Low mode approximation in the axion magnetohydrodynamics
arXiv:2502.20839 · doi:10.1142/S0218271825410019
Abstract
We study the evolution of interacting large scale magnetic and axionic fields. Based on the new induction equation accounting for the contribution of spatially inhomogeneous axions, we consider the evolution of a magnetized spherical axion structure. Using the thin layer approximation, we derive the system of the nonlinear ordinary differential equations for harmonics of poloidal and toroidal magnetic fields, as well as for the axion field. In this system, we account for up to four modes. Considering this small and dense axion clump to be in a solar plasma, we numerically simulate the evolution of magnetic fields. We obtain that the behavior of magnetic fields depends on the initial fields configuration. Moreover, we find an indication on a magnetic field instability in the magnetohydrodynamics with inhomogeneous axions.
13 pages, 10 eps figures; contribution to the proceedings of 7th International Conference on Particle Physics and Astrophysics (Moscow, Russia, October 22-25, 2024); to be published in the special issue of Int.J.Mod.Phys.D
References in corpus (12)
- Dilute and dense axion stars
- Recent Progress in the Physics of Axions and Axion-Like Particles
- Investigating the gamma-ray burst from decaying MeV-scale axion-like particles produced in supernova explosions
- Implications of a Primordial Magnetic Field for Magnetic Monopoles, Axions, and Dirac Neutrinos
- Solar Extreme UV radiation and quark nugget dark matter model
- An Effective Field Theory for Large Oscillons
- Evolution of axions in the presence of primordial magnetic fields
- Radio impulsive events in quiet solar corona and Axion Quark Nugget Dark Matter
- Magnetic dynamo caused by axions in neutron stars
- The Extended Solar Cycle and Asymmetry of the Large-Scale Magnetic Field
- Interaction of inhomogeneous axions with magnetic fields in the early universe
- Magnetic fields in inhomogeneous axion stars