论文标题
在Lamost调查中搜索R-Process增强的星星I：该方法
Searching for r-process-enhanced stars in the LAMOST Survey I: The Method
论文作者
论文摘要
$ r $ - 过程增强恒星的丰度模式包含限制$ r $ $ - 过程核合成的天体物理位点所需的关键信息，并加深我们对银河系化学演化的理解。为了扩大已知$ r $ - 过程增强星星的样本，我们开发了一种方法，通过将观察到的光谱与6645.1 AA的EU II系周围的合成模板匹配，以匹配观察到的光谱与欧盟II线周围的合成模板。我们从12,209个独特的恒星中获得了13个金属贫困的样本（$ -2.35 <{\ rm [fe/h]} <-0.91 $）的候选人，其中有32,774个中等分辨率光谱。这些候选人将在不久的将来通过高分辨率随访的观察进一步研究。描述了这种努力的扩展，以包括较大的恒星样本，特别是在较低金属性下使用BA II线在6496.9 AA的强度。
The abundance patterns of $r$-process-enhanced stars contain key information required to constrain the astrophysical site(s) of $r$-process nucleosynthesis, and to deepen our understanding of the chemical evolution of our Galaxy. In order to expand the sample of known $r$-process-enhanced stars, we have developed a method to search for candidates in the LAMOST medium-resolution ($R \sim 7500$) spectroscopic survey by matching the observed spectra to synthetic templates around the Eu II line at 6645.1 AA. We obtain a sample of 13 metal-poor ($-2.35<{\rm [Fe/H]}<-0.91$) candidates from 12,209 unique stars with 32,774 medium-resolution spectra. These candidates will be further studied by high-resolution follow-up observations in the near future. Extensions of this effort to include larger samples of stars, in particular at lower metallicity, using the strength of the Ba II line at 6496.9 AA, are described.
