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北美退伍军人节(Veterans Day),12 日无更新
arXiv 0807.2985gr-qcastro-ph
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黑洞合并的最终质量和自旋

The final mass and spin of black hole mergers

Wolfgang Tichy, Pedro Marronetti

摘要:

我们认为黑洞是由二进制黑洞合并。通过拟合数值结果,我们构建了预测最终黑洞的质量和自旋的解析公式。我们的公式适用于任意的初始自旋和质量比,并与现有的数值模拟吻合良好。我们使用我们的自旋公式的背景下,两个常见的合并方案超大质量星系黑洞。我们考虑的情况下,各向同性分布的初始自旋取向(当没有周围的物质是本),也是当物质紧密对齐的自旋与轨道角动量的情况下。由连续几代合并(具有对称质量比$η$)产生的黑洞自旋幅度在各向同性情况下的平均值为$1.73η+ 0.28$,在紧密排列的情况下为0.94。

英文摘要:

We consider black holes resulting from binary black hole mergers. By fitting to numerical results we construct analytic formulas that predict the mass and spin of the final black hole. Our formulas are valid for arbitrary initial spins and mass ratios and agree well with available numerical simulations. We use our spin formula in the context of two common merger scenarios for supermassive galactic black holes. We consider the case of isotropically distributed initial spin orientations (when no surrounding matter is present) and also the case when matter closely aligns the spins with the orbital angular momentum. The spin magnitude of black holes resulting from successive generations of mergers (with symmetric mass ratio $η$) has a mean of $1.73η+ 0.28$ in the isotropic case and 0.94 for the closely aligned case.

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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