1307.2158 (A. Neronov et al.)

The Galactic Pevatron    [PDF]

A. Neronov, D. V. Semikoz, C. Tchernin

We present a self-consistent interpretation of the excess of very-high-energy neutrino emission in the direction of the inner Galaxy reported by IceCube. We demonstrate that an estimate of the neutrino flux in the E>100 TeV energy range lies at the high-energy power-law extrapolation of the spectrum of diffuse gamma-ray emission from the Galaxy, measured by Fermi telescope. This proves that IceCube neutrino and Fermi/LAT gamma-ray fluxes are both produced in interactions of cosmic rays with the interstellar medium. Cosmic rays responsible for the gamma-ray and neutrino flux are characterized by hard spectrum with the slope harder than -2.4 and cut-off energy higher than 10 PeV. Morphology of the IceCube excess is consistent with a possibility that multi-PeV cosmic ray source is located at the edge of Norma arm / tip of the Galactic Bar.

View original: http://arxiv.org/abs/1307.2158