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Recently, the IceCube Neutrino Observatory has detected the neutrino eventIceCube-170922A from the radio-emitting tidal disruption event (TDE) namedAT2019dsg, indicating to be one of the most likely sources of high-energycosmic rays. So far, the photo-hadronic interaction is considered in theliterature to interpret neutrino emission from AT2019dsg. Here, we examinewhether the IceCube-170922A along with the broadband electromagnetic emissionfrom the source can also be described by a pure hadronic emission employing theproton blazar inspired (PBI) model, which takes into account thenon-relativistic protons that emerge under the charge neutrality situation ofthe blazar jet and thus offers sufficient target matter for pp interactionswith shock-accelerated protons. Our findings show that the PBI model is able toconsistently describe the IceCube observations on AT2019dsg and the broadbandspectrum of the source without exceeding the observed X-ray and gamma-ray fluxupper limits imposed by the XMM-Newton and Fermi-LAT telescopes.

A pure hadronic model description of the observed neutrino emission from the tidal disruption event AT2019dsg