Metal absorption systems in pairs of QSOs

We present the first large sample of metal absorption systems in pairs of QSOs with sightlines separated by about 1Mpc at z=2. We found 690 absorption systems in the spectra of...

本研究首次报道了红移z=2、视线间距约1兆秒差距（Megaparsec, Mpc）的类星体（Quasi-Stellar Object, QSO）对中的金属吸收系统大样本。我们在……的光谱中发现了690个吸收系统。