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- W2087904460 abstract "We describe a newly developed code for the extrapolation of nonlinear force-free coronal magnetic fields in spherical coordinates. The program uses measured vector magnetograms on the solar photosphere as input and solves the force-free equations in the solar corona. The method is based on an optimization principle and the heritage of the newly developed code is a corresponding method in Cartesian geometry. We test the newly developed code with the help of a semi-analytic solution and rate the quality of our reconstruction qualitatively by magnetic field line plots and quantitatively with a number of comparison metrics. We find that we can reconstruct the original test field with high accuracy. The method is fast if the computation is limited to low co-latitudes (say 30°≤θ≤150°), but it becomes significantly slower if the polar regions are included." @default.
- W2087904460 created "2016-06-24" @default.
- W2087904460 creator A5000514318 @default.
- W2087904460 date "2007-02-01" @default.
- W2087904460 modified "2023-09-30" @default.
- W2087904460 title "Computing Nonlinear Force-Free Coronal Magnetic Fields in Spherical Geometry" @default.
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- W2087904460 doi "https://doi.org/10.1007/s11207-006-0266-3" @default.
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