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Observations of large-amplitude, parallel, electrostatic waves associated with the Kelvin-Helmholtz instability by the magnetospheric multiscale mission

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Title: Observations of large-amplitude, parallel, electrostatic waves associated with the Kelvin-Helmholtz instability by the magnetospheric multiscale mission
Author(s): Wilder, FD
Ergun, RE
Schwartz, SJ
Newman, DL
Eriksson, S
Stawarz, JE
Goldman, MV
Goodrich, KA
Gershman, DJ
Malaspina, DM
Holmes, JC
Sturner, AP
Burch, JL
Torbert, RB
Lindqvist, P-A
Marklund, GT
Khotyaintsev, Y
Strangeway, RJ
Russell, CT
Pollock, CJ
Giles, BL
Dorrelli, JC
Avanov, LA
Patterson, WR
Plaschke, F
Magnes, W
Item Type: Journal Article
Abstract: On 8 September 2015, the four Magnetospheric Multiscale spacecraft encountered a Kelvin-Helmholtz unstable magnetopause near the dusk flank. The spacecraft observed periodic compressed current sheets, between which the plasma was turbulent. We present observations of large-amplitude (up to 100 mV/m) oscillations in the electric field. Because these oscillations are purely parallel to the background magnetic field, electrostatic, and below the ion plasma frequency, they are likely to be ion acoustic-like waves. These waves are observed in a turbulent plasma where multiple particle populations are intermittently mixed, including cold electrons with energies less than 10 eV. Stability analysis suggests a cold electron component is necessary for wave growth.
Publication Date: 3-Sep-2016
Date of Acceptance: 10-Aug-2016
URI: http://hdl.handle.net/10044/1/42685
DOI: http://dx.doi.org/10.1002/2016GL070404
ISSN: 1944-8007
Publisher: American Geophysical Union (AGU)
Start Page: 8859
End Page: 8866
Journal / Book Title: Geophysical Research Letters
Volume: 43
Issue: 17
Copyright Statement: ©2016. American Geophysical Union. All Rights Reserved. Wilder, F. D., et al. (2016), Observations of large-amplitude, parallel, electrostatic waves associated with the Kelvin-Helmholtz instability by the magnetospheric multiscale mission, Geophys. Res. Lett., 43, 8859–8866, doi:10.1002/2016GL070404. To view the published open abstract, go to http://dx.doi.org/10.1002/2016GL070404
Keywords: Science & Technology
Physical Sciences
Geosciences, Multidisciplinary
Geology
Kelvin-Helmholtz
electrostatic waves
boundary layer
turbulence
LATITUDE BOUNDARY-LAYER
MAGNETIC RECONNECTION
PLASMA TRANSPORT
Meteorology & Atmospheric Sciences
MD Multidisciplinary
Publication Status: Published
Appears in Collections:Space and Atmospheric Physics
Physics
Faculty of Natural Sciences



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