2011/08/16 by H. Tam, Tam, H., Q. Yang +2
Physics and Astronomy · #Astrophysics and Cosmic Phenomena #Dark Matter and Cosmic Phenomena #FOS: Physical sciences #High Energy Astrophysical Phenomena (astro-ph.HE) #High Energy Physics - Phenomenology (hep-ph) #Neutrino Physics Research #astro-ph.HE #hep-ph
paper · pdf · doi:10.48550/arxiv.1108.3362
8 pages, 6 figures
arxiv created 2011/08/16 · openalex publication_date 2011/08/16 · arxiv updated 2011/08/18 · openalex created_date 2025/10/10 · openalex updated_date 2026/07/28
Cosmic ray protons propagating in a spatially-homogeneous but time-dependent field of axions or axion-like particles (ALPs) emit photons in a way that is reminiscent of Cherenkov radiation by charged particles in a preferred background. We compute the emission rate and energy spectrum of the photons, and discuss the possibility of their detection using the Square Kilometre Array which is currently under construction. In the case of a non-detection, constraints can be placed on the parameter space of ALPs whose mass lie between 10-7eV and 10-5 eV under the assumption that they are the primary constituent of dark matter.