THE AM BINARY STAR RR LYN - CHEMICAL-COMP OSITION OF THE COMPONENTS

The chemical composition of the components in the eclipsing binary sys tem RR Lyn, previously classified as an Am star, was analyzed, and it is shown to be peculiar in both components. The hotter and more massiv e star A exhibits features typical of Am stars; many chemical elements show excesses that tend to grow with increasing atomic number Z. In t he less massive star B, most elements proved to be deficient; however, in this case, the characteristic trend of the chemical anomalies with increasing Z is also observed. There is a systematic abundance differ ence between components A and B, which amounts to -0.6 dex, on the ave rage. For comparison, the ''average'' chemical composition of RR Lyn w as derived on the assumption that this system is considered as a singl e star. On the whole, it was found to be closer to the composition of the main component A; however, the abundances proved to be lower than in A by a factor of 2, on the average.