Ott C D, Dimmelmeier H, Marek A, Janka H-T, Hawke I, Zink B, Schnetter E
Max-Planck-Institut für Gravitationsphysik, Albert-Einstein-Institut, Am Mühlenberg 1, D-14476 Potsdam, Germany.
Phys Rev Lett. 2007 Jun 29;98(26):261101. doi: 10.1103/PhysRevLett.98.261101.
We present 2D and 3D simulations of the collapse of rotating stellar iron cores in general relativity employing a nuclear equation of state and an approximate treatment of deleptonization. We compare fully general relativistic and conformally flat evolutions and find that the latter treatment is sufficiently accurate for the core-collapse supernova problem. We focus on gravitational wave (GW) emission from rotating collapse, bounce, and early postbounce phases. Our results indicate that the GW signature of these phases is much more generic than previously estimated. We also track the growth of a nonaxisymmetric instability in one model, leading to strong narrow-band GW emission.
我们利用核状态方程和去轻子化的近似处理方法，给出了广义相对论中旋转恒星铁芯坍缩的二维和三维模拟。我们比较了完全广义相对论演化和共形平坦演化，发现后一种处理方法对于铁芯坍缩超新星问题足够准确。我们关注旋转坍缩、反弹和反弹后早期阶段的引力波（GW）发射。我们的结果表明，这些阶段的GW特征比之前估计的要普遍得多。我们还跟踪了一个模型中非轴对称不稳定性的增长，导致强烈的窄带GW发射。
