论文标题
使用分子线来确定酷星大气中的碳和氮丰度
Using Molecular Lines to Determine Carbon and Nitrogen Abundances in the Atmospheres of Cool Stars
论文作者
论文摘要
同时分析5100-5200和7930-8100A光谱区域中C_2和CN分子条带是准确测定碳（C）和氮（N）丰度在太阳能恒星大气中的精确测定的有希望的替代方法。在两个分子的分子常数最近改进后，这种新方法的实际实现变得可能成为可能。新的分子数据预测了正确的线强度和线位置；因此，它们被包括在维也纳原子线数据库（Vald）中，该数据库被天文学家和光谱学家广泛使用。在本文中，我们证明了分子数据分析提供了c，特别是与原子线衍生的n相一致的n丰度。我们通过执行三颗星的分析来说明这一点。我们的结果为使用C_2和CN分子线的组合提供了有力的论点，以确定准确的氮丰度确定，牢记在于太阳能恒星的观察到的光谱中使用N1线的困难。
Simultaneous analysis of the C_2 and CN molecular bands in the 5100-5200 and 7930-8100A spectral regions is a promising alternative for the accurate determination of the carbon (C) and nitrogen (N) abundance in the atmospheres of the solar-like stars. Practical implementation of this new method became possible after recent improvements of the molecular constants for both molecules. The new molecular data predicted the correct line strength and line positions; therefore, they were included in the Vienna Atomic Line Database (VALD), which is widely used by astronomers and spectroscopists. In this paper, we demonstrate that the molecular data analysis provides C and, in particular, N abundances consistent with those derived from the atomic lines. We illustrate this by performing the analysis for three stars. Our results provide strong arguments for using the combination of C_2 and CN molecular lines for accurate nitrogen abundance determination keeping in mind the difficulties of using the N1 lines in the observed spectra of the solar-like stars.
