Coronal magnetic-field model with non-spherical source surface

Details Coronal magnetic-field model with non-spherical source surface Coronal magnetic-field model with non-spherical source surface

Nov 1978

adsabs.harvard.edu/cgi-bin/nph-data_query?bibcode=1978soph...60...83s&link_type=abstract

Solar Physics, vol. 60, Nov. 1978, p. 83-104. Research supported by the Aerospace Corp.;

Physics

22

Astronomical Models, Magnetohydrodynamics, Solar Corona, Solar Magnetic Field, Stellar Models, Atmospheric Models, Interplanetary Magnetic Fields, Photosphere

Scientific paper

The paper describes a straightforward geometrical construction which approximates the mapping of solar magnetic fields through the corona to interplanetary space. The new modeling technique is based on a nonspherical source surface, which is taken to be an isogauss of the underlying potential field generated by currents in or below the photosphere. This modification of the source surface significantly improves the agreement between the geometrical construction and the MHD solution (for nonradial plasma flow out to a distance of approximately 10 solar radii) while retaining most of the computational ease provided by a spherical source surface. A detailed comparison between the present source-surface model and the MHD solution is made for the internal dipole case.

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