@article{Matteini:2017:mnras/stw3163,
author = {Matteini, L and Alexandrova, O and Chen, CHK and Lacombe, C},
doi = {mnras/stw3163},
journal = {Monthly Notices of the Royal Astronomical Society},
pages = {945--951},
title = {Electric and magnetic spectra from MHD to electron scales in the magnetosheath},
url = {http://dx.doi.org/10.1093/mnras/stw3163},
volume = {466},
year = {2017}
}

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TY  - JOUR
AB  - We investigate the transition of the turbulence from large to kinetic scales using Cluster observations. Simultaneous spectra of magnetic and electric fields in the Earth's magnetosheath from magnetohydrodynamic (MHD) to electron scales are presented for the first time. While the two spectra have approximatively similar behaviour in the fluid-MHD regime, they show different trends in the kinetic range. As the magnetic field spectrum steepens at ion scales, the electric field spectrum is characterized by a shallower power law continuing down to electron scales. Such an evolution is consistent with theoretical expectations, assuming that the turbulence is dominated by highly oblique k-vectors and that between ion and electron scales the electric field is governed by the non-ideal terms in the generalized Ohm's law. This leads to an expected linear increase of the electric-to-magnetic ratio of fluctuations, consistent with observations presented here. The influence of local whistler wave activity on electron-scale spectra is also discussed.
AU  - Matteini,L
AU  - Alexandrova,O
AU  - Chen,CHK
AU  - Lacombe,C
DO  - mnras/stw3163
EP  - 951
PY  - 2017///
SN  - 0035-8711
SP  - 945
TI  - Electric and magnetic spectra from MHD to electron scales in the magnetosheath
T2  - Monthly Notices of the Royal Astronomical Society
UR  - http://dx.doi.org/10.1093/mnras/stw3163
UR  - http://hdl.handle.net/10044/1/44562
VL  - 466
ER  - 

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