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arXiv · 2510.20687

Search for neutrino emission from LHAASO observed Microquasar with IceCube 10-year data

Rong-Lan Li·Hao-Ning He·Da-Ming Wei
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Abstract

The Large High Altitude Air Shower Observatory (LHAASO) has detected ultra-high-energy (UHE; E>100 TeV) gamma-ray emission from five microquasars, suggesting their potential as Galactic PeV cosmic-ray accelerators. At these energies, the Klein-Nishima effect strongly suppresses leptonic processes, making neutrinos observation a crucial test for hadronic acceleration. We present a search for neutrino emission from these LHAASO-identified Microquasars using ten years of IceCube muon-track data. No significant neutrino signal was found in either single-source or stacking analyses. Our stacking result further shows that the studied microquasars population can only account for a small fraction of the diffuse neutrino flux along the Galactic Plane. Finally, we demonstrate that new-generation neutrino telescopes, such as HUN, will have the sensitivity to probe harmonic emission from these candidate PeVatrons.

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Rong-Lan Li, Hao-Ning He, Da-Ming Wei. 2025-10-23. Search for neutrino emission from LHAASO observed Microquasar with IceCube 10-year data. https://arxiv.org/abs/2510.20687

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