A Better Linear Force-free Field

Details A Better Linear Force-free Field A Better Linear Force-free Field

Jun 1999

adsabs.harvard.edu/cgi-bin/nph-data_query?bibcode=1999apj...518..948w&link_type=abstract

The Astrophysical Journal, Volume 518, Issue 2, pp. 948-953.

Astronomy and Astrophysics

Astronomy

13

Magnetohydrodynamics: Mhd, Sun: Corona, Sun: Magnetic Fields

Scientific paper

Linear force-free fields are often used as approximate models for magnetic fields in the solar corona, calculated on the basis of boundary values measured in the low atmosphere. The problem that is set up and solved does not have a unique solution, however, and various particular solutions-motivated in large part by mathematical convenience-appear in the literature. A method is presented for calculating the linear force-free field that is consistent with the observed component of the magnetic field normal to the solar surface and has a minimum difference between the components tangent to the surface and the observed tangential field. The method is tested by application to a known nonlinear solution.

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