Subdwarf A stars vs ELM WDs radial velocities

We address the physical nature of subdwarf A-type (sdA) stars and their possible link to extremely low mass (ELM) white dwarfs (WDs). The two classes of objects are confused in...本研究聚焦A型亚矮星（subdwarf A-type stars，sdA）的物理本质，及其与极低质量（ELM）白矮星（WDs）之间的潜在关联。这两类天体在……中存在混淆。