未成组的碳质彗星与2 P/Encke等短周期彗星的反射率比较
Comparing the reflectivity of ungrouped carbonaceous chondrites with that of short period comets like 2P/Encke
摘要：
目标。由这些彗星分裂产生的小行星复合体的存在表明，演化的彗星也可以产生能够作为陨石生存的高强度材料。我们选择了彗星2 P/Encke作为例子，它是所谓的金牛座复合体中最大的物体之一。我们比较了这颗彗星的反射光谱与一些南极未分组的碳质陨石的实验室光谱，以研究这些陨石中的一些是否可能与演化的彗星。方法.我们比较了2 P/Encke的光谱行为与实验室碳质方解石的光谱。普通碳质球粒陨石群的不同标本与2 P/Encke彗星的整体特征和斜率并不匹配。在尝试异常碳质陨石时，我们发现了两块陨石，陨石山01017和格罗夫纳山95551，它们可能是形成这颗短周期彗星的黑暗物质的良好代表。我们假设这两块陨石可能是罕见的幸存样本，无论是来自金牛座复合体还是其他成分相似的天体。无论如何，在这些南极发现中很难摆脱陆地风化的影响，需要进一步的研究。未来从所谓的休眠彗星返回的样本也可能有助于建立形成演化的短周期彗星的材料的地面真相。结果作为一个自然的结果，我们认为，确定2 P/Encke形成材料的良好代理可能对未来的样本返回任务产生有趣的影响，这些任务是进化的，潜在的休眠或灭绝的彗星。了解演化彗星的组成性质，对于今后减轻这些黑暗和危险的抛射体的撞击危险特别重要。
英文摘要：
Aims. The existence of asteroid complexes produced by the disruption of these comets suggests that evolved comets could also produce high-strength materials able to survive as meteorites. We chose as an example comet 2P/Encke, one of the largest object of the so-called Taurid complex. We compare the reflectance spectrum of this comet with the laboratory spectra of some Antarctic ungrouped carbonaceous chondrites to investigate whether some of these meteorites could be associated with evolved comets. Methods. We compared the spectral behaviour of 2P/Encke with laboratory spectra of carbonaceous chondrites. Different specimens of the common carbonaceous chondrite groups do not match the overall features and slope of comet 2P/Encke. Trying anomalous carbonaceous chondrites, we found two meteorites, Meteorite Hills 01017 and Grosvenor Mountains 95551, which could be good proxies for the dark materials forming this short-period comet. We hypothesise that these two meteorites could be rare surviving samples, either from the Taurid complex or another compositionally similar body. In any case, it is difficult to get rid of the effects of terrestrial weathering in these Antarctic finds, and further studies are needed. Future sample return from the so-called dormant comets could be also useful to establish a ground truth on the materials forming evolved short-period comets. Results. As a natural outcome, we think that identifying good proxies of 2P/Encke-forming materials might have interesting implications for future sample-return missions to evolved, potentially dormant or extinct comets. To understand the compositional nature of evolved comets is particularly relevant in the context of the future mitigation of impact hazard from these dark and dangerous projectiles.
机构、总结、中文摘要均由AI分析而来，可能存在错误，请以论文正文为准。
