PeV neutrinos from interactions of cosmic rays with the interstellar medium in the Galaxy
Abstract
We present a self-consistent interpretation of the very high-energy neutrino signal from the direction of the inner Galaxy, which is a part of the astronomical neutrino signal 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 γ-ray emission from the galactic ridge, as observed by the Fermi telescope. This suggests that IceCube neutrino and Fermi/LAT γ-ray fluxes are both produced in interactions of cosmic rays with the interstellar medium in the Norma arm and/or in the galactic bar. Cosmic rays responsible for the (γ ray) and neutrino flux are characterized by a hard spectrum with the slope harder than -2.4 and cutoff energy higher than 10 PeV.
- Publication:
-
Physical Review D
- Pub Date:
- May 2014
- DOI:
- 10.1103/PhysRevD.89.103002
- arXiv:
- arXiv:1307.2158
- Bibcode:
- 2014PhRvD..89j3002N
- Keywords:
-
- 95.85.Ry;
- 95.85.Pw;
- 98.35.Hj;
- 98.70.Sa;
- Neutrino muon pion and other elementary particles;
- cosmic rays;
- gamma-ray;
- Spiral arms and galactic disk;
- Cosmic rays;
- Astrophysics - High Energy Astrophysical Phenomena;
- Astrophysics - Astrophysics of Galaxies;
- High Energy Physics - Phenomenology
- E-Print:
- 6pages, 4 figures