ATOMIC DATA AND SPECTRAL MODEL FOR Fe II
ATOMIC DATA AND SPECTRAL MODEL FOR Fe II
复制标题
Fe II 的原子数据和光谱模型
DOI：
10.1088/2041-8205/718/2/l189
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发表时间：
2010
期刊：
影响因子：
--
通讯作者：
T. Kallman
中科院分区：
文献类型：
--
作者：
M. Bautista;V. Fivet;C. Ballance;P. Quinet;G. Ferland;C. Mendoza;T. Kallman
我们对FeⅡ的辐射跃迁速率和电子碰撞强度进行了大量的计算。数据集包括来自3d7、3d64s和3d5 4 S 2？>构型的52个水平。A值的计算结合了最先进的多组态方法，即相对论Hartree-Fock、Thomas-Fermi-Dirac势和Dirac-Fock方法，而R-矩阵加中间耦合框架变换、Breit-Pauli R-矩阵和Dirac R-矩阵包被用于获得碰撞强度。我们研究了每种方法的优缺点，并从由此产生的数据差异中估计了利率的不确定性。我们继续构建激发平衡光谱模型，并将来自每个数据集的预测与来自不同天文对象的观测光谱进行比较。因此，我们能够在红外和光学区域以及UV Fe II吸收光谱中建立[Fe II]发射的光谱模拟基准。最后，我们提供了用于发射光谱的诊断线比率和线发射率以及用于吸收光谱的柱密度。所有原子数据和模型都可以在线获得，也可以通过原子数据管理环境获得。
We present extensive calculations of radiative transition rates and electron impact collision strengths for Fe ii. The data sets involve 52 levels from the 3d7, 3d64s, and 3 d 5 4 s 2 ?> configurations. Computations of A-values are carried out with a combination of state-of-the-art multiconfiguration approaches, namely the relativistic Hartree–Fock, Thomas–Fermi–Dirac potential, and Dirac–Fock methods, while the R-matrix plus intermediate coupling frame transformation, Breit–Pauli R-matrix, and Dirac R-matrix packages are used to obtain collision strengths. We examine the advantages and shortcomings of each of these methods, and estimate rate uncertainties from the resulting data dispersion. We proceed to construct excitation balance spectral models, and compare the predictions from each data set with observed spectra from various astronomical objects. We are thus able to establish benchmarks in the spectral modeling of [Fe ii] emission in the IR and optical regions as well as in the UV Fe ii absorption spectra. Finally, we provide diagnostic line ratios and line emissivities for emission spectroscopy as well as column densities for absorption spectroscopy. All atomic data and models are available online and through the AtomPy atomic data curation environment.
Fe II 禁线的辐射跃迁率
影响因子：
6.5
作者：
Deb N
通讯作者：
Deb N