Hypernovae and Starbursts as Multimessenger High-Energy Sources

Recently the IceCube collaboration reported its first detection of high-energy (30 TeV -- 2 PeV) neutrinos that may have been produced in astrophysical events, thus ushering in a new paradigm for the way we view the universe. We investigate the contribution of hypernovae (HNe) in starburst and normal star-forming galaxies to the diffuse flux of PeV cosmic rays, MeV-TeV $\gamma $-rays, and TeV neutrinos by numerically solving the Boltzmann transport equation. Cosmic rays produce $\gamma $-rays and neutrinos when they interact with ambient matter. Diffusion of the cosmic rays amplifies the amount of $\gamma $-rays and neutrinos that are produced in general. We consider cosmic ray propagation and subsequent neutrino production in both the hypernovae host galaxies and intergalactic space.