Gravitational wave signatures of ab initio two-dimensional core collapse supernova explosion models for 12 – 25 M ⊙ stars
Gravitational wave signatures of ab initio two-dimensional core collapse supernova explosion models for 12 – 25 M ⊙ stars
复制标题
12 – 25 M ⊙ 恒星从头算二维核心塌陷超新星爆炸模型的引力波特征
DOI：
10.1103/physrevd.92.084040
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发表时间：
2015
影响因子：
5
通讯作者：
E. Lingerfelt
中科院分区：
文献类型：
--
作者：
K. Yakunin;A. Mezzacappa;P. Marronetti;S. Yoshida;S. Bruenn;W. Hix;E. Lentz;O. E. Bronson Messer;J. A. Harris;E. Endeve;J. Blondin;E. Lingerfelt
在这里，我们提出的重力波形计算从头算的二维核心坍缩超新星模型演化的嵌合体代码的祖质量之间的12和25 M。所有模型都采用了逐射线近似下的多频中微子输运、最先进的弱相互作用物理学、相对论输运修正（如中微子的引力红移）、具有相称相对论修正的二维流体力学、具有广义相对论修正的牛顿自引力和具有220 MeV压缩性的拉蒂默-斯韦斯蒂状态方程，开始与最近的伍斯利-海格非旋转的祖先在这个质量范围。我们所有的模型都表现出强烈的爆炸。此外，我们的波形捕获超新星发展的所有阶段：1）相对较短和较弱的提示信号，2）静止阶段，3）由于对流和静止吸积激波不稳定活动的强信号，4）终止到原中子星星上的主动吸积，以及5）缓慢增加的尾部，达到饱和值。傅立叶分解表明，我们预测的引力波信号应该可以通过AdvLIGO在这里考虑的祖先范围内观察到银河系事件。这些模型的基本局限性在于它们强加的轴对称性。进一步的进展将需要对应的三维模型，这一工作正在进行中。
Here, we present the gravitational waveforms computed in ab initio two-dimensional core collapse supernova models evolved with the chimera code for progenitor masses between 12 and 25 M. For all models employ multifrequency neutrino transport in the ray-by-ray approximation, state-of-the-art weak interaction physics, relativistic transport corrections such as the gravitational redshift of neutrinos, two-dimensional hydrodynamics with the commensurate relativistic corrections, Newtonian self-gravity with a general-relativistic monopole correction, and the Lattimer-Swesty equation of state with 220 MeV compressibility, and begin with the most recent Woosley-Heger nonrotating progenitors in this mass range. All of our models exhibit robust explosions. Moreover, our waveforms capture all stages of supernova development: 1) a relatively short and weak prompt signal, 2) a quiescent stage, 3) a strong signal due to convection and standing accretion shock instability activity, 4) termination of active accretion onto the proto-neutron star, and 5) a slowly increasing tail that reaches a saturation value. Fourier decomposition shows that the gravitational wave signals we predict should be observable by AdvLIGO for Galactic events across the range of progenitors considered here. The fundamental limitation of these models is in their imposition of axisymmetry. Further progress will require counterpart three-dimensional models, which are underway.