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In recent years, the viability of the pair-instability supernova (PISN)scenario for explaining superluminous supernovae has all but disappeared exceptfor a few slowly-evolving examples. However, PISN are not predicted to besuperluminous throughout the bulk of their mass range. In fact, it is morelikely that the first PISN we see (if we have not seen one already) will not besuperluminous. Here, we present hydrodynamic simulations of PISNe for fourstellar models with unique envelope properties spanning the PISN mass range. Inaddition, we compute synthetic light curves for comparison with current andfuture observations. We also investigate, in the context of our most massivemodel, the prospect of mixing in the supernova ejecta alleviating discrepanciesbetween current PISN models and the remaining superluminous candidate events.To this end, we present the first published 3D hydrodynamic simulations ofPISNe. After achieving convergence between 1D, 2D, and 3D simulations weexamine mixing in the supernova ejecta and its affect on the bolometric lightcurve. We observe slight deviations from spherical symmetry which increase withthe number of dimensions. We find no significant effects on the bolometriclight curve, however we conclude that mixing between the silicon and oxygenrich layers caused by the Rayleigh-Taylor instability may affect spectra.

Pair-Instability Supernova Simulations: Progenitor Evolution, Explosion, and Light Curves