冷星模型大气中新的扩展原子数据--在MAFAGS-OS模型中使用Kurucz的新铁数据
New extended atomic data in cool star model atmospheres - Using Kurucz's new iron data in MAFAGS-OS models
摘要：
上下文冷恒星模型大气是研究恒星质量、年龄和元素丰度组成的常用工具。理论大气模型在很大程度上依赖于计算时使用的原子数据。目标。我们提出了流量和温度分层的变化时，从铁的数据计算的R. L。从90年代中期的Kurucz到2009年的Kurucz铁计算。方法. MAFAGS-OS不透明度采样大气使用Ryabchikova在VALD数据库中实现的Kurucz 2009铁原子数据重新计算。温度分层和紧急通量分布的新版本，称为MAFAGS-OS 9，相比前一个版本和太阳通量测量。结果使用转换成VALD格式的Kurucz线表和Mg i和Al i的新的束缚-自由不透明度，导致太阳温度分层的变化不超过28 K。与此同时，计算出的太阳通量分布表明观测和理论太阳模型之间的一致性明显更好。这些变化在相应的模型的温度分层是小的，但仍然影响恒星参数的测定和丰度分析的幅度。
英文摘要：
Context. Cool star model atmospheres are a common tool for the investigation of stellar masses, ages and elemental abundance composition. Theoretical atmospheric models strongly depend on the atomic data used when calculating them. Aims. We present the changes in flux and temperature stratification when changing from iron data computed by R.L. Kurucz in the mid 90s to the Kurucz 2009 iron computations. Methods. MAFAGS-OS opacity sampling atmospheres were recomputed with Kurucz 2009 iron atomic data as implemented in the VALD database by Ryabchikova. Temperature stratification and emergent flux distribution of the new version, called MAFAGS-OS9, is compared to the former version and to solar flux measurements. Results. Using the Kurucz line lists converted into the VALD format and new bound-free opacities for Mg i and Al i leads to changes in the solar temperature stratification by not more than 28 K. At the same time, the calculated solar flux distribution shows significantly better agreement between observations and theoretical solar models. These changes in the temperature stratification of the corresponding models are small, but nevertheless of a magnitude that affects stellar parameter determinations and abundance analysis.
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