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arXiv 1912.09286gr-qc
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广义相对论之外黑洞的Eikonal拟正规模II:广义标量-张量扰动

Eikonal quasinormal modes of black holes beyond general relativity II: generalised scalar-tensor perturbations

Hector O. Silva, Kostas Glampedakis

摘要:

黑洞“光谱学”,即通过引力波观测确定准正规模频率,是检验黑洞广义相对论性质的一种强有力的技术。在超越广义相对论的引力理论中,受扰动的黑洞通常由一组张量场和额外标量/矢量自由度的耦合波方程描述,从而导致理论特定的准正规模谱。在本文中,我们使用程函/几何光学近似获得的频率和阻尼率的基本准正规模式的广义,理论不可知的方程组描述耦合标量-张量扰动的球对称黑洞的解析公式。代表我们最近的工作的一个扩展,本模型包括一个大规模的标量场,耦合通过场的导数和一阶框架拖动旋转校正。离开球对称,我们考虑在一般的静态轴对称时空的标量波动方程的简单模型,并使用程函近似计算与赤道和非赤道光子环的准正规模式。

英文摘要:

Black hole `spectroscopy', i.e. the identification of quasinormal mode frequencies via gravitational wave observations, is a powerful technique for testing the general relativistic nature of black holes. In theories of gravity beyond general relativity perturbed black holes are typically described by a set of coupled wave equations for the tensorial field and the extra scalar/vector degrees of freedom, thus leading to a theory-specific quasinormal mode spectrum. In this paper we use the eikonal/geometric optics approximation to obtain analytic formulae for the frequency and damping rate of the fundamental quasinormal mode of a generalised, theory-agnostic system of equations describing coupled scalar-tensor perturbations of spherically symmetric black holes. Representing an extension of our recent work, the present model includes a massive scalar field, couplings through the field derivatives and first-order frame dragging rotational corrections. Moving away from spherical symmetry, we consider the simple model of the scalar wave equation in a general stationary-axisymmetric spacetime and use the eikonal approximation to compute the quasinormal modes associated with equatorial and nonequatorial photon rings.

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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