ARES + MOOG: A Practical Overview of an Equivalent Width (EW) Method to Derive Stellar Parameters
ARES + MOOG: A Practical Overview of an Equivalent Width (EW) Method to Derive Stellar Parameters
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DOI：
10.1007/978-3-319-06956-2_26
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发表时间：
2014-07
期刊：
影响因子：
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通讯作者：
S. Sousa
中科院分区：
文献类型：
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作者：
S. Sousa
本章描述了使用等效宽度(EW)方法确定光谱恒星参数的重要实用方面。给出了任何电子战方法所需的基本步骤的一般描述，以及在文献中使用的不同方法中可能发现的差异。文中以ARES+MOG为例，详细描述了该方法的每一步。重点介绍了该方法的具体步骤，即使用微分分析来确定所采用的线表的原子数据，自动确定电子战，以及在程序结束时寻找最佳参数的方法。最后，给出了一个实用的教程，其中我们侧重于简单的练习，有助于说明和解释丰度与假设的恒星参数的依赖关系。文中描述了它们之间的相互依赖关系，并给出了寻找“最终”恒星参数的明确步骤。
This chapter describes the important practical aspects in the use of an equivalent width (EW) method for the determination of spectroscopic stellar parameters. A general description of the fundamental steps required by any EW method is given, together with possible differences that may be found in different methods used in the literature. ThenARES+MOOGis used as an example where each step of the method is described in detail. A special focus is given for the specific steps of this method, namely the use of a differential analysis to define the atomic data for the adopted line list, the automatic EW determinations, and the way to find the best parameters at the end of the procedure. Finally, a practical tutorial is given, where we focus on simple exercises useful to illustrate and explain the dependence of the abundances with the assumed stellar parameters. The interdependences are described and a clear procedure is given to find the “final” stellar parameters.