Polarization Analysis of Type III Langmuir/Z-mode Waves with Coherent Magnetic Component Observations by Solar Orbiter
Observations from the Solar Orbiter spacecraft provide unique insights into the interaction between electron beams and the plasma background in the source regions of type III radio emissions. We analyze this interaction by examining the high-frequency electric and magnetic components of in situ wave...
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IOP Publishing
2025-01-01
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| Series: | The Astrophysical Journal Letters |
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| Online Access: | https://doi.org/10.3847/2041-8213/add687 |
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| author | Tomáš Formánek Ondřej Santolík Jan Souček David Píša Arnaud Zaslavsky Matthieu Kretzschmar Milan Maksimovic Christopher J. Owen Georgios Nicolaou |
| author_facet | Tomáš Formánek Ondřej Santolík Jan Souček David Píša Arnaud Zaslavsky Matthieu Kretzschmar Milan Maksimovic Christopher J. Owen Georgios Nicolaou |
| author_sort | Tomáš Formánek |
| collection | DOAJ |
| description | Observations from the Solar Orbiter spacecraft provide unique insights into the interaction between electron beams and the plasma background in the source regions of type III radio emissions. We analyze this interaction by examining the high-frequency electric and magnetic components of in situ wave measurements, focusing on their polarization properties. Using electron data from onboard instruments, we model the electron velocity distribution function and numerically solve the dispersion relation. We compare the predicted polarization of the electric and magnetic components with the observations. Our findings are consistent with propagation in the Langmuir/Z-mode at an oblique wavevector. We explain the magnetic component and transverse polarization by the presence of small density fluctuations, without the need for mode conversion. |
| format | Article |
| id | doaj-art-4b63ca9e51b7465db8f95d332d1cd1c9 |
| institution | Kabale University |
| issn | 2041-8205 |
| language | English |
| publishDate | 2025-01-01 |
| publisher | IOP Publishing |
| record_format | Article |
| series | The Astrophysical Journal Letters |
| spelling | doaj-art-4b63ca9e51b7465db8f95d332d1cd1c92025-08-20T03:53:51ZengIOP PublishingThe Astrophysical Journal Letters2041-82052025-01-019852L2910.3847/2041-8213/add687Polarization Analysis of Type III Langmuir/Z-mode Waves with Coherent Magnetic Component Observations by Solar OrbiterTomáš Formánek0https://orcid.org/0000-0003-4766-638XOndřej Santolík1https://orcid.org/0000-0002-4891-9273Jan Souček2https://orcid.org/0000-0003-0462-6804David Píša3https://orcid.org/0000-0002-1322-7576Arnaud Zaslavsky4https://orcid.org/0000-0001-8543-9431Matthieu Kretzschmar5https://orcid.org/0000-0001-5796-6138Milan Maksimovic6https://orcid.org/0000-0001-6172-5062Christopher J. Owen7https://orcid.org/0000-0002-5982-4667Georgios Nicolaou8https://orcid.org/0000-0003-3623-4928Czech Academy of Sciences, Institute of Atmospheric Physics , Department of Space Physics, Boční II 1401, Prague 4, Czechia ; tomas.formanek@obspm.fr; LIRA, Observatoire de Paris, Université PSL , CNRS, Sorbonne Université, Université Paris-Cité, Meudon, FranceCzech Academy of Sciences, Institute of Atmospheric Physics , Department of Space Physics, Boční II 1401, Prague 4, Czechia ; tomas.formanek@obspm.fr; Charles University , Faculty of Mathematics and Physics, V Holesovickach 2, 18000 Prague 8, CzechiaCzech Academy of Sciences, Institute of Atmospheric Physics , Department of Space Physics, Boční II 1401, Prague 4, Czechia ; tomas.formanek@obspm.frCzech Academy of Sciences, Institute of Atmospheric Physics , Department of Space Physics, Boční II 1401, Prague 4, Czechia ; tomas.formanek@obspm.frLIRA, Observatoire de Paris, Université PSL , CNRS, Sorbonne Université, Université Paris-Cité, Meudon, FranceLPC2E, OSUC, CNRS/University of Orléans/CNES , 3A avenue de la Recherche Scientifique, 45071 Orléans, FranceLIRA, Observatoire de Paris, Université PSL , CNRS, Sorbonne Université, Université Paris-Cité, Meudon, FranceMullard Space Science Laboratory, University College London , Holmbury St Mary, Dorking, Surrey RH5 6NT, UKMullard Space Science Laboratory, University College London , Holmbury St Mary, Dorking, Surrey RH5 6NT, UKObservations from the Solar Orbiter spacecraft provide unique insights into the interaction between electron beams and the plasma background in the source regions of type III radio emissions. We analyze this interaction by examining the high-frequency electric and magnetic components of in situ wave measurements, focusing on their polarization properties. Using electron data from onboard instruments, we model the electron velocity distribution function and numerically solve the dispersion relation. We compare the predicted polarization of the electric and magnetic components with the observations. Our findings are consistent with propagation in the Langmuir/Z-mode at an oblique wavevector. We explain the magnetic component and transverse polarization by the presence of small density fluctuations, without the need for mode conversion.https://doi.org/10.3847/2041-8213/add687Solar radio emissionSolar windSpace plasmasPlasma physics |
| spellingShingle | Tomáš Formánek Ondřej Santolík Jan Souček David Píša Arnaud Zaslavsky Matthieu Kretzschmar Milan Maksimovic Christopher J. Owen Georgios Nicolaou Polarization Analysis of Type III Langmuir/Z-mode Waves with Coherent Magnetic Component Observations by Solar Orbiter The Astrophysical Journal Letters Solar radio emission Solar wind Space plasmas Plasma physics |
| title | Polarization Analysis of Type III Langmuir/Z-mode Waves with Coherent Magnetic Component Observations by Solar Orbiter |
| title_full | Polarization Analysis of Type III Langmuir/Z-mode Waves with Coherent Magnetic Component Observations by Solar Orbiter |
| title_fullStr | Polarization Analysis of Type III Langmuir/Z-mode Waves with Coherent Magnetic Component Observations by Solar Orbiter |
| title_full_unstemmed | Polarization Analysis of Type III Langmuir/Z-mode Waves with Coherent Magnetic Component Observations by Solar Orbiter |
| title_short | Polarization Analysis of Type III Langmuir/Z-mode Waves with Coherent Magnetic Component Observations by Solar Orbiter |
| title_sort | polarization analysis of type iii langmuir z mode waves with coherent magnetic component observations by solar orbiter |
| topic | Solar radio emission Solar wind Space plasmas Plasma physics |
| url | https://doi.org/10.3847/2041-8213/add687 |
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