The Volatile Composition of the Split Ecliptic comet 73P/Schwassmann-Wachmann 3: A Comparison of Fragments C and B
The Volatile Composition of the Split Ecliptic comet 73P/Schwassmann-Wachmann 3: A Comparison of Fragments C and B
复制标题
分裂黄道彗星 73P/Schwassmann-Wachmann 3 的挥发性成分：碎片 C 和 B 的比较
DOI：
10.1086/508806
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发表时间：
2006
期刊：
影响因子：
--
通讯作者：
G. Blake
中科院分区：
文献类型：
--
作者：
G. Villanueva;B. Bonev;M. Mumma;K. Magee;M. DiSanti;C. Salyk;G. Blake
2006年4月初，利用高色散梯队光谱研究了木星家族彗星73P/Schwassmann-Wachmann 3 （SW3）的碎片C和B的组成。这两个碎片在乙烷中都被耗尽了，而C在大多数形式的挥发性碳中都被耗尽了。特别是，片段C显示CH3OH的严重消耗，但HCN的“正常”丰度（具有类似的挥发性）。热处理是一种可能的解释，但由于碎片B可能是由于频繁的爆发和破碎而升华较新鲜的物质，因此观察到的消耗可能具有宇宙起源的意义。与奥尔特云彗星C/1999 S4 （LINEAR）一样，SW3中挥发性冰的化学性质可能与彗星前颗粒的冰幔升华以及随后的气相化学和再冷凝有关。
The composition of fragments C and B of the Jupiter-family comet 73P/Schwassmann-Wachmann 3 (SW3) was investigated in early April of 2006 at IR wavelengths using high-dispersion echelle spectroscopy. Both fragments were depleted in ethane, and C was depleted in most forms of volatile carbon. In particular, fragment C shows a severe depletion of CH3OH but a "normal" abundance of HCN (which has a similar volatility). Thermal processing is a possible explanation, but since fragment B is perhaps sublimating fresher material because of the frequent outbursts and fragmentation, the observed depletions might have cosmogonic implications. The chemistry of the volatile ices in SW3, like in the Oort Cloud comet C/1999 S4 (LINEAR), may be associated with sublimation of icy mantles from precometary grains followed by subsequent gas-phase chemistry and recondensation.