Coronal Magnetic Topologies in a Spherical Geometry I. Two Bipolar Flux Sources |
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| Authors: | Email author" target="_blank">R?C?MacleanEmail author G?Hornig E?R?Priest C?Beveridge |
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| Institution: | (1) Institute of Mathematics, University of St. Andrews, The North Haugh, St. Andrews, Fife, KY16 9AZ, U.K.;(2) Department of Physics, Montana State University, Bozeman, Montana, 59717, U.S.A. |
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| 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.
An erratum to this article is available at . |
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