On the Efficiency of the Linear-mode Conversion for Generation of Solar Type III Radio Bursts
| العنوان: | On the Efficiency of the Linear-mode Conversion for Generation of Solar Type III Radio Bursts |
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| المؤلفون: | Andrii Voshchepynets, Milan Maksimovic, Vladimir Krasnoselskikh |
| المساهمون: | Laboratoire de Physique et Chimie de l'Environnement et de l'Espace (LPC2E), Observatoire des Sciences de l'Univers en région Centre (OSUC), Institut national des sciences de l'Univers (INSU - CNRS)-Observatoire de Paris, Université Paris sciences et lettres (PSL)-Université Paris sciences et lettres (PSL)-Université d'Orléans (UO)-Centre National de la Recherche Scientifique (CNRS)-Institut national des sciences de l'Univers (INSU - CNRS)-Observatoire de Paris, Université Paris sciences et lettres (PSL)-Université Paris sciences et lettres (PSL)-Université d'Orléans (UO)-Centre National de la Recherche Scientifique (CNRS)-Centre National d’Études Spatiales [Paris] (CNES), Swedish Institute of Space Physics [Kiruna] (IRF), Laboratoire d'études spatiales et d'instrumentation en astrophysique (LESIA (UMR_8109)), Université Paris sciences et lettres (PSL)-Université Paris sciences et lettres (PSL)-Université Paris Diderot - Paris 7 (UPD7)-Sorbonne Université (SU)-Centre National de la Recherche Scientifique (CNRS) |
| المصدر: | The Astrophysical Journal The Astrophysical Journal, American Astronomical Society, 2019, 879 (1), pp.51. ⟨10.3847/1538-4357/ab22bf⟩ |
| بيانات النشر: | HAL CCSD, 2019. |
| سنة النشر: | 2019 |
| مصطلحات موضوعية: | 010504 meteorology & atmospheric sciences, Electron, Plasma oscillation, 7. Clean energy, 01 natural sciences, Physics::Plasma Physics, Sun: particle emission, 0103 physical sciences, Energy transformation, 010303 astronomy & astrophysics, 0105 earth and related environmental sciences, acceleration of particles, Physics, Sun: radio radiation, Mode (statistics), Astronomy and Astrophysics, Computational physics, Solar wind, solar wind, Space and Planetary Science, [SDU]Sciences of the Universe [physics], Brightness temperature, Physics::Space Physics, Reflection (physics), [PHYS.ASTR]Physics [physics]/Astrophysics [astro-ph], Energy (signal processing) |
| الوصف: | International audience; Type III solar radio bursts are generated by streams of energetic electrons accelerated at the Sun during periods of solar activity. The generation occurs in two steps. Initially, electron beams generate electrostatic Langmuir waves and then these waves are transformed into electromagnetic emissions. Recent studies showed that the level of density fluctuations in the solar wind and in the solar corona is so high that it may significantly affect beam-plasma interaction. Here, we show that the presence of intense density fluctuations not only crucially influences the process of beam-plasma interaction, but also changes the mechanism of energy transfer from electrostatic waves into electromagnetic. Reflection of the Langmuir waves from the density inhomogeneities may result in partial transformation of the energy of electrostatic waves into electromagnetic around plasma frequency. We show that the linear wave energy transformation for the level of fluctuations of the order of 1% or higher is efficient enough to produce radio bursts with a brightness temperature of 10(14)-10(15) K. |
| اللغة: | English |
| تدمد: | 0004-637X 1538-4357 |
| URL الوصول: | https://explore.openaire.eu/search/publication?articleId=doi_dedup___::5327d420151e27a507f51d218f5d9e92 https://hal-insu.archives-ouvertes.fr/insu-02519403 |
| حقوق: | OPEN |
| رقم الأكسشن: | edsair.doi.dedup.....5327d420151e27a507f51d218f5d9e92 |
| قاعدة البيانات: | OpenAIRE |
| تدمد: | 0004637X 15384357 |
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