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Search for joint multimessenger signals from potential Galactic PeVatrons with HAWC and IceCube
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Search for joint multimessenger signals from potential Galactic PeVatrons with HAWC and IceCube

R Alfaro, C Alvarez, J. C Arteaga-Velázquez, D. Avila Rojas, H. A. Ayala Solares, R Babu, E Belmont-Moreno, K. S Caballero-Mora, T Capistrán, A Carramiñana, …
ArXiv.org
06 May 2024
DOI: https://doi.org/10.48550/arxiv.2405.03817
url
https://doi.org/10.48550/arXiv.2405.03817View
Preprint (Author's original) Open arXiv.org - Non-exclusive license to distribute

Abstract

Physics - High Energy Astrophysical Phenomena High Energy Astrophysics
The origin of high-energy galactic cosmic rays is yet to be understood, but some galactic cosmic-ray accelerators can accelerate cosmic rays up to PeV energies. The high-energy cosmic rays are expected to interact with the surrounding material or radiation, resulting in the production of gamma-rays and neutrinos. To optimize for the detection of such associated production of gamma-rays and neutrinos for a given source morphology and spectrum, a multimessenger analysis that combines gamma-rays and neutrinos is required. In this study, we use the Multi-Mission Maximum Likelihood framework with IceCube Maximum Likelihood Analysis software and HAWC Accelerated Likelihood to search for a correlation between 22 known gamma-ray sources from the third HAWC gamma-ray catalog and 14 yr of IceCube track-like data. No significant neutrino emission from the direction of the HAWC sources was found. We report the best-fit gamma-ray model and 90% CL neutrino flux limit from the 22 sources. From the neutrino flux limit, we conclude that, for five of the sources, the gamma-ray emission observed by HAWC cannot be produced purely from hadronic interactions. We report the limit for the fraction of gamma-rays produced by hadronic interactions for these five sources.

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