l Car radial velocity curves

This work reports the discovery of cycle-to-cycle modulated spectral line and atmospheric velocity gradient variability in long-period Cepheids based on 925 high-resolution...本研究基于925份高分辨率（high-resolution）数据，报道了长周期造父变星（long-period Cepheids）中存在逐周期调制的谱线与大气速度梯度变异性的发现。