Shock Breakout Signals: Convective versus Jet-Driven Supernova/Hypernova Signals

The explosive mechanism behind supernovae and hypernovae can be classified into two categories: convective-driven and jet-driven explosions. In the extreme case where the jet is highly relativistic after propagating through the star, a powerful gamma-ray burst is produced. But, if the jet engine is common, we expect a continuum relativistic ejecta from jet outbursts depending upon the amount of baryon contamination. We also expect a range in the distribution of relativistic ejecta from convective engine explosions. This relativistic ejecta in this engine is produced when the shock accelerates down the steep density gradient of the stellar edge, and the distribution of the ejecta Lorentz-factors depends upon the nature of this gradient. The shock breakout signal, thermal emission produced from the emergence of these shocks from the star, can peak anywhere from high-energy ultraviolet photons to gamma-rays. The peak of this emission and its evolution can be used to probe the nature of the explosion. Here we present simulations of the shock breakout signal from these different ejecta distributions.