A COMPARISON OF TWO- AND THREE-DIMENSIONAL NEUTRINO-HYDRODYNAMICS SIMULATIONS OF CORE-COLLAPSE SUPERNOVAE
A COMPARISON OF TWO- AND THREE-DIMENSIONAL NEUTRINO-HYDRODYNAMICS SIMULATIONS OF CORE-COLLAPSE SUPERNOVAE
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DOI：
10.1088/0004-637x/786/2/83
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发表时间：
2013-08
期刊：
影响因子：
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通讯作者：
T. Takiwaki;K. Kotake;Y. Suwa
中科院分区：
文献类型：
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作者：
T. Takiwaki;K. Kotake;Y. Suwa
我们提出了一个11.2 M的星星的二维（2D）和三维（3D）流体动力学核心塌陷模拟的数值结果。通过系统地改变数值分辨率和种子扰动，我们研究了反弹后动力学在2D和3D中的不同。的计算进行了与能量相关的治疗的中微子输运的各向同性扩散源近似方案的基础上，我们已经更新，以达到一个非常高的计算效率。所有的计算模型在这项工作中，包括9个三维模型和15个二维模型，表现出复苏的停滞反弹冲击，导致爆炸的可能性。所有这些都是由中微子加热机制驱动的，而中微子加热机制是由中微子驱动的对流和静止吸积激波不稳定性所促进的。反映多维（多维）中微子驱动爆炸的随机性，爆炸形态的变化，从模型到模型。然而，我们发现，最终的命运的多维模型，是否得到一个爆炸或没有，是受爆炸的随机性。与以前的一些研究一致，较高的数值分辨率导致在2D和3D的冲击复苏的发病较慢。基于自洽的超新星模型导致爆炸的可能性，我们的研究结果系统地表明，复苏的冲击波在2D比在3D更积极地扩大。
We present numerical results on two- (2D) and three-dimensional (3D) hydrodynamic core-collapse simulations of an 11.2 M☉ star. By changing numerical resolutions and seed perturbations systematically, we study how the postbounce dynamics are different in 2D and 3D. The calculations were performed with an energy-dependent treatment of the neutrino transport based on the isotropic diffusion source approximation scheme, which we have updated to achieve a very high computational efficiency. All of the computed models in this work, including nine 3D models and fifteen 2D models, exhibit the revival of the stalled bounce shock, leading to the possibility of explosion. All of them are driven by the neutrino-heating mechanism, which is fostered by neutrino-driven convection and the standing-accretion-shock instability. Reflecting the stochastic nature of multi-dimensional (multi-D) neutrino-driven explosions, the blast morphology changes from model to model. However, we find that the final fate of the multi-D models, whether an explosion is obtained or not, is little affected by the explosion stochasticity. In agreement with some previous studies, higher numerical resolutions lead to slower onset of the shock revival in both 2D and 3D. Based on the self-consistent supernova models leading to the possibility of explosions, our results systematically show that the revived shock expands more energetically in 2D than in 3D.