Observation of Electric Field Enhancement at Ion Composition Boundary at Mars and Its Relation to Oxygen Acceleration
Abstract Direct electric field measurements during certain ionosphere‐magnetosheath transitions on the dayside of Mars reveal a presence of localized (<20 km thickness along vertical direction) strong (>40 mV/m) electric field located at the solar wind stagnation point. This electric field is...
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| Format: | Article |
| Language: | English |
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Wiley
2025-02-01
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| Series: | Geophysical Research Letters |
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| Online Access: | https://doi.org/10.1029/2024GL113584 |
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| author | Sergey D. Shuvalov Laila Andersson Kathleen Gwen Hanley Jasper S. Halekas David L. Mitchell Jared R. Espley |
| author_facet | Sergey D. Shuvalov Laila Andersson Kathleen Gwen Hanley Jasper S. Halekas David L. Mitchell Jared R. Espley |
| author_sort | Sergey D. Shuvalov |
| collection | DOAJ |
| description | Abstract Direct electric field measurements during certain ionosphere‐magnetosheath transitions on the dayside of Mars reveal a presence of localized (<20 km thickness along vertical direction) strong (>40 mV/m) electric field located at the solar wind stagnation point. This electric field is nearly collocated with the ion composition boundary where ionospheric oxygen ions are observed to be accelerated up to ∼1 keV, forming a layer of higher temperature plasma around the stagnation point. Simulations demonstrate that the observed localized electric field enhancement can create this hotter plasma layer population on either side of the boundary. This plasma layer can have an impact on the solar wind coupling with the planet and forms a reservoir for heavy ion escape. |
| format | Article |
| id | doaj-art-efc5cf0d5434417cadfa547f4c8498b8 |
| institution | OA Journals |
| issn | 0094-8276 1944-8007 |
| language | English |
| publishDate | 2025-02-01 |
| publisher | Wiley |
| record_format | Article |
| series | Geophysical Research Letters |
| spelling | doaj-art-efc5cf0d5434417cadfa547f4c8498b82025-08-20T02:31:09ZengWileyGeophysical Research Letters0094-82761944-80072025-02-01524n/an/a10.1029/2024GL113584Observation of Electric Field Enhancement at Ion Composition Boundary at Mars and Its Relation to Oxygen AccelerationSergey D. Shuvalov0Laila Andersson1Kathleen Gwen Hanley2Jasper S. Halekas3David L. Mitchell4Jared R. Espley5Laboratory for Atmospheric and Space Physics University of Colorado Boulder CO USALaboratory for Atmospheric and Space Physics University of Colorado Boulder CO USASpace Sciences Laboratory University of California Berkeley Berkeley CA USADepartment of Physics and Astronomy The University of Iowa Iowa City IA USASpace Sciences Laboratory University of California Berkeley Berkeley CA USANASA Goddard Space Flight Center Laboratory for Planetary Magnetospheres Greenbelt MD USAAbstract Direct electric field measurements during certain ionosphere‐magnetosheath transitions on the dayside of Mars reveal a presence of localized (<20 km thickness along vertical direction) strong (>40 mV/m) electric field located at the solar wind stagnation point. This electric field is nearly collocated with the ion composition boundary where ionospheric oxygen ions are observed to be accelerated up to ∼1 keV, forming a layer of higher temperature plasma around the stagnation point. Simulations demonstrate that the observed localized electric field enhancement can create this hotter plasma layer population on either side of the boundary. This plasma layer can have an impact on the solar wind coupling with the planet and forms a reservoir for heavy ion escape.https://doi.org/10.1029/2024GL113584Marsion composition boundarymagnetopausesolar wind |
| spellingShingle | Sergey D. Shuvalov Laila Andersson Kathleen Gwen Hanley Jasper S. Halekas David L. Mitchell Jared R. Espley Observation of Electric Field Enhancement at Ion Composition Boundary at Mars and Its Relation to Oxygen Acceleration Geophysical Research Letters Mars ion composition boundary magnetopause solar wind |
| title | Observation of Electric Field Enhancement at Ion Composition Boundary at Mars and Its Relation to Oxygen Acceleration |
| title_full | Observation of Electric Field Enhancement at Ion Composition Boundary at Mars and Its Relation to Oxygen Acceleration |
| title_fullStr | Observation of Electric Field Enhancement at Ion Composition Boundary at Mars and Its Relation to Oxygen Acceleration |
| title_full_unstemmed | Observation of Electric Field Enhancement at Ion Composition Boundary at Mars and Its Relation to Oxygen Acceleration |
| title_short | Observation of Electric Field Enhancement at Ion Composition Boundary at Mars and Its Relation to Oxygen Acceleration |
| title_sort | observation of electric field enhancement at ion composition boundary at mars and its relation to oxygen acceleration |
| topic | Mars ion composition boundary magnetopause solar wind |
| url | https://doi.org/10.1029/2024GL113584 |
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