THE GAMMA-RAY AND NEUTRINO SKY: A CONSISTENT PICTURE OF FERMI-LAT, MILAGRO, AND ICECUBE RESULTS

Journal Article · Sun Dec 20 04:00:00 EST 2015 · Astrophysical Journal Letters

DOI:https://doi.org/10.1088/2041-8205/815/2/L25· OSTI ID:22518653

Gaggero, Daniele; Urbano, Alfredo; Valli, Mauro ^[1]; Grasso, Dario; Marinelli, Antonio ^[2]

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1. SISSA and INFN, via Bonomea 265, I-34136 Trieste (Italy)
2. INFN and Dipartimento di Fisica “E. Fermi,” Pisa University, Largo B. Pontecorvo 3, I-56127 Pisa (Italy)

We compute the γ-ray and neutrino diffuse emission of the Galaxy on the basis of a recently proposed phenomenological model characterized by radially dependent cosmic-ray (CR) transport properties. We show how this model, designed to reproduce both Fermi-LAT γ-ray data and local CR observables, naturally reproduces the anomalous TeV diffuse emission observed by Milagro in the inner Galactic plane. Above 100 TeV our picture predicts a neutrino flux that is about five (two) times larger than the neutrino flux computed with conventional models in the Galactic Center region (full-sky). Explaining in that way up to ∼25% of the flux measured by IceCube, we reproduce the full-sky IceCube spectrum adding an extra-Galactic component derived from the muonic neutrinos flux in the northern hemisphere. We also present precise predictions for the Galactic plane region where the flux is dominated by the Galactic emission.

• OSTI ID: 22518653
• Journal Information: Astrophysical Journal Letters, Journal Name: Astrophysical Journal Letters Journal Issue: 2 Vol. 815; ISSN 2041-8205
• Country of Publication: United States
• Language: English

Related Subjects

79 ASTRONOMY AND ASTROPHYSICS
COSMIC NEUTRINOS
COSMIC RAY PROPAGATION
GAMMA RADIATION
MILKY WAY
MUON NEUTRINOS
NORTHERN HEMISPHERE
SKY
TEV RANGE