TY  - JOUR
AU  - Omeliukh, A.
AU  - Garrappa, S.
AU  - Fallah Ramazani, V.
AU  - Franckowiak, A.
AU  - Winter, W.
AU  - Lindfors, E.
AU  - Nilsson, K.
AU  - Jormanainen, J.
AU  - Wierda, F.
AU  - Filippenko, A. V.
AU  - Zheng, W.
AU  - Tornikoski, M.
AU  - Lähteenmäki, A.
AU  - Kankkunen, S.
AU  - Tammi, J.
TI  - Multi-epoch leptohadronic modeling of neutrino source candidate blazar PKS 0735+178
JO  - Astronomy and astrophysics
VL  - 695
IS  - arXiv:2409.04165
SN  - 0004-6361
CY  - Les Ulis
PB  - EDP Sciences
M1  - PUBDB-2025-05687
M1  - arXiv:2409.04165
SP  - A266 
PY  - 2025
N1  - A&A 695, A266 (2025). Accepted for publication in A&A
AB  - 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.
LB  - PUB:(DE-HGF)16
DO  - DOI:10.1051/0004-6361/202452143
UR  - https://bib-pubdb1.desy.de/record/642881
ER  -