The fractal nature of the polar plumes

Details The fractal nature of the polar plumes The fractal nature of the polar plumes

Jun 2002

adsabs.harvard.edu/cgi-bin/nph-data_query?bibcode=2002esasp.508..391l&link_type=abstract

In: Proceedings of the SOHO 11 Symposium on From Solar Min to Max: Half a Solar Cycle with SOHO, 11-15 March 2002, Davos, Switze

Computer Science

3

Polar Plumes, Coronal Holes, Fractal

Scientific paper

Polar plumes are often perceived as isolated structures, possibly tube-like, in super-radial expansion. As a consequence, coronal holes are considered composed of plumes and dominating inter-plume regions from which the fast solar wind originates. In order to test the validity of this concept, we pursued the analysis of a sequence of high cadence continuous observations obtained with the SOHO/LASCO-C2 coronagraph in March 1997. The spectral analysis of the plume pattern show that their spatial distribution is of fractal type. This implies that their distribution in a surface section of the coronal hole is self-affine and that coronal holes have a fibrous structure, at least at the spatial scales of the visible observations.

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