Multi-epoch leptohadronic modeling of neutrino source candidate blazar PKS 0735+178
Abstract
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.
Keywords
Cite
@article{arxiv.2409.04165,
title = {Multi-epoch leptohadronic modeling of neutrino source candidate blazar PKS 0735+178},
author = {A. Omeliukh and S. Garrappa and V. Fallah Ramazani and A. Franckowiak and W. Winter and E. Lindfors and K. Nilsson and J. Jormanainen and F. Wierda and A. V. Filippenko and W. Zheng and M. Tornikoski and A. Lähteenmäki and S. Kankkunenand and J. Tammi},
journal= {arXiv preprint arXiv:2409.04165},
year = {2025}
}
Comments
Accepted for publication in A&A