Solar Wind Interaction with Non-Magnetic Planets

太阳风与太阳系天体直接相互作用，这些天体的内在磁场太小，无法保护它们的大气层和电离层。这项工作的重点是各种太阳风与非磁性太阳系天体，如金星、火星、土卫六、彗星和星际中性气体相互作用的理论模型。具体任务包括：(1)研究与太阳风/大气/电离层相互作用有关的X射线和极端紫外线辐射的空间和时间变化；(2)开发新的电子传输代码，以模拟超热电子在非磁性太阳系天体的等离子体环境中的行为；(3)分析火星和土卫六附近离子的测试粒子模拟，特别强调有限的陀螺半径效应。

The solar wind interacts directly with solar system bodies whose intrinsic magnetic fields are too small to protect their atmospheres and ionospheres. This effort focuses on the theoretical modeling of various solar wind interactions with non-magnetic solar systems bodies such as Venus, Mars, Titan, comets, and the interstellar neutral gas. Specific tasks include, (i) studies of spatial and temporal variations of X-ray and Extreme Ultra-violet emission associated solar wind/atmosphere/ionosphere interactions, (ii) development of a new electron transport code to model the behavior of super thermal electrons in the plasma environments of non-magnetic solar system bodies, and (iii) analysis of test-particle simulations for ions in the vicinity of Mars and Titan with special emphasis on finite gyro radius effects.