Unique determination of model coronal magnetic fields using photospheric observations

Details Unique determination of model coronal magnetic fields using photospheric observations Unique determination of model coronal magnetic fields using photospheric observations

Jan 1993

adsabs.harvard.edu/cgi-bin/nph-data_query?bibcode=1993soph..143...41z&link_type=abstract

Solar Physics (ISSN 0038-0938), vol. 143, no. 1, p. 41-48.

Physics

35

Boundary Conditions, Electric Current, Photosphere, Solar Corona, Solar Magnetic Field, Solar Radiation, Solar Rotation

Scientific paper

We show that the nonradial field-boundary condition (or the line-of-sight boundary condition) for the Laplacian-like equation developed by Bogdan and Low (1986) is sufficient to uniquely determine the model coronal magnetic field provided the electric currents are horizontal (or zero, the current-free case) at the solar surface as well as in the solar atmosphere between the photosphere and the source surface. The derived recursion formulae for the spherical harmonic coefficients can be used to determine the spherical harmonic coefficients in the solutions of the horizontal current models very efficiently.

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