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)

Abstract

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
Volume235
DOIs
Publication statusPublished - May 2006

Keywords

  • NULL POINTS
  • PHOTOSPHERIC FLUX
  • GREENS-FUNCTION
  • SOLAR CORONA
  • FIELDS
  • RECONNECTION
  • REGIONS
  • FLARE

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