论文标题
首先在彗星中对CN自由基的原位检测和分布式源的证据
First in-situ detection of the CN radical in comets and evidence for a distributed source
论文作者
论文摘要
尽管关于彗星中氰基（CN）激进分子的起源的辩论已经进行了数十年，但迄今为止尚未产生确切的答案。以前只能对CN进行远程研究，这严重阻碍了由于空间信息非常有限而限制其起源的努力。多亏了欧洲航天局的Rosetta航天器，该航天器将67p/Churyumov-Gerasimenko旋转了两年，我们可以首次调查CN在高空间和时间分辨率的彗星周围。在Rosinda仪器套件的一部分的高分辨率双关注质谱仪DFM的高分辨率双关注质谱仪DFMS上，在整个两年阶段的内部昏迷中分析了中性挥发物（包括HCN和CN根部），在整个两年的彗星中分析了中性挥发物（包括HCN和CN根部）。从对全效率数据的彻底分析中，得出了彗星昏迷中的CN自由基的丰度。来自2015年2月的近距离Flyby事件的数据表明，CON激进分子的分布式起源于67p/Churyumov-Gerasimenko。
Although the debate regarding the origin of the cyano (CN) radical in comets has been ongoing for many decades, it has yielded no definitive answer to date. CN could previously only be studied remotely, strongly hampering efforts to constrain its origin because of very limited spatial information. Thanks to the European Space Agency's Rosetta spacecraft, which orbited comet 67P/Churyumov-Gerasimenko for two years, we can investigate, for the first time, CN around a comet at high spatial and temporal resolution. On board Rosetta's orbiter module, the high-resolution double-focusing mass spectrometer DFMS, part of the ROSINA instrument suite, analyzed the neutral volatiles (including HCN and the CN radical) in the inner coma of the comet throughout that whole two-year phase and at variable cometocentric distances. From a thorough analysis of the full-mission data, the abundance of CN radicals in the cometary coma has been derived. Data from a close flyby event in February 2015 indicate a distributed origin for the CN radical in comet 67P/Churyumov-Gerasimenko.
