分子云的天体化学观测和模拟研究

Observational and Simulation Studies of Molecular Cloud Chemistry

分子云是恒星形成的主要场所.伴随着望远镜探测能力的提升,时至今日已经有约200多种分子在星际云团和星周环境中被探测到,为人们理解分子云内物理化学过程提供了观测窗口.天体化学就是通过理论、实验和模拟等手段,从物理化学角度理解分子云内分子演化的化学过程,揭示分子在星际空间的演化途径.本文首先简要介绍了两种分子频谱数据的分析方法|转动图和能级布局图方法,然后总结了天体化学模拟方面的最新研究进展.

Molecular clouds are the main birth places of stars. More than 200 molecules havebeen detected in the interstellar clouds and circumstellar environments with more powerful telescopes, which serves as a window to understand the physical and chemical processes in molecular clouds. Astro-chemistry is revealing the mystery of history of interstellar molecules through theories, experiments, and modelings. In my PhD thesis I first briefly introduced two methods, that are often used for analyzing the observed spectral line data of complexorganic molecules, i.e. the rotation diagram method and the population diagram analysis,and then I reviewed the recent progress in astro-chemical modeling. I also summarized the scientific results by analyzing the observed abundances of complex organic molecules in massive star-formation regions, and improved the microcosmic physical contents in the astro-chemical gas-grain models. An outlook of future works is given in the end. The main work I have done for this thesis includes the following aspects.