Arizona-Montreal survey of hot subdwarf stars

Hot subdwarf B (sdB) and O (sdO) type stars are evolved helium-burning objects that lost their hydrogen envelope before the helium flash when their progenitors were close to the...热亚矮星B型（sdB）与O型（sdO）恒星属于演化后的氦燃烧天体，它们在氦闪发生前便已丢失自身的氢包层，此时其前身星正处于接近……的状态。