Possible Evolution of Supermassive Black Holes from FRI quasars
  We explore the question of the rapid buildup of black hole mass in the early
universe employing a growing black hole mass-based determination of both jet
and disk powers predicted in recent theoretical work on black hole accretion
and jet formation. Despite simplified, even artificial assumptions about
accretion and mergers, we identify an interesting low probability channel for
the growth of one billion solar mass black holes within hundreds of millions of
years of the Big Bang without appealing to super Eddington accretion. This
result is made more compelling by the recognition of a connection between this
channel and an end product involving active galaxies with FRI radio morphology
but weaker jet powers in mildly sub-Eddington accretion regimes. While FRI
quasars have already been shown to occupy a small region of the available
parameter space for black hole feedback in the paradigm, we further suggest
that the observational dearth of FRI quasars is also related to their
connection to the most massive black hole growth due to both these FRIs high
redshifts and relative weakness. Our results also allow us to construct the AGN
luminosity function at high redshift, that agree with recent studies. In short,
we produce a connection between the unexplained paucity of a given family of
active galactic nuclei and the rapid growth of supermassive black holes, two
heretofore seemingly unrelated aspects of the physics of active galactic
nuclei.
