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arXiv 0904.3541gr-qcastro-ph.COastro-ph.GAastro-ph.HEastro-ph.SR
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类属黑洞双星合并后的剩余质量、自旋和自旋

Remnant Masses, Spins and Recoils from the Merger of Generic Black-Hole Binaries

Carlos O. Lousto, Manuela Campanelli, Yosef Zlochower, Hiroyuki Nakano

摘要:

我们得到的经验公式的最终残余黑洞的质量,自旋和反冲速度从合并黑洞二进制与任意质量比和自旋。我们的公式是基于质量比和自旋依赖性的后牛顿表达式的瞬时辐射能,线动量,角动量,以及ISCO结合能和角动量。不同项之间的相对权重由通过最近可用的完全非线性数值模拟的最小二乘拟合选择的幅度参数固定。这些公式可用于星系核和星系团的N体模拟以及超大质量黑洞的宇宙学生长的统计研究。作为一个例子,我们使用这些公式来获得一个普遍的自旋大小分布的合并黑洞和反冲速度分布的干和热/冷湿合并。我们也重新审视长期的轨道进动和共振,并讨论它们如何影响自旋分布之前的合并制度。

英文摘要:

We obtain empirical formulae for the final remnant black hole mass, spin, and recoil velocity from merging black-hole binaries with arbitrary mass ratios and spins. Our formulae are based on the mass ratio and spin dependence of the post-Newtonian expressions for the instantaneous radiated energy, linear momentum, and angular momentum, as well as the ISCO binding energy and angular momentum. The relative weight between the different terms is fixed by amplitude parameters chosen through a least-squares fit of recently available fully nonlinear numerical simulations. These formulae can be used for statistical studies of N-body simulations of galaxy cores and clusters, and the cosmological growth of supermassive black holes. As an example, we use these formulae to obtain a universal spin magnitude distribution of merged black holes and recoil velocity distributions for dry and hot/cold wet mergers. We also revisit the long term orbital precession and resonances and discuss how they affect spin distributions before the merging regime.

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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