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arXiv 1811.04432gr-qc
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Regge-Wheeler规范和Easy规范中的引力自力正则化

Gravitational Self-Force Regularization in the Regge-Wheeler and Easy Gauges

Jonathan E. Thompson, Barry Wardell, Bernard F. Whiting

摘要:

我们提出了数值计算结果的引力自作用力和红移不变量的Regge-Wheeler和Easy规的圆形轨道在史瓦西背景下,利用正则化框架介绍了庞德,梅林和巴拉克。数值计算是在频域中进行的,并且需要单个二阶常微分方程的积分,大大提高了传统洛伦兹规范数值方法的计算时间。一个足够高的阶,解析扩展的Detweiler-Whiting奇异场规范变换到Regge-Wheeler和Easy规范,并用于构建张量谐波模式和正则化参数。通过将Lorenz规范自引力明确地规范变换为Regge-Wheeler规范和Easy规范,我们将我们的结果与Lorenz规范中计算的引力自引力进行了比较,发现我们的结果对于轨道半径为$r_0=6M$的情况,相对精度为$10^{-15}$,对于轨道半径为$r_0=10M$的情况,相对精度为$10^{-16}$.

英文摘要:

We present numerical results for the gravitational self-force and redshift invariant calculated in the Regge-Wheeler and Easy gauges for circular orbits in a Schwarzschild background, utilizing the regularization framework introduced by Pound, Merlin, and Barack. The numerical calculation is performed in the frequency domain and requires the integration of a single second-order ODE, greatly improving computation times over more traditional Lorenz gauge numerical methods. A sufficiently high-order, analytic expansion of the Detweiler-Whiting singular field is gauge-transformed to both the Regge-Wheeler and Easy gauges and used to construct tensor-harmonic mode-sum regularization parameters. We compare our results to the gravitational self-force calculated in the Lorenz gauge by explicitly gauge-transforming the Lorenz gauge self-force to the Regge-Wheeler and Easy gauges, and find that our results agree to a relative accuracy of $10^{-15}$ for an orbital radius of $r_0=6M$ and $10^{-16}$ for an orbital radius of $r_0=10M$.

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