论文标题
三个小钡星星的光谱轨道
Spectroscopic orbits of three dwarf barium stars
论文作者
论文摘要
人们认为钡星是由于宽足够宽的二进制演化而产生的，以使更大的成分到达渐近巨型分支，并最终成为CO白矮人。尽管BA恒星最初仅在巨型或次巨星中才知道，但随后在主序列上也发现了一些恒星（被称为矮ba恒星）。我们在这里提供了三个小矮人BA星的轨道参数，完成了Escorza等人最近发布的27条轨道的样品。这三个南方目标。我们表明，这些新的轨道参数与其他矮人BA恒星的参数一致。
Barium stars are thought to result from binary evolution in systems wide enough to allow the more massive component to reach the asymptotic giant branch and eventually become a CO white dwarf. While Ba stars were initially known only among giant or subgiant stars, some were subsequently discovered also on the main sequence (and known as dwarf Ba stars). We provide here the orbital parameters of three dwarf Ba stars, completing the sample of 27 orbits published recently by Escorza et al. with these three southern targets. We show that these new orbital parameters are consistent with those of other dwarf Ba stars.
