Properties of B and Be stars in h and {chi} Persei

We present a study of the B and Be star populations of the double cluster h and {chi} Persei. Blue optical spectroscopy is used to first measure projected rotational velocity,...本研究针对英仙座h与χ双星团中的B型恒星（B star）及Be型恒星（Be star）族群展开分析。研究首先采用蓝波段光学光谱法测量恒星的投影自转速度（projected rotational velocity）……