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arXiv 1506.04768gr-qcastro-ph.COastro-ph.GAastro-ph.HEastro-ph.SR
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一般黑洞双星的自旋翻转

Spin flips in generic black hole binaries

Carlos O. Lousto, James Healy, Hiroyuki Nakano

摘要:

研究了双星系统中单个黑洞的自旋动力学。特别是,我们专注于极旋进的自旋和一个完整的翻转自旋相对于轨道平面的可能性。我们进行了一个完整的数值模拟,显示这些特性。我们演化等质量的双旋转黑洞$t=20,000M$从最初的适当分离$d=25M$合并后48.5轨道。我们计算了这个系统的引力辐射,并将其与3.5后牛顿产生的波形进行比较,结果非常一致。然后,我们进一步使用3.5后牛顿的演变,以显示这种自旋{翻转}现象的扩展到不等质量的双星。我们还提供了解析表达式来近似的最大{触发}角和频率的二进制自旋和质量比参数在给定的轨道半径。最后,我们讨论了这种自旋{翻转}对吸积物质和其他潜在的观测效应的影响。

英文摘要:

We study the spin dynamics of individual black holes in a binary system. In particular we focus on the polar precession of spins and the possibility of a complete flip of spins with respect to the orbital plane. We perform a full numerical simulation that displays these characteristics. We evolve equal mass binary spinning black holes for $t=20,000M$ from an initial proper separation of $d=25M$ down to merger after 48.5 orbits. We compute the gravitational radiation from this system and compare it to 3.5 post-Newtonian generated waveforms finding close agreement. We then further use 3.5 post-Newtonian evolutions to show the extension of this spin {flip-flop} phenomenon to unequal mass binaries. We also provide analytic expressions to approximate the maximum {flip-flop} angle and frequency in terms of the binary spins and mass ratio parameters at a given orbital radius. Finally we discuss the effect this spin {flip-flop} would have on accreting matter and other potential observational effects.

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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