Physics
Scientific paper
Jul 1983
adsabs.harvard.edu/cgi-bin/nph-data_query?bibcode=1983sssmp..26..739w&link_type=abstract
Scientia Sinica, Series A - Mathematical, Physical, Astronomical and Technical Sciences (ISSN 0253-5831), vol. 26, July 1983, p.
Physics
Magnetic Field Configurations, Plasma Equilibrium, Solar Magnetic Field, Solar Prominences, Brightness Distribution, Equilibrium Equations, Magnetic Flux, Ring Structures, Solar Corona, Solar Physics
Scientific paper
In 1980 the Beijing Observatory had successively observed several rare completely closed ring prominences whose ring plane was approximately parallel to the solar surface with a characteristic life about 1-2 days. In this paper the static equilibrium of this kind of horizontal ring plasma under the simultaneous actions of magnetic force, gravity and pressure gradients is discussed. Assuming ring plasma with axisymmetry and rectangular plasma cross-section and adopting closed magnetic field boundary condition from the basic equations the exact zero order general solutions for magnetic field (force-free field) and density (pressure) are obtained. An eigen-solution is obtained for the zero order magnetic field and density as well as the first order magnetic field, thus giving a kind of the possible distribution of magnetic field and density for the horizontal closed ring prominence. The closed magnetic structure of ring prominence as presented in this paper, has no link with the force lines of the outside corona magnetic field. This is helpful to explain the great temperature difference between prominence and corona.
Hu Wayne
Lin Yangtin
Wang Ziqiang
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