Magnetosheath and solar wind turbulence processes features identification

• Published in: Advances in Astronomy and Space Physics
• Date: 2015
• Main Authors: Prokhorenkov, A.S., Kozak, L.V., Lui, A.T.Y.
• Format: Article
• Language: English
• Published: Головна астрономічна обсерваторія НАН України 2015
• Online Access: https://nasplib.isofts.kiev.ua/handle/123456789/119934
• Journal Title: Digital Library of Periodicals of National Academy of Sciences of Ukraine
• Cite this: Magnetosheath and solar wind turbulence processes features identification / A.S. Prokhorenkov, L.V. Kozak, A.T.Y. Lui // Advances in Astronomy and Space Physics. — 2015. — Т. 5., вип. 2. — С. 93-98. — Бібліогр.: 14 назв. — англ.

A different kind of analysis should be applied to a turbulent process, than that applied to a nondisturbed medium. In this work we present the result of extended self-similarity analysis (ESS) by comparing between different turbulent models: Kolmogorov K41 model, She-Leveque (isotropic log-Poisson model) of order 3; Iroshnikov-Kraichnan model and Politano-Pouquet model of order 4. Two regimes were observed for large and small times ales: the Gaussian distribution was used for small times ales for magnetic field fluctuation probability distribution function (PDF), and the Lèvy distribution was used for large-scale timescale non-Gaussian distributions. The intersection of two asymptotes corresponds to approximately 1 s, which agrees with the ion-cyclotron period.