Nitrogen-enhanced metal-poor stars

Theoretical models of very metal-poor intermediate-mass asymptotic giant branch (AGB) stars predict a large overabundance of primary nitrogen. The very metal-poor,...极贫金属（very metal-poor）中等质量渐近巨星支（asymptotic giant branch, AGB）恒星的理论模型预测，原生氮存在大幅超丰度。极贫金属……