Solar axions as an energy source and modulator of the Earth magnetic field

TL;DR

This paper proposes a novel mechanism where solar axions influence Earth's magnetic field, suggesting a link between solar and geodynamo processes through axion-photon interactions, with estimations of axion properties.

Contribution

It introduces a new axion-based mechanism connecting solar and Earth's magnetic fields, with estimations of axion coupling and mass based on observed correlations.

Findings

Strong negative correlation between solar tachocline and Earth magnetic field.

Proposed axion mechanism explains the solar-terrestrial magnetic connection.

Estimated axion coupling constant and mass consistent with observations.

Abstract

We show existence of strong negative correlation between the temporal variations of magnetic field toroidal component of the solar tachocline (the bottom of convective zone) and the Earth magnetic field (Y-component). The possibility that hypothetical solar axions, which can transform into photons in external electric or magnetic fields (the inverse Primakoff effect), can be the instrument by which the magnetic field of convective zone of the Sun modulates the magnetic field of the Earth is considered. We propose the axion mechanism of "solar dynamo-geodynamo" connection, where an energy of axions, which form in the Sun core, is modulated at first by the magnetic field of the solar tachocline zone (due to the inverse coherent Primakoff effect) and after that is absorbed in the liquid core of the Earth under influence of the terrestrial magnetic field, thereby playing the role of an energy source and a modulator of the Earth magnetic field. Within the framework of this mechanism new estimations of the strength of an axion coupling to a photon (ga_gamma about 5*10^-9 GeV^-1) and the axion mass (ma ~ 30 eV) have been obtained.