Preprocessing of vector magnetograph data for a non-linear force-free magnetic field reconstruction
arXiv:astro-ph/0612641 · doi:10.1007/S11207-006-2092-Z
Abstract
Knowledge regarding the coronal magnetic field is important for the understanding of many phenomena, like flares and coronal mass ejections. Because of the low plasma beta in the solar corona the coronal magnetic field is often assumed to be force-free and we use photospheric vector magnetograph data to extrapolate the magnetic field into the corona with the help of a non-linear force-free optimization code. Unfortunately the measurements of the photospheric magnetic field contain inconsistencies and noise. In particular the transversal components (say Bx and By) of current vector magnetographs have their uncertainties. Furthermore the magnetic field in the photosphere is not necessary force-free and often not consistent with the assumption of a force-free field above. We develop a preprocessing procedure to drive the observed non force-free data towards suitable boundary conditions for a force-free extrapolation. As a result we get a data set which is as close as possible to the measured data and consistent with the force-free assumption.
20 pages, 5 figures
References in corpus (3)
Cited by in corpus (222)
- Evolution of Magnetic Field and Energy in A Major Eruptive Active Region Based on SDO/HMI Observation
- A Critical Assessment of Nonlinear Force-Free Field Modeling of the Solar Corona for Active Region 10953
- Structure, Stability, and Evolution of Magnetic Flux Ropes from the Perspective of Magnetic Twist
- Non-linear force-free field modeling of a solar active region around the time of a major flare and coronal mass ejection
- Why Is the Great Solar Active Region 12192 Flare-Rich But CME-Poor?
- The Magnetic Field in the Solar Atmosphere
- Nonlinear force-free modeling of the solar coronal magnetic field
- How to optimize nonlinear force-free coronal magnetic field extrapolations from SDO/HMI vector magnetograms?
- Solar Force-free Magnetic Fields
- High-resolution observations of flare precursors in the low solar atmosphere
- A Comparative Study of Confined and Eruptive Flares in NOAA AR 10720
- Twisting solar coronal jet launched at the boundary of an active region
- Block-induced complex structures building the flare-productive solar active region 12673
- Rapid Changes of Photospheric Magnetic Field after Tether-Cutting Reconnection and Magnetic Implosion
- Formation of Magnetic Flux Ropes during Confined Flaring Well Before the Onset of a Pair of Major Coronal Mass Ejections
- Extrapolation of the Solar Coronal Magnetic Field from SDO/HMI Magnetogram by a CESE--MHD--NLFFF Code
- Computing nonlinear force-free fields in spherical geometry
- The Origin of Major Solar Activity - Collisional Shearing Between Nonconjugated Polarities of Multiple Bipoles Emerging Within Active Regions
- The Influence of Spatial Resolution on Nonlinear Force-Free Modeling
- On the 2012 October 23 circular ribbon flare: emission features and magnetic topology
- Eruption of a multi-flux-rope system in solar active region 12673 leading to the two largest flares in Solar Cycle 24
- Hooked flare ribbons and flux-rope related QSL footprints
- Magnetic Energy and Helicity Budgets in the Active-Region Solar Corona. II. Nonlinear Force-Free Approximation
- Recurrent Coronal Jets Induced by Repetitively Accumulated Electric Currents
- Waves in the lower solar atmosphere: the dawn of next-generation solar telescopes
- A Non-radial Eruption in a Quadrupolar Magnetic Configuration with a Coronal Null
- The Role of Erupting Sigmoid in Triggering a Flare with Parallel and Large-Scale Quasi-Circular Ribbons
- An optimization principle for the computation of MHD equilibria in the solar corona
- Nonlinear Force-Free Extrapolation of the Coronal Magnetic Field Based on the MHD Relaxation Method
- Testing magnetofrictional extrapolation with the Titov-Démoulin model of solar active regions
- Magnetohydrodynamic Simulation of the X2.2 Solar Flare on 2011 February 15: II. Dynamics Connecting the Solar Flare and the Coronal Mass Ejection
- Accuracy of magnetic energy computations
- A self-consistent nonlinear force-free solution for a solar active region magnetic field
- Topological Analysis of Emerging Bipole Clusters Producing Violent Solar Events
- Solar Magnetic Flux Rope Eruption Simulated by a Data-Driven Magnetohydrodynamic Model
- Can We Improve the Preprocessing of Photospheric Vector Magnetograms by the Inclusion of Chromospheric Observations?
