Radial orbit instability as a dissipation-induced phenomenon

TL;DR

This paper reinterprets Radial Orbit Instability in self-gravitating systems through Dissipation-Induced Instability theory, providing a simplified energetic proof and clarifying the physical mechanism involved.

Contribution

It introduces a new perspective by applying Dissipation-Induced Instability theory to Radial Orbit Instability, offering a clearer understanding and a simplified proof.

Findings

Provides a new theoretical framework for Radial Orbit Instability

Offers a simplified energetic proof of the instability

Clarifies the physical mechanism behind the instability

Abstract

This paper is devoted to Radial Orbit Instability in the context of self-gravitating dynamical systems. We present this instability in the new frame of Dissipation-Induced Instability theory. This allows us to obtain a rather simple proof based on energetics arguments and to clarify the associated physical mechanism.