论文标题
基于2020年恒星掩星的光曲线结果研究冥王星大气的研究
Study of Pluto's Atmosphere Based on 2020 Stellar Occultation Light Curve Results
论文作者
论文摘要
2020年6月6日，在地面天文台成功观察到了冥王星的恒星掩星，并研究了冥王星的大气参数。我们使用了冥王星的大气模型（DO15），假设球形且透明的纯N2大气。使用射线追踪代码，恒星掩盖光曲线非常适合该模型。我们发现，冥王星在1215 km的参考半径上的大气压为6.72+_0.21μbar。我们的估计压力表明，与季节性挥发性传输模型一致的2016年所研究压力的延续。我们得出的结论是，由于该盆地中的N2冰的加热，晶旋将冰川中的N2冷凝过程正在增加。这项研究的结果显示在大气压年度演变的图表上。
On 6 Jun 2020, Pluto's stellar occultation was successfully observed at a ground-based observatory and Pluto's atmospheric parameters were investigated. We used an atmospheric model of Pluto (DO15), assuming a spherical and transparent pure N2 atmosphere. Using ray-tracing code the stellar occultation light curve was satisfactorily fitted to this model. We found that Pluto's atmospheric pressure at the reference radius of 1215 km is 6.72+_0.21 μbar. Our estimated pressure shows a continuation of the increasing pressure studied in 2016 consistent with a seasonal volatile transport model. We concluded that the N2 condensation processes in the Sputnik Planitia glacier are increasing due to the heating of the N2 ice in this basin. This study's result was shown on the diagram of the annual evolution of atmospheric pressure.
