Binary black hole merger gravitational waves and recoil in the large mass ratio limit
Binary black hole merger gravitational waves and recoil in the large mass ratio limit
复制标题
大质量比极限下的双黑洞合并引力波和反冲
DOI：
--
复制
发表时间：
2010
期刊：
影响因子：
--
通讯作者：
S. Hughes
中科院分区：
文献类型：
--
作者：
P. Sundararajan;G. Khanna;S. Hughes
数值相对论的重大突破使我们几乎可以完全概括地计算时空动力学，使我们能够在基本上没有近似的情况下模拟双黑洞的合并和合并。这些计算的主要限制现在是计算性的。特别是，它是很难建模系统与大质量比和大自旋，因为人们必须准确地解决多个长度尺度，在这样的系统中发挥作用。微扰理论在扩展二元体系的计算建模范围方面可以发挥重要作用。在本文中，我们提出的第一个结果的代码，使我们能够模拟引力波产生的螺旋，合并，并ringdown的一个二元系统中，一个成员的二进制是比其他更大的质量。这使我们能够准确地校准大质量比制度的二元动力学。我们集中在这个分析上的反冲赋予合并后的残留物，这些波。我们仔细研究了“反踢”，反相抵消的反冲所产生的暴跌和振铃波，详细描述了Schnittman等人。我们发现，轨道对准黑洞的自旋，反踢增长的自旋函数。总反冲是最小的，为一个快速旋转的黑洞，逆行合并成最大的。有趣的是，这完全逆转了只包括螺旋信息的分析中对踢与旋转的预测趋势。
Spectacular breakthroughs in numerical relativity now make it possible to compute spacetime dynamics in almost complete generality, allowing us to model the coalescence and merger of binary black holes with essentially no approximations. The primary limitation of these calculations is now computational. In particular, it is difficult to model systems with large mass ratio and large spins, since one must accurately resolve the multiple length scales that play a role in such systems. Perturbation theory can play an important role in extending the reach of computational modeling for binary systems. In this paper, we present first results of a code that allows us to model the gravitational waves generated by the inspiral, merger, and ringdown of a binary system in which one member of the binary is much more massive than the other. This allows us to accurately calibrate binary dynamics in the large mass ratio regime. We focus in this analysis on the recoil imparted to the merged remnant by these waves. We closely examine the ``antikick,' an antiphase cancellation of the recoil arising from the plunge and ringdown waves, described in detail by Schnittman et al. We find that, for orbits aligned with the black hole spin, the antikick grows as a function of spin. The total recoil is smallest for prograde coalescence into a rapidly rotating black hole, and largest for retrograde coalescence. Amusingly, this completely reverses the predicted trend for kick versus spin from analyses that only include inspiral information.
影响因子：
8.6
作者：
José A. González;U. Sperhake;B. Brügmann;M. Hannam;S. Husa
通讯作者：
José A. González;U. Sperhake;B. Brügmann;M. Hannam;S. Husa