دورية أكاديمية
Ion‐Acoustic Waves Associated With Interplanetary Shocks
| العنوان: | Ion‐Acoustic Waves Associated With Interplanetary Shocks |
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| المؤلفون: | J. J. Boldú, D. B. Graham, M. Morooka, M. André, Yu. V. Khotyaintsev, A. Dimmock, D. Píša, J. Souček, M. Maksimovic, P. Louarn, A. Fedorov, G. Nicolaou, C. Owen |
| المصدر: | Geophysical Research Letters, Vol 51, Iss 16, Pp n/a-n/a (2024) |
| بيانات النشر: | Wiley, 2024. |
| سنة النشر: | 2024 |
| المجموعة: | LCC:Geophysics. Cosmic physics |
| مصطلحات موضوعية: | collisionless shock, plasma waves, instabilities, Geophysics. Cosmic physics, QC801-809 |
| الوصف: | Abstract Ion‐acoustic waves (IAWs) commonly occur near interplanetary (IP) shocks. These waves are important because of their potential role in the dissipation required for collisionless shocks to exist. We study IAW occurrence statistically at different heliocentric distances using Solar Orbiter to identify the processes responsible for IAW generation near IP shocks. We show that close to IP shocks the occurrence rate of IAW increases and peaks at the ramp. In the upstream region, the IAW activity is highly variable among different shocks and increases with decreasing distance from the Sun. We show that the observed currents near IP shocks are insufficient to reach the threshold for the current‐driven instability. We argue that two‐stream proton distributions and suprathermal electrons are likely sources of the waves. |
| نوع الوثيقة: | article |
| وصف الملف: | electronic resource |
| اللغة: | English |
| تدمد: | 1944-8007 0094-8276 |
| Relation: | https://doaj.org/toc/0094-8276; https://doaj.org/toc/1944-8007 |
| DOI: | 10.1029/2024GL109956 |
| URL الوصول: | https://doaj.org/article/c105c669365c41ad8d6fa3a43f0dacb8 |
| رقم الأكسشن: | edsdoj.105c669365c41ad8d6fa3a43f0dacb8 |
| قاعدة البيانات: | Directory of Open Access Journals |
Full Text Finder | تدمد: | 19448007 00948276 |
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| DOI: | 10.1029/2024GL109956 |