Cosmological radio emission induced by WIMP Dark Matter

Fornengo, N.; Lineros, R.; Regis, M.; Taoso, M.

Abstract

We present a detailed analysis of the radio synchrotron emission induced by WIMP dark matter annihilations and decays in extragalactic halos. We compute intensity, angular correlation, and source counts and discuss the impact on the expected signals of dark matter clustering, as well as of other astrophysical uncertainties as magnetic fields and spatial diffusion. Bounds on dark matter microscopic properties are then derived, and, depending on the specific set of assumptions, they are competitive with constraints from other indirect dark matter searches. At GHz frequencies, dark matter sources can become a significant fraction of the total number of sources with brightness below the microJansky level. We show that, at this level of fluxes (which are within the reach of the next-generation radio surveys), properties of the faint edge of differential source counts, as well as angular correlation data, can become an important probe for WIMPs.

Más información

Título según WOS: ID WOS:000302949600033 Not found in local WOS DB
Título de la Revista: JOURNAL OF COSMOLOGY AND ASTROPARTICLE PHYSICS
Número: 3
Editorial: IOP PUBLISHING LTD
Fecha de publicación: 2012
DOI:

10.1088/1475-7516/2012/03/033

Notas: ISI