@article{Breuillard:2018:1538-4357/aabae8,
author = {Breuillard, H and Matteini, L and Argall, MR and Sahraoui, F and Andriopoulou, M and Le, Contel O and Retino, A and Mirioni, L and Huang, SY and Gershman, DJ and Ergun, RE and Wilder, FD and Goodrich, KA and Ahmadi, N and Yordanova, E and Vaivads, A and Turner, DL and Khotyaintsev, YV and Graham, DB and Lindqvist, P-A and Chasapis, A and Burch, JL and Torbert, RB and Russell, CT and Magnes, W and Strangeway, RJ and Plaschke, F and Moore, TE and Giles, BL and Paterson, WR and Pollock, CJ and Lavraud, B and Fuselier, SA and Cohen, IJ},
doi = {1538-4357/aabae8},
journal = {ASTROPHYSICAL JOURNAL},
title = {New Insights into the Nature of Turbulence in the Earth's Magnetosheath Using Magnetospheric MultiScale Mission Data},
url = {http://dx.doi.org/10.3847/1538-4357/aabae8},
volume = {859},
year = {2018}
}

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TY  - JOUR
AB  - The Earth's magnetosheath, which is characterized by highly turbulent fluctuations, is usually divided into two regions of different properties as a function of the angle between the interplanetary magnetic field and the shock normal. In this study, we make use of high-time resolution instruments on board the Magnetospheric MultiScale spacecraft to determine and compare the properties of subsolar magnetosheath turbulence in both regions, i.e., downstream of the quasi-parallel and quasi-perpendicular bow shocks. In particular, we take advantage of the unprecedented temporal resolution of the Fast Plasma Investigation instrument to show the density fluctuations down to sub-ion scales for the first time. We show that the nature of turbulence is highly compressible down to electron scales, particularly in the quasi-parallel magnetosheath. In this region, the magnetic turbulence also shows an inertial (Kolmogorov-like) range, indicating that the fluctuations are not formed locally, in contrast with the quasi-perpendicular magnetosheath. We also show that the electromagnetic turbulence is dominated by electric fluctuations at sub-ion scales (f > 1 Hz) and that magnetic and electric spectra steepen at the largest-electron scale. The latter indicates a change in the nature of turbulence at electron scales. Finally, we show that the electric fluctuations around the electron gyrofrequency are mostly parallel in the quasi-perpendicular magnetosheath, where intense whistlers are observed. This result suggests that energy dissipation, plasma heating, and acceleration might be driven by intense electrostatic parallel structures/waves, which can be linked to whistler waves.
AU  - Breuillard,H
AU  - Matteini,L
AU  - Argall,MR
AU  - Sahraoui,F
AU  - Andriopoulou,M
AU  - Le,Contel O
AU  - Retino,A
AU  - Mirioni,L
AU  - Huang,SY
AU  - Gershman,DJ
AU  - Ergun,RE
AU  - Wilder,FD
AU  - Goodrich,KA
AU  - Ahmadi,N
AU  - Yordanova,E
AU  - Vaivads,A
AU  - Turner,DL
AU  - Khotyaintsev,YV
AU  - Graham,DB
AU  - Lindqvist,P-A
AU  - Chasapis,A
AU  - Burch,JL
AU  - Torbert,RB
AU  - Russell,CT
AU  - Magnes,W
AU  - Strangeway,RJ
AU  - Plaschke,F
AU  - Moore,TE
AU  - Giles,BL
AU  - Paterson,WR
AU  - Pollock,CJ
AU  - Lavraud,B
AU  - Fuselier,SA
AU  - Cohen,IJ
DO  - 1538-4357/aabae8
PY  - 2018///
SN  - 0004-637X
TI  - New Insights into the Nature of Turbulence in the Earth's Magnetosheath Using Magnetospheric MultiScale Mission Data
T2  - ASTROPHYSICAL JOURNAL
UR  - http://dx.doi.org/10.3847/1538-4357/aabae8
UR  - http://gateway.webofknowledge.com/gateway/Gateway.cgi?GWVersion=2&SrcApp=PARTNER_APP&SrcAuth=LinksAMR&KeyUT=WOS:000433938500026&DestLinkType=FullRecord&DestApp=ALL_WOS&UsrCustomerID=1ba7043ffcc86c417c072aa74d649202
UR  - http://hdl.handle.net/10044/1/62057
VL  - 859
ER  - 

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