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arXiv 1208.6489gr-qc
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非旋进旋转黑洞双星的渐近匹配时空度规

Asymptotically Matched Spacetime Metric for Non-Precessing, Spinning Black Hole Binaries

Louis Gallouin, Hiroyuki Nakano, Nicolas Yunes, Manuela Campanelli

摘要:

我们构建了一个封闭的形式,完全解析的4-度规,近似代表了时空演化的非进动,旋转黑洞二进制从无限分离到几个轨道之前合并。我们采用渐近匹配的技术,将每个自旋黑洞附近的扰动克尔度规连接到更远的近区后牛顿度规。后者已经自然地匹配到远区,后闵可夫斯基度量,占全部时间延迟。其结果是一个4-度量,它在空间和一小丛空间超曲面中近似处处有效。我们在这里限制我们的注意力准圆轨道,但该方法是有效的任何轨道运动或物理场景,提供一个重叠区域的有效性或缓冲区存在。这样一个度量的一个简单的扩展将允许未来的研究吸积盘和喷流动力学周围的旋转回洞双星。

英文摘要:

We construct a closed-form, fully analytical 4-metric that approximately represents the spacetime evolution of non-precessing, spinning black hole binaries from infinite separations up to a few orbits prior to merger. We employ the technique of asymptotic matching to join a perturbed Kerr metric in the neighborhood of each spinning black hole to a near-zone, post-Newtonian metric farther out. The latter is already naturally matched to a far-zone, post-Minkowskian metric that accounts for full temporal retardation. The result is a 4-metric that is approximately valid everywhere in space and in a small bundle of spatial hypersurfaces. We here restrict our attention to quasi- circular orbits, but the method is valid for any orbital motion or physical scenario, provided an overlapping region of validity or buffer zone exists. A simple extension of such a metric will allow for future studies of the accretion disk and jet dynamics around spinning back hole binaries.

机构、总结、中文摘要均由AI分析而来,可能存在错误,请以论文正文为准。

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