Radial velocities measurements of Castor Aa and Ba
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Castor is a system of six stars in which the two brighter objects, Castor A and B, revolve around each other every ~450yr and are both short-period spectroscopic binaries. They...
北河二(Castor)是一个由六颗恒星组成的恒星系统,其中两颗较亮的成员——北河二A(Castor A)与北河二B(Castor B)——每约450年相互绕转一周,且二者均为短周期分光双星(spectroscopic binaries)。它们……



