PT Journal
AU Fornengo, N
   Lineros, RA
   Regis, M
   Taoso, M
TI Possibility of a Dark Matter Interpretation for the Excess in Isotropic Radio Emission Reported by ARCADE
SO Physical Review Letters
JI Phys. Rev. Lett.
PY 2011
BP 271302
EP 5pp
VL 107
IS 27
DI 10.1103/PhysRevLett.107.271302
LA English
AB The ARCADE 2 Collaboration has recently measured an isotropic radio emission which is significantly brighter than the expected contributions from known extra-galactic sources. The simplest explanation of such excess involves a "new'' population of unresolved sources which become the most numerous at very low (observationally unreached) brightness. We investigate this scenario in terms of synchrotron radiation induced by weakly interacting massive particle (WIMP) annihilations or decays in extra-galactic halos. Intriguingly, for light-mass WIMPs with a thermal annihilation cross section, the level of expected radio emission matches the ARCADE observations.
ER