On the Role of the Curvature Drift Instability in the Dynamics of Electrons in Active Galactic Nuclei

Abstract

We study the influence of the centrifugally driven curvature drift instability (CDI) on the dynamics of relativistic electrons in the magnetospheres of active galactic nuclei (AGN). We generalize our previous work by considering relativistic particles with different initial phases. Considering the Euler, continuity, and induction equations, by taking into account the resonant conditions, we derive the growth rate of the CDI. We show that due to the centrifugal effects, the rotational energy is efficiently pumped directly into the drift modes, that leads to the generation of a toroidal component of the magnetic field. As a result, the magnetic field lines transform into such a configuration when particles do not experience any forces and since the instability is centrifugally driven, at this stage the CDI is suspended.

Radio emission of magnetars driven by the quasi-linear diffusion

“…The mechanism of QLD was applied to pulsars and active galactic nuclei in a series of papers: (Malov & Machbeli 2001;Osmanov 2013;). In the framework of the mechanism, the synchrotron radiation appears by means of the feedback of the cyclotron waves on relativistic particles due to the diffusion, and as a result, the pitch angles are arranged according to the aforementioned balance.…”