Mathematics – Probability
Scientific paper
Dec 2007
adsabs.harvard.edu/cgi-bin/nph-data_query?bibcode=2007agufmsh23a1146c&link_type=abstract
American Geophysical Union, Fall Meeting 2007, abstract #SH23A-1146
Mathematics
Probability
2134 Interplanetary Magnetic Fields, 4468 Probability Distributions, Heavy And Fat-Tailed (3265), 4490 Turbulence (3379, 4568, 7863), 7857 Stochastic Phenomena (3235, 3265, 4475)
Scientific paper
Since early 90's it was shown that Probability Distribution Functions (PDFs) of small scale fluctuations of solar wind parameters (magnetic field, plasma velocity, etc.) display significant departures from Gaussianity. The non- Gaussian shape of PDFs was ascribed to intermittency and discussed in the framework of intermittent MHD turbulence. Here, we investigate the stochastic nature of the small scale fluctuations of magnetic field, as observed by Ulysses, by comparing the shape of PDFs (and cumulative distribution) to the prediction of a simple theoretical probabilistic model based on the subordination principle. The results suggest that small scale magnetic field fluctuations results from the superposition of a comprise of multiscale coherent magnetic structures.
Bavassano Bruno
Consolini Giuseppe
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