Jones A P
Institut d'Astrophysique Spatiale, CNRS , Univ. Paris-Sud, Université Paris-Saclay , Bât. 121, 91405 Orsay cedex, France.
R Soc Open Sci. 2016 Dec 14;3(12):160223. doi: 10.1098/rsos.160223. eCollection 2016 Dec.
The origin of the diffuse interstellar bands (DIBs), one of the longest-standing mysteries of the interstellar medium (ISM), is explored within the framework of (THEMIS). The likely nature of the DIB carriers and their evolution is here explored within the framework of the structures and sub-structures inherent to doped hydrogenated amorphous carbon grains in the ISM. Based on the natural aromatic-rich moieties (asphaltenes) recovered from coal and oil, the likely structure of their interstellar analogues is investigated within the context of the diffuse band problem. It is here proposed that the top-down evolution of interstellar carbonaceous grains, and, in particular, a-C(:H) nanoparticles, is at the heart of the formation and evolution of the DIB carriers and their associations with small molecules and radicals, such as C, C, CH and CN. It is most probable that the DIBs are carried by dehydrogenated, ionized, hetero-cyclic, olefinic and aromatic-rich moieties that form an integral part of the contiguous structure of hetero-atom-doped hydrogenated amorphous carbon nanoparticles and their daughter fragmentation products. Within this framework, it is proposed that polyene structures in all their variants could be viable DIB carrier candidates.
弥漫星际带（DIBs）是星际介质（ISM）中存在时间最长的谜团之一，本文在THEMIS框架内对其起源进行了探索。本文在ISM中掺杂氢化非晶碳颗粒所固有的结构和子结构框架内，探讨了DIB载体的可能性质及其演化。基于从煤和石油中提取的富含天然芳烃的部分（沥青质），在弥漫带问题的背景下研究了它们星际类似物的可能结构。本文提出，星际碳质颗粒，特别是a-C(:H)纳米颗粒的自上而下演化，是DIB载体形成和演化以及它们与小分子和自由基（如C、C、CH和CN）缔合的核心。最有可能的是，DIBs由脱氢、离子化、杂环、烯烃和富含芳烃的部分所承载，这些部分构成了杂原子掺杂氢化非晶碳纳米颗粒及其子碎片产物连续结构的一个组成部分。在此框架内，本文提出所有变体的多烯结构都可能是可行的DIB载体候选物。
