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Description
The IceCube Neutrino Observatory is a neutrino detector located at the South Pole, comprising a cubic-kilometer volume within the Antarctic ice. IceCube has recently observed a diffuse flux of neutrinos from the Galactic Plane. However, no individual point source of astrophysical neutrinos from the Milky Way have been detected yet. Hadronic gamma rays produced through the decay of neutral pions result in a distinctive "pion-bump" or "spectral break" around energies of 200 MeV. A total of 56 sources in the 4FGL catalog by Fermi-LAT Collaboration have shown evidence for this spectral break signature. Detecting astrophysical neutrinos from these sources would provide further evidence of cosmic-ray acceleration in the vicinity of the sources. In this work, we will present a dedicated analysis of the 56 4FGL sources with a pion bump signature to look for astrophysical neutrinos using 13 years of IceCube data. We show that the analysis could advance our knowledge of potentially new acceleration sites and provide a direct probe of CR acceleration in the galaxy.
