Jet collision with accreting tori around SMBHs. GRHD and light surfaces
  constraints in aggregates of misaligned tori
  We explore the possibility of jet collisions with accreting tori orbiting
around SMBHs. The analysis provides constraints on formation and the
observational evidences of the host configurations. We use a GRHD model,
investigating the light surfaces contraints in aggregates of misaligned tori
orbiting a central static Schwarzschild black hole. Each (toroidal)
configuration of the agglomeration is a geometrically thick, pressure
supported, perfect fluid torus. Aggregates include proto-jets, the open cusped
solutions associated to the geometrically thick tori. Collision emergence and
the stability properties of the aggregates are considered at different
inclination angles relative to a fixed distant observer. We relate the
constraints to the relevant frequencies of the configurations and fluid
specific angular momentum, separating the constraints related to the fluids
hydrodynamics and to the geometric backgrounds. We analyze existence of
accreting tori supporting jet-emission. We discuss the existence of
orbit-replicas that could host shadowing effects in replicas of the emissions
in two regions, close and far from the BH (horizon replicas in jet shells). The
investigation clarifies the role of the pressure gradients of the orbiting
matter and the essential role of the radial gradient of the pressure in the
determination of the disk verticality. Finally we analyze the possibility that
a toroidal magnetic field could be related to the collimation of proto-jets.
