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DOI: 10.1002/2016GL070404
Observations of large-amplitude, parallel, electrostatic waves associated with the Kelvin-Helmholtz instability by the magnetospheric multiscale mission
Author: Wilder F.D.; Ergun R.E.; Schwartz S.J.; Newman D.L.; Eriksson S.; Stawarz J.E.; Goldman M.V.; Goodrich K.A.; Gershman D.J.; Malaspina D.M.; Holmes J.C.; Sturner A.P.; Burch J.L.; Torbert R.B.; Lindqvist P.-A.; Marklund G.T.; Khotyaintsev Y.; Strangeway R.J.; Russell C.T.; Pollock C.J.; Giles B.L.; Dorrelli J.C.; Avanov L.A.; Patterson W.R.; Plaschke F.; Magnes W.
Source Publication: Geophysical Research Letters
ISSN: 0094-8664
EISSN: 1944-8395
Publishing Year: 2016
Volume: 43, Issue:17
pages begin: 8859
pages end: 8866
Language: 英语
Keyword: boundary layer ; electrostatic waves ; Kelvin-Helmholtz ; turbulence
Scopus Keyword: Boundary layers ; Electric field effects ; Electric fields ; Electrostatics ; Magnetosphere ; Plasma turbulence ; Spacecraft ; Turbulence ; Electrostatic waves ; Ion plasma frequency ; Kelvin- helmholtz instabilities ; Kelvin-Helmholtz ; Magnetospheric multi scale ; Magnetospheric multiscale missions ; Multiple particles ; Stability analysis ; Atmospheric thermodynamics ; amplitude ; boundary layer ; electric field ; Kelvin-Helmholtz instability ; magnetic field ; magnetopause ; magnetosphere ; observational method ; plasma ; spacecraft ; stability analysis ; turbulence
English 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. ©2016. American Geophysical Union. All Rights Reserved.
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Document Type: 期刊论文
Appears in Collections:科学计划与规划

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Affiliation: Laboratory of Atmospheric and Space Physics, University of Colorado Boulder, Boulder, CO, United States

Recommended Citation:
Wilder F.D.,Ergun R.E.,Schwartz S.J.,et al. Observations of large-amplitude, parallel, electrostatic waves associated with the Kelvin-Helmholtz instability by the magnetospheric multiscale mission[J]. Geophysical Research Letters,2016-01-01,43(17).
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