Physics of Core-Collapse Supernovae in Three Dimensions: a Sneak Preview
Physics of Core-Collapse Supernovae in Three Dimensions: a Sneak Preview
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DOI：
10.1146/annurev-nucl-102115-044747
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发表时间：
2016-02
影响因子：
12.4
通讯作者：
H. Janka;T. Melson;A. S. M. Astrophysics;Garching;Physik Dept.;Tum
中科院分区：
文献类型：
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作者：
H. Janka;T. Melson;A. S. M. Astrophysics;Garching;Physik Dept.;Tum
非球形质量运动是核心坍缩超新星的一个普遍特征，流体动力学不稳定性在爆炸机制中起着至关重要的作用。第一次成功的中微子驱动爆炸可以在三维空间中用自洽的第一性原理模拟获得。但是三维（3D）模型往往比相应的轴对称二维（2D）模型更不容易发生爆炸。原因是三维湍流导致能量从大到小的空间尺度级联，与二维情况相反，从而不利于最大尺度上浮力羽流的增长。除非爆炸惯性仅仅反映了相关区域缺乏足够的分辨率，否则可能仍然缺少一些强大和足够能量的中微子爆炸的重要组成部分。这样的赤字可能与祖属性，如旋转，磁场，或崩溃前的扰动，或与微物理，可能会导致增强的neu…
Nonspherical mass motions are a generic feature of core-collapse supernovae, and hydrodynamic instabilities play a crucial role in the explosion mechanism. The first successful neutrino-driven explosions could be obtained with self-consistent, first-principles simulations in three spatial dimensions. But three-dimensional (3D) models tend to be less prone to explosion than the corresponding axisymmetric two-dimensional (2D) ones. The reason is that 3D turbulence leads to energy cascading from large to small spatial scales, the inverse of the 2D case, thus disfavoring the growth of buoyant plumes on the largest scales. Unless the inertia to explode simply reflects a lack of sufficient resolution in relevant regions, some important component of robust and sufficiently energetic neutrino-powered explosions may still be missing. Such a deficit could be associated with progenitor properties such as rotation, magnetic fields, or precollapse perturbations, or with microphysics that could cause enhancement of neu...