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Sources of cosmic dust in the Earth's atmosphere

机译:地球大气中的宇宙尘埃来源

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There are four known sources of dust in the inner solar system: Jupiter Family comets, asteroids, Halley Type comets, and Oort Cloud comets. Here we combine the mass, velocity, and radiant distributions of these cosmic dust populations from an astronomical model with a chemical ablation model to estimate the injection rates of Na and Fe into the Earth's upper atmosphere, as well as the flux of cosmic spherules to the surface. Comparing these parameters to lidar observations of the vertical Na and Fe fluxes above 87.5km, and the measured cosmic spherule accretion rate at South Pole, shows that Jupiter Family Comets contribute (8017)% of the total input mass (4314td(-1)), in good accord with Cosmic Background Explorer and Planck observations of the zodiacal cloud.
机译:内部太阳系中有四种已知的尘埃来源:木星家族彗星,小行星,哈雷型彗星和奥尔特云彗星。在这里,我们将天文模型与化学烧蚀模型相结合的这些宇宙尘埃种群的质量,速度和辐射分布,以估算Na和Fe注入地球高层大气的速率,以及宇宙小球向地球的通量。表面。将这些参数与激光雷达对87.5 km以上的垂直Na和Fe通量的激光雷达观测结果以及南极测得的宇宙球小球积聚率进行比较后发现,木星家族彗星占总输入质量的(8017)%(4314td(-1)) ,与黄道云的Cosmic Background Explorer和Planck观测非常吻合。

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