Diffuse Josephson Radiation in Turbulence

TL;DR

This paper explores how plasma turbulence in astronomical media can generate diffuse radiation through Josephson junction-like behavior, potentially explaining weak radio backgrounds.

Contribution

It introduces a novel model linking plasma turbulence to Josephson junction phenomena, providing a new perspective on diffuse astronomical radiation sources.

Findings

Turbulence modeled as magnetic filaments and voids influences radiation emission.

Josephson oscillations in plasma can produce weak radio backgrounds.

Low-frequency Josephson effects may generate quasi-stationary magnetic fields.

Abstract

The possibility of generating diffuse radiation in extended astronomical media by plasma turbulence is investigated under the assumption that the turbulence can be understood as an ensemble of small-scale magnetic filaments (narrow current sheets) forming a texture around a large number of magnetic depletions (voids). On astronomically microscopic scales the dilute high temperature medium (plasma) is to be considered ideally conducting forming a collection of Josephson junctions between two such adjacent quasi-superconductors. The oscillation frequency of those junctions depends on the part of the spectrum that contributes to the oscillation causing weak {radio backgrounds}. Lowest Josephson frequencies/energies near zero may become sources of quasi-stationary magnetic fields.