标题： 超新星喷发物中碳质尘形成过程中化学与成核之间的相互作用 显示英文标题

标题： The interplay between chemistry and nucleation in the formation of carbonaceous dust in supernova ejecta

摘要： 核心坍缩超新星被认为是高红移宇宙星际介质原始尘埃富集的重要贡献者。 迄今为止，关于恒星爆炸中尘埃形成的理论模型提供了相互矛盾的结果，并且对本地超新星中尘埃形成观测的拟合效果普遍较差。 我们提出了一种用于计算年轻超新星遗迹中碳质尘埃形成的新方法。 我们的新技术结合了成核理论和化学反应网络，使我们能够计算尘埃在分子水平以上的生长，同时考虑形成颗粒的化学侵蚀。 我们发现碳质尘埃在喷发物质的核心中高效形成，但需要数年时间才能凝结，比之前估计的时间更长。 它形成得不均匀，并且集中在遗迹的内层部分。 这些结果支持核心坍缩超新星作为尘埃工厂的作用，并为SN 1987A的观测提供了新的见解，在该超新星中已检测到大量尘埃在核心坍缩后数年内形成。 显示英文摘要

摘要： Core-collapse supernovae are considered to be important contributors to the primitive dust enrichment of the interstellar medium in the high-redshift universe. Theoretical models of dust formation in stellar explosions have so far provided controversial results and a generally poor fit to the observations of dust formation in local supernovae. We present a new methodology for the calculation of carbonaceous dust formation in young supernova remnants. Our new technique uses both the nucleation theory and a chemical reaction network to allow us to compute the dust growth beyond the molecular level as well as to consider chemical erosion of the forming grains. We find that carbonaceous dust forms efficiently in the core of the ejecta, but takes several years to condensate, longer than previously estimated. It forms unevenly and remains concentrated in the inner part of the remnant. These results support the role of core-collapse supernovae as dust factories and provide new insight on the observations of SN 1987A, in which large amounts of dust have been detected to form on a timescale of years after core collapse.