Electromagnetic Landau Resonance: MMS Observations
Abstract Theoretical analysis has revealed a specific resonance that shares the same condition as Landau resonance, but instead involves wave electromagnetic fields rather than traditionally electrostatic fields. While this resonance, referred to as electromagnetic Landau resonance due to its proper...
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| Main Authors: | , , , , , |
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| Format: | Article |
| Language: | English |
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Wiley
2024-03-01
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| Series: | Geophysical Research Letters |
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| Online Access: | https://doi.org/10.1029/2023GL105734 |
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| author | Z.‐Y. Liu Q.‐G. Zong Y.‐F. Wang X.‐Z. Zhou S. Wang J.‐H. Li |
| author_facet | Z.‐Y. Liu Q.‐G. Zong Y.‐F. Wang X.‐Z. Zhou S. Wang J.‐H. Li |
| author_sort | Z.‐Y. Liu |
| collection | DOAJ |
| description | Abstract Theoretical analysis has revealed a specific resonance that shares the same condition as Landau resonance, but instead involves wave electromagnetic fields rather than traditionally electrostatic fields. While this resonance, referred to as electromagnetic Landau resonance due to its properties, is considered significant for magnetospheric dynamics, rare reports or evaluations based on observations have been made thus far. Here, we present an event detected by the Magnetospheric Multiscale mission near the dayside magnetopause. During this event, ∼748‐eV protons are observed to be in resonance with a wave. Detailed data analysis demonstrates the resonant velocity closely matches the wave's parallel phase speed, which, combined with the significant work done by wave perpendicular electric field, confirms this interaction as electromagnetic Landau resonance. Further investigation indicates these protons are being secularly accelerated within this resonance. Consequently, our observations provide the first empirical evidence supporting the previously suggested theoretical importance of the electromagnetic Landau resonance. |
| format | Article |
| id | doaj-art-add82acdcb0e43ec91f5f837af9eefd6 |
| institution | OA Journals |
| issn | 0094-8276 1944-8007 |
| language | English |
| publishDate | 2024-03-01 |
| publisher | Wiley |
| record_format | Article |
| series | Geophysical Research Letters |
| spelling | doaj-art-add82acdcb0e43ec91f5f837af9eefd62025-08-20T02:31:37ZengWileyGeophysical Research Letters0094-82761944-80072024-03-01516n/an/a10.1029/2023GL105734Electromagnetic Landau Resonance: MMS ObservationsZ.‐Y. Liu0Q.‐G. Zong1Y.‐F. Wang2X.‐Z. Zhou3S. Wang4J.‐H. Li5Institute of Space Physics and Applied Technology Peking University Beijing ChinaInstitute of Space Physics and Applied Technology Peking University Beijing ChinaInstitute of Space Physics and Applied Technology Peking University Beijing ChinaInstitute of Space Physics and Applied Technology Peking University Beijing ChinaInstitute of Space Physics and Applied Technology Peking University Beijing ChinaInstitute of Space Physics and Applied Technology Peking University Beijing ChinaAbstract Theoretical analysis has revealed a specific resonance that shares the same condition as Landau resonance, but instead involves wave electromagnetic fields rather than traditionally electrostatic fields. While this resonance, referred to as electromagnetic Landau resonance due to its properties, is considered significant for magnetospheric dynamics, rare reports or evaluations based on observations have been made thus far. Here, we present an event detected by the Magnetospheric Multiscale mission near the dayside magnetopause. During this event, ∼748‐eV protons are observed to be in resonance with a wave. Detailed data analysis demonstrates the resonant velocity closely matches the wave's parallel phase speed, which, combined with the significant work done by wave perpendicular electric field, confirms this interaction as electromagnetic Landau resonance. Further investigation indicates these protons are being secularly accelerated within this resonance. Consequently, our observations provide the first empirical evidence supporting the previously suggested theoretical importance of the electromagnetic Landau resonance.https://doi.org/10.1029/2023GL105734wave‐particle interactionsresonanceAlfven wavesion dynamicsmagnetosphere |
| spellingShingle | Z.‐Y. Liu Q.‐G. Zong Y.‐F. Wang X.‐Z. Zhou S. Wang J.‐H. Li Electromagnetic Landau Resonance: MMS Observations Geophysical Research Letters wave‐particle interactions resonance Alfven waves ion dynamics magnetosphere |
| title | Electromagnetic Landau Resonance: MMS Observations |
| title_full | Electromagnetic Landau Resonance: MMS Observations |
| title_fullStr | Electromagnetic Landau Resonance: MMS Observations |
| title_full_unstemmed | Electromagnetic Landau Resonance: MMS Observations |
| title_short | Electromagnetic Landau Resonance: MMS Observations |
| title_sort | electromagnetic landau resonance mms observations |
| topic | wave‐particle interactions resonance Alfven waves ion dynamics magnetosphere |
| url | https://doi.org/10.1029/2023GL105734 |
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