Photohadronic model for the neutrino and $\gamma$-ray emission from TXS 0506+056

TL;DR

This paper applies a photohadronic model to explain the high-energy neutrino and gamma-ray emissions from TXS 0506+056, confirming AGN as sources of cosmic rays and neutrinos, and extends the model to other sources.

Contribution

The paper introduces a photohadronic model that explains observed gamma-ray and neutrino emissions from TXS 0506+056 and estimates fluxes for other sources like PKS B1424-418.

Findings

Successfully explains gamma-ray observations with the model.

Provides neutrino flux estimates consistent with IceCube data.

Extends the model to other astrophysical sources.

Abstract

The detection of a high energy muon neutrino on 22 September 2017 by IceCube neutrino detector coincides with the multiwavelength flaring from the BL Lac object TXS 0506+056, most likely confirming AGN as a source of high energy cosmic rays and neutrinos. Using the photohadronic model, we have explained the very high energy $\gamma$-rays observed by MAGIC telescopes few days after the neutrino event and extend the model to calculate the neutrino flux at different windows consistent with the flaring period of TXS 0506+056 and compared with the IceCube and MAGIC estimates. We also use this model to estimate the neutrino flux from the flaring of FSRQ PKS B1424-418 which is believed to be associated with the 2 PeV neutrino event observed by IceCube.