金牛座η星的H_α发射短时标变化

On Short-Term Variability of Ha Emission Line in η Tau

在1990年12月—1991年1月期间,我们用2.16米望远镜卡焦摄谱仪的单光纤系统、红敏CCD探测器,对金牛座η星进行了三个夜晚观测,取得18条H_α波段的光谱.发现其H_α发射成分存在短时标变化.

Eighteen spectra of η Tau were obtained on Dec. 24 and 25, 1990 and Jan. 4, 1991 using All-Fiber-Coupler grating spectrograph of the 2.16m telescope at the Beijing Astronomical Observatory. We found that the Hα emission line of the star shows a short-term variability.