Magnetic and thermodynamic structure of the solar corona during sunspot minimum

Details Magnetic and thermodynamic structure of the solar corona during sunspot minimum Magnetic and thermodynamic structure of the solar corona during sunspot minimum

May 1985

adsabs.harvard.edu/cgi-bin/nph-data_query?bibcode=1985svmf.nasa...66o&link_type=abstract

In NASA. Marshall Space Flight Center Meas. of Solar Vector Magnetic Fields p 66-77 (SEE N85-29869 18-92)

Physics

Magnetic Disturbances, Solar Corona, Solar Magnetic Field, Sunspot Cycle, Current Density, Differential Equations, Electric Current, Mathematical Models, Solar Physics, Sun

Scientific paper

A model of the solar corona during sunspot minimum was constructed. It was suggested that pole-equator asymmetry is caused by interaction of global azimuthal electric currents in the corona and potential magnetic fields originating below the corona. The problem was reduced to a nonlinear ordinary differential equation for a structural function. Taking the difference in electron density between the equatorial plane and the polar direction from observations, the basic equation was solved and the global electric current distribution around the Sun along with the magnetic and thermodynamic structures of the solar corona was derived. The asymmetry between the two hemispheres, which can be due to the magnetic quadrupole, is considered in detail. It is shown that an additional quadrupole term in the magnetic field representation affects the position of polar coronal hole boundaries differently in the two hemispheres. As a result, the outflow from the two polar regions is found to be different.

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