TY  - JOUR
AU  - Fornengo, N.
AU  - Lineros, R. A.
AU  - Regis, M.
AU  - Taoso, M.
PY  - 2012
DA  - 2012//
TI  - Cosmological radio emission induced by WIMP Dark Matter
T2  - J. Cosmol. Astropart. Phys.
JO  - Journal of Cosmology and Astroparticle Physics
SP  - 033
EP  - 27pp
VL  - 03
IS  - 3
PB  - Iop Publishing Ltd
KW  - dark matter theory
KW  - power spectrum
AB  - 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.
SN  - 1475-7516
UR  - http://arxiv.org/abs/1112.4517
UR  - https://doi.org/10.1088/1475-7516/2012/03/033
DO  - 10.1088/1475-7516/2012/03/033
LA  - English
N1  - WOS:000302949600033
ID  - Fornengo_etal2012
ER  -