Colloquium on May. 20, 2026

Neutrino and Gamma-Ray Emission from TXS 0506+056: A Photohadronic Approach

Speaker: Sarira Sahu (Universidad Nacional Autónoma de México)

Venue: SWIFAR Building 2111

Time: 16:00 PM, Wednesday, May. 20, 2026

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. Here, we also give the necessary conditions for the production of IceCube neutrino event from TXS 0506+056. I shall also talk about the recent development in the observation of IceCube neutrino events.