Asymmetry and Global Mixing in SN 1987A by the Non-Spherical Shock Wave : Astrophysics and Relativity

概要

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We studied the asymmetry in the supernova explosion by the non-spherical shock wave using the two-dinensional axial symmetric hydrodynamical code. Our basic idea is the same as that of Chevalier et al., but the model of the asymmetric star is different. We found that the initially spherical shock wave becomes asymmetric in passing through the flattened core induced by stellar rotation. This asymmetric shock wave may explain the non-spherically expanding envelope in SN 1987A suggested by the speckle and polarization observations. We also investigated the possibility of global matter mixing. Matters tend to move toward the symmetric axis, and the global matter mixing is possible if the degree of deformation of the core is large. This asymmetry of shock is not reduced even if the outer envelope is almost spherically symmetric. We also found that if the initial shock is jet-like (stronger in the polar direction), this tendency is more strengthened.
理論物理学刊行会の論文
1990-04-25