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arXiv 0910.2857gr-qc
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后牛顿方法:双星问题的解析结果

Post-Newtonian methods: Analytic results on the binary problem

Gerhard Schäfer

AI总结:

本文研究广义相对论的后牛顿近似方案,采用两种坐标条件,在近远区开展后牛顿展开,处理多种物质模型,给出高阶自旋双星哈密顿量,还探讨了黑洞与狄拉克δ函数的相关应用问题。

摘要:

本文详细阐述了爱因斯坦广义相对论的近似方案,这类方案以牛顿引力理论为迭代起点。研究采用两种不同的坐标条件来表述爱因斯坦场方程:分别是Arnowitt、Deser和Misner正则形式下的广义各向同性坐标,以及洛伦兹协变的Fock-de Donder方法中的调和坐标。文中明确了孤立系统的守恒量,并引入了庞加莱代数。研究在近区和远区(辐射区)开展了后牛顿展开,强调了多极展开与后牛顿方案的自然适配性。所处理的物质模型包括理想流体、纯点质量,以及用于模拟旋转黑洞的带自旋和质量四极矩的点质量。本文以显式形式给出了多种适用于更高后牛顿阶的自旋双星哈密顿量,还讨论了后牛顿展开计算中黑洞的精细运用,以及广义相对论中狄拉克δ函数的相关问题。

英文摘要:

A detailed account is given on approximation schemes to the Einstein theory of general relativity where the iteration starts from the Newton theory of gravity. Two different coordinate conditions are used to represent the Einstein field equations, the generalized isotropic ones of the canonical formalism of Arnowitt, Deser, and Misner and the harmonic ones of the Lorentz-covariant Fock-de Donder approach. Conserved quantities of isolated systems are identified and the Poincaré algebra is introduced. Post-Newtonian expansions are performed in the near and far (radiation) zones. The natural fitting of multipole expansions to post-Newtonian schemes is emphasized. The treated matter models are ideal fluids, pure point masses, and point masses with spin and mass-quadrupole moments modelling rotating black holes. Various Hamiltonians of spinning binaries are presented in explicit forms to higher post-Newtonian orders. The delicate use of black holes in post-Newtonian expansion calculations and of the Dirac delta function in general relativity find discussions.

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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