恒星活动对LiI 6708、NaI 5896和KI 7699谱线的影响：与昴星团、场星和太阳的比较
The effect of stellar activity on the LiI 6708, NaI 5896 and KI 7699 Ålines: A comparison with the Pleiades, field stars and the Sun
摘要：
本文建立了一个分析模型，并考虑到恒星星等和颜色的变化，从经验上研究了恒星黑子和光斑对晚型恒星中Li { \sc i} 6708，Na { \sc i} 5896和K { \sc i} 7699等离子体谱线等效宽度（以及锂的丰度）的影响。对应于不同的活动区域的太阳光谱被用作输入数据，并应用一系列填充因子来模拟具有不同活动水平的恒星表面。预测和观察到的光度颜色和等效宽度之间的详细比较晚型恒星的昴星团和字段。观测到的K { \sc i}和Li { \sc i}等效宽度的色散可以部分地由活动对颜色和谱线形成的同时影响来解释，这表明对于大约0.7-0.9 Msun的昴星团恒星所建议的锂-旋转连接可能部分地归因于恒星活动。然而，在填充因子的实际值下，只有一小部分观察到的价差可以用这些效应来解释
英文摘要：
An analytical model has been developed to empirically study the effects of stellar spots and faculae on the observed equivalent widths of Li {\sc i} 6708, Na {\sc i} 5896 and K {\sc i} 7699 Ålines (and abundances in the case of lithium) in late-type stars, taking into account the changes in the observed magnitudes and colors. Solar spectra corresponding to different active regions are used as input data and a range of filling factors are applied to simulate the surfaces of stars with different levels of activity. Detailed comparisons between predicted and observed photometric colors and equivalent widths are made for late-type stars of the Pleiades and the field. The observed dispersions in K {\sc i} and Li {\sc i} equivalent widths for Pleiades stars can be partially accounted by the simultaneous effects of activity on colors and the line formation, indicating that the lithium-rotation connection suggested for ~0.7-0.9 Msun Pleiades stars could be due in part to the stellar activity. However, under realistic values for the filling factors, only a small portion of the observed spread could be explained by these effects
机构、总结、中文摘要均由AI分析而来，可能存在错误，请以论文正文为准。
