论文标题
新发现的年轻恒星流PSC-ERI（Meingast 1）中的锂旋转连接（Meingast 1）
The lithium-rotation connection in the newly discovered young stellar stream Psc-Eri (Meingast 1)
论文作者
论文摘要
语境。作为脆弱的元素，锂是对恒星内部发生的物理过程的敏感探针。目标。我们旨在研究新发现的125〜Myr旧PSC-ERI恒星流的低质量成员的锂丰度与旋转速率之间的关系。方法。我们获得了高分辨率的光谱，并针对PSC-ERI流的40个成员测量了607.8 nm LII线的等效宽度，其旋转周期已由Arxiv：1905.10588得出。结果。我们表明，锂含量与PSC-ERI流的早期K型星之间存在紧密的相关性。快速旋转器在系统上是富裕的，而缓慢的旋转器则被剥离。这种趋势模仿了以前报道的类似年龄pleiades群集的趋势。结论。因此，在低质量恒星的有效温度范围内，锂旋转连接似乎是普遍的，在低质量恒星的有效温度范围内或接近零时代的主序列，并且不取决于环境条件。
Context. As a fragile element, lithium is a sensitive probe of physical processes occurring in stellar interiors. Aims. We aim at investigating the relationship between lithium abundance and rotation rate in low-mass members of the newly discovered 125~Myr-old Psc-Eri stellar stream. Methods. We obtained high resolution optical spectra and measure the equivalent width of the 607.8 nm LiI line for 40 members of the Psc-Eri stream, whose rotational periods have been derived by arXiv:1905.10588. Results. We show that a tight correlation exists between lithium content and rotation rate among the late-G to early K-type stars of the Psc-Eri stream. Fast rotators are systematically Li-rich, while slow rotators are Li-depleted. This trend mimics the one previously reported for the similar age Pleiades cluster. Conclusions. The lithium-rotation connection thus seems to be universal over a restricted effective temperature range for low-mass stars at or close to the zero-age main sequence, and does not depend on environmental conditions.
