| タイトル | Uncertainties in Atomic Data and Their Propagation Through Spectral Models. I. |
| 本文（外部サイト） | http://hdl.handle.net/2060/20140017627 |
| 著者（英） | Quinet, P.; Bautista, M. A.; Dunn, J.; Gull, T. R.; Mendoza, C.; Fivet, V.; Kallman, T. R. |
| 著者所属（英） | NASA Goddard Space Flight Center |
| 発行日 | 2013-05-20 |
| 言語 | eng |
| 内容記述 | We present a method for computing uncertainties in spectral models, i.e., level populations, line emissivities, and emission line ratios, based upon the propagation of uncertainties originating from atomic data.We provide analytic expressions, in the form of linear sets of algebraic equations, for the coupled uncertainties among all levels. These equations can be solved efficiently for any set of physical conditions and uncertainties in the atomic data. We illustrate our method applied to spectral models of Oiii and Fe ii and discuss the impact of the uncertainties on atomic systems under different physical conditions. As to intrinsic uncertainties in theoretical atomic data, we propose that these uncertainties can be estimated from the dispersion in the results from various independent calculations. This technique provides excellent results for the uncertainties in A-values of forbidden transitions in [Fe ii]. Key words: atomic data - atomic processes - line: formation - methods: data analysis - molecular data - molecular processes - techniques: spectroscopic |
| NASA分類 | Astrophysics |
| レポートNO | GSFC-E-DAA-TN16688 |
| 権利 | Copyright, Distribution as joint owner in the copyright |
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