Search for Potential Hadronic Sources in the Galactic Plane from the 4FGL Catalog using the IceCube Neutrino Observatory

The IceCube Neutrino Observatory, located at the South Pole, is a detector that covers a cubic kilometer of Antarctic ice, and is sensitive to astrophysical neutrinos in the TeV-PeV range. Recently, IceCube has observed a diffuse flux of neutrinos from the Galactic Plane, but hasn't yet identified any specific sources of astrophysical neutrinos in the Milky Way. The spectra of hadronic gamma rays, created by the decay of neutral pions, exhibit a distinctive 'pion bump' or 'spectral break' around 200 MeV. The Fermi-LAT Collaboration's 4FGL catalog lists 56 sources that show signs of this spectral break. Detecting astrophysical neutrinos from these sources would further confirm cosmic-ray acceleration near them. In this study, we present the results of our analysis of 56 sources showing pion bump signatures, using 13 years of IceCube data to search for astrophysical neutrinos. Our findings could enhance our understanding of potential cosmic-ray acceleration sites in the galaxy.