Coronal magnetic topologies in a spherical geometry I. Two bipolar flux sources

R. C. Maclean, G. Hornig, E. R. Priest, C. Beveridge

    Research output: Contribution to journalArticlepeer-review

    9 Citations (Scopus)


    The evolution of the solar corona is dominated to a large extent by the hugely complicated magnetic field which threads it. Magnetic topology provides a tool to decipher the structure of this field and thus help to understand its behaviour. Usually, the magnetic topology of a potential field is calculated due to flux sources on a locally planar photospheric surface. We use a Green's function method to extend this theory to sources on a global spherical surface. The case of two bipolar flux-balanced source regions is studied in detail, with an emphasis on how the distribution and relative strengths of the source regions affect the resulting topological states. A new state with two spatially distinct separators connecting the same two magnetic null points, called the “dual intersecting“ state, is discovered.
    Original languageEnglish
    Pages (from-to)259-280
    Number of pages22
    JournalSolar Physics
    Issue number1 & 2
    Publication statusPublished - 2006


    • Magnetic topology
    • Solar corona


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