BibTex format
@article{Franci:2020:1538-4357/ab9a47,
author = {Franci, L and Stawarz, JE and Papini, E and Hellinger, P and Nakamura, T and Burgess, D and Landi, S and Verdini, A and Matteini, L and Ergun, R and Contel, OL and Lindqvist, P-A},
doi = {1538-4357/ab9a47},
journal = {The Astrophysical Journal},
title = {Modeling MMS observations at the Earth's magnetopause with hybrid simulations of Alfvénic turbulence},
url = {http://dx.doi.org/10.3847/1538-4357/ab9a47},
volume = {898},
year = {2020}
}
RIS format (EndNote, RefMan)
TY - JOUR
AB - Magnetospheric Multiscale (MMS) observations of plasma turbulence generated by a Kelvin–Helmholtz (KH) event at the Earth's magnetopause are compared with a high-resolution two-dimensional (2D) hybrid direct numerical simulation of decaying plasma turbulence driven by large-scale balanced Alfvénic fluctuations. The simulation, set up with four observation-driven physical parameters (ion and electron betas, turbulence strength, and injection scale), exhibits a quantitative agreement on the spectral, intermittency, and cascade-rate properties with in situ observations, despite the different driving mechanisms. Such agreement demonstrates a certain universality of the turbulent cascade from magnetohydrodynamic to sub-ion scales, whose properties are mainly determined by the selected parameters, also indicating that the KH instability-driven turbulence has a quasi-2D nature. The fact that our results are compatible with the validity of the Taylor hypothesis, in the whole range of scales investigated numerically, suggests that the fluctuations at sub-ion scales might have predominantly low frequencies. This would be consistent with a kinetic Alfvén wave-like nature and/or with the presence of quasi-static structures. Finally, the third-order structure function analysis indicates that the cascade rate of the turbulence generated by a KH event at the magnetopause is an order of magnitude larger than in the ambient magnetosheath.
AU - Franci,L
AU - Stawarz,JE
AU - Papini,E
AU - Hellinger,P
AU - Nakamura,T
AU - Burgess,D
AU - Landi,S
AU - Verdini,A
AU - Matteini,L
AU - Ergun,R
AU - Contel,OL
AU - Lindqvist,P-A
DO - 1538-4357/ab9a47
PY - 2020///
SN - 0004-637X
TI - Modeling MMS observations at the Earth's magnetopause with hybrid simulations of Alfvénic turbulence
T2 - The Astrophysical Journal
UR - http://dx.doi.org/10.3847/1538-4357/ab9a47
UR - http://hdl.handle.net/10044/1/82304
VL - 898
ER -