高红移下的近原始气体：早期核合成的窗口
Near-pristine gas at high redshifts: a window on early nucleosynthesis
摘要：
现在人们已经认识到，阻尼莱曼α系统在帮助我们解开化学元素的起源方面发挥着重要作用。在本报告中，我们描述了最近完成的调查的最贫金属的DLAs的主要结果，旨在补充和扩展银河系中最古老的恒星的研究。这项调查澄清了一些悬而未决的问题，关于C，N，O的丰度在低金属度制度，揭示了存在DLA类似物的碳增强贫金属恒星，并提供了一些最精确的措施的原始丰度氘。
英文摘要：
It has now become recognised that damped Lyman alpha systems play an important role in helping us unravel the origin of chemical elements. In this presentation, we describe the main results of a recently completed survey of the most metal-poor DLAs, aimed at complementing and extending studies of the oldest stars in the Galaxy. The survey has clarified a number of lingering issues concerning the abundances of C, N, O in the low metallicity regime, has revealed the existence of DLA analogues to Carbon-enhanced metal-poor stars, and is providing some of the most precise measures of the primordial abundance of Deuterium.
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