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arXiv 2202.09345gr-qc
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自旋紧双星的力学第一定律:偶极序

First Law of Mechanics for Spinning Compact Binaries: Dipolar Order

Paul Ramond, Alexandre Le Tiec

摘要:

基于Iyer和Wald的Noether电荷形式,我们导出了一个允许Killing矢量场的时空变分公式,用于具有紧支撑的一般能量动量分布。应用这一一般结果的特殊情况下,一个旋转的紧凑的物体沿着一个精确的圆形轨道,使用多极引力骨架形式主义建模的二进制系统,我们推导出第一定律的紧凑的二进制力学偶极顺序。我们证明了这个新的结果与先前推导的自旋致密物体的二进制系统的正则哈密顿第一定律的等价性,自旋与轨道角动量共线。本文铺平了道路的二元力学第一定律的扩展到下一个四极阶,从而占自旋引起的和潮汐引起的变形的致密体。

英文摘要:

Building upon the Noether charge formalism of Iyer and Wald, we derive a variational formula for spacetimes admitting a Killing vector field, for a generic energy-momentum distribution with compact support. Applying this general result to the particular case of a binary system of spinning compact objects moving along an exactly circular orbit, modelled using the multipolar gravitational skeleton formalism, we derive a first law of compact binary mechanics at dipolar order. We prove the equivalence of this new result with the canonical Hamiltonian first law previously derived for binary systems of spinning compact objects, for spins colinear with the orbital angular momentum. This paper paves the way to an extension of the first law of binary mechanics to the next quadrupolar order, thereby accounting for the spin-induced and tidally-induced deformability of the compact bodies.

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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