42 citations · 109 across the 7 of their papers we have counts for
1 paper · 2 filters
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…