Abstract—The variability of radial velocities, equivalent widths and central line depths in the spectrum of the κ Cas supergiant was studied using CCD coude-echelle spectra with high spectral resolution and signal-to-noise ratio. The radial velocity variability of all the studied lines is due to non-radial pulsations. The variability parameters (period P, amplitude A and average value γ) of radial velocity, equivalent width and central depth of the lines were determined. These parameters differ for different lines. Based on the calculation of the formation depth of the lines log τ_λ, the stratification of these parameters in the atmosphere of the star was studied. For the radial velocity, the period, amplitude, and rate of expansion (γ-velocity) increase from the lower to the upper layers of the atmosphere. The amplitudes of variability of the equivalent widths and central depths of the lines also increase with the height in the atmosphere.

中文翻译：

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κCas大气的非平稳性。三，大气运动学

摘要—使用具有高光谱分辨率和信噪比的CCD Coude-echelle光谱研究了κCas超巨星光谱中的径向速度，等效宽度和中心线深度的变化。所有研究线的径向速度变化是由于非径向脉动引起的。确定线的径向速度，等效宽度和中心深度的可变性参数（周期P，振幅A和平均值γ）。这些参数针对不同的行而有所不同。基于计算线的形成深度_logτλ，研究了这些参数在恒星大气中的分层。对于径向速度，周期，振幅和膨胀率（γ速度）从大气的较低层到较高层增加。线的等效宽度和中心深度的变化幅度也随大气层的高度而增加。