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arXiv 1602.01031gr-qcastro-ph.HE
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非标准Kerr时空中的相对论潮汐效应

Relativistic tidal effects in non standard Kerr space-time

Andrea Maselli, Kostas Kokkotas, Pablo Laguna

摘要:

天体物理现象涉及大质量黑洞(BH)在密切的双星预计留下可检测的签名在电磁和引力波谱。这种印记可能提供宝贵的信息,以探测旋转黑洞周围的时空,并揭示新的见解,在强场制度的引力的性质。为了支持这一观测窗口,开发合适的测试来验证广义相对论的预测至关重要。在这个框架下,Johannsen和Psaltis最近提出的度量参数化强场偏离克尔时空的理论独立的方式。在下文中,我们利用这种方法来描述旋转BH产生的潮汐场。我们计算的重力-磁场和重力-电场潮汐张量的赤道圆测地线上的粒子运动,比较我们的结果与标准的广义相对论的情况下得到的。我们的计算表明,即使距离最后的稳定轨道,这可能会影响到的演变的二进制和留下可检测的签名显着的差异。我们测试了我们的框架计算BH-白矮星系统的准平衡序列的仿射模型的装置,对于不同的二元配置。

英文摘要:

Astrophysical phenomena involving massive black holes (BHs) in close binaries are expected to leave detectable signatures in the electromagnetic and gravitational-wave spectrum. Such imprints may provide precious information to probe the space-time around rotating BHs and to reveal new insights on the nature of gravity in the strong-field regime. To support this observational window, it is crucial to develop suitable tests to verify the predictions of General Relativity. In this framework, the metric recently proposed by Johannsen and Psaltis parametrizes strong-field deviations from a Kerr space-time in a theory-independent way. In the following, we make use of this approach to describe the tidal field produced by spinning BHs. We compute the gravito-magnetic and gravito-electric tidal tensors for particles moving on equatorial circular geodesics, comparing our results with those obtained in the standard General Relativity scenario. Our calculations show significant differences even for distances far form the last stable orbit, which may affect the evolution of the binary and leave detectable signatures. We test our framework computing quasiequilibrium sequences of BH-white dwarf systems by means of the affine model, for different binary configurations.

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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