Search for Neutrinos from the Galactic 4FGL Sources with the Pion-bump Signature with IceCube

Icecube Collaboration

doi:10.22323/1.501.0929

Search for Neutrinos from the Galactic 4FGL Sources with the Pion-bump Signature with IceCube

Icecube Collaboration

Physics and Astronomy

University of Delaware
RWTH Aachen University
Karlsruhe Institute of Technology
Adelaide University
Loyola University Chicago
German Electron Synchrotron
University of Canterbury
University of Wisconsin-Madison
Université libre de Bruxelles
University of Copenhagen
TU Dortmund University
University of Kansas
Marquette University
Harvard University
University of Utah
Michigan State University
South Dakota School of Mines & Technology
University of California at Irvine
Technical University of Munich
University of California at Berkeley
Ohio State University
Ruhr University Bochum
Uppsala University
University of Rochester
University of Maryland, College Park
University of Padua
University of Alabama
Johannes Gutenberg University Mainz
Georgia Institute of Technology
Queen's University Kingston

Research output: Contribution to journal › Conference article › peer-review

Abstract

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.

Original language	English
Article number	929
Journal	Proceedings of Science
Volume	501
DOIs	https://doi.org/10.22323/1.501.0929
State	Published - Dec 30 2025
Event	39th International Cosmic Ray Conference, ICRC 2025 - Geneva, Switzerland Duration: Jul 15 2025 → Jul 24 2025

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10.22323/1.501.0929

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@article{39a3d6be301e48148c75126aa45d9ea3,

title = "Search for Neutrinos from the Galactic 4FGL Sources with the Pion-bump Signature with IceCube",

abstract = "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.",

author = "\{Icecube Collaboration\} and Schroeder, \{Frank G.\} and Federico Bontempo and R. Abbasi and M. Ackermann and J. Adams and Agarwalla, \{S. K.\} and Aguilar, \{J. A.\} and M. Ahlers and Alameddine, \{J. M.\} and S. Ali and Amin, \{N. M.\} and K. Andeen and C. Arg{\"u}elles and Y. Ashida and S. Athanasiadou and Axani, \{S. N.\} and R. Babu and X. Bai and J. Baines-Holmes and A. Balagopal and Barwick, \{S. W.\} and S. Bash and V. Basu and R. Bay and Beatty, \{J. J.\} and Tjus, \{J. Becker\} and P. Behrens and J. Beise and C. Bellenghi and B. Benkel and S. BenZvi and D. Berley and E. Bernardini and Besson, \{D. Z.\} and E. Blaufuss and L. Bloom and S. Blot and I. Bodo and F. Bontempo and Motzkin, \{J. Y.Book\} and Meneguolo, \{C. Boscolo\} and S. B{\"o}ser and O. Botner and J. B{\"o}ttcher and J. Braun and B. Brinson and Z. Brisson-Tsavoussis and Burley, \{R. T.\} and D. Butterfield and J. Kiryluk",

note = "Publisher Copyright: {\textcopyright} Copyright owned by the author(s); 39th International Cosmic Ray Conference, ICRC 2025 ; Conference date: 15-07-2025 Through 24-07-2025",

year = "2025",

month = dec,

day = "30",

doi = "10.22323/1.501.0929",

language = "English",

volume = "501",

journal = "Proceedings of Science",

issn = "1824-8039",

}

TY - JOUR

T1 - Search for Neutrinos from the Galactic 4FGL Sources with the Pion-bump Signature with IceCube

AU - Icecube Collaboration

AU - Schroeder, Frank G.

AU - Bontempo, Federico

AU - Abbasi, R.

AU - Ackermann, M.

AU - Adams, J.

AU - Agarwalla, S. K.

AU - Aguilar, J. A.

AU - Ahlers, M.

AU - Alameddine, J. M.

AU - Ali, S.

AU - Amin, N. M.

AU - Andeen, K.

AU - Argüelles, C.

AU - Ashida, Y.

AU - Athanasiadou, S.

AU - Axani, S. N.

AU - Babu, R.

AU - Bai, X.

AU - Baines-Holmes, J.

AU - Balagopal, A.

AU - Barwick, S. W.

AU - Bash, S.

AU - Basu, V.

AU - Bay, R.

AU - Beatty, J. J.

AU - Tjus, J. Becker

AU - Behrens, P.

AU - Beise, J.

AU - Bellenghi, C.

AU - Benkel, B.

AU - BenZvi, S.

AU - Berley, D.

AU - Bernardini, E.

AU - Besson, D. Z.

AU - Blaufuss, E.

AU - Bloom, L.

AU - Blot, S.

AU - Bodo, I.

AU - Bontempo, F.

AU - Motzkin, J. Y.Book

AU - Meneguolo, C. Boscolo

AU - Böser, S.

AU - Botner, O.

AU - Böttcher, J.

AU - Braun, J.

AU - Brinson, B.

AU - Brisson-Tsavoussis, Z.

AU - Burley, R. T.

AU - Butterfield, D.

AU - Kiryluk, J.

PY - 2025/12/30

Y1 - 2025/12/30

N2 - 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.

AB - 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.

UR - https://www.scopus.com/pages/publications/105029010304

U2 - 10.22323/1.501.0929

DO - 10.22323/1.501.0929

M3 - Conference article

AN - SCOPUS:105029010304

SN - 1824-8039

VL - 501

JO - Proceedings of Science

JF - Proceedings of Science

M1 - 929

T2 - 39th International Cosmic Ray Conference, ICRC 2025

Y2 - 15 July 2025 through 24 July 2025

ER -

Search for Neutrinos from the Galactic 4FGL Sources with the Pion-bump Signature with IceCube

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