Solar Wind Interaction with the Magnetospheres of Earth, Mercury, and Our Moon
學年 115
學期 1
發表日期 2026-08-02
作品名稱 Solar Wind Interaction with the Magnetospheres of Earth, Mercury, and Our Moon
作品名稱（其他語言）
著者 Shu-Hua Lai; Chun-Wei Huang; Ting-Hsuan Hung; Kaiti Wang; Ya-Hui Yang; Yung-Ching Wang; Wing-Huen Ip
作品所屬單位
出版者
會議名稱 AOGS 23rd Annual Meeting
會議地點 Fukuoka, Japan
摘要 Physical dynamics processes within planetary magnetospheres, driven by interactions with the solar wind, constitute key observational targets for many planetary exploration missions. Understanding how energy and momentum are transferred during solar wind–magnetosphere interactions, therefore, requires not only high-resolution measurements and multi-satellite conjunction observations, but also comprehensive theoretical models. Using magnetohydrodynamic (MHD) simulations constrained by observational data, we qualitatively demonstrate that the solar wind’s energy and momentum can be efficiently transported away from the magnetopauses of Earth and Mercury through the Kelvin–Helmholtz instability (KHI). We also quantify the energy and momentum carried by KHI-induced fast-mode waves and estimate their contribution to inner magnetospheres. Our results indicate that fast-mode plane waves associated with KHI at planetary magnetopauses provide an efficient pathway for energy transport into the inner magnetosphere. Based on MESSENGER’s measurements, observational evidence for the existence of KHI-induced fast-mode plane waves is obtained from constructing the KHI wave-steepening directions. For weakly magnetized bodies such as the Moon, strong localized crustal magnetic fields (lunar magnetic anomalies) can partially shield the solar wind and form so-called “mini-magnetospheres”. KHI can also develop within the boundary layers of these mini-magnetospheres and may serve as a mechanism for generating the “shock-like” external magnetic enhancements observed above the lunar surface, even at altitudes of 800 km. We further show that the fast-mode Mach number plays a significant role in modulating KHI-related energy transport. Extremely low-Mach-number solar wind conditions are examined using data from the Helios and Parker Solar Probe (PSP) missions, where the key factor is the exceptionally low plasma density associated with compound transient structures. Under such conditions, planetary bow shocks may weaken or even vanish, exposing planetary magnetospheres directly to the solar wind. This interaction not only alters the evolution of KHI but may also indirectly trigger magnetic storm activity.
關鍵字 magnetosphere;Lunar magnetic anomalies;MHD waves;Solar-Wind Interactions;Kelvin-Helmholtz instability
語言 en
收錄於
會議性質 國際
校內研討會地點 無
研討會時間 20260802~20260807
通訊作者
國別 JPN
公開徵稿
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相關連結

機構典藏連結 ( http://tkuir.lib.tku.edu.tw:8080/dspace/handle/987654321/129747 )