Element abundances study of Cepheids

Radial abundance gradients provide sound constraints for chemo-dynamical models of galaxies. Azimuthal variations of abundance ratios are solid diagnostics to understand their...径向丰度梯度（Radial abundance gradients）可为星系的化学动力学模型提供可靠的约束条件。丰度比的方位变化是理解其相关特性的可靠诊断手段，可用于……