Abstract—This work is a continuation of the studies of the ultrafast variability of line profiles in the spectra of early-type stars. Line profile variations in the spectrum a chemically peculiar A0Vp star α² CVn are investigated using the January 6, 2020 observations carried out with the 6-meter BTA telescope at SAO RAS equipped with the MSS spectrograph. Regular short-term periodic variations of the Hβ, FeII, and CrII lines were detected with periods ranging from 4 to 140 minutes. The magnetic field of the star was determined for all observations. The average measured longitudinal magnetic field component over the entire duration of observations is about 600 G, which is close to the value expected from the well-known magnetic field phase curve.

摘要—这项工作是对早期型恒星光谱中线剖面的超快变化性研究的延续。在频谱线轮廓的变化化学特有A0Vp星α ² CVN使用1月6日的调查，2020个观测与在SAO RAS 6米BTA望远镜配备了MSS摄谱仪进行。检测到Hβ，FeII和CrII线的定期短期周期性变化，周期为4至140分钟。确定所有观测的恒星磁场。在整个观察过程中，平均测得的纵向磁场分量约为600 G，接近于众所周知的磁场相位曲线所期望的值。