论文标题
传入太阳颗粒辐射对火星外层的影响
Effect of Incoming Solar Particle Radiations on The Exosphere of Mars
论文作者
论文摘要
火星外层中性成分分析仪（MENCA）的火星轨道特派团（MOM）测量了火星的\ emph {situ}中性上层大气成分。火星较低的气氛主要由$ co_2 $的存在占主导地位，这些$ co_2 $在较高的高度附近，将照片解散到原子氧（$ o $）中。 Atomic $ o $ $在唤起火星电离层中$ O_2^+$的强大存在方面发挥了重要作用。主要的照片 - 散发性物种$ co_ {2} $，在无碰撞的异质气氛中，与原子$ o $跨越中性的丰度，局部太阳条件不同。来自中性气体和离子质谱仪（NGIM）仪器的初始测量仪器在火星大气和挥发性进化（MAVEN）上估计，在太阳最大条件下，这些交叉/过渡高度在太阳能最大条件下，在$ 225 km至240 km之间发动了这些高度。 MENCA sampled the neutral atmospheric species, below the exobase up to the periareion of $\approx$160 km, under low solar activity conditions during June 2018. Observations of partial pressures of $CO_2$ and $O$ in subsequent orbits reveals that solar inputs are crucial in quantifying these crossing points, where $[O]/[CO_2]$ remain unity, alongside the influences from temperature.在火星的当地晚上观察到了太阳能风电通量和速度对中性热层/外层组成的每日变化的直接影响的多飞机运测量值并呈现。它标志着有史以来第一个直接\ emph {intu}观察火星外层组成上能量太阳颗粒辐射之间相互作用的观察，有可能导致exosphere中原子$ [o] $不同的稳定逃逸人群。
Mars Exospheric Neutral Composition Analyzer (MENCA) of Mars Orbiter Mission (MOM) measures the \emph{in-situ} neutral upper atmospheric constituents of Mars. Martian lower atmosphere predominated by the presence of $CO_2$ which photo-dissociates into atomic oxygen ($O$) in higher altitudes much near the exobase. Atomic $O$ plays a significant role in invoking the stronger presence of $O_2^+$ in the Martian ionosphere. Primary photo-dissociative species $CO_{2}$, crossover their neutral abundance with atomic $O$ in the collisionless heterogenous atmosphere with varying local solar conditions. Initial measurements from Neutral Gas and Ion Mass Spectrometer (NGIMS) instrument on Mars Atmosphere and Volatile Evolution (MAVEN) estimated these crossover/transition altitudes wavering between $\approx$225 km to 240 km during solar maximum conditions with peak solar illuminations. MENCA sampled the neutral atmospheric species, below the exobase up to the periareion of $\approx$160 km, under low solar activity conditions during June 2018. Observations of partial pressures of $CO_2$ and $O$ in subsequent orbits reveals that solar inputs are crucial in quantifying these crossing points, where $[O]/[CO_2]$ remain unity, alongside the influences from temperature. The multi-spacecraft measurements of the direct influences of solar wind charged particle fluxes and velocity on the daily variation of neutral thermospheric/exospheric compositions were observed on the local evening hours of Mars and presented. It marks the first-ever direct \emph{in-situ} observation of interaction between the energetic solar particle radiations on Martian exospheric compositions, potentially contributing to the steady escape and differing population of atomic $[O]$ in the exosphere.
