arXivDaily arXiv每日学术速递 周一至周五更新
arXiv 2004.11979gr-qc
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最终黑洞内部:穿刺和捕获表面动力学

Inside the Final Black Hole: Puncture and Trapped Surface Dynamics

Christopher Evans, Deborah Ferguson, Bhavesh Khamesra, Pablo Laguna, Deirdre Shoemaker

摘要:

在黑洞双星的数值模拟中,一种流行的方法是将黑洞模拟为时空结构中的穿孔。黑洞穿刺的位置和性质的跟踪与表观地平线,即最外边缘外捕获表面(MOTS)。当两个黑洞相互靠近时,一个共同的视视界突然出现,吞没了两个黑洞,发出了合并的信号。在动力学视界的框架下,详细研究了常见视视界的演化及其与引力波发射的关系。我们提出了一个MOTS的动力学和他们的穿刺在内部的最终黑洞的研究。研究的重点是各种初始分离和质量比的迎面合并。我们发现,MOTS相交的参数空间的大部分。我们表明,对于那些情况下,他们不,这是因为在研究中使用的移动穿刺规范条件的奇异性避免属性。虽然我们无法进行足够长的时间来显示穿孔的最终命运的演变,我们的研究结果表明,MOTS总是相交的,在晚些时候,它们的重叠只是部分的。因此,MOTS内的穿孔尽管彼此足够接近以有效地充当单个穿孔,但不会合并。

英文摘要:

A popular approach in numerical simulations of black hole binaries is to model black holes as punctures in the fabric of spacetime. The location and the properties of the black hole punctures are tracked with apparent horizons, namely outermost marginally outer trapped surfaces (MOTSs). As the holes approach each other, a common apparent horizon suddenly appears, engulfing the two black holes and signaling the merger. The evolution of common apparent horizons and their connection with gravitational wave emission have been studied in detail with the framework of dynamical horizons. We present a study of the dynamics of the MOTSs and their punctures in the interior of the final black hole. The study focuses on head-on mergers for various initial separations and mass ratios. We find that MOTSs intersect for most of the parameter space. We show that for those situations in which they do not, it is because of the singularity avoidance property of the moving puncture gauge condition used in the study. Although we are unable to carry out evolutions that last long enough to show the ultimate fate of the punctures, our results suggest that MOTSs always intersect and that at late times their overlap is only partial. As a consequence, the punctures inside the MOTSs, although close enough to each other to act effectively as a single puncture, do not merge.

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