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arXiv 1007.2024gr-qc
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理解黑洞合并的混合方法:正面情形

A hybrid method for understanding black-hole mergers: head-on case

David A. Nichols, Yanbei Chen

摘要:

黑洞-双星并合过程通常分为三个阶段:涡卷、并合和衰荡。后牛顿(PN)近似处理螺旋相,黑洞微扰(BHP)理论描述衰荡,时空的非线性动力学描述合并。在本文中,我们介绍了一种混合的方法,结合PN和BHP理论的元素,并将其应用到与横向,反平行自旋的黑洞的正面碰撞。我们比较我们的近似技术与完整的数值相对论模拟,我们发现引力波形和辐射的能量和动量之间的良好协议。我们的研究结果表明,PN和BHP理论可能足以解释的主要特点,外向引力辐射的迎头合并。这将进一步意味着,精确黑洞解的线性扰动可以捕捉到远离碰撞的观测者可以接触到的双黑洞合并的非线性方面。

英文摘要:

Black-hole-binary coalescence is often divided into three stages: inspiral, merger and ringdown. The post-Newtonian (PN) approximation treats the inspiral phase, black-hole perturbation (BHP) theory describes the ringdown, and the nonlinear dynamics of spacetime characterize the merger. In this paper, we introduce a hybrid method that incorporates elements of PN and BHP theories, and we apply it to the head-on collision of black holes with transverse, anti-parallel spins. We compare our approximation technique with a full numerical-relativity simulation, and we find good agreement between the gravitational waveforms and the radiated energy and momentum. Our results suggest that PN and BHP theories may suffice to explain the main features of outgoing gravitational radiation for head-on mergers. This would further imply that linear perturbations to exact black-hole solutions can capture the nonlinear aspects of head-on binary-black-hole mergers accessible to observers far from the collision.

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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