论文标题
基于DFMS/COPS数据的67p/Churyumov-Gerasimenko彗星的气体产生14种。
The gas production of 14 species from comet 67P/Churyumov-Gerasimenko based on DFMS/COPS data from 2014-2016
论文作者
论文摘要
罗塞塔航天器探测了67p/churyumov-gerasimenko彗星的昏迷，并显示了多种不同的分子。 Rosina Comet压力传感器和双聚焦质谱仪为许多挥发性化合物提供原位密度，包括14种气体H2O，CO2，CO，CO，H2S，O2，C2H6，CH3OH，CH3OH，H2CO，H2CO，CH4，CH4，NH3，NH3，HCN，HCN，C2H5OH，OCS，OCS，OCS和CS2。我们适合2014年8月至2016年9月在整个彗星任务中观察到的密度与昏迷型的逆向模型。我们以3996个三角形元件为单位，在彗星形状上检索表面排放，用于50个分离的时间间隔。对于每种气体，我们得出系统的误差界限，并报告生产，峰值产量和时间整合总生产的时间演变。我们讨论了核的两个叶以及北半球和南半球的生产。此外，我们提供了天然气产量与季节性照明的比较。
The coma of comet 67P/Churyumov-Gerasimenko has been probed by the Rosetta spacecraft and shows a variety of different molecules. The ROSINA COmet Pressure Sensor and the Double Focusing Mass Spectrometer provide in-situ densities for many volatile compounds including the 14 gas species H2O, CO2, CO, H2S, O2, C2H6, CH3OH, H2CO, CH4, NH3, HCN, C2H5OH, OCS, and CS2. We fit the observed densities during the entire comet mission between August 2014 and September 2016 to an inverse coma model. We retrieve surface emissions on a cometary shape with 3996 triangular elements for 50 separated time intervals. For each gas we derive systematic error bounds and report the temporal evolution of the production, peak production, and the time-integrated total production. We discuss the production for the two lobes of the nucleus and for the northern and southern hemispheres. Moreover we provide a comparison of the gas production with the seasonal illumination.
