Modelling High-Energy Neutrino Emission from Star-Forming Activity using the SIMBA Cosmological Simulation

IceCube has detected a diffuse flux of high-energy neutrinos of astrophysical origin. Although high-enery neutrino sources have been identified, they contribute only a small fraction of the total flux, leaving most of its origin unresolved. We present a novel approach to modelling a diffuse high-energy neutrino flux from star-forming activity using SIMBA, a state-of-the-art cosmological simulation that incorporates the dynamical evolution of galaxies. Our methodology combines a phenomenological framework for high-energy neutrino production from active star-forming regions with this large-scale (100 \ h⁻¹ \ Mpc)³ hydrodynamical simulation. This approach allows us to trace high-energy neutrino emission from star-forming activity through cosmic history. We present predictions for the contribution of star-forming activity to the diffuse neutrino flux and outline the underlying modelling framework.