XO-2S and XO-2N chemical composition

Using high-quality spectra of the twin stars in the XO-2 binary system, we have detected significant differences in the chemical composition of their photospheres. The...本研究基于XO-2双星系统（binary system）中双子恒星的高质量光谱，探测到二者光球层（photosphere）的化学成分存在显著差异。The...