The Evolution of O I over 3.2 < z < 6.5: Reionization of the Circumgalactic Medium

George D. Becker, Max Pettini, Marc Rafelski +11

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 to…