Elemental abundances of 4 Lac and nu Cep

Elemental abundance analysis based on high S/N and high resolution Dominion Astrophysical Observatory spectrograms have been performed for two early type supergiants: 4 Lac (B9...本研究针对两颗早型超巨星（4 Lac（B9……）），采用高信噪比（Signal-to-Noise Ratio, S/N）与高分辨率的自治领天体物理天文台（Dominion Astrophysical Observatory）光谱图开展了元素丰度分析。