arXivDaily arXiv每日学术速递 周一至周五更新
arXiv周末暂无论文更新,休息一下吧,周末愉快~~
arXiv 1602.06759astro-ph.HE
收藏

快速旋转的核心坍缩超新星的三维模拟:发现非轴对称流辅助的中微子动力爆炸

Three-dimensional simulations of rapidly rotating core-collapse supernovae: finding a neutrino-powered explosion aided by non-axisymmetric flows

Tomoya Takiwaki, Kei Kotake, Yudai Suwa

摘要:

本文报道了在各向同性扩散源近似下采用中微子输运方案对$11.2$和27颗$M_{/odot}$星进行的一系列三维转动核坍缩模拟的结果。通过系统地改变旋转的初始强度,我们发现27个$M_{/odot}$祖细胞的旋转辅助爆炸,在没有旋转的情况下失败。在以前的二维(2D)自洽旋转模型中没有捕捉到的独特功能,因为不断增长的非轴对称不稳定性起着关键作用。在快速旋转的情况下,由所谓的低$T/|W|$不稳定性产生的强螺旋流增强了从原中子星(PNS)到增益区的能量输运,使激波膨胀更有能量。爆炸在垂直于旋转轴的方向上发生得更强烈,这与以前的2D预测不同。

英文摘要:

We report results from a series of three-dimensional (3D) rotational core-collapse simulations for $11.2$ and 27 $M_{/odot}$ stars employing neutrino transport scheme by the isotropic diffusion source approximation. By changing the initial strength of rotation systematically, we find a rotation-assisted explosion for the 27$M_{/odot}$ progenitor, which fails in the absence of rotation. The unique feature was not captured in previous two-dimensional (2D) self-consistent rotating models because the growing non-axisymmetric instabilities play a key role. In the rapidly rotating case, strong spiral flows generated by the so-called low $T/|W|$ instability enhance the energy transport from the proto-neutron star (PNS) to the gain region, which makes the shock expansion more energetic. The explosion occurs more strongly in the direction perpendicular to the rotational axis, which is different from previous 2D predictions.

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。

↑