Diffuse Josephson Radiation in Turbulence

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 or 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.

Small‐amplitude kinetic Alfvén solitons for hot electrons taking regularized kappa distribution in Earth's inner magnetosphere

“…[34] When electrons follow the (r, q) distribution, the flat tops at low energies of the electron distribution are responsible for the formation of compressive solitary structures, whereas the spikes at low energies allow the formation of both compressive and rarefactive solitary structures. [35] As to the non-Maxwellian distribution mentioned above, the kappa distribution firstly introduced by Stan Olbert in 1966 [36] was the most popular one of them. It has been used extensively to explain various space observations.…”

“…As to the non‐Maxwellian distribution mentioned above, the kappa distribution firstly introduced by Stan Olbert in 1966 [ 36 ] was the most popular one of them. It has been used extensively to explain various space observations.…”