42 citations · 55 across the 6 of their papers we have counts for
1 paper · 1 filter
L. Zappacosta, E. Piconcelli, F. Fiore +40
The existence of luminous quasars (QSO) at the Epoch of Reionization (EoR; i.e. z>6) powered by supermassive black holes (SMBH) with masses ≳109 M⊙ challenges models…