From Stars to Active Galactic Nuclei. Phototionization, Photoexcitation, Opacities, and Spectra of Low Ionization Fe-peak Species.

中性和单电离类铁物质（Sc、Ti、V、Cr、Mn、Fe、Co和Ni）的不透明度和光谱的可靠定量建模对于21世纪的天体物理学至关重要，因为许多基础研究领域都依赖于这些模型。PI将扩展他最近在亚稳态水平上的工作，以处理发生在各种天文来源中的光激发和光吸收过程。他将集中研究两个相关问题：(1)AGN发射光谱中Fe II和其他单电离物质的光激发；(2)晚型恒星大气中中性和单电离物质的光吸收和非lte不透明度。PI和他的合作者将通过大量的数据库和代码，以及一个新的数据服务器和光谱分析工具，使所有的原子数据和模型广泛可用。他们还将为美国和国外的研究生开设一门天体物理学的原子物理学混合课程。该课程将以讲座视频、模拟和书面材料的形式在网上免费提供。

Reliable quantitative modeling of opacities and spectra of neutral and singly ionized Fe-like species (Sc, Ti, V, Cr, Mn, Fe, Co, and Ni) is of paramount importance for 21st century astrophysics owing to various fundamental research areas that depend on these models. The PI will extend his recent work on metastable levels to treat photoexcitation and photoabsorption processes that occur in a variety of astronomical sources. He will concentrate on two related problems: (1) photoexcitation of Fe II and other singly ionized species in emission spectra of AGN, and (2) photoabsorption and non-LTE opacities of neutral and singly ionized species in atmospheres of late-type stars.The PI and his collaborators will make all atomic data and models widely available through numerous databases and codes, and through a new data server and spectral analysis tool. They will also create a hybrid course on Atomic Physics for Astrophysics to offer to graduate students across the US and abroad. The course will be made freely available online in the form of videos of lectures, simulations, and written materials.