Possibility of a Dark Matter Interpretation for the Excess in Isotropic Radio Emission Reported by ARCADE

2011/08/31 by N. Fornengo, R. A. Lineros, R. Lineros +4 · 3 citations
Physics and Astronomy · #Annihilation #Astronomy #Astrophysics #Astrophysics and Cosmic Phenomena #Cosmology #Dark Matter and Cosmic Phenomena #Dark energy #Dark matter #Galaxies: Formation, Evolution, Phenomena #Isotropy #Light dark matter #Nuclear physics #Optics #Particle physics #Physics #Population #Scalar field dark matter #Synchrotron radiation #WIMP #Weakly interacting massive particles #astro-ph.CO #hep-ph

paper · pdf · doi:10.1103/physrevlett.107.271302

published as Phys.Rev.Lett. 107 (2011) 271302 · 5 pages, 3 figures. v2: one benchmark model added, comments and references expanded, to appear in PRL

arxiv created 2011/12/08 · openalex publication_date 2011/12/29 · arxiv updated 2012/01/10 · openalex created_date 2025/10/10 · openalex updated_date 2026/08/05

Abstract

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.

Citations

• On the DAMA and CoGeNT modulations
• Constraining pre-big-bang nucleosynthesis expansion using cosmic antiprotons
• Full calculation of clumpiness boost factors for antimatter cosmic rays in the light of ΛCDM N-body simulation results
• The Contribution of the Unresolved Extragalactic Radio Sources to the Brightness Temperature of the Sky
• Dark matter signatures in the anisotropic radio sky
• First results from DAMA/LIBRA and the combined results with DAMA/NaI

Cited by

• Note on the dark matter explanation of the ARCADE excess and AMS data
• Novel techniques for decomposing diffuse backgrounds
• Galactic Center radio constraints on gamma-ray lines from dark matter annihilation

Related

• Radio signals of particle dark matter
• Radio observations of the Galactic Centre and the Coma cluster as a probe of light dark matter self-annihilations and decay
• Dark matter signatures in the anisotropic radio sky
• Possible evidence for dark matter annihilations from the excess microwave emission around the center of the Galaxy seen by the Wilkinson Microwave Anisotropy Probe
• Antiproton and Radio Constraints on the Dark Matter Interpretation of the Fermi Gamma Ray Observations of the Galactic Center