Inverse Compton constraints on the Dark Matter image excesses Original Research Article

Recent results from experiments like PAMELA have pointed to excesses of image in cosmic rays. If interpreted in terms of Dark Matter annihilations, they imply the existence of an abundant population of image in the galactic halo at large. We consider the high energy gamma ray fluxes produced by Inverse Compton Scattering of interstellar photons on such image, and compare them with the available data from EGRET and some preliminary data from FERMI. We consider different observation regions of the sky and a range of DM masses, annihilation channels and DM profiles. We find that large portions of the parameter space are excluded, in particular for DM masses larger than 1 TeV, for leptonic annihilation channels and for benchmark Einasto or NFW profiles.