Progress on model atmospheres and line data
نویسندگان
چکیده
منابع مشابه
Stellar model atmospheres with magnetic line blanketing
Model atmospheres of A and B stars are computed taking into account magnetic line blanketing. These calculations are based on the new stellar model atmosphere code LLM which implements direct treatment of the opacities due to the bound-bound transitions and ensures an accurate and detailed description of the line absorption. The anomalous Zeeman effect was calculated for the field strength...
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Oxygen line formation in 3D hydrodynamical model atmospheres
The formation of [O i], O i and OH lines in metal-poor stars has been studied by means of 3D hydrodynamical model atmospheres. For O i detailed 3D non-LTE calculations have been performed. While the influence of 3D model atmospheres is minor for [O i] and O i lines, the very low temperatures encountered at low metallicities have a drastic impact on OH. As a result, the derived O abundances are ...
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In this review presented at the Symposium A stellar journey in Uppsala, June 2008, I give my account of the historical development of the MARCS code from the first version published in 1975 and its premises to the 2008 grid. It is shown that the primary driver for the development team is the science that can be done with the models, and that they constantly strive to include the best possible p...
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Data envelopment analysis (DEA) is a method for recognizing the efficient frontier of decision making units (DMUs).This paper presents a Context-dependent DEA which uses the interval inputs and outputs. Context-dependent approach with interval inputs and outputs can consider a set of DMUs against the special context. Each context shows an efficient frontier including DMUs in particular l...
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ژورنال
عنوان ژورنال: Symposium - International Astronomical Union
سال: 1997
ISSN: 0074-1809
DOI: 10.1017/s0074180900116717