论文标题
土星上层大气和Cassini INM的环的组成测量
Compositional Measurements of Saturn's Upper Atmosphere and Rings from Cassini INMS
论文作者
论文摘要
卡西尼航天器的最后一条轨道直接采样了土星的热层，并揭示了比以前认为的更复杂的化学复杂环境。卡西尼（Cassini）上的离子和中性质谱仪（INM）的观察结果提供了该区域的组成测量，并发现从环中涌入土星上层大气中的材料涌入。我们在这里对Ch $ _4 $，H $ _2 $ O和NH $ _3 $信号进行了深入分析，并提供了进一步的证据，证明了外部材料从环中进入土星的气氛。我们使用一种新的质谱反卷积算法来确定光谱中观察到的每个物种的量，并使用这些值来确定这些物种的涌入和质量沉积速率。
The Cassini spacecraft's last orbits directly sampled Saturn's thermosphere and revealed a much more chemically complex environment than previously believed. Observations from the Ion and Neutral Mass Spectrometer (INMS) aboard Cassini provided compositional measurements of this region and found an influx of material raining into Saturn's upper atmosphere from the rings. We present here an in-depth analysis of the CH$_4$, H$_2$O, and NH$_3$ signal from INMS and provide further evidence of external material entering Saturn's atmosphere from the rings. We use a new mass spectral deconvolution algorithm to determine the amount of each species observed in the spectrum and use these values to determine the influx and mass deposition rate for these species.
