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arXiv 0710.0879gr-qcastro-ph
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三个黑洞的近距离相遇

Close encounters of three black holes

Manuela Campanelli, Carlos O. Lousto, Yosef Zlochower

摘要:

我们提出了第一个完全相对论性的长期数值演化的三个等质量的黑洞在一个系统组成的第三个黑洞在一个封闭的轨道上的黑洞双星。我们发现,这些密切的三黑洞系统有非常不同的合并动力学从黑洞双星。特别是,我们看到了复杂的轨迹,能量的重新分配,可以给其中一个洞,独特的波形,以及对发射的引力辐射的抑制。我们进化出两种这样的配置,并发现非常不同的行为。在一种配置中,双星系统很快被破坏,单个黑洞遵循复杂的轨道,并迅速连续地与第三个黑洞合并,而在另一种配置中,双星系统在其中一个成员与第三个黑洞合并之前完成了半个轨道,由此产生的两个黑洞系统形成了一个高度椭圆形,分离良好的双星,(至少)在演化的第一个t~ 1000 M没有明显的螺旋。

英文摘要:

We present the first fully relativistic longterm numerical evolutions of three equal-mass black holes in a system consisting of a third black hole in a close orbit about a black-hole binary. We find that these close-three-black-hole systems have very different merger dynamics from black-hole binaries. In particular, we see complex trajectories, a redistribution of energy that can impart substantial kicks to one of the holes, distinctive waveforms, and suppression of the emitted gravitational radiation. We evolve two such configurations and find very different behaviors. In one configuration the binary is quickly disrupted and the individual holes follow complicated trajectories and merge with the third hole in rapid succession, while in the other, the binary completes a half-orbit before the initial merger of one of the members with the third black hole, and the resulting two-black-hole system forms a highly elliptical, well separated binary that shows no significant inspiral for (at least) the first t~1000M of evolution.

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