Astronomy and Astrophysics – Astrophysics
Scientific paper
Sep 1981
adsabs.harvard.edu/cgi-bin/nph-data_query?bibcode=1981apj...248..817s&link_type=abstract
Astrophysical Journal, Part 1, vol. 248, Sept. 1, 1981, p. 817-829. Research supported by the Smithsonian Institution;
Astronomy and Astrophysics
Astrophysics
24
Convection, Electric Current, Magnetohydrodynamics, Photosphere, Solar Corona, Current Density, Scaling Laws, Solar Magnetic Field
Scientific paper
Generation of electric currents in a magnetized plasma overlying a dense convective layer is studied, assuming that the magnetic field perturbation is small and satisfies the force-free equation. Currents are produced by rotational motions on the boundary in the case of a uniform equilibrium field. In a simple two-dimensional bipolar configuration, however, both irrotational and incompressible motions give rise to currents, and the current density has a peak at the magnetic neutral line. Scaling laws for the current density as well as for the stored magnetic energy are derived, and the possibility of heating the solar corona through the dissipation of coronal currents generated in this way is discussed.
Levine Randolph H.
Sakurai Takashi
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