论文标题
光光谱的光电离世星云中的物理条件和化学丰度
Physical conditions and chemical abundances in photoionized nebulae from optical spectra
论文作者
论文摘要
本章对光电离气体H II区域和行星星云中存在的物理条件和化学丰度的最新进展进行了综述。附着在大型望远镜上的高度敏感光谱仪的到来以及更复杂和详细的原子数据计算和电离校正因子的发展有助于增加过去几年中光电离世星云中研究的离子物种的数量，并减少计算丰度的不确定性。将特别注意检测非常微弱的线，例如在H II区域和行星星云中C，N和O的重元素重组线，以及行星星云中的中子捕获元件（Z> 30）的碰撞激发线。
This chapter presents a review on the latest advances in the computation of physical conditions and chemical abundances of elements present in photoionized gas H II regions and planetary nebulae). The arrival of highly sensitive spectrographs attached to large telescopes and the development of more sophisticated and detailed atomic data calculations and ionization correction factors have helped to raise the number of ionic species studied in photoionized nebulae in the last years, as well as to reduce the uncertainties in the computed abundances. Special attention will be given to the detection of very faint lines such as heavy-element recombination lines of C, N and O in H II regions and planetary nebulae, and collisionally excited lines of neutron-capture elements (Z >30) in planetary nebulae.
