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A self-consistent nonlinear force-free solution for a solar active region magnetic field View all abstracts by submitter

Mike Wheatland   Submitted: 2009-06-24 01:13

Nonlinear force-free solutions for the magnetic field in the solar corona constructed using photospheric vector magnetic field boundary data suffer from a basic problem: the observed boundary data are inconsistent with the nonlinear force-free model. Specifically, there are two possible choices of boundary conditions on vertical current provided by the data, and the two choices lead to different force-free solutions. A novel solution to this problem is described. Bayesian probability is used to modify the boundary values on current density, using field-line connectivity information from the two force-free solutions and taking into account uncertainties, so that the boundary data are more consistent with the two nonlinear force-free solutions. This procedure may be iterated until a set of self-consistent boundary data (the solutions for the two choices of boundary conditions are the same) is achieved. The approach is demonstrated to work in application to Hinode/SOT observations of NOAA active region 10953.

Authors: M.S. Wheatland and S. Regnier
Projects: Hinode/SOT

Publication Status: Accepted for publication in ApJ Letters
Last Modified: 2009-06-24 07:27
Go to main E-Print page  Limitations of Absolute Current Densities Derived from the Semel & Skumanich Method  Characteristics of magnetoacoustic sausage modes  Edit Entry  Download Preprint  Submitter's Homepage Delete Entry 

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