金星-太阳风相互作用：不对称性和O+离子逃逸

Two-stream Plasma Instability as a Potential Mechanism for Particle Escape from the Venusian Ionosphere

In this work we investigate the possibility of two-stream instability in the Venusian atmosphere to lead to momentum transfer to subsequent escape of Hydrogen and Oxygen ions from the ionosphere. We employ the hydrodynamic model and obtain the linear dispersion relation from which the two-stream instability is studied. Further the interaction of solar wind with the ions of Venus ionosphere from which the instability sets in, has been studied with the data from ASPERA-4 of Venus Express (VEX). The data supports the fact that the two-stream instability can provide sufficient energy to accelerate…

Atmospheric Escape From TOI-700 d: Venus versus Earth Analogs

The recent discovery of an Earth-sized planet (TOI-700 d) in the habitable zone of an early-type M-dwarf by the Transiting Exoplanet Survey Satellite constitutes an important advance. In this Letter, we assess the feasibility of this planet to retain an atmosphere -- one of the chief ingredients for surface habitability -- over long timescales by employing state-of-the-art magnetohydrodynamic models to simulate the stellar wind and the associated rates of atmospheric escape. We take two major factors into consideration, namely, the planetary atmospheric composition and magnetic field. In all c…

金星弓激波与离子成分边界位置的驱动因素排名

Ranking the drivers of the Venusian bow shock and ion composition boundary locations

本文结合多种统计方法，分析排名金星弓激波与离子成分边界的驱动因素，明确两类边界的主要驱动因子，对比火星与金星的相关结果并分析极端偏移的驱动因素。

火星准垂直与准平行磁层鞘之间的磁场和等离子体不对称性

Magnetic Field and Plasma Asymmetries Between the Martian Quasi-Perpendicular and Quasi-Parallel Magnetosheaths

本研究利用MAVEN数据揭示火星磁层鞘中磁场和等离子体的不对称性，发现其受冲击几何和行星离子共同影响。

Is Proxima Centauri b habitable? -- A study of atmospheric loss

We address the important question of whether the newly discovered exoplanet, Proxima Centauri b (PCb), is capable of retaining an atmosphere over long periods of time. This is done by adapting a sophisticated multi-species MHD model originally developed for Venus and Mars, and computing the ion escape losses from PCb. The results suggest that the ion escape rates are about two orders of magnitude higher than the terrestrial planets of our Solar system if PCb is unmagnetized. In contrast, if the planet does have an intrinsic dipole magnetic field, the rates are lowered for certain values of the…

基于物理的神经网络用于建模火星诱导磁层

Physics-Informed Neural Networks for Modeling the Martian Induced Magnetosphere

本文利用基于物理的神经网络结合MAVEN观测，首次构建了火星诱导磁层磁场的数据驱动模型，揭示了磁场配置对日风参数的依赖关系。