Barium abundances in Cepheids

We derived the barium atmospheric abundances for a large sample of Cepheids, comprising 270 stars. The sample covers a large range of Galactocentric distances, from about 4 to...

本研究针对由270颗造父变星（Cepheids）构成的大样本恒星，推导得到了其大气中的钡元素丰度。该样本覆盖了约4至……的大范围银心距（Galactocentric distances）。