论文标题
银河系晕场RR Lyre的金属性分布以及金属性对其脉动特性的影响
Metallicity Distribution of Galactic Halo Field RR Lyrae, and the Effect of Metallicity on their Pulsation Properties
论文作者
论文摘要
我们使用公开可用的调查中的数据，介绍了我们对我们在紫外线，光学和红外波长处得出高质量光度法的大型样品（超过150k）的候选银河RR Lyre（RRL）恒星的分析。对于这些恒星的子样本（〜2,400个基本模式场RRL），我们使用Delta S方法测量了它们的个体金属性，从而导致收集的RRL收集的最大，最均匀的光谱数据集。我们使用该样品研究银河光环中的金属性分布，包括银河球状簇之间的Oosterhoff二分法的长期问题。我们还从[Fe/H]的丰度中分析了它们的脉动特性的依赖性，尤其是其红外光曲线的形状。
We present our analysis of a large sample (over 150k) of candidate Galactic RR Lyrae (RRL) stars for which we derived high quality photometry at UV, optical and infrared wavelengths, using data from publicly available surveys. For a sub-sample of these stars (~2,400 fundamental mode field RRLs) we have measured their individual metallicity using the Delta S method, resulting in the largest and most homogeneous spectroscopic data set collected for RRLs. We use this sample to study the metallicity distribution in the Galactic Halo, including the long-standing problem of the Oosterhoff dichotomy among Galactic globular clusters. We also analyze the dependence of their pulsation properties, and in particular the shape of their infrared light curves, from their [Fe/H] abundance.
