Gamma-ray and radio tests of the e+e- excess from DM annihilations

Abstract

PAMELA and ATIC recently reported an excess in e+e- cosmic rays. We show that if it is due to Dark Matter annihilations, the associated gamma-ray flux and the synchrotron emission produced by e+e- in the galactic magnetic field violate HESS and radio observations of the galactic center and HESS observations of dwarf Spheroidals, unless the DM density profile is significantly less steep than the benchmark NFW and Einasto profiles.

16 pages, 4 figures; v2: normalizations fixed in Table 2 and typos corrected (no changes in the analysis nor the results), some references and comments added; v3: minor additions, matches published version

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Cited by in corpus (21)

• Decaying Dark Matter can explain the electron/positron excesses
• Dark matter interpretation of recent electron and positron data
• Inverse Compton constraints on the Dark Matter e+e- excesses
• Constraints on Dark Matter annihilations from reionization and heating of the intergalactic gas
• Bounds on Cross-sections and Lifetimes for Dark Matter Annihilation and Decay into Charged Leptons from Gamma-ray Observations of Dwarf Galaxies
• Reconciliation of CDM abundance and $\mu \to e\gamma$ in a radiative seesaw model
• Dark Matter Signals from Cascade Annihilations
• Positrons and antiprotons from inert doublet model dark matter
• The PAMELA and ATIC Excesses From a Nearby Clump of Neutralino Dark Matter
• Discriminating different scenarios to account for the cosmic $e^{\pm }$ excess by synchrotron and inverse Compton radiation
• Dark matter and pulsar signals for Fermi LAT, PAMELA, ATIC, HESS and WMAP data
• The Leptonic Higgs as a Messenger of Dark Matter
• Phenomenology of Dark Matter annihilation into a long-lived intermediate state
• Substructure Boosts to Dark Matter Annihilation from Sommerfeld Enhancement
• Extended MSSM Neutralinos as the Source of the PAMELA Positron Excess
• Galactic Signatures of Decaying Dark Matter
• PAMELA/ATIC anomaly from the meta-stable extra dark matter component and the leptophilic Yukawa interaction
• Testing the Dark Matter Interpretation of the PAMELA Excess through Measurements of the Galactic Diffuse Emission
• PAMELA/ATIC Anomaly from Exotic Mediated Dark Matter Decay
• Cosmic Ray Positrons from Annihilations into a New, Heavy Lepton
• Diffuse gamma-ray background and cosmic-ray positrons from annihilating dark matter