Search for Neutrinos from the Galactic 4FGL Sources with the Pion-bump Signature with IceCube
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| Format: | Preprint |
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2025
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| _version_ | 1866913967191883776 |
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| author | Granados, Alejandra Babu, Rishi Nisa, Mehr Un |
| author_facet | Granados, Alejandra Babu, Rishi Nisa, Mehr Un |
| contents | The IceCube Neutrino Observatory, located at the South Pole, covers a cubic kilometer of Antarctic ice, and is designed to detect astrophysical neutrinos in the TeV-PeV energy range. While IceCube has recently identified a diffuse flux of neutrinos originating from the Galactic Plane, specific sources of astrophysical neutrinos within the Milky Way remain elusive. Hadronic gamma-rays, produced through the decay of neutral pions, are expected to display a characteristic "pion bump" or "spectral break" around 200 MeV. Recent studies by the Fermi-LAT Collaboration highlight 56 sources from the 4FGL Catalog exhibiting a spectral break in the MeV energy range. Detecting astrophysical neutrinos from these sources would provide compelling evidence for cosmic-ray acceleration in their vicinity. In this analysis, we search for astrophysical neutrino emission from 56 sources showing characteristics of a pion bump using 13 years of IceCube data. Our findings could enhance our understanding of potential cosmic-ray acceleration sites in the galaxy. |
| format | Preprint |
| id |
arxiv_https___arxiv_org_abs_2507_23040 |
| institution | arXiv |
| publishDate | 2025 |
| record_format | arxiv |
| spellingShingle | Search for Neutrinos from the Galactic 4FGL Sources with the Pion-bump Signature with IceCube Granados, Alejandra Babu, Rishi Nisa, Mehr Un High Energy Astrophysical Phenomena The IceCube Neutrino Observatory, located at the South Pole, covers a cubic kilometer of Antarctic ice, and is designed to detect astrophysical neutrinos in the TeV-PeV energy range. While IceCube has recently identified a diffuse flux of neutrinos originating from the Galactic Plane, specific sources of astrophysical neutrinos within the Milky Way remain elusive. Hadronic gamma-rays, produced through the decay of neutral pions, are expected to display a characteristic "pion bump" or "spectral break" around 200 MeV. Recent studies by the Fermi-LAT Collaboration highlight 56 sources from the 4FGL Catalog exhibiting a spectral break in the MeV energy range. Detecting astrophysical neutrinos from these sources would provide compelling evidence for cosmic-ray acceleration in their vicinity. In this analysis, we search for astrophysical neutrino emission from 56 sources showing characteristics of a pion bump using 13 years of IceCube data. Our findings could enhance our understanding of potential cosmic-ray acceleration sites in the galaxy. |
| title | Search for Neutrinos from the Galactic 4FGL Sources with the Pion-bump Signature with IceCube |
| topic | High Energy Astrophysical Phenomena |
| url | https://arxiv.org/abs/2507.23040 |