12-20 July 2017
BEXCO
Asia/Seoul timezone
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Contribution

BEXCO - Room D(109/110)

[NU132] Constraints on the high energy neutrino flux from the Galactic Plane

Speakers

  • Bruny BARET

Primary authors

Co-authors

Description

The measurements of astrophysical neutrinos by the IceCube collaboration are consistent with an isotropic flux but also contain some indications of a North/South asymmetry which could hint a Galactic contribution. The ANTARES neutrino telescope has a direct view of the Galactic Center region and can provide complementary information on the neutrino flux from this region thanks to its excellent angular resolution both for tracks and showers. A recent model of cosmic ray transport in the Galactic Plane, so called "Gamma model", is characterized by radially-dependent cosmic ray transport properties. It is designed to reproduce Fermi-LAT γ-ray data, and is consistent with MILAGRO and HESS measurements of the Galactic Ridge. The neutrino flux from the Galactic Center predicted by this model is about five times larger than the flux computed with previous models, and it is close to the ANTARES sensitivity. Using the Gamma model as a reference, we searched for a possible Galactic contribution to the astrophysical neutrino flux using nine years of data from the ANTARES neutrino telescope. Interactions of all neutrino flavors yielding tracks or cascades are used. No excess of events is observed and an upper limit is set on the neutrino flux of 1.35 times the prediction of the Gamma model.