國立中央大學大氣科學學系系友會

演講主題：Plasma environment in the lunar wake observed by SELENE (KAGUYA)  



活動時間 ：  2009-02-13 14:00 

地　　點 ： 科四館S4-811 

講　　師 ： 西野真木 博士  



內容綱要：

A quasi vacuum wake is formed behind the moon in the solar wind (SW), and a part of SW electrons having higher thermal speeds than ions come into the wake more easily than SW ions. The resultant electron-rich status of the wake yields a bipolar (inward) electric field at the wake boundary, which is believed to gradually accelerate SW ions toward the wake center. Here we show energy gain and loss of the SW ions coming into the lunar wake observed by SELENE (KAGUYA) spacecraft at about 100 km altitude. Ion Larmor motions and inward electric field around the lunar wake result in energy gain and loss of the SW ions. Our result shows emergence of proton particle dynamics around the near-moon space, and suggests that the SW ions may relatively easily access to the low-latitude and low-altitude region on the lunar night side.







公告單位：中大太空所