暗分子云模型中芳香族化学对气相动力学的敏感性分析
星系天体物理
2024-10-22 v1
摘要
越来越多的复杂有机分子在星际介质中被检测到, necessitating robust kinetic models that can be relied upon for investigating the involved chemical processes. Such models require rate constants for each of the thousands of reactions; the values of these are often estimated or extrapolated, leading to large uncertainties that are rarely quantified. 我们对3相暗云模型中的气相速率系数进行了全局蒙特卡罗和更局部的一因变量敏感性分析。计算了基于四个指标的时间依赖敏感性,以确定整体网络以及针对关键星际物种(硝基萘,cyanonaphthalene)的关键反应。所有四个指标发现,涉及引发烃类生长的小而反应性强的物种的反应对整体网络影响最大。硝基萘对这些反应以及苯基阳离子 (C6H5+) 的环形成和从苯到萘的芳香族生长都敏感。未来的工作应优先约束关键反应的速率系数并扩大这些过程周围的网络。这些结果凸显了敏感性分析技术识别复杂化学网络中关键过程(如天体化学建模中常用的方法)的价值。
引用
@article{arxiv.2410.09212,
title = {Sensitivity Analysis of Aromatic Chemistry to Gas-Phase Kinetics in a Dark Molecular Cloud Model},
author = {Alex N. Byrne and Ci Xue and Troy Van Voorhis and Brett A. McGuire},
journal= {arXiv preprint arXiv:2410.09212},
year = {2024}
}
备注
21 pages and 13 figures, accepted for publication in Physical Chemistry Chemical Physics