- The role of non-axisymmetry of magnetic flux rope in constraining solar eruptions
- Regularized Biot-Savart Laws for Modeling Magnetic Flux Ropes
- Magnetic Field Extrapolations in the Corona: Success and Future Improvements
- Statistical Analysis of Torus and Kink Instabilities in Solar Eruptions
- Spatially and Spectrally Resolved Observations of a Zebra Pattern in Solar Decimetric Radio Burst
- A Circular-ribbon Solar Flare Following an Asymmetric Filament Eruption
- Two Episodes of Magnetic Reconnections During a Confined Circular-ribbon Flare
- Validation and Benchmarking of a Practical Free Magnetic Energy and Relative Magnetic Helicity Budget Calculation in Solar Magnetic Structures
- Magnetohydrodynamic Modeling of a Solar Eruption Associated with X9.3 Flare Observed in Active Region 12673
- Nonlinear force-free models for the solar corona I. Two active regions with very different structure
- Structure and Evolution of Magnetic Fields Associated with Solar Eruptions (Invited Review)
- Magnetography of Solar Flaring Loops with Microwave Imaging Spectropolarimetry
- Round-trip Slipping Motion of the Circular Flare Ribbon Evidenced in a Fan-spine Jet
- Magnetic helicity and energy budget around large confined and eruptive solar flares
- Guiding Nonlinear Force-Free Modeling Using Coronal Observations: First Results Using a Quasi Grad-Rubin Scheme
- Study of Two Successive Three-Ribbon Solar Flares on 2012 July 6
- Nonlinear force-free magnetic field extrapolations: comparison of the Grad-Rubin and Wheatland-Sturrock-Roumeliotis algorithm
- The formation of an inverse S-shaped active-region filament driven by sunspot motion and magnetic reconnection
- Study of the 3D Coronal Magnetic Field of Active Region 11117 Around the Time of a Confined Flare Using a Data-Driven CESE--MHD Model
- Motions of Hard X-ray Sources During an Asymmetric Eruption
- Nonlinear force-free coronal magnetic field modelling and preprocessing of vector magnetograms in spherical geometry
- The origin of net electric currents in solar active regions
- On the extrapolation of magneto-hydro-static equilibria on the sun
- Time Evolution of Coronal Magnetic Helicity in the Flaring Active Region NOAA 10930
- Magnetohydrodynamic simulation of magnetic null-point reconnections in NOAA AR12192 initiated with an extrapolated non-force-free-field
- Partial eruption of a filament with twisting nonuniform fields
- Three-dimensional Magnetic Restructuring in Two Homologous Solar Flares in the Seismically Active NOAA AR 11283
- First nonlinear force-free field extrapolations of SOLIS/VSM data
- Magnetohydrodynamic Simulation of Magnetic Null-point Reconnections and Coronal dimmings during the X2.1 flare in NOAA AR 11283
- Source region of the 2003 November 18 CME that led to the strongest magnetic storm of cycle 23
- Modeling Magnetic Field Structure of a Solar Active Region Corona using Nonlinear Force-Free Fields in Spherical Geometry
- Magnetic helicity and eruptivity in active region 12673
- A New Code for Nonlinear Force-Free Field Extrapolation of the Global Corona
- Achieving Self-Consistent Nonlinear Force-free Modeling of Solar Active Regions
- Investigating Energetic X-Shaped Flares on the Outskirts of A Solar Active Region
- A secondary fan-spine magnetic structure in active region 11897
- The 3D structure of an active region filament as extrapolated from photospheric and chromospheric observations
- Thermodynamic and Magnetic Topology Evolution of the X1.0 Flare on 2021 October 28 Simulated by a Data-driven Radiative Magnetohydrodynamic Model
- Slipping Magnetic Reconnection of Flux Rope Structures as a Precursor to an Eruptive X-class Solar Flare
- Formation of an active region filament driven by a series of jets
- The eruption of a small-scale emerging flux rope as the driver of an M-class flare and a coronal mass ejection
- Preprocess the Photospheric Vector Magnetograms for NLFFF Extrapolation using a Potential Field Model and an Optimization Method
- Non-equilibrium Flux Rope Formation by Confined Flares Preceding a Solar Coronal Mass Ejection
- Casting the Coronal Magnetic Field Reconstruction Tools in 3D Using MHD Bifrost Model
- Observational Analysis on the Early Evolution of a CME Flux-rope: Pre-flare reconnection and Flux-rope's Footpoint Drift
- High-Resolution Observations of Flares in an Arch Filament System
- Very fast helicity injection leading to critically stable state and large eruptive activity in solar active region NOAA 12673
- Structure and Stability of Magnetic Fields in Solar Active Region12192 Based on Nonlinear Force-Free Field Modeling
- Effect of transport coefficients on excitation of flare-induced standing slow-mode waves in coronal loops
