REVIVAL OF THE STALLED CORE-COLLAPSE SUPERNOVA SHOCK TRIGGERED BY PRECOLLAPSE ASPHERICITY IN THE PROGENITOR STAR
REVIVAL OF THE STALLED CORE-COLLAPSE SUPERNOVA SHOCK TRIGGERED BY PRECOLLAPSE ASPHERICITY IN THE PROGENITOR STAR
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DOI：
10.1088/2041-8205/778/1/l7
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发表时间：
2013-09
期刊：
影响因子：
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通讯作者：
S. Couch;C. Ott
中科院分区：
文献类型：
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作者：
S. Couch;C. Ott
对大质量恒星高级核燃烧阶段的多维模拟表明，前超新星恒星的Si/O层与通常假设的前超新星恒星结构的球形对称有很大的偏差。我们在有和没有非球面速度扰动的情况下进行了三维核心坍缩超新星模拟，以评估它们对迟滞激波阶段超新星流体动力学的潜在影响。我们的结果表明，现实的扰动可以定性地改变弹跳后的演化，引发模型中的爆炸，而没有它们就无法爆炸。这一发现强调了对恒星演化的前超新星阶段进行多维处理的必要性。
Multi-dimensional simulations of advanced nuclear burning stages of massive stars suggest that the Si/O layers of presupernova stars harbor large deviations from the spherical symmetry typically assumed for presupernova stellar structure. We carry out three-dimensional core-collapse supernova simulations with and without aspherical velocity perturbations to assess their potential impact on the supernova hydrodynamics in the stalled-shock phase. Our results show that realistic perturbations can qualitatively alter the postbounce evolution, triggering an explosion in a model that fails to explode without them. This finding underlines the need for a multi-dimensional treatment of the presupernova stage of stellar evolution.