论文标题
部分可观测时空混沌系统的无模型预测
Massive stars in metal-poor dwarf galaxies are often extreme rotators
论文作者
论文摘要
我们通过测量附近金属贫困矮星系中的OBE恒星分数来探测早期宇宙中巨大恒星中的普遍迅速旋转。我们采用一种新方法，该方法使用宽带光度法来测量麦哲伦云中的星系范围内的OBE恒星分数和另外三个遥远的金属贫困矮星的星系。我们在大麦芽云（0.5 z_solar）中发现OBE星级分数约为20％，而小麦芽云（0.2 Z_Solar）以及So-Far未探索的金属性在0.1 Z_Solar的范围为0.1 Z_Solar到0.2 Z_Solar，由其他三个三矮人的其他三个矮人占据。我们的结果表明，在诸如早期宇宙之类的金属贫困环境中，巨大的恒星中的旋转极为迅速。
We probe how common extremely rapid rotation is among massive stars in the early universe by measuring the OBe star fraction in nearby metal-poor dwarf galaxies. We apply a new method that uses broad-band photometry to measure the galaxy-wide OBe star fractions in the Magellanic Clouds and three more distant, more metal-poor dwarf galaxies. We find OBe star fractions of ~20% in the Large Magellanic Cloud (0.5 Z_Solar), and ~30% in the Small Magellanic Cloud (0.2 Z_Solar) as well as in the so-far unexplored metallicity range from 0.1 Z_solar to 0.2 Z_solar occupied by the other three dwarf galaxies. Our results imply that extremely rapid rotation is common among massive stars in metal-poor environments such as the early universe.
