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Insights from LHAASO and IceCube into the origin of the Galactic diffuse TeV--PeV emission

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arxiv 2307.12363 v2 pith:AB6HYLQN submitted 2023-07-23 astro-ph.HE

Kai Yan , Ruo-Yu Liu , Rui Zhang , Chao-Ming Li , Qiang Yuan , Xiang-Yu Wang This is my paper · ORCID
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keywords diffuseemissiongalacticgamma-rayaccountcontributionemissionsfield
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The high-energy diffuse gamma-ray emission and neutrino emission are expected from the Galactic plane, generated by hadronuclear interactions between cosmic rays (CR) and interstellar medium (ISM). Therefore, measurements of these diffuse emissions will provide important clues on the origin and nature of Galactic CRs. Comparing the latest observations of LHAASO and IceCube on the diffuse Galactic gamma-ray and neutrino emissions respectively, we suggest that the diffuse gamma-ray emission at multi-TeV energies contains a considerable contribution of a leptonic component. By modelling the gamma-ray halos powered by middle-aged pulsars in our Galaxy with taking into account the magnetic field configuration and the interstellar radiation field in the Galaxy, we demonstrate that the collective contribution of pulsar halos can account for the excess in the measured diffuse gamma-ray emission with respect to the predicted flux from CR-ISM interactions. The resulting one-dimensional profile along the Galactic longitude is also consistent with the observation.

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Cited by 2 Pith papers

Reviewed papers in the Pith corpus that reference this work. Sorted by Pith novelty score. Full citation record

  1. Absence of TeV halos around millisecond pulsars

    astro-ph.HE 2025-04 accept novelty 7.0 of 10

    A stacking analysis of 57 millisecond pulsars in HAWC data finds no TeV halo emission, setting upper limits below the inferred efficiency of known TeV halos.

  2. Axion-like Particle Search with a Light-Shining-Through-Walls Setup at a $\gamma$-$\gamma$ Collider

    hep-ph 2025-12 conditional novelty 6.0 of 10

    A light-shining-through-walls search using a gamma-gamma collider's inverse-Compton photon beam could reach g_aγγ ≈ 3.8e-5 GeV^-1 for m_a < 0.1 eV.

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