arXivDaily arXiv每日学术速递 周一至周五更新
arXiv 2202.06295astro-ph.HE
收藏

SN 1987 A联星祖星核心坍缩超新星的三维模拟

Three-dimensional simulation of a core-collapse supernova for a binary star progenitor of SN 1987A

Ko Nakamura, Tomoya Takiwaki, Kei Kotake

摘要:

我们使用Urushibata等人(2018)的SN 1987 A的二元演化祖先模型,在三维空间中展示了自洽,非旋转核心坍缩超新星模拟的结果。这个18.3太阳质量的祖先模型是由14颗和8颗太阳质量的恒星缓慢合并演化而来的,它满足大多数观测约束,如红蓝演化、寿命、总质量和坍缩时在赫兹-罗素图中的位置以及化学异常。我们的模拟是从一个球对称的崩溃,并映射到三维坐标反弹后10毫秒,按照非球形流体动力学的演变。我们得到了中微子驱动的冲击波复苏后反弹350毫秒,导致形成一个新诞生的中子星的平均引力质量为1.35太阳质量和自旋周期为0.1秒。我们还讨论了与SN 1987 A具有相同特征的银河系事件的引力波和中微子信号的可探测性。在我们的最终模拟时间(660 ms postbounce),诊断爆炸能量,虽然仍在增长,是较小的(0.15 foe)相比,观察值(1.5 foe)。从模拟中得到的56 Ni质量(0.01太阳质量)也小于SN 1987 A报告的质量(0.07太阳质量)。长期模拟包括我们的三维模型中缺少的几个物理成分,如旋转,磁场,或更精细的中微子不透明度,应该做的理论预测和观测值之间的差距桥梁。

英文摘要:

We present results from a self-consistent, non-rotating core-collapse supernova simulation in three spatial dimensions using a binary evolution progenitor model of SN 1987A by Urushibata et al. (2018). This 18.3 solar-mass progenitor model is evolved from a slow-merger of 14 and 8 solar-mass stars, and it satisfies most of the observational constraints such as red-to-blue evolution, lifetime, total mass and position in the Hertzsprung-Russell diagram at collapse, and chemical anomalies. Our simulation is initiated from a spherically symmetric collapse and mapped to the three-dimensional coordinates at 10 ms after bounce to follow the non-spherical hydrodynamics evolution. We obtain the neutrino-driven shock revival for this progenitor at 350 ms after bounce, leading to the formation of a newly-born neutron star with average gravitational mass of 1.35 solar mass and spin period of 0.1 s. We also discuss the detectability of gravitational wave and neutrino signals for a Galactic event with the same characteristics as SN 1987A. At our final simulation time (660 ms postbounce), the diagnostic explosion energy, though still growing, is smaller (0.15 foe) compared to the observed value (1.5 foe). The 56Ni mass obtained from the simulation (0.01 solar mass) is also smaller than the reported mass from SN 1987A (0.07 solar mass). Long-term simulation including several missing physical ingredients in our 3D models such as rotation, magnetic fields, or more elaborate neutrino opacity should be done to bridge the gap between the theoretical predictions and the observed values.

机构、总结、中文摘要均由AI分析而来,可能存在错误,请以论文正文为准。

↑