- Magneto-static modelling from SUNRISE/IMaX: Application to an active region observed with SUNRISE II
- Re-flaring of a Post-Flare Loop System Driven by Flux Rope Emergence and Twisting
- Generation mechanisms of quasi-parallel and quasi-circular flare ribbons in a confined flare
- Mini-filament Eruptions Triggering Confined Solar Flares Observed by ONSET and SDO
- Nonlinear force-free field extrapolation in spherical geometry: improved boundary data treatment applied to a SOLIS/VSM vector magnetogram
- On the reliability of magnetic energy and helicity computations based on nonlinear force-free coronal magnetic field models
- A comparison of preprocessing methods for solar force-free magnetic field extrapolation
- Three-dimensional Forward-fit Modeling of the Hard X-Ray and the Microwave Emissions of the 2015 June 22 M6.5 Flare
- Magnetic Stereoscopy
- Transition from circular-ribbon to parallel-ribbon flares associated with a bifurcated magnetic flux rope
- On the Force-Freeness of the Photospheric Sunspot Magnetic Fields as Observed from Hinode (SOT/SP)
- A Magnetostatic Grad-Rubin Code for Coronal Magnetic Field Extrapolations
- Coronal Mini-jets in an Activated Solar Tornado-like Prominence
- Quantifying the Topology and Evolution of a Magnetic Flux Rope Associated with Multi-flare Activities
- Material supply and magnetic configuration of an active region filament
- Contracting and Erupting Components of Sigmoidal Active Regions
- Imaging and spectral study on the null point of a fan-spine structure during a solar flare
- Understanding the white-light flare on 2012 March 9 : Evidence of a two-step magnetic reconnection
- Comparison of Nonlinear Force-free Field and Potential Field in the Quiet Sun
- Magnetic Twists of Solar Filaments
- Multiple injections of energetic electrons associated with the flare/CME event on 9 October 2021
- Successive Injection of Opposite Magnetic Helicity in Solar Active Region NOAA 11928
- New Evidence that Magnetoconvection Drives Solar-Stellar Coronal Heating
- Testing non-linear force-free coronal magnetic field extrapolations with the Titov-Demoulin equilibrium
- A Study of a Compound Solar Eruption with Two Consecutive Erupting Magnetic Structures
- Recurring Homologous Solar Eruptions in NOAA AR 11429
- Non-LTE inversions of a confined X2.2 flare: I. Vector magnetic field in the photosphere and chromosphere
- Evolutionary stages and triggering process of a complex eruptive flare with circular and parallel ribbons
- Nonlinear force-free coronal magnetic field extrapolation scheme based on the direct boundary integral formulation
- A comparative study between a failed and a successful eruption initiated from the same polarity inversion line in AR 11387
- Filament Eruption and Its Reformation Caused by Emerging Magnetic Flux
- Full-disk nonlinear force-free field extrapolation of SDO/HMI and SOLIS/VSM magnetograms
- Extreme Ultraviolet Late Phase of Solar Flares
- Eruptive-Impulsive Homologous M-class Flares Associated with Double-Decker Flux Rope Configuration in Mini-Sigmoid of NOAA 12673
- Nonlinear force-free modelling: influence of inaccuracies in the measured magnetic vector
- Formation of a Magnetic Flux Rope in the Early Emergence Phase of NOAA Active Region 12673
- Extending Counter-Streaming Motion from an Active Region Filament to Sunspot Light Bridge
- Active region chromospheric magnetic fields
- Diagnostics of Ellerman Bombs with High-resolution Spectral Data
- Coronal Alfven speeds in an isothermal atmosphere I. Global properties
- Evolution of Photospheric Vector Magnetic Field Associated with Moving Flare Ribbons As Seen By GST
- Identification of Pre-flare Processes and Their Possible Role in Driving a Large-scale Flux Rope Eruption with Complex M-class Flare in the Active Region NOAA 12371
- A Comparison Between Nonlinear Force-Free Field and Potential Field Models Using Full-Disk SDO/HMI Magnetogram
- Magnetic Energy Dissipation during the 2014 March 29 Solar Flares
- Magnetohydrodynamic modeling of solar coronal dynamics with an initial non-force-free magnetic field
- Extremely Large Extreme-ultraviolet Late Phase Powered by Intense Early Heating in a Non-eruptive Solar Flare
- Test magnetohydrostatic extrapolation with radiative MHD simulation of a solar flare
- Towards a Quantitative Comparison of Magnetic Field Extrapolations and Observed Coronal Loops
- Observational Evidence of Magnetic Reconnection Associated with Magnetic Flux Cancellation
- The correlation of fractal structures in the photospheric and the coronal magnetic field
- An MHD Modeling of Successive X2.2 and X9.3 Solar Flares of 2017 September 6
- Solar stereoscopy - where are we and what developments do we require to progress?
