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arXiv 2406.02101gr-qc
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围绕致密星运行的质点的普适引力自力

Universal gravitational self-force for a point mass orbiting around a compact star

Xuefeng Feng, Huan Yang

AI总结:

本文研究了质点围绕非旋转致密星圆轨道运动的引力自力,发现附加自力可由普适频率函数与潮汐形变率乘积表征,为极端质量比旋近波形建模及检验广义相对论奠定基础。

摘要:

本文研究了在非旋转致密星周围做圆轨道运动的质点的引力反作用(即“自力”)。我们发现,与质点围绕 Schwarzschild 黑洞运动的情况相比,附加的自力可以很好地用一个普适的频率相关函数乘以致密星的(动力学)潮汐形变率来表征。这一发现为建立类星黑洞模拟物周围的极端质量比旋近系统的波形模型奠定了基础,该系统与利用天基引力波探测器检验广义相对论和奇异致密天体相关。

英文摘要:

In this work, we study the gravitational back-reaction (i.e., the "self-force") of a point mass moving around a non-rotating, compact star on a circular orbit. We find that the additional self-force, comparing with the case with a point mass orbiting around a Schwarzschild black hole, can be well characterized by an universal frequency-dependent function multiplied by the (dynamical) tidal deformability of the compact star. This finding provides the foundation for building the waveform model for an extreme mass-ratio inspiral system around a star-like black hole mimicker, which is relevant for testing General Relativity and exotic compact objects with space-borne gravitational wave detectors.

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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