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arXiv 1111.5610gr-qcastro-ph.COastro-ph.GA
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质量比为线性量级的完全无自旋有效单体度规

The complete non-spinning effective-one-body metric at linear order in the mass ratio

Enrico Barausse, Alessandra Buonanno, Alexandre Le Tiec

摘要:

本文利用另一篇文章的主要结果,即在试验粒子近似下,在首阶计算了圆轨道非自旋致密双星系统的结合能,得到了有效单体度规分量g^efftt在质量比一阶的精确表达式。将这些结果与最近在史瓦西几何中对圆轨道近星点推进的引力自作用力计算相结合,还确定了EOB度规分量g^eff_rr在质量比中的线性量级。这些结果假设在第二和第三后牛顿(PN)阶的实哈密顿量和有效哈密顿量之间的映射在所有PN阶都成立。我们的研究结果也证实了的优势,如果目标是获得一个灵活的模型,可以顺利地连接测试质量和等质量的限制周围的PN动力学的测试粒子的限制。

英文摘要:

Using the main result of a companion paper, in which the binding energy of a circular-orbit non-spinning compact binary system is computed at leading-order beyond the test-particle approximation, the exact expression of the effective-one-body (EOB) metric component g^eff_tt is obtained through first order in the mass ratio. Combining these results with the recent gravitational self-force calculation of the periastron advance for circular orbits in the Schwarzschild geometry, the EOB metric component g^eff_rr is also determined at linear order in the mass ratio. These results assume that the mapping between the real and effective Hamiltonians at the second and third post-Newtonian (PN) orders holds at all PN orders. Our findings also confirm the advantage of resumming the PN dynamics around the test-particle limit if the goal is to obtain a flexible model that can smoothly connect the test-mass and equal-mass limits.

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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