- A partial filament eruption in three steps induced by external magnetic reconnection
- Bidirectional outflows as evidence of magnetic reconnection leading to a solar microflare
- Study of Three-Dimensional Magnetic Structure and the Successive Eruptive Nature of Active Region 12371
- Disintegration of an Eruptive Filament via Interactions with Quasi-Separatrix Layers
- Magnetic Connectivity between Active Regions 10987, 10988, and 10989 by Means of Nonlinear Force-Free Field Extrapolation
- Deducing the reliability of relative helicities from nonlinear force-free coronal models
- The Formation of a Magnetic Channel by the Emergence of Current-carrying Magnetic Fields
- Study on two Methods for Nonlinear Force-free Extrapolation Based on Semi-Analytical Field
- Blind Stereoscopy of the Coronal Magnetic Field
- A Magnetohydrodynamic Relaxation Method for Non-Force-Free Magnetic Field in Magnetohydrostatic Equilibrium
- Separable solutions of force-free spheres and applications to solar active regions
- Simulating Flaring Events in Complex Active Regions Driven by Observed Magnetograms
- Magnetic structure of solar flare regions producing hard X-ray pulsations
- Optimization of Magnetic Flux Ropes Modeled with the RBSL method
- Successive occurrences of quasi-circular ribbon flares in a fan-spine-like configuration involving hyperbolic flux tube
- 3D Structure of Microwave Sources from Solar Rotation Stereoscopy vs Magnetic Extrapolations
- Quantitative Characterization of Magnetic Flux Rope Properties for Two Solar Eruption Events
- Magnetohydrostatic modeling of AR11768 based on a SUNRISE/IMaX vector magnetogram
- Helical Twisting Number and Braiding Linkage Number of Solar Coronal Loops
- Unveiling the mechanism for the rapid acceleration phase in a solar eruption
- Gradual Magnetic Evolution of Sunspot Structure and Filament-Corona Dynamics Associated with the X1.8 Flare in AR 11283
- The 2019 International Women's Day event: A two-step solar flare with multiple eruptive signatures and low Earth impact
- Evolution of the Non-potential Magnetic Field in the Solar Active Region 12673 Based on a Nonlinear Force-free Modeling
- Untwisting Jets Related to Magnetic Flux Cancellation
- Chromospheric magnetic field: A comparison of He I 10830 A observations with nonlinear force-free field extrapolation
- Global Solar Free Magnetic Energy and Electric Current Density Distribution of Carrington Rotation 2124
- Torsional Alfvénic Oscillations Discovered in the Magnetic Free Energy During Solar Flares
- Two-step evolution of a rising flux rope resulting in a confined solar flare
- Global Energetics of Solar Flares. XI. Flare Magnitude Predictions of the GOES-Class
- Global Energetics of Solar Flares. XII. Energy Scaling Laws
- Global Energetics of Solar Flares. IX. Refined Magnetic Modeling
- Studying the transfer of magnetic helicity in solar active regions with the connectivity-based helicity flux density method
- Arcade Implosion Caused by a Filament Eruption in a Flare
- Harmonic ECME Excited by Energetic Electrons Travelling Inside A Coronal Loop
- Astrophysics in 2006
- Magnetohydrodynamics dynamical relaxation of coronal magnetic fields. I. Parallel untwisted magnetic fields in 2D
- Grow-up of a Filament Channel by Intermittent Small-scale Magnetic Reconnection
- Comparison of the Hall Magnetohydrodynamics and Magnetohydrodynamics evolution of a flaring solar active region
- Evidence for Partial Taylor Relaxation from Changes in Magnetic Geometry and Energy during a Solar Flare
- Formation Heights of Extreme Ultraviolet Lines in an Active Region Derived by Correlation of Doppler Velocity and Magnetic Field
- Energy Partition in Four Confined Circular-Ribbon Flares
- A Deep Learning Approach to Generating Photospheric Vector Magnetograms of Solar Active Regions for SOHO/MDI Using SDO/HMI and BBSO Data
