On the rotationally driven pevatron in the centre of the Milky Way

TL;DR

This paper proposes a two-stage plasma acceleration mechanism near the Milky Way's center black hole, explaining the recent detection of PeV protons by converting gravitational energy into particle kinetic energy.

Contribution

It introduces a novel plasma-based acceleration process involving Langmuir waves and Landau damping to account for PeV proton energies in the galactic center.

Findings

Proton energies can reach up to 5 PeV in the GC plasma environment.

The mechanism links gravitational energy to particle acceleration via plasma wave interactions.

The model explains recent PeV proton detections near the galactic center.

Abstract

Based on the collective linear and nonlinear processes in a magnetized plasma surrounding the black hole at the galactic center (GC), an acceleration mechanism is proposed to explain the recent detection/discovery of PeV protons. In a two stage process, the gravitation energy is first converted to the electrical energy in fast growing Langmuir waves, and then the electrical energy is transformed to the particle kinetic energy through Landau damping of waves. It is shown that, for the characteristics parameters of GC plasma, proton energy can be boosted upto 5PeV.