at the onset of solar eruptions
• The Magnetic Topology of Coronal Mass Ejection sources
• Evolution of Flare Ribbons, Electric Currents and Quasi-separatrix Layers During an X-class Flare
• Evidence of Magnetic Helicity in Emerging Flux and Associated Flare
• The Role of Erupting Sigmoid in Triggering a Flare with Parallel and Large-Scale Quasi-Circular Ribbons
• Topological Analysis of Emerging Bipole Clusters Producing Violent Solar Events
• An Unorthodox X-Class Long-Duration Confined Flare
• Pre-flare activity and magnetic reconnection during the evolutionary stages of energy release in a solar eruptive flare
• Forced field extrapolation of the magnetic structure of the Halpha fibrils in solar chromosphere
• Evolution of Hard X-ray Sources and Ultraviolet Solar Flare Ribbons for a Confined Eruption of a Magnetic Flux Rope
• Formation of Compound Flux Rope by The Merging of Two Filament Channels, Associated Dynamics and its Stability
• Statistical study of magnetic non-potential measures in confined and eruptive flares
• Can we explain non-typical solar flares?
• Large-scale contraction and subsequent disruption of coronal loops during various phases of the M6.2 flare associated with the confined flux rope eruption
• The transition from eruptive to confined flares in the same active region
• Flux Rope Breaking and Formation of a Rotating Blowout Jet
• Onset of a Large Ejective Solar Eruption from a Typical Coronal-Jet-Base Field Configuration
• Generation mechanisms of quasi-parallel and quasi-circular flare ribbons in a confined flare
• Impulsive energy release and non-thermal emission in a confined M4.0 flare triggered by rapidly evolving magnetic structures
• Observational and model analysis of a two-ribbon flare possibly induced by a neighbouring blowout jet
• Energetics and dynamics of an impulsive flare on March 10, 2001
• The 17 February 2013 sunquake in the context of the active region's magnetic field configuration

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• Toward a fast and consistent approach to model solar magnetic fields in multiple layers
• Two-stage evolution of an extended C-class eruptive flaring activity from sigmoid active region NOAA 12734: SDO and Udaipur-CALLISTO observations
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