Physics – Plasma Physics
Scientific paper
Dec 2009
adsabs.harvard.edu/cgi-bin/nph-data_query?bibcode=2009agufmsm43b1757c&link_type=abstract
American Geophysical Union, Fall Meeting 2009, abstract #SM43B-1757
Physics
Plasma Physics
[4440] Nonlinear Geophysics / Fractals And Multifractals, [7857] Space Plasma Physics / Stochastic Phenomena, [7863] Space Plasma Physics / Turbulence
Scientific paper
In the last two decades we experienced an increasing interest in investigating the occurrence of scale invariance and non-Gaussian statistics of fluctuations (increments) of magnetic field and plasma velocity in turbulent plasma regions. The emergence of anomalous dimensions in the scaling features of some quantities in the MHD domain was interpreted as the signature of intermittency. Here, after a brief review of the concepts of scale-invariance and intermittency, the stochastic features of some thermodynamic parameters (as temperature, etc) are investigated. In particular, the attention is focused on the occurrence or not of scaling features, intermittency, and on the shape of the probability density function of the fluctuations/increments of such quantities in different turbulent space plasma regions. Some thermodynamic considerations are presented.
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