论文标题
一种无监督的方法，用于直接从Spectra中识别$ x $富集的星星：li in lamost
An unsupervised method for identifying $X$-enriched stars directly from spectra: Li in LAMOST
论文作者
论文摘要
具有特殊元素丰度的恒星是化学富集机制的重要标记。我们提出了一种简单的方法，即切入空间投影（TSP），用于检测$ x $的星星，即使是从混合线中，也是任意元素$ x $的。我们的方法不需要出色的标签，而是直接估算了其他未标记光谱的反事实单谱。作为一个案例研究，我们将此方法应用于Lamost DR5的6708〜 $ÅLiDoublet，并在整个进化状态下无缝地识别了8,428颗Li-富集的恒星。我们评论了有关不同亚群（包括行星增生，非标准混合和青年）的解释的解释。
Stars with peculiar element abundances are important markers of chemical enrichment mechanisms. We present a simple method, tangent space projection (TSP), for the detection of $X$-enriched stars, for arbitrary elements $X$, even from blended lines. Our method does not require stellar labels, but instead directly estimates the counterfactual unrenriched spectrum from other unlabelled spectra. As a case study, we apply this method to the $6708~$Å Li doublet in LAMOST DR5, identifying 8,428 Li-enriched stars seamlessly across evolutionary state. We comment on the explanation for Li-enrichement for different subpopulations, including planet accretion, nonstandard mixing, and youth.
