Universal scaling laws for fully-developed magnetic field turbulence near and far upstream of the Earth’s bow shock |
| |
Authors: | Rodrigo A. Miranda Abraham C.-L. Chian Erico L. Rempel |
| |
Affiliation: | 1. Institute of Aeronautical Technology (ITA) and World Institute for Space Environment Research (WISER), São José dos Campos-SP 12228-900, Brazil;2. University of Brasília (UnB), Faculty of Technology, Campus Gama, Brasília-DF 70910-900, Brazil;3. National Institute for Space Research (INPE) and World Institute for Space Environment Research (WISER), São José dos Campos-SP 12227-010, Brazil;4. Observatoire de Paris, LESIA, CNRS, 92195 Meudon, France |
| |
Abstract: | We analyze the multifractal scaling of the modulus of the interplanetary magnetic field near and far upstream of the Earth’s bow shock, measured by Cluster and ACE, respectively, from 1 to 3 February 2002. The maximum order of the structure function is carefully estimated for each time series using two different techniques, to ensure the validity of our high-order statistics. The first technique consists of plotting the integrand of the pth order structure function, and the second technique is a quantitative method which relies on the power-law scaling of the extreme events. We compare the scaling exponents computed from the structure functions of magnetic field differences with the predictions obtained by the She–Lévêque model of intermittency in anisotropic magnetohydrodynamic turbulence. Our results show a good agreement between the model and the observations near and far upstream of the Earth’s bow shock, rendering support for the modelling of universal scaling laws based on the Kolmogorov phenomenology in the presence of sheet-like dissipative structures. |
| |
Keywords: | Solar wind plasma Turbulence Intermittency Fractal and multifractal systems |
本文献已被 ScienceDirect 等数据库收录! |
|