Detecting the Stimulated Decay of Axions at Radio Frequencies

Autor:	Caputo, A., Regis, M., Taoso, M., Witte, S. J.
Rok vydání:	2018
Předmět:	High Energy Physics - Phenomenology Astrophysics - Astrophysics of Galaxies
Zdroj:	JCAP 03 (2019) 027
Druh dokumentu:	Working Paper
DOI:	10.1088/1475-7516/2019/03/027
Popis:	Assuming axion-like particles account for the entirety of the dark matter in the Universe, we study the possibility of detecting their decay into photons at radio frequencies. We discuss different astrophysical targets, such as dwarf spheroidal galaxies, the Galactic Center and halo, and galaxy clusters. The presence of an ambient radiation field leads to a stimulated enhancement of the decay rate; depending on the environment and the mass of the axion, the effect of stimulated emission may amplify the photon flux by serval orders of magnitude. For axion-photon couplings allowed by astrophysical and laboratory constraints(and possibly favored by stellar cooling), we find the signal to be within the reach of next-generation radio telescopes such as the Square Kilometer Array. Comment: Minor changes, references added, matches published version
Databáze:	arXiv
Externí odkaz:	http://arxiv.org/abs/1811.08436 Zobrazit plný text záznamu View this record from Arxiv