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arXiv 0904.0033gr-qc
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Schwarzschild度规的调和规范扰动

Harmonic gauge perturbations of the Schwarzschild metric

Mark V. Berndtson

摘要:

卫星观测站LISA将能够探测来自极端质量比螺旋(EMRI)的引力波,例如围绕超大质量黑洞运行的小黑洞。小得多的质量的引力效应可以被视为已知背景度规的扰动,这里是史瓦西度规。微扰的爱因斯坦场方程构成一个由十个耦合的偏微分方程组成的系统。我们在谐波规范中求解方程,也称为洛伦兹规范或洛伦兹规范。利用分离变量和傅立叶变换,我们写出了满足解耦常微分方程的六个径向函数的频域解。这六个函数是Zerilli函数和五个自旋为2,1,0的广义Regge-Wheeler函数。我们利用这些解计算了圆轨道的引力自作用力。自作用力对运动方程给出了一阶微扰修正。论文第1.2节对此进行了较为详细的总结。

英文摘要:

The satellite observatory LISA will be capable of detecting gravitational waves from extreme mass ratio inspirals (EMRIs), such as a small black hole orbiting a supermassive black hole. The gravitational effects of the much smaller mass can be treated as the perturbation of a known background metric, here the Schwarzschild metric. The perturbed Einstein field equations form a system of ten coupled partial differential equations. We solve the equations in the harmonic gauge, also called the Lorentz gauge or Lorenz gauge. Using separation of variables and Fourier transforms, we write the frequency domain solutions in terms of six radial functions which satisfy decoupled ordinary differential equations. The six functions are the Zerilli and five generalized Regge-Wheeler functions of spin 2,1,0. We use the solutions to calculate the gravitational self-force for circular orbits. The self-force gives the first order perturbative corrections to the equations of motion. Section 1.2 of the thesis has a more detailed summary.

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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