Search for a Dark Matter Annihilation Signal from the Galactic Center Halo with HESS
2011 (English)In: Physical Review Letters, ISSN 0031-9007, Vol. 106, no 16, 161301- p.Article in journal (Refereed) Published
A search for a very-high-energy (VHE; >= 100 GeV) gamma-ray signal from self-annihilating particle dark matter (DM) is performed towards a region of projected distance r similar to 45-150 pc from the Galactic center. The background-subtracted gamma-ray spectrum measured with the High Energy Stereoscopic System (H.E.S.S.) gamma-ray instrument in the energy range between 300 GeV and 30 TeV shows no hint of a residual gamma-ray flux. Assuming conventional Navarro-Frenk-White and Einasto density profiles, limits are derived on the velocity-weighted annihilation cross section <sigma nu > as a function of the DM particle mass. These are among the best reported so far for this energy range and in particular differ only little between the chosen density profile parametrizations. In particular, for the DM particle mass of similar to 1 TeV, values for <sigma nu > above 3 x 10(-25) cm(3) s(-1) are excluded for the Einasto density profile.
Place, publisher, year, edition, pages
2011. Vol. 106, no 16, 161301- p.
IdentifiersURN: urn:nbn:se:su:diva-68846DOI: 10.1103/PhysRevLett.106.161301ISI: 000290095300004OAI: oai:DiVA.org:su-68846DiVA: diva2:473740
authorCount :1942012-01-072012-01-072012-01-07Bibliographically approved