OI abs. search in Keck and VLT spectra of 199 QSOs

We present a survey for metal absorption systems traced by neutral oxygen over 3.2<z<6.5. Our survey uses Keck/ESI and VLT/X-Shooter spectra of 199 QSOs with redshifts up...我们针对红移3.2<z<6.5范围内、以中性氧为示踪探针的金属吸收系统开展了一项巡天研究。本次巡天采用了199颗红移至高……的类星体（Quasi-Stellar Object, QSO）的凯克望远镜/ESI与甚大望远镜/X-Shooter光谱数据。