TOF‐SIMS analysis of crater residues from Wild 2 cometary particles on Stardust aluminum foil
TOF‐SIMS analysis of crater residues from Wild 2 cometary particles on Stardust aluminum foil
复制标题
对 Stardust 铝箔上 Wild 2 彗星颗粒的陨石坑残留物进行 TOF-SIMS 分析
DOI：
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发表时间：
2008
期刊：
影响因子：
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通讯作者：
S. Sandford
中科院分区：
文献类型：
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作者：
J. Leitner;T. Stephan;A. Kearsley;F. Hörz;G. Flynn;S. Sandford
摘要：用TOF-西姆斯研究了星尘使命中铝箔上彗星颗粒的撞击残留物的元素和有机组成。从彗星81 P/野生2的残留物质显示了广泛的组成范围，从近单矿物颗粒的polymict聚集。尽管分析的样品体积非常小，但所研究残留物的平均元素组成与散装Cl-活度值相似。由于撞击过程中化合物的碎裂和变化以及铝箔上存在污染物，对撞击残留物中有机成分的分析很复杂。然而，观测到的多环芳烃（PAHs）无疑与撞击残留物有关，因此最有可能来自彗星。
Abstract— Impact residues of cometary particles on aluminum foils from the Stardust mission were investigated with TOF‐SIMS for their elemental and organic composition. The residual matter from comet 81P/Wild 2 shows a wide compositional range, from nearly monomineralic grains to polymict aggregates. Despite the comparably small analyzed sample volume, the average element composition of the investigated residues is similar to bulk CI chondritic values. Analysis of organic components in impact residues is complicated, due to fragmentation and alteration of the compounds during the impact process and by the presence of contaminants on the aluminum foils. Nevertheless, polycyclic aromatic hydrocarbons (PAHs) that are unambiguously associated with the impact residues were observed, and thus are most likely of cometary origin.