Linear force-free magnetic field around quiescent solar prominences computed from observable boundary conditions

Details Linear force-free magnetic field around quiescent solar prominences computed from observable boundary conditions Linear force-free magnetic field around quiescent solar prominences computed from observable boundary conditions

Apr 1992

adsabs.harvard.edu/cgi-bin/nph-data_query?bibcode=1992a%26a...257..278d&link_type=abstract

Astronomy and Astrophysics (ISSN 0004-6361), vol. 257, no. 1, p. 278-286.

Astronomy and Astrophysics

Astrophysics

5

Boundary Value Problems, Force-Free Magnetic Fields, Solar Magnetic Field, Solar Prominences, Boundary Conditions, Finite Difference Theory, Magnetic Field Configurations, Solar Corona

Scientific paper

The magnetic support of solar prominences in two-dimensional linear force-free fields is analyzed. The prominence was modeled as a vertical current sheet with mass in equilibrium between gravity and magnetic forces. A finite difference numerical technique was used which incorporates both vertical photospheric and horizontal prominence magnetic field observations as boundary conditions. The mixed-boundary value problem is described and the current singularity generally present is eliminated by a modification of the initial boundary condition. Using the linear force-free hypothesis the bipolar and quadripolar regions were found to be associated with normal and inverse prominence polarity respectively. An increase of magnetic shear decreases the mass supported for a given vertical dependence of the field component orthogonal to the prominence.

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