论文标题
冥王星大气中雾兹的双峰分布
A bimodal distribution of haze in Pluto's atmosphere
论文作者
论文摘要
冥王星，泰坦和特里顿构成了独特的太阳系体，具有冰冷的表面和富含有机光化学和雾霾形成的化学降低气氛。 Hazes在这些大气中起着重要作用，物理和化学过程高度依赖于粒径，但是当前，人们对减少气氛的雾化大小分布却很少了解。在这里，我们报告了冥王星的雾糊状颗粒是双峰分布的观察证据，该颗粒成功地重现了来自New Horizons的全相散射观测值。结合以前对泰坦薄荷的模拟，该结果表明，在压力水平接近压力水平〜0.5pa的快速变化中，雾兹颗粒偏向于0.5pa的快速变化，并有利于形成泰坦分离的雾霾的光化学而不是动态起源。它还表明，氧化和减少气氛都可以产生多模式危险，并鼓励重新分析泰坦和特里顿对Hazes的观察。
Pluto, Titan, and Triton make up a unique class of solar system bodies, with icy surfaces and chemically reducing atmospheres rich in organic photochemistry and haze formation. Hazes play important roles in these atmospheres, with physical and chemical processes highly dependent on particle sizes, but the haze size distribution in reducing atmospheres is currently poorly understood. Here we report observational evidence that Pluto's haze particles are bimodally distributed, which successfully reproduces the full phase scattering observations from New Horizons. Combined with previous simulations of Titan's haze, this result suggests that haze particles in reducing atmospheres undergo rapid shape change near pressure levels ~0.5Pa and favors a photochemical rather than a dynamical origin for the formation of Titan's detached haze. It also demonstrates that both oxidizing and reducing atmospheres can produce multi-modal hazes, and encourages reanalysis of observations of hazes on Titan and Triton.
