Radial velocities of ER Vul
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ER Vul is an eclipsing binary consisting of two solar type stars in a very close orbit with a period of 0.7d. Accordingly, the two stars rotate very fast, leading to a blending...
ER Vul为一颗食双星（eclipsing binary），由两颗类太阳恒星（solar type stars）组成，二者处于极近轨道中，轨道周期为0.7天。因此，这两颗恒星自转速度极快，进而导致混叠（blending）现象……
