Radio signals of particle dark matter

TL;DR

This paper explores the potential for detecting particle dark matter through its synchrotron radiation signatures in the radio background, focusing on intensity and anisotropy measurements.

Contribution

It introduces a novel approach to identify dark matter signals by analyzing radio background intensity and anisotropies caused by synchrotron radiation from high-energy electrons and positrons.

Findings

Dark matter annihilations/decays produce high-energy electrons and positrons.

Synchrotron radiation from these particles can be detected in radio and infrared bands.

Radio background anisotropies may reveal dark matter signatures.

Abstract

In most of particle dark matter (DM) models, the DM candidate injects sizable fluxes of high-energy electrons and positrons through its annihilations or decays. Emitted in regions with magnetic field, they in turn give raise to a synchrotron radiation, which typically covers radio and infrared bands. We discuss the possibility of detecting signatures of Galactic and extra-galactic DM in the total intensity and small-scale anisotropies of the radio background.