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arXiv 1111.2596gr-qcmath-phmath.MP
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CMC初值问题的Bondi-Sachs能量动量

Bondi-Sachs Energy-Momentum for the CMC Initial Value Problem

James M. Bardeen, Luisa T. Buchman

摘要:

详细分析了广义相对论初值方程对常平均外曲率(CMC)超曲面的共形因子和共形外曲率渐近性态的约束.我们推导出明确的Bondi-Sachs能量和动量的CMC超曲面的渐近展开系数在未来零无穷远。Bondi-Sachs能量、动量和角动量的精确数值结果用于物理解释Buchman等人[Phys. Rev. D 80:084024(2009)]早期获得的共形平坦CMC超曲面上的初值方程的Bowen-York解。

英文摘要:

The constraints on the asymptotic behavior of the conformal factor and conformal extrinsic curvature imposed by the initial value equations of general relativity on constant mean extrinsic curvature (CMC) hypersurfaces are analyzed in detail. We derive explicit formulas for the Bondi-Sachs energy and momentum in terms of coefficients of asymptotic expansions on CMC hypersurfaces near future null infinity. Precise numerical results for the Bondi-Sachs energy, momentum, and angular momentum are used to interpret physically Bowen-York solutions of the initial value equations on conformally flat CMC hypersurfaces of the type obtained earlier by Buchman et al. [Phys. Rev. D 80:084024 (2009)].

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