论文标题
关于球状簇中多个恒星种群对中分辨率集成光谱的影响
On the influence of multiple stellar populations in globular clusters on their medium-resolution integrated-light spectra
论文作者
论文摘要
我们仔细研究了我们公开的确定年龄，金属性，氦质量分数以及在银河球状簇中的化学元素的丰度，以便找到这些数据中多个恒星种群现象的可能标志。我们的分析表明，在研究簇中，恒星大气中的碳丰度在演变过程中逐渐变化。通过将我们的结果与银河系恒星的化学演化和文献数据模型进行比较，检测到氦气质量分数和C，O，Mg和Na丰度异常的变化。
We take a closer look at our published results of determination of ages, metallicities, helium mass fractions and abundances of chemical elements in Galactic globular clusters in order to find possible signatures of the phenomenon of multiple stellar populations in these data. Our analysis reveals that carbon abundances in the atmospheres of stars in the studied clusters change gradually during their evolution. The changes of the helium mass fraction and C, O, Mg and Na abundance anomalies caused by the effect of multiple stellar populations on the analyzed integrated-light spectra are detected through the comparison of our results with models of chemical evolution and literature data for Galactic field stars.
