Observations of large‐amplitude, parallel, electrostatic waves associated with the Kelvin‐Helmholtz instability by the magnetospheric multiscale mission
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...
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2016-09-01
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| Series: | Geophysical Research Letters |
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| Online Access: | https://doi.org/10.1002/2016GL070404 |
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| author | Victoria Wilder R. E. Ergun S. J. Schwartz D. L. Newman S. Eriksson J. E. Stawarz M. V. Goldman K. A. Goodrich D. J. Gershman D. M. Malaspina J. C. Holmes A. P. Sturner J. L. Burch R. B. Torbert P.‐A. Lindqvist G. T. Marklund Y. Khotyaintsev R. J. Strangeway C. T. Russell C. J. Pollock B. L. Giles J. C. Dorrelli L. A. Avanov W. R. Patterson F. Plaschke W. Magnes |
| author_facet | Victoria Wilder R. E. Ergun S. J. Schwartz D. L. Newman S. Eriksson J. E. Stawarz M. V. Goldman K. A. Goodrich D. J. Gershman D. M. Malaspina J. C. Holmes A. P. Sturner J. L. Burch R. B. Torbert P.‐A. Lindqvist G. T. Marklund Y. Khotyaintsev R. J. Strangeway C. T. Russell C. J. Pollock B. L. Giles J. C. Dorrelli L. A. Avanov W. R. Patterson F. Plaschke W. Magnes |
| author_sort | Victoria Wilder |
| collection | DOAJ |
| description | 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. |
| format | Article |
| id | doaj-art-2b765994811d4a458cffa7857a2f61ca |
| institution | DOAJ |
| issn | 0094-8276 1944-8007 |
| language | English |
| publishDate | 2016-09-01 |
| publisher | Wiley |
| record_format | Article |
| series | Geophysical Research Letters |
| spelling | doaj-art-2b765994811d4a458cffa7857a2f61ca2025-08-20T03:09:52ZengWileyGeophysical Research Letters0094-82761944-80072016-09-0143178859886610.1002/2016GL070404Observations of large‐amplitude, parallel, electrostatic waves associated with the Kelvin‐Helmholtz instability by the magnetospheric multiscale missionVictoria Wilder0R. E. Ergun1S. J. Schwartz2D. L. Newman3S. Eriksson4J. E. Stawarz5M. V. Goldman6K. A. Goodrich7D. J. Gershman8D. M. Malaspina9J. C. Holmes10A. P. Sturner11J. L. Burch12R. B. Torbert13P.‐A. Lindqvist14G. T. Marklund15Y. Khotyaintsev16R. J. Strangeway17C. T. Russell18C. J. Pollock19B. L. Giles20J. C. Dorrelli21L. A. Avanov22W. R. Patterson23F. Plaschke24W. Magnes25Laboratory of Atmospheric and Space Physics University of Colorado Boulder Boulder Colorado USALaboratory of Atmospheric and Space Physics University of Colorado Boulder Boulder Colorado USALaboratory of Atmospheric and Space Physics University of Colorado Boulder Boulder Colorado USADepartment of Physics University of Colorado Boulder Boulder Colorado USALaboratory of Atmospheric and Space Physics University of Colorado Boulder Boulder Colorado USALaboratory of Atmospheric and Space Physics University of Colorado Boulder Boulder Colorado USADepartment of Physics University of Colorado Boulder Boulder Colorado USALaboratory of Atmospheric and Space Physics University of Colorado Boulder Boulder Colorado USANASA Goddard Space Flight Center Greenbelt Maryland USALaboratory of Atmospheric and Space Physics University of Colorado Boulder Boulder Colorado USALaboratory of Atmospheric and Space Physics University of Colorado Boulder Boulder Colorado USALaboratory of Atmospheric and Space Physics University of Colorado Boulder Boulder Colorado USASouthwest Research Institute San Antonio Texas USADepartment of Physics University of New Hampshire Durham New Hampshire USARoyal Institute of Technology Stockholm SwedenRoyal Institute of Technology Stockholm SwedenSwedish Institute of Space Physics Uppsala SwedenDepartment of Earth and Space Sciences University of California Los Angeles California USADepartment of Earth and Space Sciences University of California Los Angeles California USANASA Goddard Space Flight Center Greenbelt Maryland USANASA Goddard Space Flight Center Greenbelt Maryland USANASA Goddard Space Flight Center Greenbelt Maryland USANASA Goddard Space Flight Center Greenbelt Maryland USANASA Goddard Space Flight Center Greenbelt Maryland USASpace Research Institute Austrian Academy of Sciences Graz AustriaSpace Research Institute Austrian Academy of Sciences Graz AustriaAbstract 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.https://doi.org/10.1002/2016GL070404Kelvin‐Helmholtzelectrostatic wavesboundary layerturbulence |
| spellingShingle | Victoria Wilder R. E. Ergun S. J. Schwartz D. L. Newman S. Eriksson J. E. Stawarz M. V. Goldman K. A. Goodrich D. J. Gershman D. M. Malaspina J. C. Holmes A. P. Sturner J. L. Burch R. B. Torbert P.‐A. Lindqvist G. T. Marklund Y. Khotyaintsev R. J. Strangeway C. T. Russell C. J. Pollock B. L. Giles J. C. Dorrelli L. A. Avanov W. R. Patterson F. Plaschke W. Magnes Observations of large‐amplitude, parallel, electrostatic waves associated with the Kelvin‐Helmholtz instability by the magnetospheric multiscale mission Geophysical Research Letters Kelvin‐Helmholtz electrostatic waves boundary layer turbulence |
| title | Observations of large‐amplitude, parallel, electrostatic waves associated with the Kelvin‐Helmholtz instability by the magnetospheric multiscale mission |
| title_full | Observations of large‐amplitude, parallel, electrostatic waves associated with the Kelvin‐Helmholtz instability by the magnetospheric multiscale mission |
| title_fullStr | Observations of large‐amplitude, parallel, electrostatic waves associated with the Kelvin‐Helmholtz instability by the magnetospheric multiscale mission |
| title_full_unstemmed | Observations of large‐amplitude, parallel, electrostatic waves associated with the Kelvin‐Helmholtz instability by the magnetospheric multiscale mission |
| title_short | Observations of large‐amplitude, parallel, electrostatic waves associated with the Kelvin‐Helmholtz instability by the magnetospheric multiscale mission |
| title_sort | observations of large amplitude parallel electrostatic waves associated with the kelvin helmholtz instability by the magnetospheric multiscale mission |
| topic | Kelvin‐Helmholtz electrostatic waves boundary layer turbulence |
| url | https://doi.org/10.1002/2016GL070404 |
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