%0 Journal Article
%A Omeliukh, A.
%A Garrappa, S.
%A Fallah Ramazani, V.
%A Franckowiak, A.
%A Winter, W.
%A Lindfors, E.
%A Nilsson, K.
%A Jormanainen, J.
%A Wierda, F.
%A Filippenko, A. V.
%A Zheng, W.
%A Tornikoski, M.
%A Lähteenmäki, A.
%A Kankkunen, S.
%A Tammi, J.
%T Multi-epoch leptohadronic modeling of neutrino source candidate blazar PKS 0735+178
%J Astronomy and astrophysics
%V 695
%N arXiv:2409.04165
%@ 0004-6361
%C Les Ulis
%I EDP Sciences
%M PUBDB-2025-05687
%M arXiv:2409.04165
%P A266 
%D 2025
%Z A&A 695, A266 (2025). Accepted for publication in A&A
%X 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. By modeling the spectral energy distributions of PKS 0735+178, we expect to investigate the physical conditions for neutrino production during different stages of the source activity. We analyze the multi-wavelength data during the selected periods of time. Using numerical simulations of radiation processes in the source, we study the parameter space of one-zone leptonic and leptohadronic models and find the best-fit solutions that explain the observed photon fluxes. We show the impact of model parameter degeneracy on the prediction of the neutrino spectra. We show that the available mutli-wavelength data are not sufficient to predict the neutrino spectrum unambiguously. Still, under the condition of maximal neutrino flux, we propose a scenario in which 0.2 neutrino events are produced during the 50 days flare.
%F PUB:(DE-HGF)16
%9 Journal Article
%R 10.1051/0004-6361/202452143
%U https://bib-pubdb1.desy.de/record/642881