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A Nonlinear Force-Free Magnetic Field Approximation Suitable for Fast Forward-Fitting to Coronal Loops. I. Theory View all abstracts by submitter

Markus J. Aschwanden   Submitted: 2012-07-11 14:03

We derive an analytical approximation of nonlinear force-free magnetic field solutions (NLFFF) that can efficiently be used for fast forward-fitting to solar magnetic data, constrained either by observed line-of-sight magnetograms and stereoscopically triangulated coronal loops, or by 3D vector-magnetograph data. The derived NLFFF solutions provide the magnetic field components B_x({f x}), B_y({f x}), B_z({f x}), the force-free parameter α {f x}), the electric current density {f j}({f x}), and are accurate to second-order (of the nonlinear force-free α -parameter). The explicit expressions of a force-free field can easily be applied to modeling or forward-fitting of many coronal phenomena.

Authors: Markus J. Aschwanden
Projects: STEREO

Publication Status: Solar Physics (in press)
Last Modified: 2012-07-12 09:38
Go to main E-Print page  A Nonlinear Force-Free Magnetic Field Approximation         Suitable for Fast Forward-Fitting to Coronal Loops.  II. Numeric Code and Tests  Nonlinear small-scale dynamos at low magnetic Prandtl numbers  Edit Entry  Download Preprint  Submitter's Homepage Delete Entry 

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