Physics
Scientific paper
Dec 1992
adsabs.harvard.edu/cgi-bin/nph-data_query?bibcode=1992soph..142..291d&link_type=abstract
Solar Physics (ISSN 0038-0938), vol. 142, no. 2, p. 291-311.
Physics
3
Dense Plasmas, Force-Free Magnetic Fields, Magnetic Field Configurations, Solar Magnetic Field, Solar Prominences, Coronal Loops, Current Sheets, Helical Flow, Solar Gravitation
Scientific paper
The magnetic support of solar prominences in analyzed in 2D linear force-free fields using a finite difference numerical technique which imcorporates both vertical photospheric and horizontal prominence magnetic field measurements. The prominences are modeled as vertical mass-loaded current sheets in equilibrium between gravity and magnetic forces, and a line current is added to model a helical configuration. The conditions determining the amplitude of the magnetic field in a prominence, the flux below the prominence, and the current intensity for a given line current height are shown. In the mixed boundary problem involving both bipolar and quadrupolar photospheric regions, the polarity of the field component orthogonal to the prominence is determined mainly by the imposed height of the line current. For bipolar regions above or below a critical height, the configuration is respectively inverse and normal.
Démoulin Pascal
Raadu Michael A.
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