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      Regular versus diffusive photospheric flux cancellation

      Litvinenko, Yuri E.
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      13-04 Litvinenko.pdf
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      DOI
       10.1088/2041-8205/731/2/L39
      Link
       iopscience.iop.org
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      Citation
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      Litvinenko, Y.E. (2011). Regular versus diffusive photospheric flux cancellation. The Astrophysical Journal Letters, 731:L39.
      Permanent Research Commons link: https://hdl.handle.net/10289/5564
      Abstract
      Observations of photospheric flux cancellation on the Sun imply that cancellation can be a diffusive rather than regular process. A criterion is derived, which quantifies the parameter range in which diffusive photospheric cancellation should occur. Numerical estimates show that regular cancellation models should be expected to give a quantitatively accurate description of photospheric cancellation. The estimates rely on a recently suggested scaling for a turbulent magnetic diffusivity, which is consistent with the diffusivity measurements on spatial scales varying by almost two orders of magnitude. Application of the turbulent diffusivity to large-scale dispersal of the photospheric magnetic flux is discussed.
      Date
      2011
      Type
      Journal Article
      Publisher
      The American Astronomical Society
      Rights
      This article has been published in the Astrophysical Journal Letters. © 2011 The American Astronomical Society.
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      • Computing and Mathematical Sciences Papers [1454]
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