Search with EGRET for a Gamma Ray Line from the Galactic Center

Abstract

We search data from the Energetic Gamma Ray Experiment Telescope (EGRET) for a gamma-ray line in the energy range 0.1-10 GeV from the 10 X 10 degree region around the Galactic center. Our null results lead to upper limits to the line flux from the Galactic center. Such lines may have appeared if the dark matter in the Galactic halo is composed of weakly-interacting massive particles (WIMPs) in the mass range 0.1-10 GeV. For a given dark-matter-halo model, our null search translates to upper limits to the WIMP two-photon annihilation cross section as a function of WIMP mass. We show that for a toy model in which Majorana WIMPs in this mass range annihilate only to electron-positron pairs, these upper limits supersede those derived from measurements of the 511-keV line and continuum photons from internal bremsstrahlung at the Galactic center.

arXiv commentAccepted for publication in PRD; 8 pages; 9 figures; 3 tables; text changed to clarify several points; conclusions unchanged

References in corpus (19)

• The Structure of Cold Dark Matter Halos
• Particle Dark Matter: Evidence, Candidates and Constraints
• Supersymmetric Dark Matter
• Non-Baryonic Dark Matter - Observational Evidence and Detection Methods
• Scalar Dark Matter candidates
• Observability of Gamma Rays from Dark Matter Neutralino Annihilations in the Milky Way Halo
• MeV Dark Matter: Has It Been Detected?
• The Cores of Dark Matter Dominated Galaxies: theory vs. observations
• Early SPI/INTEGRAL measurements of galactic 511 keV line emission from positron annihilation
• Stringent Constraint on Galactic Positron Production
• Gamma-Ray Constraint on Galactic Positron Production by MeV Dark Matter
• Light Neutralino Dark Matter in the NMSSM
• Early SPI/INTEGRAL contraints on the morphology of the 511 keV line emission in the 4th galactic quadrant
• Light spin-1/2 or spin-0 Dark Matter particles
• Phase-Resolved Studies of the High-Energy Gamma-Ray Emission from the Crab, Geminga, and Vela Pulsars
• Continuum gamma-ray emission from light dark matter positrons and electrons
• Indirect signals from light neutralinos in supersymmetric models without gaugino mass unification
• Indirect detection of light neutralino dark matter in the NMSSM
• Light Dark Matter Annihilations into Two Photons

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