- Reconnection generated plasma flows in the quasi-separatrix layer in localised solar corona
- Toward a fast and consistent approach to model solar magnetic fields in multiple layers
- Non-Stationary Fast-Driven Self-Organized Criticality in Solar Flares
- The effect of spatial sampling on magnetic field modeling and helicity computation
- Unveiling the True Nature of Plasma Dynamics from the Reference Frame of a Super-penumbral Fibril
- High-resolution Observation of Downflows at One End of a Pre-eruption Filament
- Vector Magnetic Fields and Electric Currents from the Imaging Vector Magnetograph
- The configuration and failed eruption of a complex magnetic flux rope above a δ sunspot region
- Harmonic Electron Cyclotron Maser Emission along the Coronal Loop
- Observational Study of Recurrent Jets: Evolution of Magnetic Flux, Current, and Helicity
- Modeling coronal magnetic field using spherical geometry: cases with several active regions
- Temporal and spatial relationship of flare signatures and the force-free coronal magnetic field
- Global energetics of solar powerful events on 6 September 2017
- Effect of Size of the Computational Domain on Spherical Nonlinear Force-Free Modeling of Coronal Magnetic Field Using SDO/HMI Data
- Change ratios of magnetic helicity and magnetic free energy during major solar flares
- Multi-instrument Comparative Study of Temperature, Number Density, and Emission Measure during the Precursor Phase of a Solar Flare
- Simulation of a Solar Jet Formed from an Untwisting Flux Rope Interacting with a Null Point
- Modelling the magnetic structure of a large-scale horse-shoe-like filament in a decaying and diffuse active region
- On the Lorentz Force and Torque of Solar Photospheric Emerging Magnetic Fields
- An observationally-driven kinetic approach to coronal heating
- A Research on the Force-Freeness of Photosphere Magnetic Field
- Comparison of Two Methods for Calculating Magnetic Helicity in the Solar Corona
- Coronal magnetic field evolution over the cycle 24
- Tracking downflows from the chromosphere to the photosphere in a solar arch filament system
- A Solar Magnetic-fan Flaring Arch Heated by Non-thermal Particles and Hot Plasma from an X-ray Jet Eruption
- An Atypical Plateau-like Extreme-ultraviolet Late-phase Solar Flare Driven by the Non-radial Eruption of a Magnetic Flux Rope
- Self-consistent Nonlinear Force-free Field Reconstruction from Weighted Boundary Conditions
- Error Analysis regarding the calculation of NLFF Field
- Estimating electric current densities in solar active regions
- Homologous flaring activity over a sunspot light bridge in an emerging active region
- The dynamics of AR 12700 in its early emerging phase I: interchange reconnection
- The dynamics of AR 12700 in its early emerging phase II: fan-shaped activities relevant to arch filament systems
- Preprocessing of vector magnetograms for magnetohydrostatic extrapolations
- Observational Comparison Between Confined and Eruptive Flares: Magnetohydrodynamics Instability Parameters in a Similar Magnetic Configuration
- A giant dark channel across the solar equator consisting of two filament channels with different chiralities
- Reconstruction of Coronal Magnetic Fields Using a Poloidal-Toroidal Representation
- Observational study of the formation of homologous confined circular-ribbon flares
- The Efficiency of Harmonic Emissions Excited by Energetic Electrons in Coronal Loops
- Validity of NLFFF Optimization Reconstruction
- Formation and rising phase of a flux rope through data-constrained simulations
- New Statistical Topology Theory Predicts Turbulent Magnetic Emergence from the Sun's Interior
- Magnetic Structure in Successively Erupting Active Regions: Comparison of Flare-Ribbons with Quasi-Separatrix Layers
- Fields and Flares: Understanding the Complex Magnetic Topologies of Solar Active Regions