Geometry and regularity of moving punctures.
Geometry and regularity of moving punctures.
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移动穿刺的几何形状和规律性。
DOI：
10.1103/physrevlett.99.241102
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发表时间：
2006
影响因子：
8.6
通讯作者：
N. Murchadha
中科院分区：
文献类型：
--
作者：
M. Hannam;S. Husa;D. Pollney;B. Brügmann;N. Murchadha
黑洞双星的数值模拟最近取得了重大进展，使用穿刺方法。我们通过演化一个黑洞来研究这种方法是如何以及为什么起作用的。的坐标奇异性，因此在穿刺的几何形状被发现在进化过程中发生变化，从代表一个渐近平坦的结束，是一个圆柱体。我们构造了球对称黑洞定态的解析解，该解与数值结果相匹配，并证明演化并不受穿刺处伪影的主导，而是确实找到了解析结果。
Significant advances in numerical simulations of black-hole binaries have recently been achieved using the puncture method. We examine how and why this method works by evolving a single black hole. The coordinate singularity and hence the geometry at the puncture are found to change during evolution, from representing an asymptotically flat end to being a cylinder. We construct an analytic solution for the stationary state of a black hole in spherical symmetry that matches the numerical result and demonstrates that the evolution is not dominated by artefacts at the puncture but indeed finds the analytical result.