Barium dwarfs with white dwarf companions

We report three new barium (Ba) dwarfs lying in Sirius-like systems. They provide direct evidence that Ba dwarfs are companions to white dwarfs (WDs). Atmospheric parameters,...本文报道了三颗位于类天狼星系统（Sirius-like systems）中的新型钡矮星（Ba dwarfs）。该三颗天体为"钡矮星是白矮星（white dwarfs，缩写为WDs）的伴星"这一科学结论提供了直接观测证据。大气参数等……