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FULLERENES AND BUCKYONIONS IN THE INTERSTELLAR MEDIUM

机译:星际介质中的富勒烯和鼠李

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摘要

We show that photoabsorption by fullerenes and buckyonions (multishell fullerenes) explain the shape, width, and peak energy of the most prominent feature of interstellar absorption, the UV bump at 2175 A. The predicted optical and near-infrared transitions for these molecules also offer a potential explanation for the long-standing problem of the identity of the diffuse interstellar bands. The implied ubiquitous distribution of fullerenes may also account for the anomalous galactic microwave emission detected by cosmic microwave background experiments. Comparing theoretical cross sections and astronomical data, we estimate a density of fullerenes in the diffuse interstellar medium of 0.1-0.2 parts per million, consistent with the findings in meteorites. Fullerene-based molecules appear to be a major carbon reservoir in the interstellar medium.
机译:我们表明,富勒烯和巴金酮(多壳富勒烯)的光吸收可以解释星际吸收最突出特征的形状,宽度和峰值能量,即2175 A的紫外线凸点。这些分子的预测光学和近红外跃迁也提供了这可能是星际漫射带身份长期存在问题的一种解释。富勒烯的普遍分布也可能解释了宇宙微波背景实验检测到的异常银河微波发射。比较理论截面和天文数据,我们估计弥散星际介质中富勒烯的密度为百万分之0.1-0.2,这与陨石的发现相符。基于富勒烯的分子似乎是星际介质中的主要碳储库。

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