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000643472 0247_ $$2arXiv$$aarXiv:2409.04165
000643472 0247_ $$2datacite_doi$$a10.3204/PUBDB-2026-00219
000643472 037__ $$aPUBDB-2026-00219
000643472 041__ $$aEnglish
000643472 082__ $$a520
000643472 088__ $$2arXiv$$aarXiv:2409.04165
000643472 1001_ $$0P:(DE-HGF)0$$aOmeliukh, A.$$b0$$eCorresponding author
000643472 245__ $$aMulti-epoch leptohadronic modeling of neutrino source candidate blazar PKS 0735+178
000643472 260__ $$c2025
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000643472 500__ $$aA&A 695, A266 (2025). Accepted for publication in A&A
000643472 520__ $$aContext. The origin of the astrophysical neutrino flux discovered by IceCube remains largely unknown. Several individual neutrino source candidates were observed. Among them is the gamma-ray flaring blazar TXS 0506+056. A similar coincidence of a high-energy neutrino and a gamma-ray flare was found in blazar PKS 0735+178.Aims. By modeling the spectral energy distributions of PKS 0735+178, we aimed to explore the physical conditions that lead to neutrino production at different stages of the source's activity.Methods. We analyzed the multiwavelength data from the selected time periods. Using numerical simulations of radiation processes in the source, we explored the parameter space of one-zone leptonic and leptohadronic models to find the best-fit solutions that explain the observed photon fluxes.Results. We demonstrated how model parameter degeneracy affected the prediction of neutrino spectra. We showed that the available multiwavelength data were insufficient to predict the neutrino spectrum unambiguously. However, under the condition of neutrino rates maximization, we proposed a scenario in which 0.1 neutrino events were produced during the 50-day flare.Key words: neutrinos / radiation mechanisms: non-thermal / methods: numerical / BL Lacertae objects: individual: PKS 0735+178
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000643472 7001_ $$aGarrappa, S.$$b1
000643472 7001_ $$aFallah Ramazani, V.$$b2
000643472 7001_ $$0P:(DE-H253)PIP1006092$$aFranckowiak, A.$$b3
000643472 7001_ $$0P:(DE-H253)PIP1021242$$aWinter, W.$$b4
000643472 7001_ $$aLindfors, E.$$b5
000643472 7001_ $$aNilsson, K.$$b6
000643472 7001_ $$aJormanainen, J.$$b7
000643472 7001_ $$00000-0002-8657-0076$$aWierda, F.$$b8
000643472 7001_ $$00000-0003-3460-0103$$aFilippenko, A. V.$$b9
000643472 7001_ $$aZheng, W.$$b10
000643472 7001_ $$00000-0003-1249-6026$$aTornikoski, M.$$b11
000643472 7001_ $$aLähteenmäki, A.$$b12
000643472 7001_ $$aKankkunen, S.$$b13
000643472 7001_ $$00000-0002-9164-2695$$aTammi, J.$$b14
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000643472 9141_ $$y2025
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