Loading...
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.
Type
Journal Article
Type of thesis
Series
Citation
Litvinenko, Y.E. (2011). Regular versus diffusive photospheric flux cancellation. The Astrophysical Journal Letters, 731:L39.
Date
2011
Publisher
The American Astronomical Society
Degree
Supervisors
Rights
This article has been published in the Astrophysical Journal Letters. © 2011 The American Astronomical Society.