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中国物理学会期刊

引力场的能量动量赝张量与轴对称体系的引力辐射

CSTR: 32037.14.aps.31.1215

THE ENERGY-MOMENTUM PSEUDOTENSOR OF THE GRAVITATIONAL FIELD AND THE GRAVITATIONAL RADIATION EMITTED BY AN AXISYMMETRIC SYSTEM

CSTR: 32037.14.aps.31.1215
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  • 本文计算了轴对称体系的引力辐射总功率。用胡宁的τ(n)αβ表达式和Bondi的柱面波解直接计算导出-(dE)/(dt)=1/2∫x0c02sinθdθ。这个结果与Bondi不用任何ταβ表达式得到的公式完全相同,并证明辐射总功率是恒正的。但是,由郑玉昆的ταβ表达式得到的结果与Bondi的公式不一致,并表明辐射总功率不是恒正的。

     

    In this paper, we have calculated the total gravitational radiation emitted by an axisymmetric system per unit time. Direct calculation using Hu Ning's expression for the τ(n)αβ and Bondi's cylindrical wave solution has led to -(dE)/(dt)=1/2∫x0c02sinθdθ. This result is identical with Bondi's formula that has been obtained without using any expression for the ταβ and shows that the total power radiated is always positive. The result obtained from Zheng Yu-kun's expression for the ταβ, however, does not agree with Bondi's formula and indicates that total power radiated is not always positive.

     

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