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arXiv 1801.09616gr-qc
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Schwarzschild背景下沿圆轨道自旋粒子的Detweiler红移不变量

Detweiler's redshift invariant for spinning particles along circular orbits on a Schwarzschild background

Donato Bini, Thibault Damour, Andrea Geralico, Chris Kavanagh

摘要:

我们研究了经典自旋粒子在史瓦西背景下沿圆形轨道运动引起的度规扰动,将分析限制在自旋的一阶效应上。假设粒子在赤道平面上运动,其自旋与$z$轴对齐。通过使用两种不同的方法获得度量扰动,即,通过在两种不同的规范中工作:Regge-Wheeler规范(使用Regge-Wheeler-Zerilli形式)和辐射规范(使用Teukolsky形式)。然后,我们计算的线性自旋贡献的一阶自作用力的贡献德特韦勒的红移不变的8.5后牛顿秩序。我们检查,我们的结果是相同的,在这两个规范,适当的规范不变量,并同意目前已知的3.5后牛顿的结果。

英文摘要:

We study the metric perturbations induced by a classical spinning particle moving along a circular orbit on a Schwarzschild background, limiting the analysis to effects which are first order in spin. The particle is assumed to move on the equatorial plane and has its spin aligned with the $z$-axis. The metric perturbations are obtained by using two different approaches, i.e., by working in two different gauges: the Regge-Wheeler gauge (using the Regge-Wheeler-Zerilli formalism) and a radiation gauge (using the Teukolsky formalism). We then compute the linear-in-spin contribution to the first-order self-force contribution to Detweiler's redshift invariant up to the 8.5 post-Newtonian order. We check that our result is the same in both gauges, as appropriate for a gauge-invariant quantity, and agrees with the currently known 3.5 post-Newtonian results.

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