Light Curves of Core-Collapse Supernovae With Substantial Mass Loss Using the New Open-Source Supernova Explosion Code (Snec)

We present the SuperNova Explosion Code (SNEC), an open-source Lagrangian code for the hydrodynamics equilibrium-diffusion radiation transport in the expanding envelopes of supernovae. Given a model of a star, an explosion energy, and an amount and distribution of radioactive nickel, SNEC generates the light curve, as well as the light curves in different wavelength bands assuming black body emission. a first application of SNEC, we consider the explosions of a grid of 15 M_⊙ (at zero-age main sequence) whose hydrogen envelopes are stripped to different extents and at different points in their evolution. The light curves exhibit plateaus with durations of ∼20 − 100 days if & 1. 5 − 2 M_⊙ of hydrogen-rich is left and no plateau if less hydrogen-rich material is left. The shorter plateau lengths are unlike the IIP supernova light curves typically observed in nature. This suggests that, at least for zero-age main masses. 20 M_⊙, hydrogen mass loss occurs as an all or nothing process, perhaps pointing to the role binary interactions play in observed mass-stripped supernovae (i. e. , Type Ib/c events). These curves are also unlike what is typically seen for Type IIL supernovae, arguing that simply varying the of mass loss cannot explain these events. The most stripped models begin to show double-peaked light similar to what is often seen for Type IIb supernovae, confirming previous work that these supernovae come from progenitors that have a small amount of hydrogen and a radius of ∼ 500 R_⊙.