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We perform three-dimensional hydrodynamic simulations of asphericalcore-collapse supernovae focusing on the matter mixing in SN 1987A. The impactsof four progenitor (pre-supernova) models and parameterized asphericalexplosions are investigated. The four pre-supernova models include a bluesupergiant (BSG) model based on a slow merger scenario developed recently forthe progenitor of SN 1987A (Urushibata et al. 2018). The others are a BSG modelbased on a single star evolution and two red supergiant (RSG) models. Among theinvestigated explosion (simulation) models, a model with the binary mergerprogenitor model and with an asymmetric bipolar-like explosion, which invokes ajetlike explosion, best reproduces constraints on the mass of high velocity$^{56}$Ni, as inferred from the observed [Fe II] line profiles. The advantageof the binary merger progenitor model for the matter mixing is the flat andless extended $\rho \,r^3$ profile of the C+O core and the helium layer, whichmay be characterized by the small helium core mass. From the best explosionmodel, the direction of the bipolar explosion axis (the strongest explosiondirection), the neutron star (NS) kick velocity, and its direction arepredicted. Other related implications and future prospects are also given.

Matter Mixing in Aspherical Core-collapse Supernovae: Three-dimensional Simulations with Single Star and Binary Merger Progenitor Models for SN 1987A