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- W4226458052 abstract "The Large High Altitude Air Shower Observatory (LHAASO) observed a dozen of gamma-ray sources with significant emission above 100 TeV, which may be strong candidates of PeVatrons. Neutrino observations are crucial to diagnose whether the gamma-ray radiative process is hadronic or leptonic. We use the Bayesian method to analyze the ten-year (2008-2018) IceCube data, and hence constrain the hadronic gamma-ray emission in the LHAASO sources. The present neutrino data show that the hadronic gamma-ray flux from Crab Nebula is lower than the observed gamma-ray flux at the 90% C.L. and contributes less than 86%, which disfavors the hadronic origin of the gamma-rays below tens of TeV. For the other LHAASO sources, the present neutrino observations cannot put useful constraints on the gamma-ray radiative process. We consider the uncertainty of the source extension: the upper limits on hadronic gamma-ray flux tend to increase with the extension; and some sources, i.e., LHAASO J2032+4102, LHAASO J1929+1745, and LHAASO J1908+0621, show relatively high statistical significance of neutrino signals if the extension is <0.6 deg. We finally estimate the future observational results of LHAASO sources by the proposed neutrino telescopes. If the LHAASO-observed PeV gamma-rays are of hadronic origin, Crab Nebula may be detected at >100 TeV at 3-sigma C.L. within 20 years by a neutrino detector with the effective area 30 times that of IceCube." @default.
- W4226458052 created "2022-05-05" @default.
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- W4226458052 date "2021-12-28" @default.
- W4226458052 modified "2023-09-30" @default.
- W4226458052 title "Neutrino Observations of LHAASO Sources: Present Constraints and Future Prospects" @default.
- W4226458052 doi "https://doi.org/10.1093/mnras/stac1350" @default.
- W4226458052 hasPublicationYear "2021" @default.
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