Instruct: Identify the main and secondary category of Arxiv papers based on the titles and abstracts
Query: Intermittency in the solar wind turbulence through probability
  distribution functions of fluctuations   Intermittency in fluid turbulence can be emphasized through the analysis of
Probability Distribution Functions (PDF) for velocity fluctuations, which
display a strong non-gaussian behavior at small scales. Castaing et al. (1990)
have introduced the idea that this behavior can be represented, in the
framework of a multiplicative cascade model, by a convolution of gaussians
whose variances is distributed according to a log-normal distribution. In this
letter we have tried to test this conjecture on the MHD solar wind turbulence
by performing a fit of the PDF of the bulk speed and magnetic field intensity
fluctuations calculated in the solar wind, with the model. This fit allows us
to calculate a parameter depending on the scale, which represents the width of
the log-normal distribution of the variances of the gaussians. The physical
implications of the obtained values of the parameter as well as of its scaling
law are finally discussed

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The categories of this paper are: dg-ga
21
The categories of this paper are: adap-org
20
The categories of this paper are: acc-phys
18
The categories of this paper are: econ
15
The categories of this paper are: nucl-ex
37
The categories of this paper are: supr-con
29
The categories of this paper are: funct-an
33
The categories of this paper are: plasm-ph
13
The categories of this paper are: quant-ph
17
The categories of this paper are: q-fin
4
The categories of this paper are: cond-mat
12
The categories of this paper are: nucl-th
23
The categories of this paper are: solv-int
11
The categories of this paper are: hep-lat
5
The categories of this paper are: gr-qc
2
The categories of this paper are: math