Evolution of the Jet-Feedback Mechanism (JFM)
  I list eight types of astrophysical objects where jets, and more particularly
the jet feedback mechanism (JFM), might operate, and discuss cases where an
object evolves from one type to another while the JFM continues to operate. In
four of these classes of objects jets are known to play significant, or even
crucial, roles: in cooling flows, during galaxy formation, in young stellar
objects (YSO), and in planetary nebulae. In core collapse supernovae (CCSNe),
in the common envelope evolution (CEE), in the grazing envelope evolution
(GEE), and in intermediate-luminosity optical transients (ILOTs) the suggestion
that a JFM takes place is still controversial. I call for a refresh thinking
and more detail studies of the possibility that jets play a large role in
exploding massive stars and in the CEE. I also present a new speculative
scenario where the first active galactic nuclei (AGN) were preceded by a JFM
that operated during the life time of the supermassive young object (SMYO)
progenitor of the AGN. A short and energetic phase of CCSN took place between
the SMYO and the AGN phases. I term this scenario of young object to supernova
to AGN (YOSA) that includes a JFM along all stages, the YOSA-JFM scenario. I
speculate that in the YOSA-JFM scenario, the JFM that might have operated
during the phase of the SMYO started to establish the correlations between the
mass of the super-massive black hole (SMBH) and some properties of the stellar
component of galaxies before the formation of the SMBH.
