Faint progenitors of luminous $z\sim 6$ quasars: why don't we see them?

Edwige Pezzulli, Rosa Valiante, Maria C. Orofino +3

Observational searches for faint active nuclei at $z>6$ have been extremely elusive, with a few candidates whose high-$z$ nature is still to be confirmed. Interpreting this lack…