标题： 观测检验星系间富集模型 显示英文标题

标题： Observational Tests of Intergalactic Enrichment Models

摘要： 我们总结了近期利用“像素光学深度”技术评估星系际介质（IGM）碳和硅丰度的结果。我们简要讨论这些结果对星系际增富模型的意义，重点是如何区分由第一代恒星和天体在z >> 4时期的早期增富与由2 < z < 5时期的Lyman突破星系在晚期增富。然后，我们讨论观测到的类星体光谱与来自包含自洽增富的宇宙学模拟生成的模拟光谱之间的比较，并对z > 2时期星系际增富的整体图景得出定性推论。 显示英文摘要

摘要： We summarize recent results assessing the carbon and silicon abundances of the intergalactic medium (IGM) using the `pixel optical depth' technique. We briefly discuss the implications of these results for models of intergalactic enrichment, focusing on distinguishing `early' z >> 4 enrichment by the first generations of stars and objects from `late' enrichment by 2 < z < 5 Ly-break galaxies. We then discuss the comparison of observed QSO spectra to simulated spectra generated from cosmological simulations that self-consistently include enrichment, and draw qualitative implications for the general picture of intergalactic enrichment at z > 2.