论文标题
在开放群集M67中太阳能双胞胎的李丰度
Li abundances for solar twins in the open cluster M67
论文作者
论文摘要
我们确定了M67开放群集中太阳能双胞胎的锂（Li）丰度，以添加有关Li Deptetion和Stellar Gem之间相关性的宝贵信息，然后更好地了解恒星结构和演变。我们使用高分辨率和良好的信噪比光谱来表征来自M67的三个太阳能双胞胎中的LI耗竭，并在不对称的6707.75Å\ li I特征的区域中使用光谱合成。我们的M67太阳能双胞胎样本（我们的三颗星以及文献先前分析中的第四个太阳能双胞胎）的平均li丰度值（li）$ = 1.6 \ pm0.2 $ dex列出了其年龄的li丰度。同样，这项工作中LI丰度的标准偏差所估计的散射类似于文献中提出的野外太阳能双胞胎样本中发现的典型散射。
We determine lithium (Li) abundances for solar twins in the M67 open cluster to add valuable information about the correlation between Li depletion and stellar age and, then, better understand stellar structure and evolution. We use high resolution and good signal-to-noise ratio spectra to characterize Li depletion in three solar twins from M67, using spectral synthesis in the region of the asymmetric 6707.75 Å\, Li I feature. The mean Li abundance value of A(Li)$=1.6\pm0.2$ dex for our sample of M67 solar twins (our three stars plus a fourth solar twin from a previous analysis in the literature) presents Li abundance expected for its age. Also, the scatter estimated from the standard deviation of the Li abundances in this work is similar to the typical scatter found in a sample of field solar twins presented in the literature.
