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arXiv 1507.05680astro-ph.SRastro-ph.HE
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中微子驱动的15 M恒星核塌缩超新星爆发

A Neutrino-Driven Core Collapse Supernova Explosion of a 15 M Star

Anthony Mezzacappa, Eric J. Lentz, Stephen W. Bruenn, W. Raphael Hix, O. E. Bronson Messer, Eirik Endeve, John M. Blondin, J. Austin Harris, Pedro Marronetti, K… 展开作者

Anthony Mezzacappa, Eric J. Lentz, Stephen W. Bruenn, W. Raphael Hix, O. E. Bronson Messer, Eirik Endeve, John M. Blondin, J. Austin Harris, Pedro Marronetti, Konstantin N. Yakunin, Eric J. Lingerfelt

摘要:

我们目前的结果从头算三维,多物理核心坍缩超新星模拟的情况下,15 M的祖。我们的模拟包括多频中微子输运与国家的最先进的中微子相互作用的“射线-射线”近似,近似广义相对论。我们的模型表现出中微子驱动的爆炸。激波半径在反弹后约275 ms处开始向外运动,这是模型中爆炸发展的第一个迹象。相对于我们的二维对应模型,这种冲击膨胀的发生是延迟的,该模型在核心反弹后大约200 ms开始。在反弹后441毫秒的时间,在我们的三维模型中的角度平均激波半径已达到751公里。在这个模型中的结果的进一步定量分析必须等待进一步发展的反弹后的动力学和模拟,将远远超过1秒后,恒星核心反弹,基于我们的二维背景下,对应模型的结果相同的祖先。这种更完整的分析将确定爆炸是否稳健,以及爆炸能量、56 Ni质量等可观测量是否与观测结果一致。尽管如此,在我们的多频中微子输运和广义相对论的从头算三维多物理模型中爆发的开始是令人鼓舞的。

英文摘要:

We present results from an ab initio three-dimensional, multi-physics core collapse supernova simulation for the case of a 15 M progenitor. Our simulation includes multi-frequency neutrino transport with state-of-the-art neutrino interactions in the "ray-by-ray" approximation, and approximate general relativity. Our model exhibits a neutrino-driven explosion. The shock radius begins an outward trajectory at approximately 275 ms after bounce, giving the first indication of a developing explosion in the model. The onset of this shock expansion is delayed relative to our two-dimensional counterpart model, which begins at approximately 200 ms after core bounce. At a time of 441 ms after bounce, the angle-averaged shock radius in our three-dimensional model has reached 751 km. Further quantitative analysis of the outcomes in this model must await further development of the post-bounce dynamics and a simulation that will extend well beyond 1 s after stellar core bounce, based on the results for the same progenitor in the context of our two-dimensional, counterpart model. This more complete analysis will determine whether or not the explosion is robust and whether or not observables such as the explosion energy, 56Ni mass, etc. are in agreement with observations. Nonetheless, the onset of explosion in our ab initio three-dimensional multi-physics model with multi-frequency neutrino transport and general relativity is encouraging.

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