Karlsruhe 2011 – wissenschaftliches Programm
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T: Fachverband Teilchenphysik
T 22: Astroteilchenphysik und Kosmologie (Theorie)
T 22.4: Vortrag
Mittwoch, 30. März 2011, 17:30–17:45, 30.23: 3-1
Fermi-LAT gamma rays and dark matter indirect detection — •Francesca Calore1, Fiorenza Donato2, Torsten Bringmann1, and Valentina De Romeri3 — 1II. Institute for Theoretical Physics, University of Hamburg, Luruper Chausse 149, D-22761 Hamburg, Germany — 2Dept. of Theoretical Physics and INFN, via Giuria 1, 10125 Torino, Italy — 3IFIC edificio institutos de investigacion Paterna Valenciatigación. Paterna. Valencia. E-46071 (ESPAÑA)
Focusing on DM indirect detection through gamma-rays, we provide upper limits on the galactic annihilation flux, by means of the measured isotropic diffuse gamma-ray emission at high latitudes, coming from the first year observations of the Fermi-LAT telescope.
We study the sensitivity of the DM signal to the astrophysical known background (galactic and extragalactic), starting from modeling the underlying galactic diffuse emission and we extend previous analysis estimating a residual extragalactic background (EGB) intensity. Finally, we set updated upper bounds on the DM annihilation cross section, which improve by roughly an order of magnitude the constraints arising from the EGB derived by the Fermi-LAT Collaboration.