Cosmological Radio Emission induced by WIMP Dark Matter

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.

19 pages, 26 figures. v2: comments and references added, to appear in JCAP

References in corpus (18)

• Observation of an anomalous positron abundance in the cosmic radiation
• Gamma-ray and radio tests of the e+e- excess from DM annihilations
• Extended Anomalous Foreground Emission in the WMAP 3-Year Data
• Evidence Of Dark Matter Annihilations In The WMAP Haze
• The VLA Survey of the Chandra Deep Field South. V. Evolution and Luminosity Functions of sub-mJy radio sources and the issue of radio emission in radio-quiet AGN
• Multi-wavelength signals of dark matter annihilations at the Galactic center
• Dark matter annihilation or unresolved astrophysical sources? Anisotropy probe of the origin of cosmic gamma-ray background
• A dark matter interpretation for the ARCADE excess?
• Extragalactic Inverse Compton Light from Dark Matter Annihilation and the Pamela Positron Excess
• Anisotropy probe of galactic and extra-galactic Dark Matter annihilations
• Radio constraints on dark matter annihilation in the galactic halo and its substructures
• The impact of Galactic synchrotron emission on CMB anisotropy measurements. I. Angular power spectrum analysis of total intensity all-sky surveys
• Galactic synchrotron emission from WIMPs at radio frequencies
• Interpretation of the Extragalactic Radio Background
• Multi-wavelength Searches for Particle Dark Matter
• Can the morphology of gamma-ray emission distinguish annihilating from decaying dark matter?
• Can the WMAP Haze really be a signature of annihilating neutralino dark matter?
• Radio observations of the Galactic Centre and the Coma cluster as a probe of light dark matter self-annihilations and decay

Cited by in corpus (23)

• Fundamental Physics with the Square Kilometre Array
• Dark Forces and Light Dark Matter
• Constraints on dark matter annihilation from CMB observations before Planck
• Particle dark matter searches in the anisotropic sky
• The EMU view of the Large Magellanic Cloud: Troubles for sub-TeV WIMPs
• Dark matter searches with cosmic antideuterons: status and perspectives
• Isotropic Radio Background from Quark Nugget Dark Matter
• The Isotropic Radio Background and Annihilating Dark Matter
• Galactic Center Radio Constraints on Gamma-Ray Lines from Dark Matter Annihilation
• The isotropic radio background revisited
• Evolution of Dark Matter Halos and their Radio Emissions
• Contributions of dark matter annihilation to the global 21cm spectrum observed by the EDGES experiment
• Cluster Mergers and the Origin of the ARCADE-2 Excess
• Radio constraints on dark matter annihilation in Canes Venatici I with LOFAR
• The contribution of ultracompact dark matter minihalos to the isotropic radio background
• Updated galactic radio constraints on Dark Matter
• The Anisotropy of the Extragalactic Radio Background from Dark Matter Annihilation
• Cosmological origin of anomalous radio background
• Indirect Detection of Dark Matter in the Galaxy
• Testing the dark matter origin of the WMAP-Planck Haze with radio observations of Spiral Galaxies
• The Excess Radio Background and Fast Radio Transients
• Note on the dark matter explanation of the ARCADE excess and AMS data
• Signatures of Dark Matter in Cosmic-Ray Observations