Search for Photon-Linelike Signatures from Dark Matter Annihilations with H.E.S.S.

作者: A. Abramowski , F. Acero , F. Aharonian , A. G. Akhperjanian , G. Anton

DOI: 10.1103/PHYSREVLETT.110.041301

关键词:

摘要: Gamma-ray line signatures can be expected in the very-high-energy (VHE; E_\gamma > 100 GeV) domain due to self-annihilation or decay of dark matter (DM) particles space. Such a signal would readily distinguishable from astrophysical \gamma-ray sources that most cases produce continuous spectra which span over several orders magnitude energy. Using data collected with H.E.S.S. instrument, upper limits on line-like emission are obtained energy range between ~500 GeV and ~25 TeV for central part Milky Way halo extragalactic observations, complementing recent Fermi-LAT instrument at lower energies. No statistically significant could found. For monochromatic emission, flux (2x10^-7 - 2x10^-5) m^-2 s^-1 sr^-1 (1x10^-8 2x10^-6) respectively. DM particle mass 1 TeV, velocity-averaged annihilation cross section (\chi\chi -> \gamma\gamma) reach ~10^-27 cm^3 s^-1, based Einasto parametrization Galactic density profile.

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