The role of galaxies and AGN in reionizing the IGM - II: metal-tracing the faint sources of reionization at $5\lesssim z\lesssim6$

20 Jul 2018Romain A. MeyerSarah E. I. BosmanKoki KakiichiRichard S. Ellis

We present a new method to study the contribution of faint sources to the UV background using the cross-correlation of metal absorbers with the intergalactic medium (IGM) transmission in a proximate Quasi Stellar Object (QSO) sightline. We take advantage of a sample of $25$ high signal-to-noise ratio QSO spectra to retrieve $146$ triply-ionised carbon (\cfour) absorbers at $4.5\lesssim z\lesssim 6.2$, of which $37$ systems whose expected H{~\small I} absorption lie in the Lyman-$\alpha$ forest... (read more)

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