@article{Franci:2015:2/L39,
author = {Franci, L and Verdini, A and Matteini, L and Landi, S and Hellinger, P},
doi = {2/L39},
journal = {Astrophysical Journal Letters},
title = {SOLAR WIND TURBULENCE FROM MHD TO SUB-ION SCALES: HIGH-RESOLUTION HYBRID SIMULATIONS},
url = {http://dx.doi.org/10.1088/2041-8205/804/2/L39},
volume = {804},
year = {2015}
}

Download

TY  - JOUR
AB  - We present results from a high-resolution and large-scale hybrid (fluid electrons and particle-in-cell protons) twodimensionalnumerical simulation of decaying turbulence. Two distinct spectral regions (separated by a smoothbreak at proton scales) develop with clear power-law scaling, each one occupying about a decade in wavenumbers.The simulation results simultaneously exhibit several properties of the observed solar wind fluctuations: spectralindices of the magnetic, kinetic, and residual energy spectra in the magnetohydrodynamic (MHD) inertial rangealong with a flattening of the electric field spectrum, an increase in magnetic compressibility, and a strong couplingof the cascade with the density and the parallel component of the magnetic fluctuations at sub-proton scales. Ourfindings support the interpretation that in the solar wind, large-scale MHD fluctuations naturally evolve beyondproton scales into a turbulent regime that is governed by the generalized Ohm’s law
AU  - Franci,L
AU  - Verdini,A
AU  - Matteini,L
AU  - Landi,S
AU  - Hellinger,P
DO  - 2/L39
PY  - 2015///
SN  - 2041-8213
TI  - SOLAR WIND TURBULENCE FROM MHD TO SUB-ION SCALES: HIGH-RESOLUTION HYBRID SIMULATIONS
T2  - Astrophysical Journal Letters
UR  - http://dx.doi.org/10.1088/2041-8205/804/2/L39
UR  - http://hdl.handle.net/10044/1/28177
VL  - 804
ER  - 

Download