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arXiv 0903.3617gr-qcastro-ph.HEhep-thmath-phmath.MP
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具有连续谱的Teukolsky主方程的精确解

Exact Solutions of Teukolsky Master Equation with Continuous Spectrum

Roumen S. Borissov, Plamen P. Fiziev

摘要:

弱引力场、弱电磁场、弱中微子场和弱标量场作为Kerr背景的微扰,满足Teukolsky主方程。分离变量后得到的两个非平凡方程是极角方程和径向方程。我们通过将每一个转化为合流Heun方程的形式来解决它们。这种变换依赖于一组参数,这些参数可以这样选择,所以得到的方程对于中微子、电磁和引力扰动都有简单的多项式解,只要满足一些附加条件。值得注意的是,对于$|s|=1/2$和$|s|=1$这两个不同的方程,存在一类解,其中这些附加条件是相同的。结果,附加条件固定了分离常数对角频率的依赖性,但频率本身保持不受约束,并且属于连续谱。

英文摘要:

Weak gravitational, electromagnetic, neutrino and scalar fields, considered as perturbations on Kerr background satisfy Teukolsky Master Equation. The two non-trivial equations obtained after separating the variables are the polar angle equation and the radial equation. We solve them by transforming each one into the form of a confluent Heun equation. The transformation depends on a set of parameters, which can be chosen in a such a way, so the resulting equations have simple polynomial solutions for neutrino, electromagnetic, and gravitational perturbations, provided some additional conditions are satisfied. Remarkably there exists a class of solutions for which these additional conditions are the same for the two different equations for $|s|=1/2$ and $|s|=1$. As a result the additional conditions fix the dependence of the separation constant on the angular frequency but the frequency itself remains unconstrained and belongs to a continuous spectrum.

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