The emergence of magnetic flux and its role on the onset of solar dynamic events
arXiv:1904.06274 · doi:10.1098/rsta.2018.0387
Abstract
A plethora of solar dynamic events, such as the formation of active regions, the emission of jets and the occurrence of eruptions is often associated to the emergence of magnetic flux from the interior of the Sun to the surface and above. Here, we present a short review on the onset, driving and/or triggering of such events by magnetic flux emergence. We briefly describe some key observational examples, theoretical aspects and numerical simulations, towards revealing the mechanisms that govern solar dynamics and activity related to flux emergence. We show that the combination of important physical processes like shearing and reconnection of magnetic fieldlines in emerging flux regions or at their vicinity, can power some of the most dynamic phenomena in the Sun on various temporal and spatial scales. Based on previous and recent observational and numerical studies, we highlight that, in most cases, none of these processes alone can drive and also trigger explosive phenomena releasing considerable amount of energy towards the outer solar atmosphere and space, such as flares, jets and large-scale eruptions (e.g. CMEs). In addition, one has to take into account the physical properties of the emerging field (e.g. strength, amount of flux, relative orientation to neighbouring and pre-existing magnetic fields, etc.) in order to better understand the exact role of magnetic flux emergence on the onset of solar dynamic events.
arXiv comment17 pages, 7 figures
References in corpus (45)
- A Model for Solar Coronal Mass Ejections
- Torus instability
- Ideal kink instability of a magnetic loop equilibrium
- Small-scale filament eruptions as the driver of solar coronal hole X-ray jets
- Observation of An Evolving Magnetic Flux Rope Prior To and During A Solar Eruption
- Criteria for Flux Rope Eruption: Non Equilibrium versus Torus Instability
- The origin, early evolution and predictability of solar eruptions
- Observing Flux Rope Formation During the Impulsive Phase of a Solar Eruption
- Eruption of a Kink-Unstable Filament in Active Region NOAA 10696
- 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
- The Emergence of a Twisted Flux Tube into the Solar Atmosphere: Sunspot Rotations and the Formation of a Coronal Flux Rope
- Plasma Jets and Eruptions in Solar Coronal Holes: a 3D flux emergence experiment
- Eruption of magnetic flux ropes during flux emergence
- Observations and modeling of the early acceleration phase of erupting filaments involved in coronal mass ejections
- A Breakout Model for Solar Coronal Jets with Filaments
- Critical decay index at the onset of solar eruptions
- Simulations of Emerging Magnetic Flux. I: The Formation of Stable Coronal Flux Ropes
- How can a Negative Magnetic Helicity Active Region Generate a Positive Helicity Magnetic Cloud ?
- Formation of Magnetic Flux Ropes during Confined Flaring Well Before the Onset of a Pair of Major Coronal Mass Ejections
- The effect of the relative orientation between the coronal field and new emerging flux: I Global Properties
- How Common are Hot Magnetic Flux Ropes in the Low Solar Corona? A Statistical Study of EUV Observations
- A three-dimensional study of reconnection, current sheets and jets resulting from magnetic flux emergence in the Sun
- Rotating Solar Jets in Simulations of Flux Emergence with Thermal Conduction
- Simulations of Emerging Magnetic Flux. II: The formation of Unstable Coronal Flux Ropes and the Initiation of CMEs
- How are Emerging Flux, Flares and CMEs Related to Magnetic Polarity Imbalance in MDI Data?
- Numerical Simulations of Flare-productive Active Regions: delta-sunspots, Sheared Polarity Inversion Lines, Energy Storage, and Predictions
- Flux emergence and coronal eruption
- Observational evidence of torus instability as trigger mechanism for coronal mass ejections: the 2011 August 4 filament eruption
- Flux-Rope Twist in Eruptive Flares and CMEs: due to Zipper and Main-Phase Reconnection
- Simulation of Flux Emergence from the Convection Zone to the Corona
- Flux cancellation and the evolution of the eruptive filament of 2011 June 7
- Helical Blowout Jets in the Sun: Untwisting and Propagation of Waves
- Onset of the magnetic explosion in solar polar coronal X-ray jets
- Numerical Experiments on the Two-step Emergence of Twisted Magnetic Flux Tubes in the Sun
- Sunspot rotation. I. A consequence of flux emergence
- Recurrent explosive eruptions and the sigmoid-to-arcade transformation in the sun driven by dynamical magnetic flux emergence
- Recurrent CME-like eruptions in emerging flux regions. I. On the mechanism of eruptions
- The spectroscopic imprint of the pre-eruptive configuration resulting into two major coronal mass ejections
- Uncovering the Birth of a Coronal Mass Ejection from Two-Viewpoint SECCHI Observations
- Emergence of non-twisted magnetic fields in the Sun: Jets and atmospheric response
- Sunspot rotation. II. Effects of varying the field strength and twist of an emerging flux tube
- Three-dimensional magnetohydrodynamic simulation of the solar magnetic flux emergence: Parametric study on the horizontal divergent flow
- Successful and Failed Flux Tube Emergence in the Solar Interior
- Recurrent CME-like Eruptions in Emerging Flux Regions. II. Scaling of Energy and Collision of Successive Eruptions
Cited by in corpus (10)
- Decoding the Pre-Eruptive Magnetic Field Configurations of Coronal Mass Ejections
- Sources of Solar Energetic Particles
- Multi-thermal jet formation triggered by flux emergence
- Eruption of a Magnetic Flux Rope in a Comprehensive Radiative Magnetohydrodynamic Simulation of flare-productive active regions
- Eruptions and Flaring Activity in Emerging Quadrupolar Regions
- Particle heating and acceleration by reconnecting and non-reconnecting Current Sheets
- On the possibility to probe the flare productivity of an active region on the early stage of emergence
- On the Lorentz Force and Torque of Solar Photospheric Emerging Magnetic Fields
- Planetary statistics and forecasting for solar flares
- Introduction to the physics of solar eruptions and their space weather impact