Confinement of Cosmic Rays in Dark Matter clumps

TL;DR

This paper explores how dark matter clumps could influence cosmic ray propagation by affecting galactic magnetic fields through annihilation products, revealing potential impacts on cosmic ray diffusion.

Contribution

It introduces a novel mechanism linking dark matter clumps to small-scale magnetic field irregularities and cosmic ray diffusion.

Findings

Dark matter annihilation in clumps can generate charged particles affecting magnetic fields.

Small-scale magnetic irregularities can alter cosmic ray diffusion.

Dark matter clumps may impact cosmic ray propagation models.

Abstract

Some part of the relic Dark Matter is distributed in small-scale clumps which survived structure formation in inflation cosmological scenario. The annihilation of DM inside these clumps is a strong source of stable charged particles which can have a substantial density near the clump core. The streaming of the annihilation products from the clump can enhance irregularities in the galactic magnetic field. This can produce small scale variations in diffusion coefficient affecting propagation of Cosmic Rays.