Neutrinos from Extra-Large Hadron Collider in the Milky Way

Understand

Neutrino telescope IceCube has recently discovered astrophysical neutrinos with energies in the TeV-PeV range.

• We use the data of Fermi gamma-ray telescope to demonstrate that the neutrino signal has significant contribution from the Milky Way galaxy.
• Matching the gamma-ray and neutrino spectra we find that TeV-PeV Galactic cosmic rays form a powerlaw spectrum with the slope p~2.45.
• This spectral slope is consistent with the average cosmic ray spectrum in the disks of the Milky Way and Large Magellanic Cloud galaxies.