Topology of magnetic fields from MDI data: Background field

Irina Knyazeva, N. G. Makarenko, L. M. Karimova

2010

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DOI 10.1134/s1063772910080081
Data confidence 70 medium
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Abstract

A quantitative description of the geometry and topology of the magnetic field of the Sun is given in terms of Minkowski functionals: the Euler characteristic and the perimeter of excursion sets for specified levels. Methods of mathematical morphology are applied to background fragments of magnetograms for the entire solar disk. The results obtained show that the topological characteristics of the background field are stable in time and correspond to log-normal, intermittent random fields.