Matter Mixing in Aspherical Core-collapse Supernovae: Three-dimensional Simulations with Single-star and Binary Merger Progenitor Models for SN 1987A
Matter Mixing in Aspherical Core-collapse Supernovae: Three-dimensional Simulations with Single-star and Binary Merger Progenitor Models for SN 1987A
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DOI：
10.3847/1538-4357/ab5dba
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发表时间：
2019-12
期刊：
影响因子：
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通讯作者：
M. Ono;S. Nagataki;G. Ferrand;Koh Takahashi;H. Umeda;T. Yoshida;S. Orlando;M. Miceli
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文献类型：
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作者：
M. Ono;S. Nagataki;G. Ferrand;Koh Takahashi;H. Umeda;T. Yoshida;S. Orlando;M. Miceli
我们进行了三维流体动力学模拟的非球面核心坍缩超新星，重点是在SN 1987 A的物质混合。研究了四种前超新星模型和参数化非球面爆炸的影响。四个超新星爆发前的模型包括蓝超巨星（BSG）模型，该模型基于最近为SN 1987 A的祖先开发的缓慢合并方案（Urushibata等人）。另两个是基于单星演化的BSG模型和两个红超巨星（RSG）模型。在调查的爆炸（模拟）模型中，一个模型与二进制合并祖模型和不对称的双极爆炸，它调用一个射流爆炸，最好的再现约束的质量高速56镍，推断从观察到的[Fe二]线配置文件。二元合并先驱体模型的优点是C+O核和氦层的ρ r3分布平坦且延伸较少，这可能是由于氦核质量小。从最佳爆炸模型出发，预测了双极爆炸轴的方向（最强爆炸方向）和中子星星（NS）反冲的速度和方向。其他相关的影响和未来的展望也被给出。
We perform three-dimensional hydrodynamic simulations of aspherical core-collapse supernovae, focusing on the matter mixing in SN 1987A. The impacts of four progenitor (pre-supernova) models and parameterized aspherical explosions are investigated. The four pre-supernova models include a blue supergiant (BSG) model based on a slow-merger scenario developed recently for the progenitor of SN 1987A (Urushibata et al. ). The others are a BSG model based on a single-star evolution and two red supergiant (RSG) models. Among the investigated explosion (simulation) models, a model with the binary merger progenitor model and an asymmetric bipolar-like explosion, which invokes a jetlike explosion, best reproduces constraints on the mass of high-velocity 56Ni, as inferred from the observed [Fe ii] line profiles. The advantage of the binary merger progenitor model for the matter mixing is the flat and less extended ρ r3 profile of the C+O core and the helium layer, which may be characterized by the small helium core mass. From the best explosion model, the direction of the bipolar explosion axis (the strongest explosion direction) and the neutron star (NS) kick velocity and direction are predicted. Other related implications and future prospects are also given.