Double Beam Instability for the Mercury Upstream Waves
Mercury shock-upstream region is plasma physically of great interest, as the solar wind plasma may encounter two ion beams, forming a double-beam plasma system. Properties of the double-beam instability are studied semianalytically using the magnetoionic theory (cold plasma waves including beams), s...
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| Format: | Article |
| Language: | English |
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IOP Publishing
2025-01-01
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| Series: | The Astrophysical Journal |
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| Online Access: | https://doi.org/10.3847/1538-4357/adc1bc |
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| author | Y. Narita U. Motschmann H. Comişel D. Schmid |
| author_facet | Y. Narita U. Motschmann H. Comişel D. Schmid |
| author_sort | Y. Narita |
| collection | DOAJ |
| description | Mercury shock-upstream region is plasma physically of great interest, as the solar wind plasma may encounter two ion beams, forming a double-beam plasma system. Properties of the double-beam instability are studied semianalytically using the magnetoionic theory (cold plasma waves including beams), such as the unstable mode, the resonance wavenumbers, and the growth rates, for various beam configurations. The cold plasma wave theory supports the idea that both the foreshock ions and the pickup ions can potentially drive the right-hand beam instability, and moreover, the instability may run simultaneously for the two beam species. Further nonlinear wave evolution scenarios are discussed, such as independent parametric instabilities and driven wave–wave couplings causing low-frequency and high-frequency splits of the waves. The double-beam instability is testable against numerical simulations of the plasma waves as well as magnetic field observations by the MESSENGER spacecraft and the upcoming BepiColombo spacecraft. |
| format | Article |
| id | doaj-art-afee3605c2b04a95a2d3d546bf0749de |
| institution | OA Journals |
| issn | 1538-4357 |
| language | English |
| publishDate | 2025-01-01 |
| publisher | IOP Publishing |
| record_format | Article |
| series | The Astrophysical Journal |
| spelling | doaj-art-afee3605c2b04a95a2d3d546bf0749de2025-08-20T02:16:10ZengIOP PublishingThe Astrophysical Journal1538-43572025-01-01983212510.3847/1538-4357/adc1bcDouble Beam Instability for the Mercury Upstream WavesY. Narita0https://orcid.org/0000-0002-5332-8881U. Motschmann1https://orcid.org/0000-0002-4909-3127H. Comişel2https://orcid.org/0000-0002-5028-8482D. Schmid3https://orcid.org/0000-0001-7818-4338Institute of Theoretical Physics, Technische Universität Braunschweig , Mendelssohnstr. 3, D-38106 Braunschweig, Germany; Max Planck Institute for Solar System Research , Justus-von-Liebig-Weg 3, D-37077 Göttingen, GermanyInstitute of Theoretical Physics, Technische Universität Braunschweig , Mendelssohnstr. 3, D-38106 Braunschweig, GermanyInstitute for Space Sciences , Atomiştilor 409, P.O. Box MG-23, Bucharest-Mǎgurele, RO-077125, RomaniaSpace Research Institute , Austrian Academy of Sciences, Schmiedlstr. 6, A-8042 Graz, AustriaMercury shock-upstream region is plasma physically of great interest, as the solar wind plasma may encounter two ion beams, forming a double-beam plasma system. Properties of the double-beam instability are studied semianalytically using the magnetoionic theory (cold plasma waves including beams), such as the unstable mode, the resonance wavenumbers, and the growth rates, for various beam configurations. The cold plasma wave theory supports the idea that both the foreshock ions and the pickup ions can potentially drive the right-hand beam instability, and moreover, the instability may run simultaneously for the two beam species. Further nonlinear wave evolution scenarios are discussed, such as independent parametric instabilities and driven wave–wave couplings causing low-frequency and high-frequency splits of the waves. The double-beam instability is testable against numerical simulations of the plasma waves as well as magnetic field observations by the MESSENGER spacecraft and the upcoming BepiColombo spacecraft.https://doi.org/10.3847/1538-4357/adc1bcSpace plasmasMercury (planet)Solar windPlanetary bow shocks |
| spellingShingle | Y. Narita U. Motschmann H. Comişel D. Schmid Double Beam Instability for the Mercury Upstream Waves The Astrophysical Journal Space plasmas Mercury (planet) Solar wind Planetary bow shocks |
| title | Double Beam Instability for the Mercury Upstream Waves |
| title_full | Double Beam Instability for the Mercury Upstream Waves |
| title_fullStr | Double Beam Instability for the Mercury Upstream Waves |
| title_full_unstemmed | Double Beam Instability for the Mercury Upstream Waves |
| title_short | Double Beam Instability for the Mercury Upstream Waves |
| title_sort | double beam instability for the mercury upstream waves |
| topic | Space plasmas Mercury (planet) Solar wind Planetary bow shocks |
| url | https://doi.org/10.3847/1538-4357/adc1bc |
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