标题： 12至25倍太阳质量恒星的从头计算两维核心坍缩超新星爆炸模型的引力波特征 显示英文标题

标题： Gravitational Wave Signatures of Ab Initio Two-Dimensional Core Collapse Supernova Explosion Models for 12-25 Solar Masses Stars

摘要： 我们展示了用Chimera代码演化得到的来自12至25倍太阳质量先星的二维从头计算的核心坍缩超新星模型的引力波形。 所有模型都采用多频中微子输运的逐光束近似、最先进的弱相互作用物理、中微子的引力红移等相对论输运修正、具有相应相对论修正的二维流体力学、带有广义相对论单极修正的牛顿自引力以及具有220 MeV压缩性的Lattimer-Swesty状态方程，并以该质量范围内Woosley-Heger最新的非旋转先星作为初始条件。 我们的所有模型都表现出强烈的爆炸。 因此，我们的波形捕捉了超新星发展的所有阶段：1）相对较短且较弱的即时信号，2）平静阶段，3）由于对流和SASI活动产生的强信号，4）原中子星吸积活动的终止，以及5）缓慢增加的尾部，最终达到饱和值。 傅里叶分解显示，我们预测的引力波信号应该可以在AdvLIGO上观测到来自这里考虑的所有先星的银河系事件。 这些模型的根本局限性在于其轴对称性的假设。 进一步进展需要对应的三维模型，这些模型正在开发中。 显示英文摘要

摘要： 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 solar masses. All models employ multi-frequency 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. Therefore, 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 SASI 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.