The gamma-ray and neutrino sky: a consistent picture of Fermi-LAT, H.E.S.S., Milagro, and IceCube results

In this Letter we propose a novel interpretation of the anomalous TeV gamma-ray diffuse emission observed by Milagro in the inner Galactic plane consistent with the signal reported by H.E.S.S. in the Galactic ridge; remarkably, our picture also accounts for a relevant portion of the neutrino flux measured by IceCube. Our scenario is based on a recently proposed phenomenological model characterized by radially-dependent cosmic-ray (CR) transport properties. Designed to reproduce both Fermi-LAT gamma-ray data and local CR observables, this model offers for the first time a self-consistent picture of both the GeV and the TeV sky.