6533b837fe1ef96bd12a296f
RESEARCH PRODUCT
Cosmological radio emission induced by WIMP Dark Matter
Nicolao FornengoNicolao FornengoMarco RegisMarco RegisMarco TaosoMarco TaosoRoberto A. Linerossubject
PhysicsBrightnessCosmology and Nongalactic Astrophysics (astro-ph.CO)010308 nuclear & particles physicsAstrophysics::High Energy Astrophysical PhenomenaDark matterFOS: Physical sciencesAstronomy and AstrophysicsAstrophysics::Cosmology and Extragalactic AstrophysicsAstrophysics01 natural sciencesMagnetic fieldSynchrotron emissionHigh Energy Physics - PhenomenologyHigh Energy Physics - Phenomenology (hep-ph)WIMP0103 physical sciencesSource countsHaloSpatial diffusion010303 astronomy & astrophysicsAstrophysics - Cosmology and Nongalactic Astrophysicsdescription
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.
| year | journal | country | edition | language |
|---|---|---|---|---|
| 2011-12-19 | Journal of Cosmology and Astroparticle Physics |