Mathematics – Logic
Scientific paper
Jun 2011
adsabs.harvard.edu/cgi-bin/nph-data_query?bibcode=2011cosre..49..194k&link_type=abstract
Cosmic Research, Volume 49, Issue 3, pp.194-204
Mathematics
Logic
Scientific paper
Statistical properties of magnetic field and plasma flux fluctuations outside the Earth's magnetosphere are studied on various time scales based on the INTERBALL-1 satellite data. The analysis of "rough" turbulence characteristics has shown that turbulence properties in various parts of the magnetosheath are distinct. The spectral density of the magnetic field undergoes a break at a frequency of ˜0.5 Hz. As a more "fine" characteristic of the fluctuations on various time scales, changes in the shape and parameters of the probability density function were studied. The analysis of the height of a maximum of the probability density function P(0) and of the kurtosis values have shown the presence of two asymptotic modes of P(0), which are characterized by different power laws. The critical scale, on which the properties of P(0) change, corresponds, presumably, to the scales of the Larmor radius of ions. Based on the results of studying structural functions of various orders, the conclusion is drawn that small-scale turbulence in the foreshock and magnetosheath is described by different phenomenological models.
Chugunova O. M.
Kozak L. V.
Kozak P. N.
Pilipenko V. A.
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