Synchrotron emission driven by the Cherenkov-drift instability in active
  galactic nuclei
  In the present paper we study generation of the synchrotron emission by means
of the feedback of Cherenkov drift waves on the particle distribution via the
diffusion process. It is shown that despite the efficient synchrotron losses
the excited Cherenkov drift instability leads to the quasi-linear diffusion
(QLD), effect of which is balanced by dissipation factors and as a result the
pitch angles are prevented from damping, maintaining the corresponding
synchrotron emission. The model is analyzed for a wide range of physical
parameters and it is shown that the mechanism of QLD guarantees the generation
of electromagnetic radiation from soft $X$-rays up to soft $\gamma$-rays,
strongly correlated with Cherenkov drift emission ranging from IR up to UV
energy domains.
