Turbulent axion-photon conversions in the Milky-Way

Understand

The Milky-Way magnetic field can trigger conversions between photons and axion-like particles (ALPs), leading to peculiar features on the observable photon spectra.

• Previous studies considered only the regular component of the magnetic field.
• However, observations consistently show the existence of an additional turbulent component, with a similar strength and correlated on a scale of a few 10$\,$pc.
• We investigate the impact of the turbulent magnetic field on the ALP-photon conversions, characterizing the effects numerically and analytically.