Imperial College London
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Dr Lorenzo Matteini

Faculty of Natural Sciences, Department of Physics

Lecturer in Space Plasma Physics
 
 
 
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Contact

 

l.matteini

 
 
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Location

 

Blackett LaboratorySouth Kensington Campus

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Summary

 

Publications

Citation

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}
}
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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  -
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