论文标题
金属丰富的田野RR Lyre星中精选元素的丰度的特殊性
Peculiarities of Abundances of Selected Elements in Metal-Rich Field RR Lyrae Stars
论文作者
论文摘要
我们使用分类分类目录的数据来测定银河系大气中的元素丰度RR Lyrae类型变量的数据，以表明金属富含金属的RR Lyraes（$ \ rm {[fe/h]}> -1.0 $）具有某些元素的异常丰富性。特别是，金属丰富的RR Lyrae类型变量中scand，钛和YTTrium的相对丰度低于超出误差的类似金属性的田间恒星中的相应丰度。我们讨论了上述元素丰度确定的错误，并指出了一个事实，即没有用于金属富含金属的RR Lyre类型变量的欧洲，锆和灯笼丰度确定。我们还分析了金属富含RR Lyrae型变量的化学组成的观察到的各种可能原因。
We use the data of our extended catalog of spectroscopic determinations of elemental abundances in the atmospheres of Galactic-field RR Lyrae type variables to show that metal-rich RR Lyraes ($\rm{[Fe/H]} > -1.0$) have anomalous abundances of some elements. In particular, the relative abundances of scandium, titanium, and yttrium in metal-rich RR Lyrae type variables are lower than the corresponding abundances in field stars of similar metallicity beyond the errors. We discuss the errors of the determination of the abundances of the above elements and point out the fact that no europium, zirconium, and lanthanum abundance determinations are available for metal-rich RR Lyrae type variables. We also analyze various possible causes of the observed peculiarities of the chemical composition of metal-rich RR Lyrae type variables.
