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arXiv 2201.06186gr-qc
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在广义相对论及更广范围内黑洞准简正模频率的解析估计

Analytic estimates of quasi-normal mode frequencies for black holes in General Relativity and beyond

Kent Yagi

摘要:

在这一章中,我们回顾了程函技术来解析地导出黑洞的近似准简正模频率。我们首先回顾了广义相对论的过程,并将其扩展到广义相对论之外的理论。作为后者的一个例子,我们集中在标量Gauss-Bonnet引力,其中标量场可以以任意方式耦合到Gauss-Bonnet不变量的作用。在这个理论中,度规和标量扰动在极扇区中耦合,迫使等谱打破,使程函计算更加复杂。我们表明,解析估计可以准确地捕捉准简正模频率的数值行为,特别是当理论的耦合常数很小时。

英文摘要:

In this chapter, we review the eikonal technique to analytically derive approximate quasi-normal mode frequencies of black holes. We first review the procedure in General Relativity and extend it to theories beyond General Relativity. As an example of the latter, we focus on scalar Gauss-Bonnet gravity in which a scalar field can couple to the Gauss-Bonnet invariant in an arbitrary way in the action. In this theory, metric and scalar perturbations are coupled in the polar sector, forcing the isospectrality to break and making the eikonal calculation more complex. We show that the analytic estimates can accurately capture the numerical behavior of the quasi-normal mode frequencies, especially when the coupling constant of the theory is small.

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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