Discovery of hot subdwarf companion to FY CMa

The rapid rotation of Be stars may be caused in some cases by past mass and angular momentum accretion in an interacting binary in which the mass donor is currently viewed as a...在部分情况下，Be星（Be stars）的快速自转可能由其曾在相互作用双星系统中经历的质量与角动量吸积过程所引发，该系统中的质量供体目前被认为是一个……