scholarly journals Cyclic Evolution of Coronal Fields from a Coupled Dynamo Potential-Field Source-Surface Model

Solar Physics ◽  
2015 ◽  
Vol 291 (2) ◽  
pp. 339-355 ◽  
Author(s):  
Mausumi Dikpati ◽  
Akshaya Suresh ◽  
Joan Burkepile
Keyword(s):  
Potential Field ◽  
Surface Model ◽  
Source Surface ◽  
Field Source

scholarly journals An elliptic expansion of the potential field source surface model

2020 ◽  
Vol 638 ◽  
pp. A109
Author(s):  
M. Kruse ◽  
V. Heidrich-Meisner ◽  
R. F. Wimmer-Schweingruber ◽  
M. Hauptmann
Keyword(s):  
Magnetic Field ◽  
Potential Field ◽  
Three Dimensional ◽  
Coronal Magnetic Field ◽  
Magnetic Configuration ◽  
Surface Model ◽  
Source Surface ◽  
Field Source ◽  
Numerical Solver ◽  
Elliptical Models

Context. The potential field source surface model is frequently used as a basis for further scientific investigations where a comprehensive coronal magnetic field is of importance. Its parameters, especially the position and shape of the source surface, are crucial for the interpretation of the state of the interplanetary medium. Improvements have been suggested that introduce one or more additional free parameters to the model, for example, the current sheet source surface model. Aims. Relaxing the spherical constraint of the source surface and allowing it to be elliptical gives modelers the option of deforming it to more accurately match the physical environment of the specific period or location to be analyzed. Methods. A numerical solver is presented that solves Laplace’s equation on a three-dimensional grid using finite differences. The solver is capable of working on structured spherical grids that can be deformed to create elliptical source surfaces. Results. The configurations of the coronal magnetic field are presented using this new solver. Three-dimensional renderings are complemented by Carrington-like synoptic maps of the magnetic configuration at different heights in the solar corona. Differences in the magnetic configuration computed by the spherical and elliptical models are illustrated.

scholarly journals A Comparison between Global Solar Magnetohydrodynamic and Potential Field Source Surface Model Results

2006 ◽  
Vol 653 (2) ◽  
pp. 1510-1516 ◽  
Author(s):  
Pete Riley ◽  
J. A. Linker ◽  
Z. Mikić ◽  
R. Lionello ◽  
S. A. Ledvina ◽  
...  
Keyword(s):  
Potential Field ◽  
Surface Model ◽  
Source Surface ◽  
Field Source

scholarly journals Coronal magnetic fields from the inversion of linear polarization measurements

2009 ◽  
Vol 5 (S264) ◽  
pp. 96-98
Author(s):  
Yu Liu ◽  
Haosheng Lin ◽  
Jeff Kuhn
Keyword(s):  
Linear Polarization ◽  
Spatial Relation ◽  
Coronal Magnetic Field ◽  
Surface Model ◽  
Source Surface ◽  
Coronal Emission ◽  
Field Source ◽  
Close Relationship ◽  
The Difference ◽  
Ir Emission

AbstractReal 3-D coronal magnetic field reconstruction is expected to be made based on the technologies of IR spectrometry and tomography, in which the data from other wavelengths can be used as critical reference. Our recent studies focused on this issue are briefly reviewed in this paper. Liu & Lin (2008) first evaluated the validity of potential field source surface model applied to one of five limb regions in the corona by comparing the theoretical polarization maps with SOLARC observations in the IR Fe XIII 10747 Å forbidden coronal emission line (CEL). The five limb coronal regions were then studied together in order to study the spatial relation between the bright EUV features on the solar disk and the inferred IR emission sources, which were obtained from the inversion of the SOLARC linear polarization (LP) measurements (Liu 2009). The inversion for each fiber data in the field of view was made by finding the best location where the difference between the synthesized and the observed polarizations reaches the minimum in the integration path along the line of sight. We found a close relationship between the inferred IR emission source locations and the EUV strong emission positions.

scholarly journals Magnetic Connectivity of the Ecliptic Plane within 0.5 au: Potential Field Source Surface Modeling of the First Parker Solar Probe Encounter

2020 ◽  
Vol 246 (2) ◽  
pp. 23 ◽  
Author(s):  
Samuel T. Badman ◽  
Stuart D. Bale ◽  
Juan C. Martínez Oliveros ◽  
Olga Panasenco ◽  
Marco Velli ◽  
...  
Keyword(s):  
Potential Field ◽  
Ecliptic Plane ◽  
Surface Modeling ◽  
Source Surface ◽  
Field Source
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