首页> 外文期刊>The Astrophysical Journal. Letters >CHEMICAL ENRICHMENT IN THE CARBON-ENHANCED DAMPED Lya SYSTEM BY POPULATION III SUPERNOVAE
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CHEMICAL ENRICHMENT IN THE CARBON-ENHANCED DAMPED Lya SYSTEM BY POPULATION III SUPERNOVAE

机译:种群III超新星在碳增强的阻尼Lya系统中的化学富集

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摘要

We show that the recently observed elemental abundance pattern of the carbon-rich metal-poor damped Lya (DLA) system is in excellent agreement with the nucleosynthesis yields of faint core-collapse supernovae of primordial stars. The observed abundance pattern is not consistent with the nucleosynthesis yields of pair-instability supernovae. The DLA abundance pattern is very similar to that of carbon-rich extremely metal-poor (EMP) stars, and the contributions from low-mass stars and/or binary effects should be very small in DLAs. This suggests that chemical enrichment by the first stars in the first galaxies is driven by core-collapse supernovae from ~20 to 50 M_⊙ stars and also supports the supernova scenario as the enrichment source of EMP stars in the Milky Way Galaxy.
机译:我们表明,最近观察到的富碳贫金属阻尼Lya(DLA)系统的元素丰度模式与原始恒星昏暗的核塌陷超新星的核合成产率非常吻合。观测到的丰度模式与成对不稳定性超新星的核合成产率不一致。 DLA的丰度模式与富含碳的极贫金属(EMP)恒星非常相似,并且DLA中低质量恒星和/或双星效应的贡献应该很小。这表明第一颗星系中第一颗恒星的化学富集是由核心坍缩的超新星驱动的,该超新星从约20个M_⊙恒星升至50个M_⊙星,并且也支持超新星场景作为银河系EMP恒星的富集源。

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