Speaker
Description
Fast Radio Bursts are usually discussed in terms of magnetospheric emission, relativistic outflows, or compact-object interactions, but their possible connection with accretion-driven variability remains comparatively underexplored. In this contribution, we examine a dynamical channel in which Kozai–Lidov cycles in hierarchical compact triples periodically drive the inner binary to high eccentricity, allowing short-lived phases of enhanced mass transfer, tidal stressing, or magnetosphere–plasma interaction. The central question is not whether Kozai–Lidov dynamics directly produces coherent radio emission, but whether it can provide the external clock and physical trigger for accretion-mediated FRB-like bursts in systems containing neutron stars, magnetars, white dwarfs, or low-mass black holes.
We outline a semi-analytical feasibility study based on secular timescales, eccentricity excitation, pericentre distance, Roche-lobe overflow conditions, and magnetospheric length scales. The goal is to identify regions of parameter space in which episodic accretion or impulsive plasma injection can occur without immediately destroying the system, thereby allowing either repeating activity or clustered burst episodes. Particular attention is given to the expected observational discriminants: activity windows tied to the long-term dynamical cycle, radio bursts with possible X-ray non-detections or weak counterparts, variable dispersion and rotation measures from the circumbinary environment, and departures from purely isolated-magnetar scenarios.
This framework places FRB-like coherent radio transients within the broader phenomenology of accretion-driven variability in compact systems. It also provides a falsifiable bridge between radio transient astronomy and high-energy accretion physics: if viable, the model predicts specific timing, environmental, and multi-wavelength signatures; if not, it constrains the role of dynamical triples in the FRB population.