Constraints on the Cosmic Neutrino Background from NGC1068

by Jack Franklin

Friday 15 Mar 2024, 14:00 → 15:00 Europe/London

OC218

We investigate IceCube's ability to constrain the neutrino relic abundance using events from the recently identified neutrino source NGC1068. Since these neutrinos have large energies

(> 1 TeV) and have propagated through large distances, they make a great probe for overabundances of the cosmic neutrino background.

 

The propagation of neutrinos from NGC1068 was simulated by solving a transport equation, which takes into account the SM neutrino-neutrino interactions. The final fluxes produced are then analysed using publicly released IceCube data. Our preliminary results indicate that IceCube is able to improve the current bounds on a relic neutrino overabundance by 3 orders of magnitude compared to current experimental bounds, i.e. to less than ~ 10^9 cm^-3 at the 2 sigma confidence level.