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| Titel |
A probabilistic approach to heterogeneity in space plasmas: the case of magnetic field intensity in solar wind |
| VerfasserIn |
G. Consolini, B. Bavassano, P. Michelis |
| Medientyp |
Artikel
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| Sprache |
Englisch
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| ISSN |
1023-5809
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| Digitales Dokument |
URL |
| Erschienen |
In: Nonlinear Processes in Geophysics ; 16, no. 2 ; Nr. 16, no. 2 (2009-04-07), S.265-273 |
| Datensatznummer |
250013137
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| Publikation (Nr.) |
 copernicus.org/npg-16-265-2009.pdf |
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| Zusammenfassung |
| Since the early 90s it was shown that Probability Distribution Functions (PDFs) of small scale
differences (fluctuations) of several quantities in space plasmas 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 put the attention to the PDF of magnetic field intensity
instead of its differences showing how the PDF of such quantity in a quiet solar wind can be
related with the occurrence of heterogeneity. In detail, we derive the shape of the PDFs by
simple statistical considerations based on the concept of subordination in probability
theory. An interpretation and a discussion in terms of existing coherent magnetic structures
in a mechanical near-equilibrium state are also presented. |
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