Light millicharged particles and large scale cosmic magnetic fields

TL;DR

This paper explores how hypothetical light millicharged particles could generate cosmic magnetic fields by inducing electric currents, potentially explaining observational data and contributing to dark matter.

Contribution

It introduces a novel mechanism where millicharged particles induce currents to generate large-scale magnetic fields, aligning with observations and expanding dark matter models.

Findings

Model successfully explains observed cosmic magnetic fields

Millicharged particles can account for up to 100% of dark matter

Proposes a new interaction mechanism for magnetic field generation

Abstract

After a brief review of different types of scenarios suggested for the solution of the problem of galactic and intergalactic magnetic field generation, the mechanism based on the electric current induction by hypothetical millicharged particles interacting with electrons in cosmic medium is discussed. The proposed model successfully describes observational data. The new light millicharged particles can contribute from a small fraction up to 100% to the cosmological dark matter.