New mechanism of acceleration of particles by stellar black holes

TL;DR

This paper investigates how stellar black holes can accelerate particles to ultra-high energies through a process involving charge separation, Langmuir wave excitation, and collapse, revealing a new acceleration mechanism.

Contribution

It introduces a novel mechanism involving parametric instability and Langmuir wave collapse in black hole magnetospheres for particle acceleration.

Findings

Particles can reach energies around 10^{16} eV.

Charge separation undergoes parametric instability.

Langmuir waves facilitate energy transfer to particles.

Abstract

In this paper we study efficiency of particle acceleration in the magnetospheres of stellar mass black holes. For this purpose we consider the linearized set of the Euler equation, continuity equation and Poisson equation respectively. After introducing the varying relativistic centrifugal force, we show that the charge separation undergoes the parametric instability, leading to generation of centrifugally excited Langmuir waves. It is shown that these waves, via the Langmuir collapse damp by means of the Landau damping, as a result energy transfers to particles accelerating them to energies of the order of $10^{16}$eV.