论文标题
彗星67p/churyumov-gerasimenko中的含物分子
CHO-bearing molecules in Comet 67P/Churyumov-Gerasimenko
论文作者
论文摘要
2004年，Rosetta航天器被派往67p/Churyumov-Gerasimenko彗星进行了对彗星的首次长期调查。该航天器于2014年到来后，立即靠近彗星，花了两年多的时间。在这两年中，罗西娜（Rosina）双聚焦质谱仪（DFM）在板上Rosetta发现了一个昏迷，具有意外的复杂化学成分，其中包括许多氧化分子。确定确切的彗星组成是了解最终在彗星冰中保守的恒星形成区域和原行星磁盘中有机富化学的重要第一步。在这项研究中，使用实验室校准和空间数据分析的联合方法来对67p/churyumov-Gerasimenko昏迷中的CHO-Compound进行详细的识别和量化。目的是在质量中得出最高100 U的水的Cho杂种丰度。在这项研究中，2015年5月斜角后期代表了67p/churyumov-Gerasimenko彗星的最佳体积。发现了各种各样的Cho Compound，并得出了它们的大量丰度。最后，将这些结果与其他彗星中的含斑分子的丰富性进行了比较，这些结果主要是从地面观测和建模中获得的。
In 2004, the Rosetta spacecraft was sent to comet 67P/Churyumov-Gerasimenko for the first ever long-term investigation of a comet. After its arrival in 2014, the spacecraft spent more than two years in immediate proximity to the comet. During these two years, the ROSINA Double Focusing Mass Spectrometer (DFMS) onboard Rosetta discovered a coma with an unexpectedly complex chemical composition that included many oxygenated molecules. Determining the exact cometary composition is an essential first step to understanding of the organic rich chemistry in star forming regions and protoplanetary disks that are ultimately conserved in cometary ices. In this study a joint approach of laboratory calibration and space data analysis was used to perform a detailed identification and quantification of CHO-compounds in the coma of 67P/Churyumov-Gerasimenko. The goal was to derive the CHO-compound abundances relative to water for masses up to 100 u. For this study, the May 2015 post-equinox period represent the best bulk abundances of comet 67P/Churyumov-Gerasimenko. A wide variety of CHO-compounds were discovered and their bulk abundances were derived. Finally, these results are compared to abundances of CHO-bearing molecules in other comets, obtained mostly from ground-based observations and modelling.
