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arXiv 1612.02504gr-qc
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Kerr几何中守恒自力动力学的Hamilton表述

Hamiltonian Formulation of the Conservative Self-Force Dynamics in the Kerr Geometry

Ryuichi Fujita, Soichiro Isoyama, Alexandre Le Tiec, Hiroyuki Nakano, Norichika Sago, Takahiro Tanaka

摘要:

我们制定了一个哈密顿描述的点粒子在克尔时空的一般(偏心,倾斜)轨道,这占了保守的引力自作用力的影响。这个公式依赖于粒子的运动描述为在一定的光滑有效时空中的测地线,在(广义)作用角变量。阐明了规范自由度在哈密顿动力学中所起的作用,我们提取了包含在保守自作用力中的规范不变信息。我们还提出了一个可能的规范选择的轨道动力学可以描述一个有效的哈密顿量,只写在作用变量。作为我们的哈密顿公式在这个规范的应用,我们导出了保守的自我力修正克尔最内层稳定的球形(倾斜或圆形)轨道的轨道频率。这种规范的选择也使我们能够建立一个“力学第一定律”的黑洞粒子的二元系统,在领先的顺序超过测试质量近似。

英文摘要:

We formulate a Hamiltonian description of the orbital motion of a point particle in Kerr spacetime for generic (eccentric, inclined) orbits, which accounts for the effects of the conservative part of the gravitational self-force. This formulation relies on a description of the particle's motion as geodesic in a certain smooth effective spacetime, in terms of (generalized) action-angle variables. Clarifying the role played by the gauge freedom in the Hamiltonian dynamics, we extract the gauge-invariant information contained in the conservative self-force. We also propose a possible gauge choice for which the orbital dynamics can be described by an effective Hamiltonian, written solely in terms of the action variables. As an application of our Hamiltonian formulation in this gauge, we derive the conservative self-force correction to the orbital frequencies of Kerr innermost stable spherical (inclined or circular) orbits. This gauge choice also allows us to establish a "first law of mechanics" for black-hole-particle binary systems, at leading order beyond the test-mass approximation.

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