Dimitrios

We will present our results on the gamma emission from interaction-powered supernovae (SNe), a recently discovered type of SN suggested to be surrounded by a very dense Circumstellar Medium ($10^5-10^{11}~cm^{-3}$). These high densities favor the production of gamma ray photons through neutral pion decay as well as the photon production due to relativistic bremsstrahlung. Using a numerical code that includes synchrotron radiation, adiabatic losses due to the expansion of the source, relativistic bremsstrahlung, proton-proton collisions and proton-photon interactions, i.e. photopair ($pgamma rightarrow pe^{pm}$) and photopion ($pgamma rightarrow ppi^0, ~pgamma rightarrow ppi^{pm}$) production, we calculate the gamma ray emission ($>100 ~MeV$) soon after shock breakout and follow its temporal evolution until 100-1000 days. We show that both pp collisions and relativistic bremsstrahlung contribute significantly to the gamma ray emission and discuss the potential of detecting such SNe with the Fermi telescope.